Auxiliary handle assembly for power tools

Abstract

The application provides an auxiliary handle assembly for a power tool, which comprises a handle piece, a first clamping mechanism, a second clamping mechanism, a screw rod and a clamp. The first clamping mechanism comprises a first transmission piece and a first nut mounted on the first transmission piece, the second clamping mechanism comprises a second transmission piece and a second nut mounted on the second transmission piece, the first outer thread of the screw rod is matched with the first inner thread of the first nut, and the second outer thread of the screw rod is matched with the second inner thread of the second nut. The screw rod is configured to drive the first nut and the second nut to move towards each other, the first nut and the second nut drive the first transmission piece and the second transmission piece to move towards each other, and the first clamping mechanism and the second clamping mechanism drive the clamp to clamp the power tool. The screw rod is configured to drive the first nut and the second nut to move away from each other, the first nut and the second nut drive the first transmission piece and the second transmission piece to move away from each other, and the clamp releases the power tool.

Description

Technical Field

[0001] This application relates to the field of power tools, and more particularly to an auxiliary handle assembly for power tools, especially handheld power tools such as electric drills and hammer drills. Background Technology

[0002] Typically, auxiliary handle assemblies for power tools include a handle, a clamp, a nut, and a screw. The screw and nut drive the clamp to grip the power tool. The screw includes a first thread, and the nut includes a second thread; the first and second threads mate. The screw has a centerline; when the screw rotates around its centerline, the nut or screw moves a distance L = P along the centerline, where P is the thread pitch. The clamping speed is slow.

[0003] Therefore, it is necessary to provide a new auxiliary handle assembly for power tools. Summary of the Invention

[0004] This application provides an auxiliary handle assembly for power tools with fast clamping speed.

[0005] Specifically, this application provides an auxiliary handle assembly for power tools. The auxiliary handle assembly includes a handle, a first clamping mechanism, a second clamping mechanism, a screw, and a clamp. The handle includes a first side and a second side disposed opposite to each other. The clamp includes a body and a first free end and a second free end extending from both ends of the body. The first free end and the second free end are located between the first clamping mechanism and the second clamping mechanism. The first clamping mechanism includes a first transmission member mounted on the first side and a first nut mounted on the first transmission member. The first nut includes a first internal thread. The second clamping mechanism includes a second transmission member mounted on the second side and a first nut mounted on the second side. The transmission component has a second nut, which includes a second internal thread. The screw includes a first external thread and a second external thread, the first external thread engaging with the first internal thread, and the second external thread engaging with the second internal thread. The screw is configured to drive the first nut and the second nut to move towards each other, the first nut and the second nut driving the first transmission component and the second transmission component to move towards each other, and the first clamping mechanism and the second clamping mechanism driving the clamp to clamp the power tool. Alternatively, the screw can be configured to drive the first nut and the second nut to move away from each other, the first nut and the second nut driving the first transmission component and the second transmission component to move away from each other, and the clamp releasing the power tool.

[0006] Furthermore, the number of thread starts of the first external thread is the same as the number of thread starts of the second external thread, and the pitch of the first external thread is the same as the pitch of the second external thread.

[0007] Furthermore, the screw has a centerline, and when the screw rotates around the centerline for one revolution, the total distance L that the first nut and the second nut move along the centerline is L = 2 × n × P, where n is the number of thread starts and P is the pitch.

[0008] Furthermore, n ≥ 2.

[0009] Furthermore, the first transmission component is provided with a first through groove, and the first nut is installed in the first through groove; the second transmission component is provided with a second through groove, and the second nut is installed in the second through groove.

[0010] Furthermore, the first clamping mechanism further includes a first clamping member, which is located on the side of the first transmission member near the first free end, and the first clamping member abuts against the first free end, and the first transmission member abuts against the first clamping member; the second clamping mechanism further includes a second clamping member, which is located on the side of the second transmission member near the second free end, and the second clamping member abuts against the second free end, and the second transmission member abuts against the second clamping member; the first clamping member is provided with a first through groove, and the second clamping member is provided with a second through groove; the first free end is provided with a first through hole, and the second free end is provided with a second through hole; the first through groove, the first through groove, the first through hole, the second through hole, the second through groove, and the second through groove are aligned along the axis of the screw and allow the screw to pass through them.

[0011] Furthermore, the first free end includes a first base and a first retaining portion bent from the first base, the first clamping member is provided with a first retaining groove, and the first retaining portion is retained in the first retaining groove; the second free end includes a second base and a second retaining portion bent from the second base, the second clamping member is provided with a second retaining groove, and the second retaining portion is retained in the second retaining groove.

[0012] Furthermore, the first clamping member includes a first main body portion and a first lifting portion extending from the first main body portion, the first main body portion abutting against the first free end portion, and the first lifting portion abutting against the main body portion; the second clamping member includes a second main body portion and a second lifting portion extending from the second main body portion, the second main body portion abutting against the second free end portion, and the second lifting portion abutting against the main body portion.

[0013] Furthermore, the first side portion is provided with a first mounting hole, and the first transmission member is mounted in the first mounting hole; the second side portion is provided with a second mounting hole, and the second transmission member is mounted in the second mounting hole; the first side portion includes a first limiting rib, the first limiting rib protruding from the hole wall of the first mounting hole, and the first transmission member is provided with a first limiting groove recessed from its outer surface, the first limiting rib cooperating with the first limiting groove; the second side portion includes a second limiting rib, the second limiting rib protruding from the hole wall of the second mounting hole, and the second transmission member is provided with a second limiting groove recessed from its outer surface, the second limiting rib cooperating with the second limiting groove.

[0014] Furthermore, the first transmission member includes a first stop portion located on the side of the first side portion away from the first free end portion, and the first stop portion cooperates with the first side portion; the second transmission member includes a second stop portion located on the side of the second side portion away from the second free end portion, and the second stop portion cooperates with the second side portion.

[0015] In this application, the screw includes a first external thread and a second external thread, the first nut is mounted on the first transmission component and includes a first internal thread, the second nut is mounted on the second transmission component and includes a second internal thread, the first external thread mates with the first internal thread, and the second external thread mates with the second internal thread; the screw can drive the first nut and the second nut to move rapidly toward each other, the first nut and the second nut drive the first transmission component and the second transmission component to move toward each other, and the first clamping mechanism and the second clamping mechanism drive the clamp to clamp the power tool; the screw can also drive the first nut and the second nut to move rapidly away from each other, the first nut and the second nut drive the first transmission component and the second transmission component to move away from each other, and the clamp releases the power tool under its own elastic force. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the power tool and auxiliary handle assembly of this application.

[0017] Figure 2 yes Figure 1 The diagram shows a power tool and auxiliary handle assembly from another perspective.

[0018] Figure 3 yes Figure 2 The diagram shows another view of the power tool and auxiliary handle assembly.

[0019] Figure 4 yes Figure 3 The diagram shows the structure of the auxiliary handle assembly.

[0020] Figure 5 yes Figure 4The cross-sectional view of the auxiliary handle assembly shown.

[0021] Figure 6 yes Figure 4 An exploded perspective view of the auxiliary handle assembly shown.

[0022] Figure 7 yes Figure 6 The diagram shows a cross-sectional view of the first transmission component (second transmission component) and the first nut (second nut), wherein the first nut (second nut) is installed in the first through groove (second through groove) of the first transmission component (second transmission component).

[0023] Figure 8 yes Figure 6 The diagram shows the structure of the screw. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0025] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise stated, terms such as "front," "rear," "lower," and / or "upper" are for ease of description only and are not limited to a location or spatial orientation. Terms such as "comprising" or "including" mean that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] Please combine Figures 1 to 8This application provides an auxiliary handle assembly 100 for a power tool 200. The auxiliary handle assembly 100 includes a first clamping mechanism 10, a second clamping mechanism 20, a handle 30, a screw 40, and a clamp 50. The handle 30 includes a first side portion 31 and a second side portion 32 disposed opposite to each other. The clamp 50 includes a body portion 53 and a first free end portion 51 and a second free end portion 52 extending from both ends of the body portion 53. The first free end portion 51 and the second free end portion 52 are located between the first clamping mechanism 10 and the second clamping mechanism 20. The first free end portion 51 has a first through hole 510, and the second free end portion 52 has a second through hole 520, which are disposed opposite to each other. The power tool 200 can be a handheld power tool such as an electric drill, electric hammer, angle grinder, or electric pick, and is not limited thereto.

[0027] The first clamping mechanism 10 includes a first transmission member 11, a first nut 12, and a first clamping member 13. The first transmission member 11 is mounted on the first side portion 31. The first nut 12 is mounted on the first transmission member 11; specifically, the first transmission member 11 has a first through groove 110, and the first nut 12 is mounted in the first through groove 110. The first clamping member 13 is located on the side of the first transmission member 11 near the first free end 51, and the first clamping member 13 abuts against the first free end 51, while the first transmission member 11 abuts against the first clamping member 13. The first clamping member 13 has a first through groove 130. The second clamping mechanism 20 includes a second transmission member 21, a second nut 22, and a second clamping member 23. The second transmission member 21 is mounted on the second side portion 32. The second nut 22 is mounted on the second transmission member 21; specifically, the second transmission member 21 has a second through groove 210, and the second nut 22 is mounted in the second through groove 210. The second clamping member 23 is located on the side of the second transmission member 21 near the second free end 52. The second clamping member 23 abuts against the second free end 52, and the second transmission member 21 abuts against the second clamping member 23. The second clamping member 23 is provided with a second through groove 230. The screw 40 has an axis O. The first through groove 110, the first through groove 130, the first through hole 510, the second through hole 520, the second through groove 230, and the second through groove 210 are aligned along the axis O of the screw 40. The screw 40 passes through the first through groove 110, the first through groove 130, the first through hole 510, the second through hole 520, the second through groove 230, and the second through groove 210. The screw 40 includes a first external thread 41 and a second external thread 42, the first nut 12 includes a first internal thread 120, and the second nut 22 includes a second internal thread 220. The first external thread 41 and the first internal thread 120 are engaged, and the second external thread 42 and the second internal thread 220 are engaged. The screw 40 is configured to drive the first nut 12 and the second nut 22 to move toward each other. The first nut 12 and the second nut 22 drive the first transmission member 11 and the second transmission member 21 to move toward each other. The first clamping mechanism 10 and the second clamping mechanism 20 drive the clamp 50 to clamp the power tool 200. Specifically, the screw 40 is configured to drive the first nut 12 and the second nut 22 to move toward each other along the axis O of the screw 40. The first nut 12 and the second nut 22 drive the first transmission member 11 and the second transmission member 21 to move toward each other along the axis O of the screw 40. The first transmission member 11 and the second transmission member 21 drive the first clamping member 13 and the second clamping member 23 to move toward each other along the axis O of the screw 40. The first clamping member 13 and the second clamping member 23 drive the clamp 50 to clamp the power tool 200.The screw 40 is configured to drive the first nut 12 and the second nut 22 to move in opposite directions. The first nut 12 and the second nut 22 drive the first transmission member 11 and the second transmission member 21 to move in opposite directions. The clamp 50 releases the power tool 200 under its own elastic force. Specifically, the screw 40 is configured to drive the first nut 12 and the second nut 22 to move in opposite directions along the axis O of the screw 40. The first nut 12 and the second nut 22 drive the first transmission member 11 and the second transmission member 21 to move in opposite directions along the axis O of the screw 40. The clamp 50 releases the power tool 200 under its own elastic force. The clamp 50 drives the first clamping member 13 and the second clamping member 23 to move in opposite directions along the axis O of the screw 40.

[0028] When the screw 40 includes a first external thread 41 and a second external thread 42, the pitch of the first external thread 41 and the pitch of the second external thread 42 must be the same; otherwise, stable operation cannot be guaranteed. In this application, since the screw 40 includes a first external thread 41 and a second external thread 42, the pitch of the first external thread 41 and the pitch of the second external thread 42 are the same, and the number of thread starts of the first external thread 41 and the number of thread starts of the second external thread 42 are the same. When the screw 40 rotates around the axis O for one revolution, the total distance L that the first nut 12 and the second nut 22 move along the axis O is L = 2 × n × P, where n is the number of thread starts and P is the pitch; where n ≥ 2. In this embodiment, n = 3. With this design, the screw 40 can drive the first nut 12 and the second nut 22 to move rapidly towards each other along the axis O of the screw 40. The first nut 12 drives the first transmission component 11, and the second nut 22 drives the second transmission component 21. The first nut 12 and the second nut 22 drive the first transmission component 11 and the second transmission component 21 to move towards each other along the axis O of the screw 40. The first transmission component 11 and the second transmission component 21 drive the first clamping component 13 and the second clamping component 23 to move towards each other along the axis O of the screw 40. The first clamping component 13 and the second clamping component 23 drive the clamping clamp. The screw 40 clamps the power tool 200; the screw 40 can drive the first nut 12 and the second nut 22 to move rapidly in opposite directions along the axis O of the screw 40. The first nut 12 drives the first transmission component 11, and the second nut 22 drives the second transmission component 21. The first nut 12 and the second nut 22 drive the first transmission component 11 and the second transmission component 21 to move in opposite directions along the axis O of the screw 40. The clamp 50 releases the power tool 200 under its own elastic force. The clamp 50 drives the first clamping component 13 and the second clamping component 23 to move in opposite directions along the axis O of the screw 40.

[0029] The first free end portion 51 includes a first base 511 and a first holding portion 512 bent from the first base 511. The first clamping member 13 is provided with a first holding groove 133, and the first holding portion 512 is fixed in the first holding groove 133. The second free end portion 52 includes a second base 521 and a second holding portion 522 bent from the second base 521. The second clamping member 23 is provided with a second holding groove 233, and the second holding portion 522 is fixed in the second holding groove 233. The first clamping member 13 includes a first main body portion 131 and a first lifting portion 132 extending from the first main body portion 131. The first main body portion 131 abuts against the first free end portion 51, and the first lifting portion 132 abuts against the main body portion 53. The second clamping member 23 includes a second main body portion 231 and a second lifting portion 232 extending from the second main body portion 231. The second main body portion 231 abuts against the second free end portion 52, and the second lifting portion 232 abuts against the main body portion 53. Specifically, the first retaining groove 133 is disposed in the first main body portion 131, and the second retaining groove 233 is disposed in the second main body portion 231.

[0030] The first side portion 31 is provided with a first mounting hole 310, and the first transmission member 11 is mounted in the first mounting hole 310. The first side portion 31 includes a first limiting rib 311, which protrudes from the hole wall of the first mounting hole 310. The first transmission member 11 is provided with a first limiting groove 111 recessed from its outer surface, and the first limiting rib 311 cooperates with the first limiting groove 111. The first transmission member 11 includes a first stop portion 112, which is located on the side of the first side portion 31 opposite to the first free end 51, and the first stop portion 112 cooperates with the first side portion 31. The second side portion 32 is provided with a second mounting hole 320, and the second transmission member 21 is mounted in the second mounting hole 320. The second side portion 32 includes a second limiting rib 321, which protrudes from the wall of the second mounting hole 320. The second transmission member 21 is provided with a second limiting groove 211 recessed from its outer surface, and the second limiting rib 321 cooperates with the second limiting groove 211. The second transmission member 21 includes a second stop portion 212, which is located on the side of the second side portion 32 opposite to the second free end portion 52, and the second stop portion 212 cooperates with the second side portion 32.

[0031] When the clamp 50 is needed to clamp the power tool 200, the screw 40 is rotated, and the first nut 12 and the second nut 22 rotate synchronously. The first nut 12 forces the first transmission member 11 to move, and the second nut 22 forces the second transmission member 21 to move. The first transmission member 11 and the second transmission member 21 move towards each other synchronously along the axis O of the screw 40. The first transmission member 11 forces the first clamping member 13 to move, and the second transmission member 21 forces the second clamping member 23 to move. The first clamping member 13 and the second clamping member 23 move towards each other synchronously along the axis O of the screw 40. The first clamping member 13 and the second clamping member 23 together squeeze the clamp 50, thereby clamping the power tool 200. When the clamp 50 needs to loosen the power tool 200, the screw 40 is rotated, and the first nut 12 and the second nut 22 rotate synchronously. The first nut 12 forces the first transmission component 11 to move, and the second nut 22 forces the second transmission component 21 to move. The first transmission component 11 and the second transmission component 21 move synchronously in opposite directions along the axis O of the screw 40. When the first transmission component 11 and the second transmission component 21 move synchronously in opposite directions, the clamp 50 loosens the power tool 200 under its own elastic force. The clamp 50 drives the first clamping component 13 and the second clamping component 23 to move synchronously in opposite directions along the axis O of the screw 40. It should be noted that, because the first limiting rib 311 of the first side portion 31 of the handle 30 engages with the first limiting groove 111 of the first transmission member 11, the first transmission member 11 cannot rotate under the drive of the first nut 12, and can only move along the axis O of the screw 40; similarly, because the second limiting rib 321 of the second side portion 32 of the handle 30 engages with the second limiting groove 211 of the second transmission member 21, the second transmission member 21 cannot rotate under the drive of the second nut 22, and can only move along the axis O of the screw 40. Furthermore, the first transmission member 11, the second transmission member 21, the first clamping member 13, the second clamping member 23, and the clamp 50 can rotate synchronously around the axis O of the screw 40, thereby adjusting the angle of the handle 30 during operation.

[0032] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An auxiliary handle assembly for power tools, characterized in that, The auxiliary handle assembly includes a handle, a first clamping mechanism, a second clamping mechanism, a screw, and a clamp. The handle includes a first side and a second side disposed opposite to each other. The clamp includes a body and a first free end and a second free end extending from both ends of the body. The first free end and the second free end are located between the first clamping mechanism and the second clamping mechanism. The first clamping mechanism includes a first transmission member mounted on the first side and a first nut mounted on the first transmission member. The first nut includes a first internal thread. The second clamping mechanism includes a second transmission member mounted on the second side and a second nut mounted on the second transmission member. The nut includes a second internal thread, and the screw includes a first external thread and a second external thread, the first external thread engaging with the first internal thread, and the second external thread engaging with the second internal thread; the screw is configured to drive the first nut and the second nut to move towards each other, the first nut and the second nut driving the first transmission member and the second transmission member to move towards each other, and the first clamping mechanism and the second clamping mechanism driving the clamp to clamp the power tool; the screw is also configured to drive the first nut and the second nut to move away from each other, the first nut and the second nut driving the first transmission member and the second transmission member to move away from each other, and the clamp releasing the power tool.

2. The auxiliary handle assembly according to claim 1, characterized in that, The number of thread starts of the first external thread is the same as the number of thread starts of the second external thread, and the pitch of the first external thread is the same as the pitch of the second external thread.

3. The auxiliary handle assembly according to claim 2, characterized in that, The screw has a centerline. When the screw rotates around the centerline, the total distance L that the first nut and the second nut move along the centerline is L = 2 × n × P, where n is the number of thread starts and P is the pitch.

4. The auxiliary handle assembly according to claim 3, characterized in that, n ≥2。 5. The auxiliary handle assembly according to claim 1, characterized in that, The first transmission component is provided with a first through groove, and the first nut is installed in the first through groove; the second transmission component is provided with a second through groove, and the second nut is installed in the second through groove.

6. The auxiliary handle assembly according to claim 5, characterized in that, The first clamping mechanism further includes a first clamping member, which is located on the side of the first transmission member near the first free end. The first clamping member abuts against the first free end, and the first transmission member abuts against the first clamping member. The second clamping mechanism further includes a second clamping member, which is located on the side of the second transmission member near the second free end. The second clamping member abuts against the second free end, and the second transmission member abuts against the second clamping member. The first clamping member has a first through groove, and the second clamping member has a second through groove. The first free end has a first through hole, and the second free end has a second through hole. The first through groove, the first through groove, the first through hole, the second through hole, the second through groove, and the second through groove are aligned along the axis of the screw and allow the screw to pass through them.

7. The auxiliary handle assembly according to claim 6, characterized in that, The first free end includes a first base and a first retaining portion bent from the first base. The first clamping member is provided with a first retaining groove, and the first retaining portion is retained in the first retaining groove. The second free end includes a second base and a second retaining portion bent from the second base. The second clamping member is provided with a second retaining groove, and the second retaining portion is retained in the second retaining groove.

8. The auxiliary handle assembly according to claim 6, characterized in that, The first clamping member includes a first main body portion and a first lifting portion extending from the first main body portion, the first main body portion abutting against the first free end portion, and the first lifting portion abutting against the main body portion; the second clamping member includes a second main body portion and a second lifting portion extending from the second main body portion, the second main body portion abutting against the second free end portion, and the second lifting portion abutting against the main body portion.

9. The auxiliary handle assembly according to claim 1, characterized in that, The first side portion is provided with a first mounting hole, and the first transmission component is mounted in the first mounting hole; the second side portion is provided with a second mounting hole, and the second transmission component is mounted in the second mounting hole; the first side portion includes a first limiting rib, the first limiting rib protruding from the hole wall of the first mounting hole, and the first transmission component is provided with a first limiting groove recessed from its outer surface, the first limiting rib cooperating with the first limiting groove; the second side portion includes a second limiting rib, the second limiting rib protruding from the hole wall of the second mounting hole, and the second transmission component is provided with a second limiting groove recessed from its outer surface, the second limiting rib cooperating with the second limiting groove.

10. The auxiliary handle assembly according to claim 9, characterized in that, The first transmission member includes a first stop portion located on the side of the first side portion away from the first free end portion, and the first stop portion cooperates with the first side portion; the second transmission member includes a second stop portion located on the side of the second side portion away from the second free end portion, and the second stop portion cooperates with the second side portion.

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