CN114265169A - One-way continuous rotation adjusting cam barrel device - Google Patents
One-way continuous rotation adjusting cam barrel device Download PDFInfo
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- CN114265169A CN114265169A CN202111558396.8A CN202111558396A CN114265169A CN 114265169 A CN114265169 A CN 114265169A CN 202111558396 A CN202111558396 A CN 202111558396A CN 114265169 A CN114265169 A CN 114265169A
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Abstract
本发明涉及一种单向连续旋转调节凸轮筒装置，包括固定筒、凸轮筒、凸轮筒连接块和导钉，固定筒和凸轮筒从内而外同轴套设、且可相对旋转，固定筒上设有沿其自身轴向的直槽，凸轮筒上设有连续环绕自身筒壁整圈的曲线槽，凸轮筒连接块横跨在曲线槽上、且其两端分别与曲线槽两侧的凸轮筒筒壁连接；固定筒内设有待调节件，导钉的一端与待调节件固定连接，导钉的另一端贯穿直槽、并延伸到曲线槽内，导钉与直槽、曲线槽分别滑动配合。当凸轮筒相对固定筒旋转时，由于直槽限位，待调节件沿固定筒轴向运动；由于曲线槽为整圈，凸轮筒单向连续旋转可带动待调节零件在直槽中做直线往复调节，可完全忽略典型凸轮筒调节机构往复旋转凸轮筒调节的回差现象。
The invention relates to a unidirectional continuous rotation adjusting cam cylinder device, comprising a fixed cylinder, a cam cylinder, a cam cylinder connecting block and a guide pin. There is a straight groove along its own axial direction, the cam cylinder is provided with a curved groove continuously surrounding its own cylinder wall, the cam cylinder connecting block spans on the curved groove, and its two ends are respectively connected with the two sides of the curved groove. The cam barrel is connected with the barrel wall; the fixed barrel is provided with a to-be-adjusted piece, one end of the guide pin is fixedly connected to the to-be-adjusted piece, the other end of the guide pin penetrates the straight groove and extends into the curved groove, and the guide pin is connected to the straight groove and the curved groove respectively. Slip fit. When the cam cylinder rotates relative to the fixed cylinder, the part to be adjusted moves axially along the fixed cylinder due to the limit of the straight groove; since the curved groove is a full circle, the cam cylinder can continuously rotate in one direction to drive the part to be adjusted to reciprocate in a straight line in the straight groove Adjustment, can completely ignore the hysteresis phenomenon of the typical cam barrel adjustment mechanism reciprocating rotating cam barrel adjustment.
Description
Technical Field
The invention relates to the technical field of photoelectric application, in particular to a one-way continuous rotation adjusting cam barrel device.
Background
Due to the actual use requirement of common optical products, the optical system is often required to be adjusted to a certain degree according to different use requirements, and the axial position of the lens is generally adjusted. For cylindrical optical products, the adjustment of the lens is carried out by driving the linear motion of the part to be adjusted through the rotary motion of the adjusting device. The existing commonly used adjusting device generally depends on the machining precision, the adjusting precision and the adjusting smoothness degree are difficult to ensure the adjusting precision and the resistance in the adjusting process, the adjustment is realized by the reverse rotation of the adjusting device when reverse adjustment is needed, however, the return difference phenomenon in the reverse adjustment is difficult to eliminate, and great difficulty is brought to the machining and assembling process. An adjusting device with unidirectional continuous adjustment, adjustable resistance and no return difference is urgently needed.
Disclosure of Invention
The invention provides a unidirectional continuous rotation adjusting cam barrel device aiming at the technical problems in the prior art, which can perform unidirectional continuous adjustment and solve the problem of return difference during reverse adjustment of a traditional typical cam barrel structure.
The technical scheme for solving the technical problems is as follows:
a unidirectional continuous rotation cam cylinder adjusting device comprises a fixed cylinder, a cam cylinder connecting block and a guide nail, wherein the fixed cylinder and the cam cylinder are coaxially sleeved from inside to outside and can rotate relatively, a straight groove along the axial direction of the fixed cylinder is arranged on the fixed cylinder, a curved groove which continuously surrounds the whole circle of the cylinder wall of the cam cylinder is arranged on the cam cylinder, the cam cylinder connecting block stretches across the curved groove, and two ends of the cam cylinder connecting block are respectively connected with the cylinder walls of the cam cylinder at two sides of the curved groove; the fixed cylinder is internally provided with a part to be adjusted, one end of the guide nail is fixedly connected with the part to be adjusted, the other end of the guide nail penetrates through the straight groove and extends into the curved groove, and the guide nail is in sliding fit with the straight groove and the curved groove respectively.
On the basis of the technical scheme, the invention can be further improved as follows.
Preferably, at least two curved grooves are arranged on the cam cylinder, the adjacent curved grooves are the same in shape and are arranged in parallel along the axial direction of the cam cylinder, and the intervals between the adjacent curved grooves along the axial direction of the cam cylinder are equal.
Preferably, the periphery of the guide nail is sleeved with a guide sleeve, and the guide sleeve has elasticity.
Preferably, a plurality of mounting holes are formed in the cam cylinder and are respectively formed in two sides of the curved groove, and two ends of the cam cylinder connecting block are fixedly mounted on the mounting holes in the two sides of the curved groove through connecting pieces respectively.
Preferably, the end of the fixed cylinder extends out of the cam cylinder, a rotary disc is fixedly arranged on the cam cylinder, and the fixed cylinder and the rotary disc can coaxially rotate relatively.
The invention has the beneficial effects that: according to the unidirectional continuous rotation adjusting cam cylinder device, the fixed cylinder is fixed, the to-be-adjusted piece is assembled in the fixed cylinder and matched with the inner wall of the fixed cylinder, the cam cylinder is rotated, the cam cylinder drives the guide nail on the to-be-adjusted piece to slide along the curved groove of the cam cylinder, and the to-be-adjusted piece can only move along the axial direction of the fixed cylinder due to the limiting effect of the straight groove on the guide nail on the fixed cylinder; because the curved groove on the cam cylinder is a whole circle, the cam cylinder rotates in a single direction continuously to drive the piece to be regulated to do reciprocating linear motion in the straight groove of the fixed cylinder, thereby realizing the function of single-direction continuous regulation of the device. The linear reciprocating adjustment of the to-be-adjusted piece is realized through the unidirectional continuous rotation of the cam barrel, the return difference phenomenon of the traditional reciprocating rotation cam barrel adjusting mechanism of the typical cam barrel can be completely ignored, the curve groove gap can be adjusted through setting the size of the cam barrel connecting block, the resistance in the adjusting process is controllable, the production, assembly and adjustment are easy, and the customer experience is good.
Drawings
FIG. 1 is a schematic cross-sectional view of the overall structure of the present embodiment;
FIG. 2 is an exploded view of the overall structure of the present embodiment;
FIG. 3 is a schematic view of a cam cylinder structure in this embodiment;
FIG. 4 is a graph of the output of the optical design requirement in this embodiment;
FIG. 5 is a graph illustrating the output periodicity of the expansion of the optical design requirement in this embodiment;
FIG. 6 is a graph of the output of the optimized optical design of the present embodiment;
fig. 7 is a graph of the output of the optimized optical design periodic expansion in the present embodiment.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the adjusting device comprises a fixed cylinder 101, a straight groove 2, a cam cylinder 201, a curved groove 202, a mounting hole 3, a cam cylinder connecting block 3, 4, a guide nail 5, a guide sleeve 6, a piece to be adjusted 601 and a mirror frame.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 3, the present embodiment provides a unidirectional continuous rotation adjustment cam cylinder device, including a fixed cylinder 1, a cam cylinder 2, a cam cylinder connecting block 3, and a guide pin 4, where the fixed cylinder 1 and the cam cylinder 2 are coaxially sleeved from inside to outside and can rotate relatively, a straight groove 101 is formed on the fixed cylinder 1 along its own axial direction, a curved groove 201 continuously surrounding its own cylinder wall for a whole circle is formed on the cam cylinder 2, and the straight groove 101 and the curved groove 201 can be partially overlapped. The cam barrel connecting block 3 spans the curve groove 201, and two ends of the cam barrel connecting block are respectively connected with the barrel walls of the cam barrels 2 at two sides of the curve groove 201. The adjustable nail is characterized in that a part to be adjusted 6 is arranged in the fixed cylinder 1, one end of the guide nail 4 is fixedly connected with the part to be adjusted 6, the other end of the guide nail 4 penetrates through the straight groove 101 and extends into the curved groove 201, and the guide nail 4 is in sliding fit with the straight groove 101 and the curved groove 201 respectively. In this embodiment, the cam cylinder 2 may be designed into a multi-segment cylinder according to actual needs, and a gap reserved between adjacent cylinders is used as the curved groove 201 of the cam cylinder 2. The adjacent cylinders are fixedly connected through the cam cylinder connecting block 3, and the cam cylinder connecting block 3 and the curved groove 201 do not interfere with each other. After the multiple sections of cylinders are connected, the gap between adjacent cylinders can be used as a continuous whole-circle cam curve groove 201 required in the actual adjusting process. The cam cylinder connecting block 3 is used for connecting the multi-section cam cylinder 2, the groove width of the curved groove 201 can be changed by changing the length of the cam cylinder connecting block 3, and the depth of the curved groove 201 of the cam can be adjusted by finely adjusting screw through holes in the cam cylinder connecting block 3, so that the control of the fit clearance of the curved groove is realized.
When the cam cylinder 2 is rotated to rotate coaxially and relatively with the fixed cylinder 1, the guide pin 4 on the to-be-adjusted piece 6 slides along the curved groove 201, but the straight groove 101 can only slide in the straight groove 101 due to the limiting effect of the straight groove 101, and under the dual action of the curved groove 201 and the straight groove 101, the guide pin 4 drives the to-be-adjusted piece 6 to move linearly in the straight groove 101. Because the curved groove 201 on the cam cylinder 2 is a continuous whole circle, the cam cylinder 2 rotates unidirectionally and continuously to drive the to-be-adjusted piece 6 to do reciprocating linear motion in the straight groove 101 of the fixed cylinder 1, thereby realizing the unidirectional continuous adjustment function of the device. The linear reciprocating adjustment of the to-be-adjusted piece 6 is realized through the unidirectional continuous rotation of the cam barrel 2, the return difference phenomenon of the traditional typical cam barrel 2 adjusting mechanism for adjusting the reciprocating rotation cam barrel 2 can be completely ignored, the curve groove gap can be adjusted by setting the size and the installation depth of the cam barrel connecting block 3, the resistance in the adjusting process is controllable, the production, assembly and adjustment are easy, and the customer experience is better.
In this embodiment, at least two curved grooves 201 are provided on the cam cylinder 2, the adjacent curved grooves 201 have the same shape and are arranged in parallel along the axial direction of the cam cylinder 2, and the intervals between the adjacent curved grooves 201 along the axial direction of the cam cylinder 2 are equal. Through the corresponding cooperation of many curved groove 201 with one or many straight flute 101 on the fixed cylinder 1 respectively, correspond one in every curved groove 201 and treat the guide pin 4 on the regulating part 6, can realize treating a plurality of regulating parts 6 of treating in the fixed cylinder 1 and carry out the synchronization regulation, make it be applicable to and need to control a plurality of scenes of treating the regulating part 6 simultaneously.
In this embodiment, a guide sleeve 5 is sleeved on the periphery of the guide pin 4, and the guide sleeve 5 is made of an elastic non-metal material, such as a plastic material. The guide sleeve 5 is used as an outer elastic sheath of the guide nail 4, so that firstly, the frictional resistance is reduced, and when the multi-section cam cylinder 2 is installed, a pre-tightening space is arranged in the elastic range of the guide sleeve 5, so that the hand feeling during use can be adjusted.
Preferably, the cam cylinder 2 is provided with a plurality of mounting holes 202, the plurality of mounting holes 202 are respectively arranged at two sides of the curved groove 201, and two ends of the cam cylinder connecting block 3 are respectively fixedly mounted on the mounting holes 202 at two sides of the curved groove 201 through connecting pieces such as screws. Interference between the cam barrel connecting block 3 and the guide pin 4/guide bush 5 can be prevented by adjusting the installation depth of the connecting member such as a screw.
In order to adjust the to-be-adjusted piece 6 conveniently, the end part of the fixed cylinder 1 extends out of the cam cylinder 2, a rotary table is fixedly arranged on the cam cylinder 2, and the fixed cylinder 1 and the rotary table can rotate coaxially and relatively. When adjusting, the tip of holding a fixed section of thick bamboo 1 in one hand is fixed, and the carousel on holding a fixed section of thick bamboo 1 in one hand rotates, can realize treating the axial position regulation of regulating part 6 in a fixed section of thick bamboo 1, and is easy and simple to handle.
In order to describe the present apparatus in more detail, the present embodiment takes a certain type of a continuous zoom lens adjusted by hand by 30-90 mm as an example, and the distance is exemplified. As shown in fig. 1, the lens design has four lenses, the first and fourth lenses from left to right are fixed lenses, the second lens is a zoom lens, the required adjustment stroke is 18mm, the third lens is a compensation lens, the required adjustment stroke is 30mm, and the required curve of the lens position output by the optical design is shown in fig. 4. The linkage adjustment of the zoom lens and the compensation lens in structural design is realized by adopting the cam cylinder 2 of the embodiment, two groups of different curve grooves 201 are required to be designed on the cam cylinder 2 to ensure that the positions of the zoom lens and the compensation lens meet the requirements of optical design at any angle.
According to the design idea of the unidirectional continuous adjustment cam cylinder 2 of the present embodiment, the axial position adjustment curve of the lens is periodically expanded, so that the continuous performance adjustment of the optical effect can be realized, and the lens position curve of the optical design is shown in fig. 5.
In fig. 5, during continuous adjustment, when the linear unidirectional maximum displacement is adjusted, the curve has an obvious uneven point, which does not meet the requirement of continuous and stable adjustment of the cam cylinder 2 adjusting mechanism, and the zoom lens position curve and the compensation lens position curve are optimized as shown in fig. 6 by combining the results of optical design optimization and structural cam cylinder 2 curve design optimization.
The axial position adjustment curve of the optimized lens is periodically expanded as shown in fig. 7 to form a continuous, smoothly-transitioning axial position adjustment curve. The optimized axial position adjusting curve of the cam barrel 2 meets the optical requirement and the stable transition requirement during continuous adjustment, and unidirectional continuous adjustment can be realized according to the design idea of the invention.
The shape and radian of a curve groove 201 of the cam barrel 2 are manufactured according to the optimized curve of the cam barrel 2, the zoom lens and the compensating lens are in radial small clearance fit with the fixed barrel 1 through respective lens frames 601, screw holes on the lens frames 601 are connected with screw holes at the lower end of the guide nails 4, and the guide nails 4 are sleeved with guide sleeves 5 and then are clamped in straight grooves 101 of the fixed barrel 1. When the cam barrel 2 is installed, the axial intervals among all the sections of the cam barrel 2 are adjusted according to the actual adjusting effect, after all the sections of the cam barrel 2 are connected by using the cam barrel connecting block 3, the rotating disc at the tail end of the cam barrel 2 is rotated, the axial adjustment of the zoom lens and the compensating lens can be realized through the rotating motion of the cam barrel 2, and the cam barrel 2 is continuously rotated, so that the unidirectional continuous adjustment of the optical effect of the lens can be realized according to the designed position curves of the zoom lens and the compensating lens without clearance and return difference.
The device for one-way continuous adjustment of the cam barrel 2 provided by the embodiment can realize linkage adjustment of multiple mirrors by increasing the number of the cam barrel 2 sections (namely, flexibly setting the number of the curved grooves 201) according to the adjustment requirement of multiple mirrors required by actual optical design, and can control the fit clearance between the guide pin 4 guide sleeve 5 and the curved grooves by adjusting the axial clearance between multiple sections of the cam barrel 2, thereby adjusting the smoothness of transmission. Because the unidirectional continuous rotation adjustment is adopted, the guide sleeve 5 of the guide nail 4 is well matched with the curve groove, the mechanical processing precision of the curve groove has small influence on the optical adjustment effect, and the difficulty in mechanical processing and whole machine assembly and adjustment is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The cam cylinder device capable of realizing unidirectional continuous rotation adjustment is characterized by comprising a fixed cylinder (1), a cam cylinder (2), a cam cylinder connecting block (3) and a guide nail (4), wherein the fixed cylinder (1) and the cam cylinder (2) are coaxially sleeved from inside to outside and can rotate relatively, a straight groove (101) along the axial direction of the fixed cylinder (1) is formed in the fixed cylinder (1), a curved groove (201) continuously surrounding the cylinder wall of the cam cylinder in a whole circle is formed in the cam cylinder (2), the cam cylinder connecting block (3) stretches across the curved groove (201), and two ends of the cam cylinder connecting block are respectively connected with the cylinder walls of the cam cylinder (2) on two sides of the curved groove (201); be equipped with in the solid fixed cylinder (1) and wait to adjust the piece (6), the one end of leading nail (4) with wait to adjust piece (6) fixed connection, the other end of leading nail (4) runs through straight flute (101) and extend to in curve groove (201), lead nail (4) with straight flute (101), curve groove (201) sliding fit respectively.
2. A unidirectional continuous rotation adjustment cam cylinder device according to claim 1, characterized in that the cam cylinder (2) is provided with at least two curved grooves (201), the adjacent curved grooves (201) have the same shape and are arranged in parallel along the axial direction of the cam cylinder (2), and the intervals between the adjacent curved grooves (201) along the axial direction of the cam cylinder (2) are equal.
3. A unidirectional continuous rotation adjustment cam cylinder device according to claim 1, characterized in that the guide pin (4) is sleeved with a guide sleeve (5) on the periphery, and the guide sleeve (5) has elasticity.
4. The unidirectional continuous rotation adjustment cam cylinder device according to claim 1, characterized in that the cam cylinder (2) is provided with a plurality of mounting holes (202), the plurality of mounting holes (202) are respectively arranged at two sides of the curved groove (201), and two ends of the cam cylinder connecting block (3) are respectively fixedly arranged on the mounting holes (202) at two sides of the curved groove (201) through connecting pieces.
5. A unidirectional continuous rotation adjustment cam cylinder device according to claim 1, characterized in that the end of the fixed cylinder (1) extends out of the cam cylinder (2), the cam cylinder (2) is fixedly provided with a rotary disc, and the fixed cylinder (1) can rotate coaxially and relatively with the rotary disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111558396.8A CN114265169A (en) | 2021-12-17 | 2021-12-17 | One-way continuous rotation adjusting cam barrel device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111558396.8A CN114265169A (en) | 2021-12-17 | 2021-12-17 | One-way continuous rotation adjusting cam barrel device |
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| Publication Number | Publication Date |
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| CN114265169A true CN114265169A (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111558396.8A Pending CN114265169A (en) | 2021-12-17 | 2021-12-17 | One-way continuous rotation adjusting cam barrel device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050286142A1 (en) * | 2004-06-14 | 2005-12-29 | Masayuki Inamoto | Zoom lens |
| JP2010008634A (en) * | 2008-06-26 | 2010-01-14 | Nidec Copal Corp | Lens barrel |
| CN204592192U (en) * | 2015-04-14 | 2015-08-26 | 成都赛诺特光学有限公司 | A kind of manual cam mechanism in rotary moving |
| CN109541776A (en) * | 2018-11-22 | 2019-03-29 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of mechanical cam zoom mechanism of guide rail guiding |
| CN110286460A (en) * | 2019-07-15 | 2019-09-27 | 西安应用光学研究所 | A kind of unilateral positioning cam driving mechanism of continuous magnification lens |
| CN209624878U (en) * | 2019-04-28 | 2019-11-12 | 深圳市大疆创新科技有限公司 | Cam canister gap adjusting mechanism, camera lens and photographic device |
| CN213399026U (en) * | 2020-11-05 | 2021-06-08 | 安徽长庚光学科技有限公司 | Mechanical focusing driving structure and large-aperture lens with same |
-
2021
- 2021-12-17 CN CN202111558396.8A patent/CN114265169A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050286142A1 (en) * | 2004-06-14 | 2005-12-29 | Masayuki Inamoto | Zoom lens |
| JP2010008634A (en) * | 2008-06-26 | 2010-01-14 | Nidec Copal Corp | Lens barrel |
| CN204592192U (en) * | 2015-04-14 | 2015-08-26 | 成都赛诺特光学有限公司 | A kind of manual cam mechanism in rotary moving |
| CN109541776A (en) * | 2018-11-22 | 2019-03-29 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of mechanical cam zoom mechanism of guide rail guiding |
| CN209624878U (en) * | 2019-04-28 | 2019-11-12 | 深圳市大疆创新科技有限公司 | Cam canister gap adjusting mechanism, camera lens and photographic device |
| CN110286460A (en) * | 2019-07-15 | 2019-09-27 | 西安应用光学研究所 | A kind of unilateral positioning cam driving mechanism of continuous magnification lens |
| CN213399026U (en) * | 2020-11-05 | 2021-06-08 | 安徽长庚光学科技有限公司 | Mechanical focusing driving structure and large-aperture lens with same |
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Application publication date: 20220401 |
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