CN210389480U

CN210389480U - Punching pliers

Info

Publication number: CN210389480U
Application number: CN201921037825.5U
Authority: CN
Inventors: 张进銓
Original assignee: Mingxi Industry Co Ltd
Current assignee: Mingxi Industry Co Ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-04-24
Anticipated expiration: 2029-07-02

Abstract

The utility model discloses a hole pincers, include: a pincer body and a punch. The clamp body comprises a first jaw part and a second jaw part which can be opened and closed relatively; the drilling member includes a rotating body and a plurality of drilling columns, the rotating body can rotate clockwise and can be reversibly positioned on the first jaw portion, the plurality of drilling columns are arranged on the outer peripheral side of the rotating body at intervals, and the apertures of the plurality of drilling columns are different in size.

Description

Punching pliers

Technical Field

The present invention relates to a punching device, and more particularly to a pair of hole punching pliers.

Background

In daily life, often can punch the book of wearing through perforating device, like hole puncher, hole pincers to the plural number paper of dispersion to in accomodate, carry and arrange in order. Of course, the punching device can also punch holes on leather objects such as leather sheets and waistbands, and is not limited to word processing.

However, the hole punching machine commonly used for word processing in life, such as taiwan patent No. M444945, has fixed specification of hole punching piece, large volume and small hole punching thickness, and has many disadvantages and limitations; the other type of pliers-type hole punching device, taiwan patent No. 356757, has the advantages of large opening and closing angle and portability, however, the steps of replacing the anvil and the hole cutter are complicated and the components are easy to lose, which has the disadvantage of requiring improvement.

Therefore, there is a need to provide a new and improved hole punch pliers to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a hole pincers, its piece that punches can freely be in the same direction as changeing and reversing, lets the user rotate the bore size to required punching post fast.

To achieve the above object, the present invention provides a pair of hole punching pliers, including: a pincer body and a punch. The clamp body comprises a first jaw part and a second jaw part which can be opened and closed relatively; the drilling member includes a rotating body and a plurality of drilling columns, the rotating body can rotate clockwise and can be reversibly positioned on the first jaw portion, the plurality of drilling columns are arranged on the outer peripheral side of the rotating body at intervals, and the apertures of the plurality of drilling columns are different in size.

The hole punching pliers further comprise a first positioning part and a plurality of second positioning parts, one of the first positioning part and the plurality of second positioning parts is arranged on the rotating body, the other one of the first positioning part and the plurality of second positioning parts is arranged on the first jaw part, and the first positioning part can be selectively combined with one of the second positioning parts for positioning; wherein, the plurality of second positioning parts are arranged at intervals along the circumferential direction of the rotating body.

The first positioning part and each second positioning part are mutually embedded and positioned through a concave-convex structure.

The first positioning part is a positioning pin, the second positioning parts are positioning groove bodies, the positioning pin can penetrate through the first jaw part in a movable mode at a first position and a second position, and the positioning groove bodies are arranged in the rotating body in a concave mode; wherein, the first position is defined when one head of the positioning pin is embedded into one positioning groove body, and the second position is defined when the head of the positioning pin is separated from one positioning groove body.

In the circumferential direction of the rotating body, the positioning groove body comprises two wall parts which are arranged at intervals; two inclined guide surfaces are arranged on two opposite sides of the head of the positioning pin to respectively face the two wall parts in a longitudinal section view of the positioning pin, and the two inclined guide surfaces are mutually inclined and close to each other in the direction that the positioning pin is embedded into the positioning groove; when the rotating body is driven to rotate relative to the first jaw, one inclined guide surface slides against the wall part facing the inclined guide surface so as to guide the positioning pin to slide between the first position and the second position.

The punching pliers further comprise an elastic piece, the elastic piece is arranged on the first jaw and is abutted to the positioning pin, and therefore the head of the positioning pin normally tends to approach the rotating body.

The positioning pin further comprises a body part and a tail part, wherein the body part is arranged between the head part and the tail part and protrudes out of the tail part in the radial direction to form a first step part; the elastic piece is plate-shaped, two ends of the elastic piece are positioned at the first jaw part, the tail part penetrates through the elastic piece, and the elastic piece is pressed against the first step part to drive the positioning pin to approach the rotating body.

The first jaw is provided with a through hole in a penetrating way, the head of the positioning pin penetrates through the through hole to prop against the rotating body, and the wall of the through hole is provided with a propping part in a radially protruding way; the body part protrudes out of the head part in the radial direction to form a second step part, and when the positioning pin is pushed by the elastic piece to approach the rotating body, the abutting part stops and limits the second step part so as to control the length of the head part protruding out of the through hole.

The rotating body comprises two components with the same structure, the two components mutually cover, clamp and position the plurality of punching columns, the two components jointly define an inner space, two ports respectively penetrate through the two components, the ports are communicated with the inner space in the axial direction of the rotating body, and the plurality of punching columns are communicated with the inner space.

In the circumferential direction of the rotating body, the positioning groove body comprises two wall parts which are arranged at intervals; two inclined guide surfaces are arranged on two opposite sides of the head of the positioning pin to respectively face the two wall parts in a longitudinal section view of the positioning pin, and the two inclined guide surfaces are mutually inclined and close to each other in the direction that the positioning pin is embedded into the positioning groove; when the rotating body is driven to rotate relative to the first jaw, one inclined guide surface slides against the wall part facing the inclined guide surface so as to guide the positioning pin to slide between the first position and the second position; the rotating body comprises two components with the same structure, the two components mutually cover, clamp and position the plurality of perforating columns, the two components jointly define an inner space, two ports respectively penetrate through the two components, the ports are communicated with the inner space in the axial direction of the rotating body, and the plurality of perforating columns are communicated with the inner space; the hole punching pliers further comprise a hole punching block, the hole punching block is positioned on the second jaw part, and when the first jaw part is relatively close to the second jaw part, a hole punching column is abutted against and pressed against the hole punching block; the pincer body further comprises a first arm piece, a second arm piece and a spring, the first arm piece and the second arm piece are mutually pivoted, one end of the first arm piece is provided with the first jaw part, the other end of the first arm piece is provided with a first holding part, one end of the second arm piece is provided with the second jaw part, the other end of the second arm piece is provided with a second holding part, and two ends of the spring respectively prop against the first holding part and the second holding part so as to force the first jaw part to be away from the second jaw part normally; the first jaw comprises two spaced base plates and a reinforced plate, the two base plates are connected with the first holding part, the rotating body is positioned between the two base plates, the reinforced plate is arranged on one base plate and between the base plate and the elastic piece, the through hole penetrates through the reinforced plate and the base plate, and in the extending direction of the through hole, the base plate protrudes out of the reinforced plate to form the abutting part; the thickness of the elastic piece is smaller than that of the reinforced plate and smaller than that of the substrate, and the thickness of the substrate is larger than that of the reinforced plate; the thickness of the elastic piece is less than half of that of the reinforcing plate; the punching pliers also comprise a marking cover piece and a plug piece, wherein two shaft parts of the rotating body can rotatably penetrate through the two substrates, the two shaft parts are provided with the two through holes, the marking cover piece is covered on the through hole of the shaft part to form a co-rotation relation, the marking cover piece is provided with a plurality of marking parts, the plurality of marking parts respectively correspond to the plurality of punching columns, and the plug piece is covered on the through hole of the other shaft part to form a co-rotation relation; the elastic piece is bent; the reinforced plate is in a herringbone shape; one of the two wall parts of the positioning groove body extends along the axial direction of the rotating body, and the other wall part extends obliquely to the axial direction of the rotating body; in the axial direction of the rotating body, the length of the head part extending into the positioning groove body is half of the depth of the positioning groove body; the number and the positions of the second positioning parts correspond to the number and the positions of the perforating columns; the plurality of positioning groove bodies are circumferentially arranged at the outer peripheral edge of the rotating body at equal angles, the direction of the notch of each positioning groove body is equal to the axial direction of the rotating body, and the positioning pin is inserted into the positioning groove bodies along the axial direction of the rotating body for positioning.

The utility model has the advantages that: the utility model discloses a hole pincers, its piece of punching can be in the same direction as the design of commentaries on classics and reversible, have improved the operation process of selecting the post of punching of different bores by a wide margin, let the user more convenient rapidly in the operation.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention.

Fig. 2 is a perspective view of fig. 1 from another perspective.

Fig. 3 is an exploded perspective view.

Fig. 4 is an enlarged perspective view of a punching member according to an embodiment of the present invention.

Fig. 5 is a usage status diagram of an embodiment of the present invention.

Fig. 6 is a partially enlarged sectional view of fig. 5.

Fig. 7 to 10 are schematic views showing the punching member being rotated in one direction relative to the first jaw.

Fig. 11 to 12 are schematic views showing the counter-rotation of the punch member relative to the first jaw.

1: the caliper body 55: through hole

2: first arm member 56: punching column

21: first jaw 6: a first positioning part

22: through hole 61: locating pin

221: the abutting portion 611: head part

23: substrate 612: inclined guide surface

24: reinforcing plate 62: body part

25: first grip portion 63: tail part

3: second arm member 64: first stage

31: second jaw 65: second step part

32: and (7) punching block: second positioning part

33: second grip portion 71: positioning groove body

4: spring 711: wall part

5: the punching piece 8: spring piece

51: the rotator 91: indicating cover member

52: shaft portion 911: marking part

53: member 92: plug member

54: inner space

Detailed Description

The following description is given by way of example only, and not by way of limitation, of the scope of the invention as claimed.

Referring to fig. 1 to 12, a preferred embodiment of the present invention is shown, in which the hole punching pliers of the present invention includes a pliers body 1 and a punching member 5.

The clamp body 1 includes a first jaw 21 and a second jaw 31 which can be opened and closed relatively. The drilling member 5 includes a rotating body 51 and a plurality of drilling columns 56, the rotating body 51 can be rotated clockwise and reversibly positioned on the first jaw 21, the plurality of drilling columns 56 are spaced on the outer periphery of the rotating body 51, and the apertures of the plurality of drilling columns 56 are different in size. The reversible bidirectional rotation design of the rotating body 51 is helpful for the user to freely control, and further to rapidly rotate the punching column 56 with the required caliber, which is quite convenient and rapid for the operation of replacing and selecting the punching columns 56 with different calibers.

Preferably, the hole-punching pliers further comprise a hole-punching block 32, the hole-punching block 32 is positioned on the second jaw 31, when the first jaw 21 is relatively close to the second jaw 31, a hole-punching column 56 is pressed against the hole-punching block 32, so that the hole-punching column 56 can be matched with the hole-punching block 32 to actually punch a hole on an object, and the abrasion can be concentrated on the hole-punching block 32, after a period of use, a user only needs to replace another new hole-punching block 32 without replacing the whole second jaw 31.

More specifically, the pincer body 1 further includes a first arm member 2, a second arm member 3 and a spring 4, the first arm member 2 and the second arm member 3 are pivotally connected to each other, one end of the first arm member 2 is provided with the first jaw 21, the other end is provided with a first holding portion 25, one end of the second arm member 3 is provided with the second jaw 31, the other end is provided with a second holding portion 33, and a user can control opening and closing of the first jaw 21 and the second jaw 31 by pressing or stretching the first holding portion 25 and the second holding portion 33; the two ends of the spring 4 respectively abut against the first holding portion 25 and the second holding portion 33, so as to force the first jaw 21 to be away from the second jaw 31.

More specifically, the swivel 51 includes two members 53 having the same structure, the two members 53 mutually cover and sandwich and position the plurality of drilling pillars 56, the two members 53 together define an inner space 54, two through holes 55 respectively penetrate through the two members 53, the through holes 55 are communicated with the inner space 54 in the axial direction of the swivel 51, and the plurality of drilling pillars 56 are communicated with the inner space 54. The punched waste material can be moved to the inner space 54 through the punching column 56 for uniform collection, and after a certain amount of waste material is collected, the waste material can be discharged to the outside through the through holes 55.

The hole-punching pliers further comprise a first positioning portion 6 and a plurality of second positioning portions 7, one of the first positioning portion 6 and the plurality of second positioning portions 7 is disposed on the rotating body 51, the other is disposed on the first jaw 21, and the first positioning portion 6 can be selectively combined with the second positioning portion 7 for positioning. The plurality of second positioning portions 7 are disposed at intervals along the circumferential direction of the rotating body 51, and the number and the positions of the plurality of second positioning portions 7 correspond to the number and the positions of the plurality of punching columns 56, so that the rotating body 51 can be maintained in a positioning state regardless of which punching column 56 is selected by a user, and a punching operation can be stably performed.

More specifically, the first positioning portions 6 and the second positioning portions 7 are fitted and positioned to each other through a concave-convex structure. Wherein, the first positioning portion 6 is a positioning pin 61, the second positioning portions 7 are positioning groove bodies 71, the positioning pin 61 can move between a first position and a second position to penetrate through the first jaw 21, and the positioning groove bodies 71 are recessed in the rotating body 51; the first position is defined when a head 611 of the positioning pin 61 is inserted into a positioning slot 71, and the second position is defined when the head 611 of the positioning pin 61 is separated from the positioning slot 71. In more detail, the plurality of positioning groove bodies 71 are circumferentially arranged at the outer periphery of the rotator 51 at equal angles, the direction of the notch of each positioning groove body 71 is equal to the axial direction of the rotator 51, and the positioning pin 61 is inserted into the positioning groove body 71 along the axial direction of the rotator 51 for positioning.

It is emphasized that the positioning groove 71 includes two wall portions 711 disposed at intervals in the circumferential direction of the rotating body 51, two inclined guide surfaces 612 are provided on opposite sides of the head portion 611 of the positioning pin 61 to face the two wall portions 711, respectively, as viewed in a longitudinal section of the positioning pin 61, and the two inclined guide surfaces 612 are inclined to each other in a direction in which the positioning pin 61 is fitted into the positioning groove. When the rotating body 51 is driven to rotate relative to the first jaw 21, one of the inclined guide surfaces 612 slides against the facing wall 711, so as to guide the positioning pin 61 to slide between the first position and the second position.

More specifically, when the rotator 51 rotates clockwise or counterclockwise, the positioning pin 61 can slide into or out of the positioning slot 71 through the two inclined guide surfaces 612 smoothly, so that the rotator 51 can rotate in both directions without hindrance. In the present embodiment, one of the two wall portions 711 of the positioning groove 71 extends along the axial direction of the rotating body 51, and the other extends obliquely to the axial direction of the rotating body 51.

Preferably, the hole-punching pliers further include an elastic member 8, the elastic member 8 is disposed on the first jaw 21 and abuts against the positioning pin 61, so that the head 611 of the positioning pin 61 normally tends to approach the swivel 51, so as to ensure that the positioning pin 61 is laterally abutted against the swivel 51 in any state, which is beneficial to positioning stability and automatic positioning. Wherein, the automatic positioning function means that when the rotating body 51 is rotated to make one positioning groove 71 correspond to the positioning pin 61, the elastic member 8 can automatically force the positioning pin 61 to insert.

In the present embodiment, the positioning pin 61 further includes a body portion 62 and a tail portion 63, the body portion 62 is disposed between the head portion 611 and the tail portion 63, and the body portion 62 radially protrudes from the tail portion 63 to form a first step portion 64; the elastic member 8 is plate-shaped, and two ends of the elastic member are positioned at the first jaw 21, the tail 63 penetrates through the elastic member 8, and the elastic member 8 is pressed against the first step 64 to drive the positioning pin 61 to approach the rotating body 51. Meanwhile, the tail 63 passing through the elastic member 8 also enables the positioning pin 61 to be restrained and not prone to shaking by external force, and can only move along the direction of the pressing and resisting force of the elastic member 8, so that the positioning pin has the advantage of stable movement.

It can be understood that the first jaw 21 is provided with a through hole 22, the head 611 of the positioning pin 61 passes through the through hole 22 to abut against the rotating body 51, the wall of the through hole 22 is preferably provided with an abutting portion 221 in a radially protruding manner, and the body 62 radially protrudes from the head 611 to form a second step 65, so that when the positioning pin 61 is pushed by the elastic member 8 to approach the rotating body 51, the abutting portion 221 stops and limits the second step 65, so as to control the length of the head 611 protruding out of the through hole 22, and thus the depth of the head 611 inserted into the positioning groove 71 can be grasped, and the rotating body 51 can smoothly perform bidirectional rotation. In the present embodiment, in the axial direction of the rotating body 51, the length of the head 611 extending into the positioning slot 71 is half of the depth of the positioning slot 71, so that the positioning effect is more appropriate without generating excessive rotation resistance.

Specifically, the first jaw 21 includes two spaced substrates 23 and a reinforcing plate 24, the two substrates 23 are connected to the first holding portion 25, the rotating body 51 is positioned between the two substrates 23, the reinforcing plate 24 is disposed on one substrate 23 and between the substrate 23 and the elastic member 8, the through hole 22 penetrates through the reinforcing plate 24 and the substrate 23, and in the extending direction of the through hole 22, the substrate 23 protrudes out of the reinforcing plate 24 to form the abutting portion 221; wherein, the elastic piece 8 is in a bending shape; the reinforcing plate is in a herringbone shape.

In the embodiment, the thickness of the elastic member 8 is smaller than the thickness of the reinforcing plate 24 and smaller than the thickness of the substrate 23, so as to ensure that the elastic member 8 has flexibility and can deform along with the position of the positioning pin 61, and provide a pushing force. Moreover, according to practical tests, the thickness of the elastic member 8 is less than half of the thickness of the reinforcing plate 24, so that the effect is better. In addition, the thickness of the substrate 23 is greater than that of the reinforcing plate 24, so that the rotator 51 can be stably supported, and the substrate has strong structural rigidity against external force.

Additionally, the hole punch pliers further comprises a marking cover member 91 and a plug member 92, the two shaft portions 52 of the rotating body 51 rotatably penetrate through the two substrates 23, the two shaft portions 52 are provided with the two through holes 55, the marking cover member 91 covers the through holes 55 of one shaft portion 52 to form the same rotating relationship, the marking cover member 91 is provided with a plurality of marking portions 911, the plurality of marking portions 911 respectively correspond to the plurality of hole punching columns 56, and the plug member 92 covers the through hole 55 of the other shaft portion 52 to form the same rotating relationship.

To sum up, the utility model discloses a hole pincers, its piece of punching can be in the same direction as the design of commentaries on classics and reversible, have improved the operation process of selecting the punching post of different bores by a wide margin, let the user more convenient rapidly in the operation.

Claims

1. Perforating pliers, characterized in that it comprises:

a clamp body, which comprises a first jaw part and a second jaw part which can be oppositely opened and closed;

the drilling piece comprises a rotating body and a plurality of drilling columns, the rotating body can rotate clockwise and can be reversibly positioned at the first jaw part, the plurality of drilling columns are arranged on the outer peripheral side of the rotating body at intervals, and the calibers of the plurality of drilling columns are different in size.

2. The hole punch pliers of claim 1, wherein: the first positioning part and the second positioning parts are arranged on the rotating body, one of the first positioning part and the second positioning parts is arranged on the first jaw part, and the first positioning part can be selectively combined and positioned with the second positioning part; wherein, the plurality of second positioning parts are arranged at intervals along the circumferential direction of the rotating body.

3. The hole punch pliers of claim 2, wherein: the first positioning part and each second positioning part are mutually embedded and positioned through a concave-convex structure.

4. The hole punch pliers of claim 3, wherein: the first positioning part is a positioning pin, the second positioning parts are positioning groove bodies, the positioning pin can penetrate through the first jaw part in a movable mode at a first position and a second position, and the positioning groove bodies are arranged in the rotating body in a concave mode; wherein, the first position is defined when one head of the positioning pin is embedded into one positioning groove body, and the second position is defined when the head of the positioning pin is separated from one positioning groove body.

5. The hole punch pliers of claim 4, wherein: in the circumferential direction of the rotating body, the positioning groove body comprises two wall parts which are arranged at intervals; two inclined guide surfaces are arranged on two opposite sides of the head of the positioning pin to respectively face the two wall parts in a longitudinal section view of the positioning pin, and the two inclined guide surfaces are mutually inclined and close to each other in the direction that the positioning pin is embedded into the positioning groove; when the rotating body is driven to rotate relative to the first jaw, one inclined guide surface slides against the wall part facing the inclined guide surface so as to guide the positioning pin to slide between the first position and the second position.

6. The hole punch pliers of claim 4, wherein: and the elastic piece is arranged on the first jaw and is abutted against the positioning pin, so that the head of the positioning pin normally has a tendency of approaching the swivel.

7. The hole punch pliers of claim 6, wherein: the positioning pin further comprises a body part and a tail part, wherein the body part is arranged between the head part and the tail part and protrudes out of the tail part in the radial direction to form a first step part; the elastic piece is plate-shaped, two ends of the elastic piece are positioned at the first jaw part, the tail part penetrates through the elastic piece, and the elastic piece is pressed against the first step part to drive the positioning pin to approach the rotating body.

8. The hole punch pliers of claim 7, wherein: the first jaw is provided with a through hole in a penetrating way, the head of the positioning pin penetrates through the through hole to prop against the rotating body, and the wall of the through hole is provided with a propping part in a radially protruding way; the body part protrudes out of the head part in the radial direction to form a second step part, and when the positioning pin is pushed by the elastic piece to approach the rotating body, the abutting part stops and limits the second step part so as to control the length of the head part protruding out of the through hole.

9. The perforating pliers according to any one of claims 1 to 8, characterized in that: the rotating body comprises two components with the same structure, the two components mutually cover, clamp and position the plurality of punching columns, the two components jointly define an inner space, two ports respectively penetrate through the two components, the ports are communicated with the inner space in the axial direction of the rotating body, and the plurality of punching columns are communicated with the inner space.

10. The hole punch pliers of claim 8, wherein: in the circumferential direction of the rotating body, the positioning groove body comprises two wall parts which are arranged at intervals; two inclined guide surfaces are arranged on two opposite sides of the head of the positioning pin to respectively face the two wall parts in a longitudinal section view of the positioning pin, and the two inclined guide surfaces are mutually inclined and close to each other in the direction that the positioning pin is embedded into the positioning groove; when the rotating body is driven to rotate relative to the first jaw, one inclined guide surface slides against the wall part facing the inclined guide surface so as to guide the positioning pin to slide between the first position and the second position; the rotating body comprises two components with the same structure, the two components mutually cover, clamp and position the plurality of perforating columns, the two components jointly define an inner space, two ports respectively penetrate through the two components, the ports are communicated with the inner space in the axial direction of the rotating body, and the plurality of perforating columns are communicated with the inner space; the hole punching pliers further comprise a hole punching block, the hole punching block is positioned on the second jaw part, and when the first jaw part is relatively close to the second jaw part, a hole punching column is abutted against and pressed against the hole punching block; the pincer body further comprises a first arm piece, a second arm piece and a spring, the first arm piece and the second arm piece are mutually pivoted, one end of the first arm piece is provided with the first jaw part, the other end of the first arm piece is provided with a first holding part, one end of the second arm piece is provided with the second jaw part, the other end of the second arm piece is provided with a second holding part, and two ends of the spring respectively prop against the first holding part and the second holding part so as to force the first jaw part to be away from the second jaw part normally; the first jaw comprises two spaced base plates and a reinforced plate, the two base plates are connected with the first holding part, the rotating body is positioned between the two base plates, the reinforced plate is arranged on one base plate and between the base plate and the elastic piece, the through hole penetrates through the reinforced plate and the base plate, and in the extending direction of the through hole, the base plate protrudes out of the reinforced plate to form the abutting part; the thickness of the elastic piece is smaller than that of the reinforced plate and smaller than that of the substrate, and the thickness of the substrate is larger than that of the reinforced plate; the thickness of the elastic piece is less than half of that of the reinforcing plate; the punching pliers also comprise a marking cover piece and a plug piece, wherein two shaft parts of the rotating body can rotatably penetrate through the two substrates, the two shaft parts are provided with the two through holes, the marking cover piece is covered on the through hole of the shaft part to form a co-rotation relation, the marking cover piece is provided with a plurality of marking parts, the plurality of marking parts respectively correspond to the plurality of punching columns, and the plug piece is covered on the through hole of the other shaft part to form a co-rotation relation; the elastic piece is bent; the reinforced plate is in a herringbone shape; one of the two wall parts of the positioning groove body extends along the axial direction of the rotating body, and the other wall part extends obliquely to the axial direction of the rotating body; in the axial direction of the rotating body, the length of the head part extending into the positioning groove body is half of the depth of the positioning groove body; the number and the positions of the second positioning parts correspond to the number and the positions of the perforating columns; the plurality of positioning groove bodies are circumferentially arranged at the outer peripheral edge of the rotating body at equal angles, the direction of the notch of each positioning groove body is equal to the axial direction of the rotating body, and the positioning pin is inserted into the positioning groove bodies along the axial direction of the rotating body for positioning.