Power tools with adjustable angle

Abstract

An adjustable power tool includes a handle, an adjusting head, a transmission assembly, a clamping assembly, and an angle positioning assembly. The handle includes a connecting seat, a side cover mounted on one side of the connecting seat, a first support wall and a second support wall located on opposite sides of the connecting seat, the first support wall being formed in the side cover. The adjusting head is connected between the first support wall and the second support wall. The transmission assembly is mounted on the adjusting head. The clamping assembly includes at least one first disc spring disposed between the first support wall of the handle and the adjusting head. The angle positioning assembly is disposed between the adjusting head and the handle. The adjustable power tool has a simple structure, is easy to assemble, and can reduce costs, thereby reducing the selling price.

Description

[Technical Field]

[0001] This invention relates to a power tool, and more particularly to a power tool that can adjust the angle according to the user's needs. [Previous Technology]

[0002] Existing power tools, such as powered ratchet wrenches, mainly utilize pneumatic / electric motors to drive an actuator head, thereby tightening or loosening fasteners. Existing power tools mainly include a handle, a drive unit installed in the handle, and an actuator head installed at the front end of the handle and connected to the drive unit. Since the angle of the actuator head relative to the handle is fixed, it is difficult for users to directly hold existing power tools for operation when the working space is narrow or the working angle is special.

[0003] In order to improve the aforementioned problems, there is a power tool that can adjust the angle, which mainly includes a handle, an adjusting head, and a limiting assembly. The adjusting head is connected to the handle in an adjustable angle manner. The limiting assembly is connected between the handle and the adjusting head. The limiting assembly includes a limiting member that can rotate relative to the handle. The limiting member has a limiting part and an escape part. When the limiting part of the limiting member faces the adjusting head and is engaged with the adjusting head, the angle of the adjusting head relative to the handle is fixed. When the escape part of the limiting member faces the adjusting head, the engagement between the adjusting head and the limiting member is released, and the angle between the adjusting head and the handle can be adjusted.

[0004] However, the aforementioned power tools with adjustable angles have more parts, more complex structures, and more complicated assembly steps, which increases the overall cost, resulting in higher selling prices and reducing users' willingness to buy. [Summary of the Invention]

[0005] In view of the high overall cost of existing power tools with adjustable angles, which results in high selling prices and reduces users' willingness to purchase, the main objective of the present invention is to provide a power tool with lower cost and adjustable angle.

[0006] To achieve the above-mentioned objective, the power tool capable of adjusting angle provided by the present invention comprises: a handle, the handle comprising a body, a connecting seat, a side cover, a first support wall, and a second support wall, the connecting seat being formed at one end of the body, the side cover being mounted on one side of the connecting seat, the first support wall and the second support wall being located on opposite sides of the connecting seat, the first support wall being formed in the side cover; an adjusting head, the adjusting head being connected between the first support wall and the second support wall, two pivots being connected between the adjusting head and the first support wall and between the adjusting head and the second support wall respectively, the adjusting head being rotatable relative to the handle about the pivots; A transmission assembly mounted on the adjusting head, comprising a transmission member and an actuating head, the transmission member being rotatable relative to the handle and comprising a shaft extending into the handle and a drive end extending into the adjusting head, the actuating head being disposed on the adjusting head and being rotatable relative to the adjusting head by the drive end of the transmission member; a clamping assembly comprising at least one first disc spring disposed between a first support wall of the handle and the adjusting head; and an angle positioning assembly disposed between the adjusting head and the handle, the angle positioning assembly comprising a plurality of positioning grooves, a positioning member, and a positioning elastic member, the plurality of positioning grooves being angularly spaced and formed in one of the adjusting head and the handle, the positioning member being movably disposed in the other of the adjusting head and the handle and for engaging with one of the positioning grooves, the positioning elastic member pushing against the positioning member toward the positioning groove.

[0007] Since the clamping assembly includes at least one first disc spring disposed between the first support wall of the handle and the adjusting head, when the user applies force to turn the adjusting head, the at least one first disc spring can be compressed and the adjusting head can be rotated. The angle positioning assembly accurately positions the angle of the adjusting head relative to the handle. After the adjusting head is released, the at least one first disc spring returns to its original position and is clamped between the adjusting head and the first support wall of the handle, thus fixing the angle of the adjusting head relative to the handle.

[0008] The adjustable power tool of the present invention has a simple structure, is easy to assemble, reduces costs, thereby lowering the selling price and attracting users to purchase it.

Implementation Method

[0009] Please refer to Figures 1 to 5. A preferred embodiment of the power tool with adjustable angle provided by the present invention includes a handle 10, an adjusting head 20, a transmission assembly 30, a clamping assembly 40, and an angle positioning assembly 50.

[0010] Please refer to Figures 1 to 3 and Figure 5. The handle 10 includes a body 11, a connecting seat 12, a side cover 13, a first support wall 133, and a second support wall 123. The connecting seat 12 is formed at one end of the body 11, and the side cover 13 is installed on one side of the connecting seat 12. The first support wall 133 and the second support wall 123 are located on opposite sides of the connecting seat 12, and the first support wall 133 is formed on the side cover 13, and the second support wall 123 is integrally formed on the connecting seat 12.

[0011] Specifically, the body 11 is hollow and is used to accommodate a drive unit, which may be a pneumatic / electric motor. The connecting seat 12 includes a chamber 122 and a through hole 124. The chamber 122 is recessed at the top of the connecting seat 12, and the through hole 124 penetrates the bottom of the connecting seat 12 and connects the internal space of the body 11 and the chamber 122. The lower part of the side cover 13 is locked to the connecting seat 12, and the upper part of the side cover 13 protrudes from the connecting seat 12. The connecting seat 12 forms the first support wall 133. The side cover 13 is locked to the connecting seat 12 by a plurality of fasteners 15 arranged at intervals. Furthermore, the connecting seat 12 and the side cover 13 are respectively provided with a positioning protrusion 125 and a positioning recess 134 that interlock with each other to facilitate the positioning of the side cover 13. The handle 10 is also provided with a positioning pin 14, which extends into the side cover 13 and the connecting seat 12 and passes through the positioning protrusion 125 and the positioning recess 134.

[0012] Referring to Figures 1 to 5, the adjusting head 20 is mounted on the connecting seat 12 of the handle 10 and connected between the first support wall 133 and the second support wall 123. Two pivots 25, positioned opposite each other, are respectively connected between the adjusting head 20 and the first support wall 133 and between the adjusting head 20 and the second support wall 123. The adjusting head 20 can rotate relative to the handle 10 with the two pivots 25 as the center. In a preferred embodiment of the present invention, the bottom end of the adjusting head 20 extends into the chamber 122 of the connecting seat 12. The two pivots 25 are respectively protruding on opposite sides of the adjusting head 20 and extend into the first support wall 133 and the second support wall 123 respectively. The two pivots 25 are integrated with the adjusting head 20. The fasteners 15 are locked at a position lower than the pivots 25. In other embodiments, the two pivots can respectively protrude from the first support wall and the second support wall.

[0013] Please refer to Figures 4, 5, and 9. The transmission assembly 30 is movably mounted on the adjusting head 20 and includes a transmission member 31 and an actuating head 33. The transmission member 31 is connected to the drive unit and can be driven by the drive unit to rotate relative to the handle 10. The transmission member 31 includes a shaft 311 extending into the handle 10 and connected to the drive unit, and a drive end 313 extending into the adjusting head 20. The adjusting head 20 can move relative to the transmission member 31. The actuating head 33 is mounted on the adjusting head 20 and can be driven by the drive end 313 of the transmission member 31 to move relative to the adjusting head 20.

[0014] Specifically, the adjusting head 20 includes a transmission chamber 21, a guide port 22, an assembly hole 23, and a through hole 24. The transmission chamber 21 is formed inside the adjusting head 20. The guide port 22 is curved and is formed at the bottom of the adjusting head 20 and communicates with the transmission chamber 21. The assembly hole 23 is formed at the top of the adjusting head 20 and communicates with the transmission chamber 21. The through hole 24 penetrates through the opposite sides of the adjusting head 20 and communicates with the transmission chamber 21. The transmission component 31 can be inserted into the transmission chamber 21 of the adjustment head 20 through the assembly hole 23. The shaft 311 of the transmission component 31 can pass through the guide port 22 out of the adjustment head 20 and through the through hole 124 of the connecting seat 12, and extend into the body 11 of the handle 10, and connect with the drive unit. The drive end 313 of the transmission component 31 is located in the transmission chamber 21. Furthermore, the adjustment head 20 also includes two cover plates 27 respectively covering the guide port 22 and the assembly hole 23.

[0015] The drive end 313 of the transmission component 31 is provided with an eccentric rod 314 and a slider 315. The slider 315 is sleeved on the eccentric rod 314 and can slide up and down along the eccentric rod 314. The actuating head 33 is movably installed in the adjusting head 20 and can be driven by the drive end 313 of the transmission component 31 to actuate. The actuating head 33 mainly includes a transmission block 34 and a ratchet assembly 35. The transmission block 34 is provided in the transmission chamber 21 of the adjusting head 20 and can reciprocate relative to the adjusting head 20. The end of the transmission block 34 facing the transmission component 31 is recessed with a push groove 342. The transmission block 34 is provided with a receiving hole 343 corresponding to the through hole 24 of the adjustment head 20. The driving end 313 of the transmission member 31 extends into the actuating groove 342. When the transmission member 31 rotates, the slider 315 on the eccentric rod 314 can push the transmission block 34, causing the transmission block 34 to swing back and forth relative to the adjustment head 20. The ratchet assembly 35 is installed in the receiving hole 343 of the transmission block 34 and can extend out of the adjustment head 20 through the through hole 24. The ratchet assembly 35 can be driven by the transmission block 34 to rotate relative to the adjustment head 20. The structure and operation of the ratchet assembly 35 are existing technologies and will not be described in detail here.

[0016] Please refer to Figures 2, 3, 5, and 6. The clamping assembly 40 includes at least one first disc spring 41 disposed between the first support wall 133 and the adjusting head 20. The adjusting head 20 can be clamped by the axial clamping force of the first disc spring 41, thus fixing the angle between the adjusting head 20 and the handle 10. Preferably, the clamping assembly 40 also includes at least one second disc spring 42 disposed between the second support wall 123 of the connecting seat 12 and the adjusting head 20. The stability of the support is increased by the first disc spring 41 and the second disc spring 42 located on opposite sides of the adjusting head 20. Furthermore, the clamping assembly 40 also includes a wave washer 43 disposed between the first support wall 133 and the adjusting head 20. The wave washer 43 can be positioned between the adjusting head 20 and the at least one first disc spring 41, thus preventing loosening, damping vibration, and adjusting the gap. The first disc spring 41 and the wave washer 43 are sleeved on the pivot 25 between the first support wall 133 and the adjusting head 20, and the second disc spring 42 is sleeved on the pivot 25 between the second support wall 123 and the adjusting head 20.

[0017] In this preferred embodiment, the number of at least one first disc spring 41 is one, each first disc spring 41 is conical with a bottom end and a top end, the bottom end of the first disc spring 41 faces the first support wall 133, and the number of at least one second disc spring 42 is one, the bottom end of the second disc spring 42 faces the second support wall 123. In other embodiments, the at least one first disc spring 41 may include a plurality of stacked first disc springs 41, and the at least one second disc spring 42 may include a plurality of stacked second disc springs 42. By stacking the first disc springs 41 / second disc springs 42, their load is increased. The plurality of first disc springs 41 / second disc springs 42 can be stacked in the same direction, stacked in opposite directions, or stacked in both directions, etc., for various applications.

[0018] Please refer to Figures 3, 5, and 7. The angle positioning group 50 is disposed between the adjusting head 20 and the handle 10. The angle positioning group 50 includes a plurality of positioning grooves 52, a positioning member 51, and a positioning elastic member 53. The plurality of positioning grooves 52 are arranged at angular intervals in one of the adjusting head 20 and the handle 10. The positioning member 51 is movably disposed in the other of the adjusting head 20 and the handle 10 and can be engaged with one of the positioning grooves 52. The positioning elastic member 53 pushes the positioning member 51 toward the plurality of positioning grooves 52.

[0019] In a preferred embodiment of the present invention, the plurality of positioning grooves 52 are formed in the adjusting head 20, the connecting seat 12 is recessed with a mounting groove 126, the positioning member 51 extends into the mounting groove 126, the positioning elastic member 53 is placed in the mounting groove 126 and pushes the positioning member 51 toward each positioning groove 52.

[0020] Please refer to Figures 5, 7, and 8. When adjusting the angle of the adjusting head 20, the user can directly apply force to turn the adjusting head 20. The first disc spring 41 located between the first support wall 133 and the adjusting head 20 and the second disc spring 42 located between the second support wall 123 and the adjusting head 20 can be compressed, releasing the tightness between the adjusting head 20 and the handle 10, so that the adjusting head 20 can be rotated. During the rotation of the adjusting head 20, the positioning member 51 can provide a segmented angle positioning effect through the compression and rebound of the positioning elastic member 53 and through different positioning grooves 52. The adjusting head 20 can pivot relative to the connecting seat 12 according to the set angle and accurately position the angle of the adjusting head 20 relative to the handle 10.

[0021] When the user releases the adjustment head 20, the first disc spring 41 and the second disc spring 42 return to their original positions and are tightly supported between the adjustment head 20 and the first support wall 133 and the adjustment head 20 and the second support wall 123, fixing the angle of the adjustment head 20 relative to the handle 10.

[0022] Please refer to Figures 9 to 11. When the adjustment head 20 rotates, the actuating head 33 pivots relative to the connecting seat 12 as the adjustment head 20 rotates. The angle of the driving end 313 of the transmission member 31 relative to the connecting seat 12 does not change. The eccentric rod 314 of the transmission member 31 extends into the actuating groove 342 of the transmission block 34. Since the slider 315 can move along the eccentric rod 314, it can be ensured that the actuating head 33 can still be driven by the transmission member 31 after pivoting.

[0023] Utilizing the above-mentioned technical features, the adjustable power tool of the present invention has a simple structure, is easy to assemble, can reduce costs, thereby reducing the selling price and attracting users to purchase it. In addition, since the adjusting head 20 and the handle 10 are pressed together by the first / second disc springs 41 / 42, the pressing force can be adjusted by adjusting the number of the first / second disc springs 41 / 42. Furthermore, when the first / second disc springs 41 / 42 are fatigued or the pressing force they provide is insufficient, they are easy to repair and replace. [Simplified Explanation of the Diagram]

[0024] Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is an exploded perspective view of a preferred embodiment of the present invention. Figure 3 is another exploded perspective view of a preferred embodiment of the present invention. Figure 4 is an exploded perspective view of a transmission assembly of a preferred embodiment of the present invention. Figure 5 is a partial cross-sectional front view of a preferred embodiment of the present invention. Figure 6 is an enlarged view of Figure 5. Figure 7 is a partial cross-sectional side view of a preferred embodiment of the present invention. Figure 8 is a schematic diagram of the angle adjustment operation of a preferred embodiment of the present invention. Figure 9 is a partial cross-sectional side view of a preferred embodiment of the present invention. Figure 10 is another schematic diagram of the angle adjustment operation of a preferred embodiment of the present invention. Figure 11 is a perspective view of a preferred embodiment of the present invention after angle adjustment.

Claims

1. An adjustable power tool, comprising: a handle, the handle including a body, a connecting seat, a side cover, a first support wall, and a second support wall, the connecting seat being formed at one end of the body, the side cover being mounted on one side of the connecting seat, the first support wall and the second support wall being located on opposite sides of the connecting seat, the first support wall being formed in the side cover; an adjusting head connected between the first support wall and the second support wall, two pivots positioned opposite each other being connected between the adjusting head and the first support wall and between the adjusting head and the second support wall, the adjusting head being rotatable relative to the handle about the pivots; A transmission assembly mounted on the adjusting head, comprising a transmission member and an actuating head, the transmission member being rotatable relative to the handle, the transmission member comprising a shaft extending into the handle and a drive end extending into the adjusting head, the actuating head being disposed on the adjusting head and being rotatable relative to the adjusting head by the drive end of the transmission member; a clamping assembly comprising at least one first disc spring disposed between a first support wall of the handle and the adjusting head; and an angle positioning assembly disposed between the adjusting head and the handle, the angle positioning assembly comprising a plurality of positioning slots, a positioning member, and a positioning elastic member, the plurality of positioning slots being angularly spaced in one of the adjusting head and the handle, the positioning member being movably disposed in the other of the adjusting head and the handle and for engaging with one of the positioning slots, the positioning elastic member pushing against the positioning member toward the positioning slot.

2. The power tool capable of adjusting angle as described in claim 1, wherein the clamping assembly includes at least one second disc spring disposed between the second support wall of the handle and the adjusting head.

3. The power tool capable of adjusting angle as described in claim 2, wherein the clamping assembly includes a corrugated washer disposed between the first support wall of the handle and the adjusting head.

4. The power tool capable of adjusting angle as described in claim 3, wherein the at least one first disc spring and the wave washer are sleeved on the pivot between the first support wall and the adjusting head; and the at least one second disc spring is sleeved on the pivot between the second support wall and the adjusting head.

5. An angle-adjustable power tool as described in any one of claims 1 to 4, wherein the lower part of the side cover is locked to the connecting seat, the upper part of the side cover protrudes from the connecting seat and forms the first support wall; the second support wall is integrally formed on the connecting seat.

6. The power tool capable of adjusting angle as described in claim 5, wherein the two pivots are respectively protruding from opposite sides of the adjusting head and respectively extend into the first support wall and the second support wall.

7. The power tool with adjustable angle as described in claim 5, wherein the connecting seat and the side cover are respectively provided with a positioning protrusion and a positioning recess that interlock with each other.

8. An adjustable power tool as described in claim 7, wherein the handle is provided with a locating pin that extends into the side cover and the connecting seat.

9. The power tool capable of adjusting angle as described in claim 8, wherein the drive end of the transmission member is provided with an eccentric rod and a slider sleeved on the eccentric rod and capable of sliding along the eccentric rod.

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