CN215545025U

CN215545025U - Special clamping jaw for clamping wheel hub

Info

Publication number: CN215545025U
Application number: CN202123155559.6U
Authority: CN
Inventors: 曲玲; 杜兴卫
Original assignee: Yantai Zhonghe Machine Tool Accessories Co ltd
Current assignee: Yantai Zhonghe Machine Tool Accessories Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-01-18
Anticipated expiration: 2031-12-16

Abstract

The utility model relates to a special clamping jaw for clamping a wheel hub, which belongs to the technical field of machine tool accessories and comprises a base jaw and a clamping jaw movable part, wherein a bolt mounting hole and sawteeth are arranged on the base jaw, the clamping jaw movable part comprises a base jaw seat, a clamping jaw seat and a clamping jaw, the base jaw seat is rotatably mounted on the base jaw through a connecting piece one, the clamping jaw seat is rotatably mounted on the base jaw through a connecting piece two, the clamping jaw comprises an upper clamping jaw and a lower clamping jaw, the upper clamping jaw and the lower clamping jaw are rotatably mounted on the clamping jaw seat through a connecting piece three, an upper clamping point block is fixedly arranged on the inner side surface of the upper clamping jaw, and a lower clamping point block is fixedly arranged on the inner side surface of the lower clamping jaw. The special clamping jaw is composed of multiple parts, each part can rotate, the clamping jaw can be in contact with a wheel hub in multiple points during clamping, meanwhile, the flexibility of the clamping jaw can be matched with the wheel hub to change the position of a clamping point, the clamping precision is greatly improved, the machining precision is improved, the number of waste products is reduced, and the cost is saved.

Description

Special clamping jaw for clamping wheel hub

Technical Field

The utility model relates to the technical field of machine tool accessories, in particular to a special clamping jaw for clamping a wheel hub.

Background

The hub is also called a rim, is a wheel core rotating part formed by connecting the inner profile steel of a tire through an upright post, and is fixed and punched by using a machine tool in the production and processing process of the hub.

At present, a wheel hub is machined by a vertical lathe power chuck, soft claws are arranged on the chuck, an arc is machined on the chuck, for a three-claw chuck, a hub blank sometimes has irregular excircle deviation, so that the hub blank is not contacted with claws, clamping is not firm, errors are easy to generate during machining of the wheel hub, danger can also occur, a machined workpiece cannot be clamped well by a machined claw arc, and the machining precision of the workpiece is not high and even the workpiece is scrapped. Based on the clamping claw, the utility model provides the special clamping claw for clamping the wheel hub.

SUMMERY OF THE UTILITY MODEL

The utility model provides a special claw for clamping a wheel hub, aiming at solving the problems of low machining precision and even scrappage of a workpiece caused by poor clamping performance of the claw in the prior art.

The utility model is realized by the following technical scheme:

a special claw for clamping a wheel hub comprises a base claw fixed on a chuck, a claw movable part is fixed on the base claw and comprises a base claw seat, a claw seat and a clamping claw, the two clamping jaw seats are symmetrically distributed on two sides of the base jaw seat, the two clamping jaw seats are rotationally arranged on the base jaw seat through a second connecting piece, the clamping jaw comprises an upper clamping jaw and a lower clamping jaw, the upper clamping jaw and the lower clamping jaw are symmetrically distributed above and below the clamping jaw seat, the upper clamping jaw and the lower clamping jaw are both rotatably arranged on the clamping jaw seat through a connecting piece III, the inner side surface of the upper clamping jaw is fixedly provided with two upper clamping point blocks which are symmetrically distributed along the central axis of the upper clamping jaw, the inner side surface of the lower clamping jaw is fixedly provided with two lower clamping point blocks, and the two lower clamping point blocks are symmetrically distributed along the central axis of the lower clamping jaw.

Preferably, the first connecting piece comprises a first pin shaft and a first bolt, the first pin shaft is vertically fixed inside the base jaw seat, the first bolt is movably inserted into the first pin shaft in a pulling mode, the lower end of the first bolt is in threaded connection with the base jaw, the upper end of the first bolt is located inside the first pin shaft, a first clamping surface is arranged inside the first pin shaft and corresponds to the first bolt, the head of the first bolt is located above the first clamping surface, and the inner diameter of the first clamping surface is smaller than the outer diameter of the head of the first bolt.

Preferably, the second connecting piece comprises a second pin shaft and a second bolt, the second pin shaft is vertically fixed inside the clamping jaw seat, the second bolt is movably inserted inside the second pin shaft in a pulling mode, the lower end of the second bolt is in threaded connection with the side portion of the base jaw seat, the upper end of the second bolt is located inside the second pin shaft, a second clamping face is arranged inside the second pin shaft and corresponds to the second bolt, the head portion of the second bolt is located above the second clamping face, and the inner diameter of the second clamping face is smaller than the outer diameter of the head portion of the second bolt.

Preferably, the third connecting piece comprises a third pin shaft and a third bolt, the third pin shaft is vertically fixed inside the clamping jaw, the third bolt is movably inserted into the third pin shaft, the lower end of the third bolt is in threaded connection with the clamping jaw seat, the upper end of the third bolt is located inside the third pin shaft, a third clamping surface is arranged inside the third pin shaft and corresponds to the third bolt, the head of the third bolt is located below the third clamping surface, and the inner diameter of the third clamping surface is smaller than the outer diameter of the head of the third bolt.

In summary, the beneficial technical effects of the utility model are as follows: the clamping jaw is composed of a plurality of parts, each part can rotate, so that the clamping jaw can be in contact with a wheel hub in multiple points, the clamping jaw has high flexibility, the positions of clamping points can be changed by adapting to the wheel hub, and the clamping jaws can be guaranteed to be in contact with the wheel hub for clamping at the same time, so that the clamping precision is greatly improved, the number of waste products is reduced, the cost is saved, and the economic benefit is improved.

Drawings

FIG. 1 is a schematic view of the hub clamping arrangement of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic view in partial cross-section of the present invention;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

FIG. 5 is an enlarged schematic view at B in FIG. 3;

fig. 6 is an enlarged schematic view at C in fig. 3.

In the figure, 1, a base jaw; 2. a bolt mounting hole; 3. saw teeth; 4. a base jaw seat; 5. a jaw seat; 6. an upper clamping jaw; 7. a lower jaw; 8. an upper pinch point block; 9. a lower pinch point block; 10. a first pin shaft; 11. a first bolt; 12. a first clamping position surface; 13. a second pin shaft; 14. a second bolt; 15. a second clamping surface; 16. a third pin shaft; 17. a third bolt; 18. a third clamping position surface; 19. a chuck; 20. a hub.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-6, a special jaw for clamping a wheel hub comprises a base jaw 1 fixed on a chuck 19, the base jaw 1 is provided with a bolt mounting hole 2 and saw teeth 3, a jaw bolt is correspondingly mounted in the bolt mounting hole 2, the base jaw 1 is fixed on a slide block of the chuck 19 through the jaw bolt and the saw teeth 3, a jaw moving part is fixedly arranged above the base jaw 1 and comprises a base jaw seat 4, a jaw seat 5 and jaws, the base jaw seat 4 is rotatably mounted above the base jaw 1, the jaw seats 5 are provided with two jaws, the two jaw seats 5 are symmetrically distributed at two sides of the base jaw seat 4, the jaw seats 5 are rotatably mounted on the base jaw seat 4, each jaw comprises an upper jaw 6 and a lower jaw 7, the upper jaw 6 and the lower jaw 7 are symmetrically distributed above and below the jaw seat 5, the upper jaw 6 and the lower jaw 7 are rotatably mounted on the jaw seat 5, an upper clamping point block 8 is fixedly arranged on the inner side surface of the upper jaw 6, two upper clamping point blocks 8 are arranged, the two upper clamping point blocks 8 are symmetrically distributed along the longitudinal central axis of the upper clamping jaw 6, the lower clamping point blocks 9 are fixedly arranged on the inner side surface of the lower clamping jaw 7, the two lower clamping point blocks 9 are symmetrically distributed along the longitudinal central axis of the lower clamping jaw 7, and during clamping, the upper clamping point blocks 8 and the lower clamping point blocks 9 are both contacted with the hub 20.

The base jaw seat 4 is provided with a first connecting piece, the base jaw seat 4 is installed on the base jaw 1 through the first connecting piece, the first connecting piece comprises a first pin shaft 10 and a first bolt 11, the first pin shaft 10 is vertically fixed inside the base jaw seat 4, the first bolt 11 is movably inserted into the first pin shaft 10, the lower end of the first bolt 11 is in threaded connection with the base jaw 1, the upper end of the first bolt 11 is located inside the first pin shaft 10, a first clamping surface 12 is arranged inside the first pin shaft 10 and corresponds to the first bolt 11, the inner diameter of the first clamping surface 12 is smaller than the outer diameter of the head of the first bolt 11, and the first clamping surface 12 is matched with the first bolt 11 to prevent the base jaw seat 4 from being separated from the base jaw 1. When the base jaw seat is installed, the base jaw seat 4 and the base jaw 1 are connected through the first bolt 11, the first bolt 11 is movably inserted into the first pin shaft 10, the lower end of the first bolt 11 is in threaded connection with the inside of the base jaw 1, the head of the first bolt 11 is located above the first clamping face 12 in the first pin shaft 10, and a gap is kept between the head of the first bolt 11 and the first clamping face 12.

Because the first bolt 11 is not in threaded connection with the first pin shaft 10, and a gap is formed between the head of the first bolt 11 and the first clamping surface 12, the first base jaw seat 4 can rotate left and right around the first bolt 11, the first base jaw seat 4 can float up and down along the first bolt 11, and the first clamping surface 12 plays a role in limiting in the floating process, so that the first base jaw seat 4 and the first base jaw 1 are prevented from being separated.

The clamping jaw seat 5 is provided with a second connecting piece, the clamping jaw seat 5 is installed on the base jaw seat 4 through the second connecting piece, the second connecting piece comprises a second pin shaft 13 and a second bolt 14, the second pin shaft 13 is vertically fixed inside the clamping jaw seat 5, the second bolt 14 is movably inserted into the second pin shaft 13, the lower end of the second bolt 14 is in threaded connection with the base jaw seat 4, the upper end of the second bolt 14 is located inside the second pin shaft 13, a second clamping face 15 is arranged inside the second pin shaft 13 corresponding to the second bolt 14, the inner diameter of the second clamping face 15 is smaller than the outer diameter of the head of the second bolt 14, and the second clamping face 15 is matched with the second bolt 14 to prevent the clamping jaw seat 5 from being separated from the base jaw seat 4. During installation, the clamping jaw seat 5 and the base jaw seat 4 are connected through the second bolt 14, the second bolt 14 is movably inserted into the second pin shaft 13, the lower end of the second bolt 14 is in threaded connection with the inside of the base jaw seat 4, the head of the second bolt 14 is located above the second clamping face 15 in the second pin shaft 13, and a gap is kept between the head of the second bolt 14 and the second clamping face 15. The clamping jaw seat 5 can rotate left and right around the second bolt 14, the clamping jaw seat 5 can float up and down along the second bolt 14, and the second clamping face 15 plays a limiting role in the floating process, so that the clamping jaw seat 5 is prevented from being separated from the base jaw seat 4.

The clamping jaw is provided with a third connecting piece, the clamping jaw is installed on the clamping jaw seat 5 through the third connecting piece, the third connecting piece comprises a third pin shaft 16 and a third bolt 17, the third pin shaft 16 is vertically fixed inside the clamping jaw, the third bolt 17 is movably inserted into the third pin shaft 16, the lower end of the third bolt 17 is in threaded connection with the clamping jaw seat 5, the upper end of the third bolt 17 is located inside the third pin shaft 16, a third clamping surface 18 is arranged inside the third pin shaft 16 corresponding to the third bolt 17, the inner diameter of the third clamping surface 18 is smaller than the outer diameter of the head of the third bolt 17, and the third clamping surface 18 is matched with the third bolt 17 to prevent the clamping jaw from being separated from the clamping jaw seat 5. When the clamping jaw is installed, the clamping jaw and the clamping jaw seat 5 are connected through the third bolt 17, the third bolt 17 is movably inserted into the third pin shaft 16, the lower end of the third bolt 17 is in threaded connection with the inside of the clamping jaw seat 5, the head of the third bolt 17 is located above the third clamping face 18 in the third pin shaft 16, and a gap is kept between the head of the third bolt 17 and the third clamping face 18. The clamping jaw is consistent with the moving principle of the base jaw seat 4, the clamping jaw can rotate left and right around the third bolt 17, meanwhile, the clamping jaw can float up and down along the third bolt 17, and the third clamping face 18 plays a role in limiting in the floating process, so that the clamping jaw is prevented from being separated from the clamping jaw seat 5.

The working principle is as follows: the principle of the utility model is explained by taking a three-jaw chuck 19 as an example, firstly, a special jaw in the utility model is arranged on the chuck 19, saw teeth 3 below the jaw are meshed with saw teeth of a slide seat on the chuck 19, the jaw is further fixed on the chuck 19 through a jaw bolt, when in processing, a hub 20 is correspondingly placed on the chuck 19, the three jaws clamp the hub 20 from the side surface of the hub 20, clamping blocks on the jaws can be contacted with the hub 20 during clamping, the hub 20 is clamped through multi-point contact, meanwhile, the flexibility of the jaw height can be adapted to the hub 20 to change the position of a clamping point, the clamping precision is greatly improved, the processing precision is improved, the number of waste products is reduced, and the cost is saved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.

Claims

1. The utility model provides a special jack catch of centre gripping wheel hub, is including base claw (1) that is fixed in on chuck (19), its characterized in that: the clamping jaw structure is characterized in that a clamping jaw moving part is fixed on the base jaw (1), the clamping jaw moving part comprises a base jaw seat (4), clamping jaw seats (5) and clamping jaws, the base jaw seat (4) is rotatably installed on the base jaw (1) through a first connecting piece, the clamping jaw seats (5) are provided with two clamping jaw seats, the clamping jaw seats (5) are symmetrically distributed on two sides of the base jaw seat (4), the two clamping jaw seats (5) are rotatably installed on the base jaw seat (4) through a second connecting piece, the clamping jaws comprise an upper clamping jaw (6) and a lower clamping jaw (7), the upper clamping jaw (6) and the lower clamping jaw (7) are symmetrically distributed above and below the clamping jaw seat (5), the upper clamping jaw (6) and the lower clamping jaw (7) are rotatably installed on the clamping jaw seat (5) through a third connecting piece, an upper clamping point block (8) is fixedly arranged on the inner side of the upper clamping jaw (6), the upper clamping point block (8) is provided with two upper clamping point blocks (8) which are distributed along the symmetrical central axis of the upper clamping jaw (6), the inner side surface of the lower clamping jaw (7) is fixedly provided with two lower clamping point blocks (9), and the two lower clamping point blocks (9) are symmetrically distributed along the central axis of the lower clamping jaw (7).

2. The special claw for clamping the wheel hub of the wheel as claimed in claim 1, wherein: the first connecting piece comprises a first pin shaft (10) and a first bolt (11), the first pin shaft (10) is vertically fixed inside the base jaw seat (4), the first bolt (11) is movably inserted into the first pin shaft (10), the lower end of the first bolt (11) is in threaded connection with the base jaw (1), the upper end of the first bolt (11) is located inside the first pin shaft (10), a first clamping surface (12) is arranged inside the first pin shaft (10) and corresponds to the first bolt (11), the head of the first bolt (11) is located above the first clamping surface (12), and the inner diameter of the first clamping surface (12) is smaller than the outer diameter of the head of the first bolt (11).

3. The special claw for clamping the wheel hub of the wheel as claimed in claim 1, wherein: the second connecting piece comprises a second pin shaft (13) and a second bolt (14), the second pin shaft (13) is vertically fixed inside the clamping jaw seat (5), the second bolt (14) is movably inserted into the second pin shaft (13), the lower end of the second bolt (14) is in threaded connection with the side portion of the base jaw seat (4), the upper end of the second bolt (14) is located inside the second pin shaft (13), a second clamping surface (15) is arranged inside the second pin shaft (13) corresponding to the second bolt (14), the head portion of the second bolt (14) is located above the second clamping surface (15), and the inner diameter of the second clamping surface (15) is smaller than the outer diameter of the head portion of the second bolt (14).

4. The special claw for clamping the wheel hub of the wheel as claimed in claim 1, wherein: the connecting piece III comprises a pin shaft III (16) and a bolt III (17), the pin shaft III (16) is vertically fixed inside the clamping jaw, the bolt III (17) is movably inserted into the pin shaft III (16), the lower end of the bolt III (17) is in threaded connection with the clamping jaw seat (5), the upper end of the bolt III (17) is located inside the pin shaft III (16), a clamping surface III (18) is arranged inside the pin shaft III (16) corresponding to the bolt III (17), the head part of the bolt III (17) is located below the clamping surface III (18), and the inner diameter of the clamping surface III (18) is smaller than the outer diameter of the head part of the bolt III (17).