TWM656311U - Power tool - Google Patents

Abstract

The invention relates to a power tool, comprising: a main body, including a transmission mechanism, a driving member and an axial hole, the driving member is driven by the transmission mechanism and can swing back and forth, the driving member includes an inner surface, and the axial hole defines an axial direction; a rotating seat, driven by the driving member, rotatably arranged in the axial hole, including an outer peripheral surface surrounding the axial direction, the outer peripheral surface of the rotating seat faces the inner surface of the driving member; and at least one spacer, arranged between the main body and the outer peripheral surface of the rotating seat, so that the outer peripheral surface of the rotating seat and the driving member are spaced.

Description

Power Tools

This invention relates to a power tool, in particular to a power ratchet tool.

Conventional power tools such as ratchet wrenches utilize pneumatic motors or similar devices to provide a driving member with a reciprocating swinging force relative to a driving head, and the driving member then drives the ratchet device to reciprocate, and the ratchet device drives the rotating seat to rotate in one direction, so that the driving portion of the rotating seat can rotate the assembled workpiece (such as a screw or nut), which can facilitate assembly or disassembly.

However, the outer peripheral surface of the rotating seat of this type of conventional power tool is in contact with the driving part or the tool body with a large area, and the rotating seat is easy to deviate to one side relative to the driving part or the tool body when rotating, thereby causing friction loss during startup and operation, higher temperature rise, reduced torque, and increased power consumption, which have disadvantages that need to be improved urgently.

Therefore, it is necessary to provide a novel and advanced power tool to solve the above-mentioned problems.

The main purpose of this invention is to provide a power tool that can significantly reduce the friction contact area and keep the rotating mechanism from deviating to one side, thereby reducing friction loss during startup and operation, reducing temperature rise, increasing torque, and reducing power consumption.

To achieve the above-mentioned purpose, the present invention provides a power tool, comprising: a main body, including a transmission mechanism, a driving member and an axial hole, the driving member is driven by the transmission mechanism and can swing back and forth, the driving member includes an inner surface, and the axial hole defines an axial direction; a rotating seat, driven by the driving member, rotatably arranged in the axial hole, including an outer circumferential surface surrounding the axial direction, the outer circumferential surface of the rotating seat faces the inner surface of the driving member; and at least one spacer, arranged between the main body and the outer circumferential surface of the rotating seat, so that the outer circumferential surface of the rotating seat and the driving member are spaced.

The following is merely an example to illustrate possible implementations of the present invention, but it is not intended to limit the scope of protection for the present invention, so it should be stated in advance.

Please refer to FIGS. 1 to 6 , which show an embodiment of the present invention. The power tool 1 of the present invention includes a body 10 , a rotating seat 20 and at least one spacer 30 .

The main body 10 includes a transmission mechanism 11, a driving member 12 and an axial hole 13. The driving member 12 is driven by the transmission mechanism 11 and can swing back and forth. The driving member 12 includes an inner surface. The axial hole 13 defines an axial direction. The rotating seat 20 is driven by the driving member 12. The rotating seat 20 is rotatably arranged in the axial hole 13. The rotating seat 20 includes an outer peripheral surface 21 surrounding the axial direction. The outer peripheral surface 21 of the rotating seat 20 faces the inner surface of the driving member 12. The at least one spacer 30 is arranged between the main body 10 and the outer peripheral surface of the rotating seat 20, so that the outer peripheral surface of the rotating seat 20 and the driving member 12 are spaced. Thereby, the at least one spacer 30 can significantly reduce the friction contact area of the rotating seat 20 when it rotates, and can stably maintain the rotating seat 20 at the center position of the shaft hole 13 without deviating to one side, thereby reducing friction loss during startup and operation, reducing temperature rise, increasing torque, and reducing power consumption.

The inner surface of the driving member 12 includes a first annular tooth portion 121, and the rotating seat 20 further includes a rotating shaft 22, a switching member 23 inserted in the rotating shaft 22, a first ratchet member 24 swingably arranged on the rotating shaft 22, and a first elastic abutment member 25 elastically abutting between the switching member 23 and the first ratchet member 24. Cutting the switching member 23 can drive the first elastic abutment member 25 to actuate the first ratchet member 24 to swing and engage with the first annular tooth portion 121 with different ends so that the rotating seat 20 can rotate unidirectionally around the axis, thereby switching the operating torque direction of the rotating seat 20 (clockwise or counterclockwise). Preferably, an annular groove 122 is respectively provided on two axially opposite sides of the driving member 12, and the at least one spacer includes two spacers 30, each of which is an annular body and is accommodated in one of the annular grooves 122, and the first annular tooth portion 121 is axially sandwiched between the two spacers 30, which can stably keep the rotating shaft 22 centered and not deviated, and keep the rotating shaft 22 and the first annular tooth portion 121 stably spaced.

In detail, the rotating seat 20 further includes a radially recessed first groove 26 and a first groove 27 extending around the axial direction. The first groove 26 and the first groove 27 are arranged opposite to each other in the radial direction. The first ratchet member 24 is accommodated in the first groove 26 and engages with the first annular tooth portion 121. The first groove 27 is radially spaced to face the first annular tooth portion 121.

In this embodiment, the power tool 1 further includes a ring 40, which is sleeved on the rotating shaft 22 and has a second ring tooth portion 41 on its inner surface. The ring 40 is, for example, assembled to the body 10 by being covered with a cover and restricted by a C-shaped snap. The rotating seat 20 further includes a second ratchet 28 movably disposed on the rotating shaft 22, and a second elastic abutment 29 elastically abutting between the switching member 23 and the second ratchet 28. Cutting the switching member 23 can drive the second elastic abutment 29 to actuate the second ratchet 28 to swing and engage with the second ring tooth portion 41 at different ends so that the rotating seat 20 can rotate unidirectionally around the axis. The rotating seat 20 further includes a second groove 26a recessed in the radial direction and a second groove 27a extending around the axial direction. The second groove 26a and the second groove 27a are arranged opposite to each other in the radial direction. The second ratchet 28 is accommodated in the second groove 26a and engages with the second annular tooth portion 41. The second groove 27a is radially spaced to face the second annular tooth portion 41. The first groove 27 and the second groove 27a further ensure that the outer peripheral surface 21 of the rotating seat 20 is spaced from the first annular tooth portion 121 and the second annular tooth portion 41 to avoid large-area contact and reduce friction.

In detail, the power tool 1 further includes a first pin 50, a second pin 60 and at least one positioning member 70 (e.g., a latch), and the rotating seat 20 further includes a first through hole 201, the first through hole 201 axially penetrates the rotating shaft 22 and has a fixed aperture, the first pin 50 is inserted in the first through hole 201 and pivots the first ratchet 24 to the rotating shaft 22. The rotating seat 20 further includes a second through hole 202, the second through hole 202 axially penetrates the rotating shaft 22 and has a fixed aperture, the second pin 60 is inserted in the second through hole 202 and pivots the second ratchet 28 to the rotating shaft 22. The hole wall of the shaft hole 13 is provided with at least one first positioning groove 131, and the outer peripheral surface of the ring member 40 is provided with at least one second positioning groove 42 opposite to the at least one first positioning groove 131. The at least one positioning member 70 is inserted into the at least one first positioning groove 131 and the at least one second positioning groove 42 to stably position the ring member 40, prevent the ring member 40 from slipping and rotating, and strengthen the engagement effect of the second ratchet member 28 and the ring member 40. The first through hole 201 and the second through hole 202 with a fixed aperture have the advantages of easy processing, convenient installation of the first ratchet member 24 and the second ratchet member 28, stable combination and greater structural strength.

Furthermore, the rotating shaft 22 includes an insertion hole 221, and the switch 23 is inserted into the insertion hole 221. An elastic member 80 is preferably provided between one end of the switch 23 and the bottom of the insertion hole 221. The elastic member 80 elastically pushes the switch 23 away from the bottom of the hole. In this way, the elastic member 80 can stably maintain the position of the switch 23, effectively ensuring the stable fit of the first ratchet member 24 and the first ring tooth portion 121, and the stable fit of the second ratchet member 28 and the second ring tooth portion 41.

The actual test results show that under the condition of using the same motor set (such as a pneumatic motor set), the speed of the power tool 1 of the invention is 460~480 RPM, the temperature rise after 2 minutes of operation is from 28°C to 36.2°C, and the torque is 55 (ft-lb); the speed of the power tool of the conventional power tool is 160~180 RPM, the temperature rise after 2 minutes of operation is from 28°C to 50.8°C, and the torque is 30 (ft-lb). It can be seen that the speed, temperature rise reduction, and output torque performance of the power tool of the invention are significantly better than those of the conventional power tool.

1: Power tool 10: Body 11: Transmission mechanism 12: Driving member 121: First ring tooth 122: Ring groove 13: Shaft hole 131: First positioning groove 20: Rotating seat 21: Outer peripheral surface 22: Rotating shaft 221: Socket 23: Switching member 24: First ratchet member 25: First spring-loaded member 26: First groove 26a: Second groove 27: First groove 27a: Second groove 28: Second ratchet member 29: Second spring-loaded member 30: Spacer 40: Ring member 41: Second ring tooth 42: Second positioning groove 50: first pin 60: second pin 70: positioning member 80: elastic member 201: first through hole 202: second through hole

Figure 1 is a three-dimensional diagram of an embodiment of the present invention. Figure 2 is an exploded diagram of an embodiment of the present invention. Figure 3 is a partial exploded diagram of an embodiment of the present invention. Figure 4 is an axial partial cross-sectional diagram of an embodiment of the present invention. Figure 5 is a radial partial cross-sectional diagram of an embodiment of the present invention. Figure 6 is another radial partial cross-sectional diagram of an embodiment of the present invention.

1: Power tools

10: Body

12: Drive parts

20: Rotating seat

23: Switching parts

Claims (10)

A power tool comprises: A body, comprising a transmission mechanism, a driving member and an axial hole, the driving member is driven by the transmission mechanism and can swing back and forth, the driving member comprises an inner surface, and the axial hole defines an axial direction; A rotating seat, driven by the driving member, rotatably arranged on the axial hole, comprising an outer peripheral surface surrounding the axial direction, the outer peripheral surface of the rotating seat facing the inner surface of the driving member; and At least one spacer, arranged between the body and the outer peripheral surface of the rotating seat, so that the outer peripheral surface of the rotating seat and the driving member are spaced. A power tool as described in claim 1, wherein the inner surface of the driving member includes a first annular tooth portion, and the rotating seat further includes a rotating shaft, a switching member inserted in the rotating shaft, a first ratchet member movably arranged on the rotating shaft, and a first elastic abutment member elastically abutting between the switching member and the first ratchet member, and cutting the switching member can drive the first elastic abutment member to activate the first ratchet member to swing so that different ends engage with the first annular tooth portion so that the rotating seat can rotate unidirectionally around the axis. A power tool as described in claim 2, wherein the rotating seat further includes a first radially recessed groove and a first groove extending around the axial direction, the first groove and the first groove are radially opposite to each other, the first ratchet member is accommodated in the first groove and engages with the first annular tooth portion, and the first groove radially faces the first annular tooth portion at intervals. The power tool as described in claim 3 further includes a first pin, and the rotating seat further includes a first through hole, the first through hole axially penetrates the rotating shaft and has a fixed hole diameter, the first pin is inserted into the first through hole and pivotally connects the first ratchet to the rotating shaft. A power tool as described in claim 4, wherein the rotating shaft includes a socket, the switching member is inserted into the socket, and an elastic member is provided between one end of the switching member and the bottom of the socket, and the elastic member pushes the switching member in a direction away from the bottom of the hole. A power tool as described in claim 4, wherein an annular groove is respectively provided on two axially opposite sides of the driving member, the at least one spacer includes two spacers, each of the spacers is accommodated in one of the annular grooves, and the first annular tooth portion is sandwiched between the two spacers. The power tool as described in any one of claims 2 to 6 further includes a ring member, which is sleeved on the rotating shaft and has a second annular tooth portion on its inner surface. The rotating seat further includes a second ratchet member movably arranged on the rotating shaft, and a second elastic abutment member elastically abutted between the switching member and the second ratchet member. Cutting the switching member can drive the second elastic abutment member to activate the second ratchet member to swing so that different ends engage with the second annular tooth portion so that the rotating seat can rotate unidirectionally around the axis. A power tool as described in claim 7, wherein the rotating seat further includes a second radially recessed groove and a second groove extending around the axial direction, the second groove and the second groove are radially opposite to each other, the second ratchet member is accommodated in the second groove and engages with the second annular tooth portion, and the second groove radially faces the second annular tooth portion at intervals. The power tool as described in claim 8 further includes a second pin, and the rotating seat further includes a second through hole, the second through hole axially penetrates the rotating shaft and has a fixed hole diameter, the second pin is inserted into the second through hole and pivotally connects the second ratchet to the rotating shaft. The power tool as described in claim 7 further includes at least one positioning member, the hole wall of the axial hole is provided with at least one first positioning groove, the outer peripheral surface of the ring is provided with at least one second positioning groove opposite to the at least one first positioning groove, and the at least one positioning member is embedded in the at least one first positioning groove and the at least one second positioning groove.

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