CN211541097U

CN211541097U - Torque output tool

Info

Publication number: CN211541097U
Application number: CN202020092716.XU
Authority: CN
Inventors: 李春蕊
Original assignee: Nanjing Deshuo Industrial Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-09-22
Anticipated expiration: 2030-01-16

Abstract

The utility model discloses a torque output instrument, include: the motor, the gear box and the main shaft are sequentially arranged from back to front along the first axial direction; a planetary reduction structure is arranged in the gear box and comprises a sun gear, a planet gear and an inner gear ring; the torsion adjusting ring can move back and forth on the gear box; the elastic piece support is connected with the torque adjusting ring; the elastic piece is arranged on the elastic piece support; the rear end of the gear shifting pin is abutted against the front end of the inner gear ring so as to tightly prop up the inner gear ring, and the front end of the gear shifting pin is abutted against the elastic piece; the elastic part support is at least partially sleeved on the torsion adjusting ring, so that at least part of the elastic part support and the torsion adjusting ring are overlapped in the radial direction of the first axis; the elastic piece is arranged in the axial projection of the torsion adjusting ring in the first axial direction. The elastic part support is nested on the torsion adjusting ring, so that the axial length of the whole machine can be shortened; the elastic piece is arranged in the axial projection of the torsion adjusting ring, so that the radial size of the whole machine can be reduced.

Description

Torque output tool

Technical Field

The utility model relates to an electric tool technical field especially relates to a torque output instrument.

Background

The torque output tool is an electric tool which uses a motor as a driving piece, and transmits the torque of the motor to a main shaft at the front end after the torque is subjected to speed reduction transmission through a gear box, so that the main shaft rotates, and the output of the torque is realized. A torsion adjusting mechanism is arranged on a common torsion output tool and acts on an inner gear ring of a gear box to adjust the torsion output by a main shaft.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a torque output instrument to the not compact axial and the great problem of radial dimension that leads to torque output instrument of cooperation of each part among the torque adjustment mechanism of torque output instrument among the solution prior art.

To achieve the purpose, the utility model adopts the following technical proposal:

a torque output tool, comprising:

the motor, the gear box and the main shaft are sequentially arranged from back to front along the first axial direction;

the gearbox is internally provided with a planetary reduction structure, and the planetary reduction structure comprises a sun gear, a planet gear and an inner gear ring;

the torsion adjusting ring is sleeved at the front end of the gear box and can move back and forth on the gear box;

the elastic piece support is connected with the torque adjusting ring;

the elastic piece is arranged on the elastic piece support;

the gear shifting pin penetrates through the shell of the gear box, the rear end of the gear shifting pin is abutted against the front end of the inner gear ring so as to tightly push the inner gear ring, and the front end of the gear shifting pin is abutted against the elastic piece;

the elastic piece support is at least partially sleeved on the torsion adjusting ring, so that the elastic piece support is at least partially overlapped with the torsion adjusting ring in the radial direction of the first axis; the elastic piece is arranged in the axial projection of the torsion adjusting ring in the first axial direction.

The utility model relates to an in the optional embodiment, the casing front end of gear box is provided with the external screw thread, and the inner wall of torsion adjustable ring is provided with the internal thread with the external screw thread adaptation, and the torsion adjustable ring passes through screw-thread fit to be connected with the gear box.

The utility model relates to an in the optional embodiment, the inner wall of elastic component support is provided with the step face, and the step face cooperates with the rear end of torsion adjustable ring to make the elastic component support part cover locate on the torsion adjustable ring.

The utility model relates to an optional embodiment, the rear end of torsion adjustable ring is provided with the round arch, protruding edge first axis direction extends backward, protruding with the elastic component support the step face cooperation.

In an alternative embodiment of the present invention, the outer diameter of the protrusion is smaller than the outer diameter of the front end of the torsion adjusting ring.

The utility model relates to an optional implementation mode, the elastic component is the spring, and the spring is a plurality of, and a plurality of springs distribute along the circumference of elastic component support.

The utility model relates to an optional implementation mode, be provided with the reference column on the elastic component support, the spring housing is located on the reference column.

In an alternative embodiment of the present invention, the positioning column is disposed in the axial projection of the torsion adjusting ring in the first axial direction.

In an optional embodiment of the present invention, the torque output tool further comprises:

the torque adjusting cup is arranged at the front end of the shell of the torque output tool and is connected with the torque adjusting ring so as to drive the torque adjusting ring to move;

wherein, the periphery of torsion adjustable ring is provided with a plurality of lugs, and the inner wall of torsion adjusting cup is provided with the draw-in groove with the lug adaptation, and the draw-in groove extends along first axial direction, and the lug is located in the draw-in groove.

The utility model relates to an in the optional embodiment, the pin that shifts is a plurality of, and a plurality of shifts the pin and distributes along the circumference of ring gear, and the diameter of the circle that a plurality of shift the pin formed is less than the external diameter of torsion adjustable ring.

Compared with the prior art, the beneficial effects of the utility model are that:

the elastic part support is nested on the torsion adjusting ring, so that the axial size of the torsion output tool can be shortened; the elastic piece is arranged in the axial projection of the torque adjusting ring in the first axial direction, and the radial size of the torque output tool can be shortened.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the torque output tool of the present invention;

fig. 2 is a schematic cross-sectional view of an embodiment of the torque output tool of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2 according to the present invention;

fig. 4 is a schematic structural view of the torsion adjusting ring of the present invention;

FIG. 5 is a schematic structural view of the elastic member support according to the present invention;

fig. 6 is a schematic view of the elastic member support of fig. 5 according to another aspect of the present invention.

In the figure:

100-torque output tool; 101-a first axis; 10-a motor; 20-a gearbox; 30-a main shaft; 40-a housing; 50-torsion adjusting ring; 60-elastic piece support; 70-an elastic member; 80-a gear shifting pin; 90-a gasket; 110-torque adjustment cup;

21-a planet wheel; 22-ring gear; 23-a front shell; 231-external threads; 51-internal threads; 52-a lug; 53-bulge; 61-step surface; 62-a positioning column; 63-cylindrical wall.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Referring to fig. 1 and 2, a torque output tool 100 of the present invention includes a motor 10, a gear box 20, and a spindle 30 sequentially arranged from back to front along a first axis 101. The spindle 30 is provided at the front end of the torque output tool 100. The utility model discloses an among the specific embodiment, torque output instrument 100 is the electric drill, and main shaft 30 is used for being connected with the drill bit of electric drill, realizes drilling function. It will be appreciated that the torque output tool 100 includes a housing 40, with the motor 10, gearbox 20 and spindle 30 disposed in the housing 40.

A planetary reduction structure is provided in the gear box 20 to reduce the torque of the motor 10 to be output. As shown in fig. 3, the planetary reduction structure includes a sun gear, a planet gear 21 and an inner gear 22, and the planetary reduction structure is prior art and will not be described herein again. The planetary reduction structure in the gearbox 20 may be multi-stage or one-stage, and is not limited herein. The utility model discloses in, adopt the two-stage planet to slow down, as shown in fig. 3, the planet wheel 21 of last level planet speed reduction structure is connected with main shaft 30 to transmit the torque for main shaft 30.

As shown in fig. 3, the torque output tool 100 further includes a torque adjusting ring 50, the torque adjusting ring 50 is sleeved at the front end of the gear box 20, specifically, on the front shell 23 of the gear box 20, and the torque adjusting ring 23 can move back and forth on the gear box 20, so that the torque adjusting ring 23 is moved to push or release the inner gear ring 22 in the gear box 20, thereby achieving torque adjustment.

The torque output tool 100 further includes an elastic member holder 60, and the elastic member holder 60 is connected to the torque adjustment ring 50 to move together with the torque adjustment ring 50. The elastic member support 60 is provided with an elastic member 70, the elastic member 70 is connected with a shift pin 80, and the shift pin 80 abuts against the ring gear 22 to tightly push the ring gear 22 or release the ring gear 22. Specifically, as shown in fig. 3, the shift pin 80 is disposed through the housing of the gear box 20, the rear end of the shift pin 20 abuts against the front end of the ring gear 22 to tightly press against the ring gear 22, the front end of the shift pin 20 abuts against the elastic member 70, the elastic member 70 is disposed on the elastic member support 60, the elastic member support 60 is connected to the torque adjusting ring 50, and when the torque adjusting ring 50 moves back and forth along the gear box 22 under the action of an external force, the elastic member support 60 is driven to move back and forth to tightly press or loosen the elastic member 70, and the elastic member 70 further presses or loosens the shift pin 80, so that the shift pin 80 presses or loosens the ring gear 22, thereby achieving the adjustment of the torque. The principle of how to adjust the torque by tightening and loosening the inner gear ring 22 is the prior art, and will not be described herein. When a multi-stage planetary reduction structure is provided in the gear box 20, the ring gear 22 abutting against the shift pin 80 is the ring gear 22 of the planetary reduction structure directly connected to the main shaft 30, i.e. the ring gear 22 of the planetary reduction structure at the forefront stage as shown in fig. 3, and it is apparent from fig. 3 that the shift pin 80 abuts against the ring gear 22 of the planetary reduction structure at the forefront stage.

In the utility model discloses in, as shown in fig. 3, elastic component support 60 is at least partly overlapped on torsion adjusting ring 50, and elastic component support 60 has one section to take on torsion adjusting ring 50 on first axis 101 direction promptly, can make elastic component support 60 at least part and torsion adjusting ring 50 overlap in the radial direction of first axis 101 like this, with the nested size in torsion adjusting ring 50 of elastic component support 60, can reduce whole machine along the ascending size in first axis 101 direction. In addition, the elastic element 70 is disposed in the axial projection of the torque adjusting ring 50 in the direction of the first axis 101, so that the elastic element 70 can be prevented from occupying a large space in the radial direction, the radial size of the whole machine can be reduced, the torque output tool 100 is more portable, and the torque output tool can be applied to more operation scenes.

In one embodiment, the torsion adjustment ring 50 is threadably engaged with the housing of the gear box 20 such that rotation of the torsion adjustment ring 50 causes the torsion adjustment ring 50 to move on the housing of the gear box 20. Specifically, the front end of the housing of the gear box 20 is provided with an external thread 231, and the front housing 23 of the gear box 20 is provided with an external thread 231, as shown in fig. 3 and 4, the inner wall of the torque adjusting ring 50 is provided with an internal thread 51 adapted to the external thread 231, the torque adjusting ring 50 is connected to the gear box 20 through the matching of the internal thread 51 and the external thread 231, and when the torque adjusting ring 50 is rotated, the torque adjusting ring 50 can move back and forth on the gear box 20 through the thread, thereby achieving the torque adjustment of the torque output tool 100.

In one embodiment, as shown in fig. 5, the inner wall of the elastic member holder 60 is provided with a step surface 61, the step surface 61 is used for nesting the elastic member holder 60 on the torsion adjusting ring 50, and the step surface 61 is engaged with the rear end of the torsion adjusting ring 50, so that the elastic member holder 60 is partially sleeved on the torsion adjusting ring 50. During assembly, the elastic member support 60 is inserted into the torsion adjusting ring 50 from the rear end of the torsion adjusting ring 50, and the step surface 61 abuts against the rear end surface of the torsion adjusting ring 50 to achieve positioning of the assembly.

Further, as shown in fig. 4, the torsion adjusting ring 50 is provided at a rear end thereof with a ring of protrusions 53, the protrusions 53 extend rearward in the direction of the first axis 101 to form a connection portion with the elastic member holder 60, and the protrusions 53 are engaged with the stepped surface 61 of the elastic member holder 60 such that the elastic member holder 60 is nested in the torsion adjusting ring 50.

Further, as shown in fig. 4, the outer diameter of the protrusion 53 is smaller than the outer diameter of the front end of the torsion adjusting ring 50, so that the protrusion 53 forms a cylinder with a smaller diameter at the rear end of the torsion adjusting ring 50, the elastic member holder 60 is sleeved on the cylinder with the smaller diameter, the part with the larger diameter at the front end of the torsion adjusting ring 50 is used for positioning the front end of the elastic member holder 60, and after the elastic member holder 60 is assembled on the torsion adjusting ring 50, the front end surface of the elastic member holder 60 abuts against the part with the larger diameter at the front end of the torsion adjusting ring 50, so that the assembly positioning of the elastic member holder 60 and the torsion adjusting ring 50 is realized.

As shown in fig. 3, in one embodiment, the elastic member 70 is a spring, and the spring is a plurality of springs distributed along the circumference of the elastic member support 60. The jacking force of the spring jacking shifting pin 80 can be improved by arranging a plurality of springs, and the springs are uniformly distributed in the circumferential direction of the elastic part support 60, so that the jacking force is more uniform.

In one embodiment, as shown in fig. 6, a positioning post 62 is disposed on the elastic member support 60, the spring is sleeved on the positioning post 62, and the positioning post 62 is disposed to facilitate the installation and positioning of the spring, so that the front end of the spring is directly clamped on the positioning post 62. Preferably, the diameter of the positioning post 62 is smaller than or equal to the inner diameter of the spring, and preferably, the diameter of the positioning post 62 is equal to the inner diameter of the spring, so that the spring can be sleeved on the positioning post 62, and the spring can be prevented from being loosened due to the smaller diameter of the positioning post 62.

Furthermore, a cylindrical wall 63 is arranged around the positioning column 62, and the cylindrical wall 63 surrounds around the positioning column 62, so that the spring can be further limited, and the spring is prevented from being loosened.

Furthermore, the positioning post 62 is disposed in the axial projection of the torque adjusting ring 50 in the direction of the first axis 101 to reduce the radial dimension of the torque output tool 100, so that the overall structure is more compact.

In one embodiment, as shown in fig. 3, the spring is disposed in front of the shift pin 80 in the direction along the first axis 101, that is, the elastic member 70 and the shift pin 80 are disposed in tandem in the direction along the first axis 101, so that the elastic member 70 and the shift pin 80 are prevented from overlapping in the radial direction, and the overall radial dimension can be reduced.

In one embodiment, as shown in fig. 3, a spacer 90 is padded between the resilient member 70 and the shift pin 80. The washer 90 is annular and is sleeved on the housing of the gear box 20, the elastic member 70 abuts against the washer 90, and the washer 90 abuts against the shift pin 80. After the spacer 90 is provided, the position of the elastic member 70 does not need to correspond to the position of the shift pin 80 one by one, and since the spacer 90 is annular, a piece of spacer 90 is padded at the front end of the shift pin 80, and then the rear end of the elastic member 70 is abutted against the spacer 90, so that the elastic member 70 is abutted against the shift pin 80. Without the spacer 90, each shift pin 80 needs to have an elastic member 70 abutting against it, which makes assembly difficult.

As shown in fig. 1-3, the torque output tool 100 further includes a torque adjustment cup 110, the torque adjustment cup 110 is used for rotating the torque adjustment ring 50, the torque adjustment cup 110 is disposed at the front end of the housing 40 of the torque output tool 100 and connected to the torque adjustment ring 50, when the torque adjustment cup 110 is rotated, the torque adjustment ring 50 is driven to rotate on the gear box 20, so that the torque adjustment ring 50 moves back and forth on the gear box 20, and further the elastic member 70 and the shift pin 80 are pressed or released, and finally the inner gear ring 22 is pressed or released, thereby achieving torque adjustment.

As shown in fig. 4, the periphery of the torsion adjusting ring 50 is provided with a plurality of lugs 52, the inner wall of the torsion adjusting cup 110 is provided with a locking groove adapted to the lugs 52, the locking groove extends along the first axis 101, and the lugs 52 are arranged in the locking groove, so that the torsion adjusting ring 50 is connected to the torsion adjusting cup 110, and the torsion adjusting ring 50 can rotate along with the torsion adjusting cup 110. Meanwhile, since the torsion adjusting ring 50 is in threaded connection with the housing of the gear box 20, when the torsion adjusting ring 50 rotates along with the torsion adjusting cup 110, the torsion adjusting ring 50 moves on the housing of the gear box 20 along the first axis 101 to push the shift pin 80 to push or release the inner gear 22. Since the catch on the torsion adjustment cup 110 extends in the direction of the first axis 101, space is also provided for the lug 52 to move in the direction of the first axis 101.

As shown in fig. 3, the number of the shift pins 80 is several, the number of the shift pins 80 is distributed along the circumferential direction of the ring gear 22, a circle is formed due to the distribution of the number of the shift pins 80 along the circumferential direction, and the diameter of the circle formed by the number of the shift pins 80 is smaller than the outer diameter of the torque adjusting ring 50, so that the shift pins 80 are distributed in the axial projection range of the torque adjusting ring 50 along the direction of the first axis 101, and the radial size of the torque output tool 100 is reduced.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A torque output tool, comprising:

the elastic piece support is connected with the torsion adjusting ring;

the elastic piece is arranged on the elastic piece support;

the torsion adjusting ring is characterized in that the elastic part support is at least partially sleeved on the torsion adjusting ring, so that the elastic part support and the torsion adjusting ring are at least partially overlapped in the radial direction of the first axis; the elastic piece is arranged in an axial projection of the torsion adjusting ring in the first axial direction.

2. The torque output tool according to claim 1, wherein the front end of the housing of the gear box is provided with an external thread, the inner wall of the torque adjusting ring is provided with an internal thread adapted to the external thread, and the torque adjusting ring is connected with the gear box through a thread fit.

3. The torque output tool according to claim 1, wherein the inner wall of the elastic member support is provided with a step surface, and the step surface is engaged with the rear end of the torque adjustment ring so that the elastic member support is partially fitted over the torque adjustment ring.

4. A torque output tool according to claim 3, wherein the rear end of the torque adjustment ring is provided with a ring of protrusions extending rearwardly in the direction of the first axis, the protrusions engaging with the stepped surface of the spring mount.

5. The torque output tool according to claim 4, wherein the outer diameter of the protrusion is smaller than the outer diameter of the front end of the torque adjustment ring.

6. A torque output tool according to claim 1, wherein the resilient member is a spring, and the spring is a plurality of springs distributed circumferentially around the resilient member support.

7. The torque output tool according to claim 6, wherein the elastic member support is provided with a positioning column, and the spring is sleeved on the positioning column.

8. The torque output tool according to claim 7, wherein the positioning posts are disposed in an axial projection of the torque adjustment ring in the first axial direction.

9. The torque output tool according to claim 1, further comprising:

the periphery of the torque adjusting ring is provided with a plurality of lugs, the inner wall of the torque adjusting cup is provided with a clamping groove matched with the lugs, the clamping groove extends along the first axis direction, and the lugs are arranged in the clamping groove.

10. The torque output tool according to claim 1, wherein the shift pins are distributed along a circumferential direction of the inner gear ring, and a diameter of a circle formed by the shift pins is smaller than an outer diameter of the torque adjusting ring.