CN203056756U - Electric cylinder and its manual adjustment mechanism - Google Patents

Abstract

The utility model provides an electric cylinder and a manual adjustment mechanism thereof, comprising: an actuating rod and a screw rod threadedly connected and transmitted thereto; a motor connected and driving the screw rod; a connecting seat connected to the actuating rod, comprising a positioning column and a rotating shaft rod axially extending from the positioning column; a connecting ring sleeved on the positioning column and rotating with it, and a sliding groove is provided on the outer peripheral wall of the connecting ring; a supporting ring sleeved on the rotating shaft rod; a cylindrical joint, one end of which is sleeved outside the supporting ring, and the other end is threadedly connected to a pivotal end cover, and a locking groove connected to the sliding groove is provided on the outer peripheral wall of the cylindrical joint; a hand wheel sleeved on the cylindrical joint and the connecting ring and shielding the rotating shaft rod, and a convex key slidably connected to the sliding groove and the locking groove is convexly provided on the inner wall of the hand wheel, and the connecting ring and the cylindrical joint can be selected to be linked to each other or disengaged through the axial movement of the hand wheel.

Description

Electric cylinder and its manual adjustment mechanism

technical field

The utility model relates to an electric cylinder, in particular to an electric cylinder with a manual adjustment mechanism and the manual adjustment mechanism.

Background technique

The electric cylinder is an actuating element commonly used to push furniture, for example, it can be applied to the push of opening and closing doors, or the adjustment of the inclination angle of the bed surface of a hospital bed. The electric cylinder generally includes an outer tube, and an actuating rod is pierced through the outer tube. The actuating rod is hollow and has a screw threaded inside. A motor is connected to drive the screw to rotate axially, and when the screw rotates axially, it drives the actuating rod to move axially. When the electric cylinder is used for bed adjustment, one end of its outer tube is fixed to the bed frame, and the actuating rod is connected to the bed surface. In order to adjust the inclination angle of the bed surface more accurately, a manual adjustment mechanism can be set on it to provide operators with manual fine-tuning .

The existing manual adjustment mechanism generally drives the actuating rod to rotate relative to the screw rod through a sleeve that is placed outside the actuating rod to move the actuating rod, and a locking structure is required inside it. When the motor drives the screw rod to rotate , the locking structure is used to fix the actuating rod so that it cannot rotate along its axis. Since the electric cylinder is subjected to a considerable force when it is actuated, the locking structure contains quite a few small parts, so its strength is not as good as other components of the electric cylinder, and errors are easily formed when the electric cylinder is under force, which makes the actuation of the electric cylinder deviate.

In view of this, the inventor of the present invention aimed at the above-mentioned prior art, devoted himself to research and combined with the application of theories, and tried his best to solve the above-mentioned problems, which became the goal of the inventor's improvement.

Contents of the invention

The purpose of the utility model is to provide an electric cylinder with a manual adjustment mechanism and the manual adjustment mechanism.

In order to achieve the above object, the utility model provides an electric cylinder, which includes: an actuating mechanism including an actuating rod and a screw screw connected with it; a motor connected to drive the screw; a connecting seat connected to the actuating rod, which It includes a positioning column and a rotating shaft axially extending from the positioning column; a link ring is sleeved on the positioning column and rotates with it, and a slide groove is opened on its outer peripheral wall; a supporting ring is sleeved on the rotating shaft; a The cylindrical joint is set outside the supporting ring, and a locking groove that can communicate with the chute is opened on the outer peripheral wall; a hand wheel is sleeved on the cylindrical joint and the linkage ring and shields the rotating shaft, and the inner wall is protruding. There is a protruding key slidably connected in the sliding groove and the locking groove, and the interlocking ring and the cylindrical joint can be selected to be mutually interlocking or detachable through the axial movement of the hand wheel.

Preferably, the aforementioned electric cylinder further includes an elastic member respectively abutting against the hand wheel and the connecting seat along the axial direction of the hand wheel.

Preferably, the aforementioned electric cylinder further includes an annular bearing sleeved on the rotating shaft and abutting against the inner wall of the cylindrical joint.

Preferably, in the aforementioned electric cylinder, an inner ring rib protrudes from the inner wall of the cylindrical joint, and the ring bearing abuts against the inner ring rib and the positioning column.

Preferably, in the aforementioned manual adjustment mechanism of the electric cylinder, the convex key is snapped into the positioning groove.

In order to achieve the above purpose, the utility model also provides a manual adjustment mechanism of the electric cylinder, which is axially connected to the actuating rod of the electric cylinder, which includes: a connecting seat connected to the actuating rod, which includes a positioning column and a self-positioning column An axially extending rotating shaft; a link ring is sleeved on the positioning column and rotates with it, and a chute is opened on the outer peripheral wall; a supporting ring is sleeved on the rotating shaft; a cylindrical joint is sleeved on the supporting ring In addition, a locking groove that can communicate with the chute is opened on the outer peripheral wall; a hand wheel is sleeved on the cylindrical joint and the interlocking ring and shields the rotating shaft, and the inner wall is protrudingly provided with a sliding connection between the chute and the chute. A convex key in the locking groove, moving the hand wheel can select the interlocking ring and the cylinder joint to be interlocked or disengaged.

Preferably, the aforementioned manual adjustment mechanism of the electric cylinder further includes an elastic member respectively abutting against the hand wheel and the connecting seat along the axial direction of the hand wheel.

Preferably, the aforementioned manual adjustment mechanism of the electric cylinder further includes an annular bearing sleeved on the rotating shaft and abutting against the inner wall of the cylindrical joint.

Preferably, in the aforementioned manual adjustment mechanism of the electric cylinder, an inner ring rib protrudes from the inner wall of the cylinder joint, and the ring bearing abuts against the inner ring rib and the positioning column.

Preferably, in the aforementioned manual adjustment mechanism of the electric cylinder, the convex key is snapped into the positioning groove.

The electric cylinder and its manual adjustment mechanism of the utility model strengthen the connection structure between the cylindrical joint and the connecting seat by the support ring to ensure the accuracy of the action, and the cylindrical joint includes a cylindrical joint and a pivoted end cover, which can be Firstly, the cylindrical joint is locked and fixed with the connecting seat, and then the pivotal end cover is screwed to the cylindrical joint to cover the fixing screw, so that it is easy to assemble and effectively improves the shortcomings of the prior art.

Description of drawings

Fig. 1 is the three-dimensional schematic view of the electric cylinder of the preferred embodiment of the utility model;

Fig. 2 is a three-dimensional schematic diagram of the manual adjustment mechanism of the electric cylinder in a preferred embodiment of the present invention;

Fig. 3 is an exploded schematic view of the manual adjustment mechanism of the electric cylinder in a preferred embodiment of the present invention;

Fig. 4 is an exploded schematic view (locked state) of the manual adjustment mechanism of the electric cylinder of the preferred embodiment of the utility model in Fig. 2;

Fig. 5 is an exploded schematic view (operating state) of the manual adjustment mechanism of the electric cylinder of the preferred embodiment of the utility model in Fig. 2 .

reference sign

100: Actuating mechanism 110: Outer tube

120: Actuating rod 130: Screw rod

200: Motor 300: Manual adjustment mechanism

310: Connecting seat 311: Cylindrical seat

312: Flange 313: Stud

314: positioning column 315: rotating shaft

320: Linkage ring 321: Positioning hole

322: Chute 330: Support ring

340: Cylindrical joint 341: Socket end

342: Pivot end 343: Locking groove

344: Inner Ring Rib 350: Pivot End Cap

351: Pivot hole 360: Hand wheel

361: Convex key 370: Elastic piece

380: Ring bearing 391: Fixing screw

392: Gasket

Detailed ways

Referring to FIG. 1 and FIG. 2 , a preferred embodiment of the present invention provides an electric cylinder, which includes an actuating mechanism 100 , a motor 200 and a manual adjustment mechanism 300 . The actuating mechanism 100 includes an outer tube 110, and an actuating rod 120 is pierced inside the outer tube 110. The actuating rod 120 is hollow and is provided with a screw rod 130 inside, and the relative position between the screw rod 130 and the outer tube 110 is fixed. . The motor 200 is connected to drive the screw 130 to rotate axially. One end of the actuating rod 120 is screwed to the thread of the screw rod 130 through a nut (not shown) to drive the screw rod 130 . When the screw rod 130 rotates axially, the actuating rod 120 is driven to move axially.

2 and 3, in the electric cylinder of the present utility model, its manual adjustment mechanism 300 includes a connecting seat 310, a link ring 320, two support rings 330, a cylindrical joint 340, a The pivotal end cover 350 , a hand wheel 360 and an elastic member 370 are connected.

The connecting seat 310 includes a cylindrical seat body 311, and an annular flange 312 extends radially from the cylindrical seat body 311, and a stud 313 coaxially extends from one end of the cylindrical seat body 311, and the stud stud 313 is screwed in the axial direction. On the actuating rod 120 , a positioning column 314 extends coaxially from the other end of the cylinder base 311 , and a rotating shaft 315 coaxially extends from the end of the positioning column 314 . The cross-section of the positioning post 311 is preferably oval-shaped, and the rotating shaft 315 is cylindrical.

The inner side of the linkage ring 320 has a positioning hole 321, which is preferably in the shape of a broken circle and fits with the aforementioned positioning column 314 to be used as an axial positioning so that the linkage ring 320 and the positioning column 314 are rotated axially. A plurality of sliding slots 322 parallel to the axial direction of the interlocking ring 320 are provided on the outer peripheral wall for axial rotation, and the sliding slots 322 are arranged on the outer peripheral wall of the interlocking ring 320 at equal intervals.

The supporting ring 330 is sheathed on the end of the rotating shaft 315 , and its outer side abuts against the inner wall of the cylindrical joint 340 to support and maintain the coaxial configuration of the rotating shaft 315 and the cylindrical joint 340 .

The cylindrical joint 340 is roughly in the shape of a barrel with two ends open, and it is arranged coaxially with the interlocking ring 320. Preferably, the outer diameter of the interlocking ring 320 is the same as that of the cylindrical joint 340 (but this practical The new type is not limited to this). The two ends of the cylindrical joint 340 are respectively a sleeve joint end 341 and a pivot joint end 342, and a plurality of locking grooves 343 are opened on the outer peripheral wall, and each locking groove 343 is arranged parallel to the axial direction of the cylindrical joint 340, and the The locking grooves 343 are preferably equidistantly arranged on the outer edge of the opening of the socket end 341, and the number thereof matches the number of sliding grooves 322. When the linkage ring 200 is rotated to a specific position relative to the cylindrical joint 310, each The slide slots 220 are respectively aligned and communicated with a locking slot 330 . An inner ring rib 344 protrudes from an inner wall of the cylindrical joint 340 . The sleeve end 341 is sleeved into the rotating shaft 315 and sleeved outside the support ring 330 , and the cylinder joint 340 can rotate relative to the cylinder base 311 axially.

The pivotal end cap 350 is arranged on the pivotal end 342 of the cylindrical joint 340, and at least one pivotal hole 351 is opened on the pivotal end cap 350, and the pivotal end cap 350 is preferably screwed into the circular joint in a threaded manner. The pivot end 342 of the cartridge joint 340 is open.

The hand wheel 360 is sleeved outside the cylindrical joint 340 and the interlocking ring 320, and the inner wall of the hand wheel 360 is parallel to its axial direction and is provided with a plurality of protruding keys 361, the number of which corresponds to the number of the chute 322, and Corresponding to the position of the aforementioned chute 322, it is arranged in an equidistant circle, and each convex key 361 is slid between its corresponding chute 322 and the locking groove 343, so moving the hand wheel 360 can select the interlocking ring 320 and The cylinder joints 340 are linked or separated from each other. When the interlocking ring 320 and the cylindrical joint 340 are disengaged, the hand wheel 360 is not restricted by the cylindrical joint 340, and it can drive the actuating rod 120 to rotate through the interlocking ring 320 and the connecting seat 310 so that The actuating rod 120 and the screw rod 130 move relative to each other along the axial direction.

In this embodiment, the elastic member 370 is preferably an equidiameter cylindrical spring, but the utility model is not limited thereto. The protruding keys 361 respectively abut against the inner side of the hand wheel 360 along the axial direction, and the other ends abut against the flange 312 of the connecting seat 310 .

An annular bearing 380 is provided on the outer sleeve of the root of the aforementioned rotating shaft 315. Preferably, the support ring 330 and the annular bearing 380 are located on both sides of the inner ring rib 344, and the annular bearing 380 abuts against the inner ring 344 and the inner ring rib 344. The posts 314 are positioned to reduce rotational resistance between the rotational shaft 315 and the barrel joint 340 . The end of the rotating shaft 315 is locked with a fixing screw 391 along its axial direction, and a washer 392 is sandwiched between the end of the rotating shaft 315 and the fixing screw 391, and the washer 392 protrudes from the periphery of the rotating shaft 315 and is pressed axially. In the support ring 330, the support ring 330 axially pushes against the inner ring rib 344, and the inner ring rib 344 further axially presses the annular bearing 380 on the end of the positioning post 314, thereby fixing the cylindrical joint 340 and the Connecting seat 310.

Referring to Fig. 4, in the electric cylinder of the present utility model, when the manual adjustment mechanism 300 is in the locked state, the cylindrical joint 340 is fixed and cannot rotate along its axial direction. When the hole is locked, the hand wheel 360 is moved axially due to being pushed by the elastic member 370, so that one end of each protruding key 361 is snapped into its aligned locking groove 343, and the hand wheel 360 is thus locked by the cylinder joint 340. Locked and unable to rotate axially, the hand wheel 360 fixes the actuating rod 120 so that the actuating rod 120 cannot rotate along its axial direction. At this time, the motor 200 drives the screw rod 130 to rotate to make the actuating rod 120 and the screw rod 130 rotate axially. relatively mobile.

Referring to Fig. 5, when the manual adjustment mechanism of the electric cylinder of the present utility model is in operation state, the hand wheel 360 is pushed toward the actuator rod 120 along its axial direction so that the convex key 361 withdraws from the locking groove 343, and the hand wheel 360 and the cylinder The joints 310 are respectively axially rotatable. At this time, the axial rotation of the handwheel 360 drives the actuating rod 120 to rotate axially, so that the actuating rod 120 is pushed by the threads of the screw rod 130 to move along its axial direction.

The manual adjustment mechanism of the electric cylinder of the present utility model can adjust the position of the actuating rod 120 relative to the outer tube 110 by manually rotating the hand wheel 360, and the linkage ring 320 and the circle can be selected by moving the hand wheel 360. The cartridge joints 340 are linked or disengaged from each other. The manual adjustment mechanism of the electric cylinder of the present invention uses the support ring 330 to strengthen the connection structure between the cylinder joint 340 and the connecting seat 310 to ensure the accuracy of the movement. Furthermore, the cylindrical joint 340 and the connecting seat 310 can be fixed in the axial direction as described above, and then the pivotal end cover 350 is screwed into the cylindrical joint 340 to cover the fixing screw 391. When the fixing screw 391 is locked, it will not Partially blocked by the pivoting end cap 320, it is therefore easy to assemble.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the scope of the claims of the utility model. Other equivalent changes using the patent spirit of the utility model shall fall within the scope of the claims of the utility model.

Claims (10)

1. An electric cylinder, characterized in that, comprising: An actuation mechanism, including an actuation rod and a screw connected with the actuation rod; a motor coupled to and driving the screw; and A manual adjustment mechanism includes a connecting seat, a link ring, a support ring, a cylinder joint and a hand wheel, the connecting seat is connected to the actuating rod, the connecting seat includes a positioning column and a shaft from the positioning column A rotating shaft extends to the direction, the linkage ring is sleeved on the positioning column and rotates accordingly, a slide groove is opened on the outer peripheral wall of the linkage ring, the support ring is sleeved on the rotation shaft, and the cylindrical joint sleeve Outside the support ring, and the cylindrical joint is screwed to a pivoted end cover, a locking groove that can communicate with the chute is opened on the outer peripheral wall of the cylindrical joint, and the hand wheel is sleeved on the cylinder The joint and the interlocking ring shield the rotating shaft. The inner wall of the hand wheel is protruded with a convex key slidingly connected in the sliding groove and the locking groove. The axial movement of the hand wheel can select the The interlocking ring and the cylindrical joint are in interlocking or disengaging action. 2 . The electric cylinder according to claim 1 , characterized in that, the inner side of the linkage ring has a positioning hole which fits and sockets with the positioning post. 3 . 3 . The electric cylinder according to claim 1 , further comprising an elastic member respectively abutting against the hand wheel and the connecting seat along the axial direction of the hand wheel. 4 . 4. The electric cylinder according to claim 1, further comprising an annular bearing sleeved on the rotating shaft and abutting against the inner wall of the cylindrical joint. 5 . The electric cylinder according to claim 1 , wherein an inner ring rib protrudes from an inner wall of the cylindrical joint, and the ring bearing abuts against the inner ring rib and the positioning post. 6. A manual adjustment mechanism for an electric cylinder, characterized in that it comprises: A connection seat, including a positioning column and a rotating shaft axially extending from the positioning column; A linkage ring, which is sleeved on the positioning column and rotates accordingly, and a sliding groove is opened on the outer peripheral wall of the linkage ring; a support ring sleeved on the rotating shaft; a cylindrical joint, which is sleeved on the supporting ring and shields the rotating shaft, and a locking groove that can communicate with the sliding groove is opened on the outer peripheral wall of the cylindrical joint; and A hand wheel is sheathed outside the cylindrical joint and the interlocking ring. The inner wall of the hand wheel is protruded with a convex key slidingly connected in the chute and the locking groove. Moving the hand wheel can Select the interlocking ring and the cylindrical joint to be interlocked or disengaged from each other. 7 . The manual adjustment mechanism of the electric cylinder according to claim 6 , characterized in that, the inner side of the interlocking ring has a positioning hole matched with the positioning column. 8 . 8 . The manual adjustment mechanism of the electric cylinder according to claim 6 , further comprising an elastic member respectively abutting against the hand wheel and the connecting seat along the axial direction of the hand wheel. 9 . The manual adjustment mechanism of the electric cylinder according to claim 6 , further comprising an annular bearing sleeved on the rotating shaft and abutting against the inner wall of the cylindrical joint. 10 . 10 . The manual adjustment mechanism of the electric cylinder according to claim 6 , wherein an inner ring rib protrudes from the inner wall of the cylindrical joint, and the ring bearing abuts against the inner ring rib and the positioning post. 11 .

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