CN219189463U

CN219189463U - Clamp for machining connecting rod main body

Info

Publication number: CN219189463U
Application number: CN202320237007.XU
Authority: CN
Inventors: 夏新智
Original assignee: TAIZHOU HONGXIN CRANKSHAFT CO Ltd
Current assignee: TAIZHOU HONGXIN CRANKSHAFT CO Ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-06-16
Anticipated expiration: 2033-02-10

Abstract

The utility model provides a clamp for machining a connecting rod main body, and belongs to the technical field of clamps. The clamping device solves the problem of insufficient clamping stability. The positioning device comprises a base and two positioning components which are arranged on the front side of the base and have the same height, a first hydraulic cylinder is further fixed on the base, a piston rod of the first hydraulic cylinder protrudes out of the front side of the base and is fixedly connected with a long-strip-shaped pressing plate which is arranged transversely, the height of the pressing plate is approximately located in the middle of the positioning component, the left end and the right end of the pressing plate are respectively fixedly connected with a strip-shaped pressing block which is arranged vertically, the two pressing blocks are perpendicular to the pressing plate, and the two pressing blocks are respectively located on the front sides of the two positioning components. The clamping device has the advantages of high clamping stability, good positioning effect and the like.

Description

Clamp for machining connecting rod main body

Technical Field

The utility model belongs to the technical field of clamps, and relates to a clamp for machining a connecting rod main body.

Background

Connecting rods are important components in power plants for connecting pistons to a crankshaft, which are capable of transmitting the forces to which the pistons are subjected to the crankshaft and of converting the reciprocating motion of the pistons into rotational motion of the crankshaft. The connecting rod is provided with a large end and a small end, the large end is provided with a large end hole, the small end is provided with a small end hole, the connecting rod is formed by fixing a connecting rod main body and a connecting rod cover by using screws, and the large end hole is formed by connecting the connecting rod main body and the connecting rod cover. As shown in fig. 1, the connecting rod main body 1 is substantially Y-shaped, and includes a head portion 1a and a rod portion 1b, wherein a small end hole of the connecting rod is located at an end portion of the rod portion 1b, an arc surface is provided inside the head portion 1a (an arc surface is also provided inside the connecting rod cover, and a large end hole is formed by the two arc surfaces after the connecting rod main body 1 and the connecting rod cover are fixed), and in order to fix the connecting rod main body 1 and the connecting rod cover by using screws, a screw hole needs to be processed on an end surface of the head portion 1a of the connecting rod main body 1. Thus, clamping and fixing are required by using a clamp.

The Chinese patent discloses a connecting rod joint surface and bolt hole integrated processing clamp with the application number of 201620994921.9, which comprises a base body, wherein a first mounting frame for mounting a connecting rod body (the connecting rod body is a connecting rod main body) and a second mounting frame for mounting a connecting rod cover are arranged on the base body; the first mounting frame comprises a first positioning column arranged on the frame body A and used for positioning one big end (the big end at the position is the head 1a indicated in fig. 1) of the connecting rod body, a first clamping column used for carrying out auxiliary jacking from the other big end side of the connecting rod body is arranged on the opposite side of the first positioning column, a small end mandrel used for positioning and mounting the small end of the connecting rod body (the small end at the position is the end part of the rod part 1b indicated in fig. 1) is further arranged below the first positioning column and the first clamping column of the frame body A, and a first cushion block and a first pressing plate used for positioning and pressing and fixing from two sides of the connecting rod body are further arranged between the first positioning column and the first clamping column of the frame body A. The first pressing plate is in a strip shape arranged transversely, the clamp can simultaneously realize the compression of the two connecting rod bodies by using one first pressing plate, and the production efficiency is improved and the production cost is reduced.

However, since the link bodies are substantially Y-shaped, the first pressing plate in a long strip shape disposed in the lateral direction can be pressed against both the link bodies at the same time, but the effective pressing area acting on each of the link bodies is small, and as can be seen from fig. 2 of the above-mentioned patent specification, there is a problem that the clamping stability is insufficient because the pressing plate is pressed against only the large end of the link body.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides a clamp for machining a connecting rod main body, which solves the problem of insufficient clamping stability.

The aim of the utility model can be achieved by the following technical scheme:

the clamp for machining the connecting rod main body comprises a base and two positioning components which are arranged on the front side of the base and have the same height, wherein a first hydraulic cylinder is further fixed on the base, a piston rod of the first hydraulic cylinder protrudes out of the front side of the base and is fixedly connected with a strip-shaped pressing plate which is transversely arranged along the front side, and the clamp is characterized in that the height of the pressing plate is approximately located in the middle of the positioning component, the left end and the right end of the pressing plate are respectively fixedly connected with a strip-shaped pressing block which is vertically arranged along the pressing plate, the two pressing blocks are perpendicular to the pressing plate, and the two pressing blocks are respectively located on the front sides of the two positioning components.

During clamping, the two connecting rod main bodies are respectively positioned on the corresponding positioning assemblies in a head-up mode, and then the piston rod of the first hydraulic cylinder is controlled to move backwards and drive the pressing plate to press the two connecting rod main bodies on the positioning assemblies. The clamp for machining the connecting rod is characterized in that the height of the pressing plate is adjusted to be approximately located in the middle of the positioning assembly, the pressing blocks which are in strip shape and vertically arranged are fixedly connected to the left end and the right end of the pressing plate respectively, the two pressing blocks are perpendicular to the pressing plate and are located on the front sides of the two positioning assemblies respectively, the pressing blocks are in strip shapes and can be matched with the length of the connecting rod main body, the effective pressing area acting on the connecting rod main body is greatly increased, and the clamping stability of the connecting rod main body is guaranteed.

In the clamp for machining the connecting rod main body, the left side and the right side of the upper end of the pressing block are provided with lugs in a protruding mode, and the rear side faces of the lugs are flush with the rear side faces of the pressing block.

The connecting rod main part is approximately Y type, through the left and right sides protrusion setting ear in briquetting upper end, can increase the effective area of compressing tightly that acts on the head of connecting rod, further improved clamping stability.

In the clamp for machining the connecting rod main body, the pressing block is integrally and fixedly connected with the pressing plate.

In the fixture for machining the connecting rod main body, the positioning assembly comprises a positioning block fixed on the base, a positioning head positioned at the lower side of the positioning block and a sleeving column fixed at the front side of the positioning head, the right side of the positioning block is fixedly connected with a connecting sheet, the connecting sheet stretches out of the positioning block forwards, the part of the connecting sheet stretching out of the positioning block is connected with an adjusting rod along transverse threads, a second hydraulic cylinder is fixed on the left side of the positioning block on the base, and a piston rod of the second hydraulic cylinder and the adjusting rod are arranged at the same center line.

When the hydraulic cylinder is used, the head of the connecting rod main body is propped against the front side surface of the positioning block, the rod part of the connecting rod main body is propped against the front side surface of the positioning head, the small end hole on the rod part of the connecting rod main body is in complete connection with the sleeving column, and finally the piston rod of the second hydraulic cylinder is ejected out and matched with the adjusting rod to position the head of the connecting rod main body transversely. The setting of adopting the second pneumatic cylinder can realize that the head of connecting rod main part is along transversely compressing tightly automatically, compares manual operation tight part in top and will be more convenient, and positioning effect is better moreover.

In the fixture for machining the connecting rod main body, the first through hole is formed in the positioning head along the front-rear direction, the second through hole which is arranged along the same center line with the first through hole is formed in the base, the outer diameter of the sleeving column is larger than that of the first through hole, the connecting rod which sequentially penetrates through the first through hole and the second through hole is fixedly connected with the rear end of the sleeving column, and the locking nut is connected with the rear end portion of the connecting rod in a threaded mode.

In practice, the parallelism between the front side surface of the positioning block and the front side surface of the positioning head is required to be ensured, so that the accuracy of drilling on the end surface of the head of the connecting rod main body can be ensured, and the front side surface of the positioning head needs to be polished when the parallelism deviates. Compared with the structure that the positioning head and the sleeving column are directly arranged as a whole, after the locking nut is disassembled, the sleeving column can be directly pulled out from the positioning head, so that a worker can polish the front side face of the positioning head more conveniently without being limited by the sleeving column.

In the fixture for machining the connecting rod main body, the base comprises a base plate and a connecting plate fixed on the base plate, the positioning assembly is arranged on the connecting plate, and the oil pressure distributor is further fixed on the base plate at the rear side of the connecting plate.

Compared with the prior art, the clamp for machining the connecting rod main body is characterized in that the height of the pressing plate is adjusted to be approximately located in the middle of the positioning assembly, pressing blocks which are in strip shapes and are vertically arranged are fixedly connected to the left end and the right end of the pressing plate respectively, the two pressing blocks are perpendicular to the pressing plate and are respectively located on the front sides of the two positioning assemblies, and therefore the pressing blocks are in strip shapes and can be matched with the length of the connecting rod main body, the effective pressing area acting on the connecting rod main body is greatly increased, and the clamping stability of the connecting rod main body is guaranteed.

Drawings

Fig. 1 is a schematic view of a connecting rod body.

Fig. 2 is a schematic perspective view of a jig for machining the connecting rod body.

Fig. 3 is a front view of the clamp for machining the connecting rod body after the clamp is removed from the clamp.

Fig. 4 is a cross-sectional view taken along A-A in fig. 3.

Fig. 5 is another angular perspective view of the jig for machining the connecting rod body.

Fig. 6 is a schematic perspective view of the clamp for machining the connecting rod body after clamping the connecting rod body.

In the figure, 1, a connecting rod main body; 1a, head; 1b, a rod part; 2. a base; 2a, a substrate; 2b, connecting plates; 2c, a supporting plate; 3. a positioning assembly; 4. a first hydraulic cylinder; 5. a pressing plate; 6. briquetting; 6a, ear parts; 7. a positioning block; 8. a positioning head; 9. sleeving a column; 10. a connecting sheet; 11. an adjusting rod; 12. a second hydraulic cylinder; 13. a connecting rod; 14. a lock nut; 15. an oil pressure distributor.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 2, 3 and 4, the fixture for machining the connecting rod main body comprises a base 2 and two positioning assemblies 3 which are arranged on the front side of the base 2 and have the same height, wherein the base 2 comprises a base plate 2a which is horizontally arranged and a connecting plate 2b which is fixedly connected to the base plate 2a, and the positioning assemblies 3 are arranged on the connecting plate 2 b. The positioning assembly 3 comprises a positioning block 7 fixed on the base 2, a positioning head 8 positioned at the lower side of the positioning block 7 and a sleeving column 9 fixed at the front side of the positioning head 8, wherein the positioning head 8 is cylindrical, and the sleeving column 9 and the positioning head 8 are concentrically arranged. The connecting plate 2b of the base 2 is fixedly provided with a first hydraulic cylinder 4, a piston rod of the first hydraulic cylinder 4 protrudes out of the front side of the base 2 and is fixedly connected with a long-strip-shaped pressing plate 5 which is transversely arranged, and the height of the pressing plate 5 is approximately located in the middle of the positioning assembly 3, namely, in the middle position between the positioning block 7 and the positioning head 8. The left and right ends of the pressing plate 5 are respectively and fixedly connected with a strip-shaped pressing block 6 which is vertically arranged, the two pressing blocks 6 are vertical to the pressing plate 5, namely, the pressing plate 5 and the pressing block 6 form a shape which is approximately H-shaped, and the two pressing blocks 6 are respectively positioned at the front sides of the two positioning assemblies 3. The pressing block 6 is fixedly connected with the pressing plate 5 in an integral mode, lugs 6a are arranged on the left side and the right side of the upper end of the pressing block 6 in a protruding mode, and the rear side faces of the lugs 6a are flush with the rear side faces of the pressing block 6.

Further, as shown in fig. 2, 3, 4 and 5, a connecting piece 10 is fixedly connected to the right side of the positioning block 7, the connecting piece 10 extends out of the positioning block 7 forward, an adjusting rod 11 is connected to the part of the connecting piece 10 extending out of the positioning block 7 along the transverse thread, a second hydraulic cylinder 12 is fixed to the left side of the positioning block 7 on the base 2, and a piston rod of the second hydraulic cylinder 12 is arranged at the same center line as the adjusting rod 11. The positioning head 8 is provided with a first through hole along the front-back direction, a second through hole which is arranged along the same central line with the through hole is arranged on the connecting plate 2b of the base 2, the outer diameter of the sleeving column 9 is larger than that of the first through hole, the rear end of the sleeving column 9 is fixedly connected with a connecting rod 13 which sequentially penetrates through the first through hole and the second through hole, and the rear end part of the connecting rod 13 is in threaded connection with a locking nut 14. After the lock nut 14 is detached, the sleeve joint column 9 can be directly pulled out from the positioning head 8, so that a worker can polish the front side surface of the positioning head 8 more conveniently without being limited by the sleeve joint column 9, and the parallelism between the front side surface of the positioning head 8 and the front side surface of the positioning block 7 is ensured. An oil pressure distributor 15 is fixed on the rear side of the connecting plate 2b on the base plate 2a, the oil pressure distributor 15 is connected with an oil pump and distributes oil pressure to the first hydraulic cylinder 4 and the second hydraulic cylinder 12 according to requirements, and the base 2 further comprises a support plate 2c which is connected between the rear side surface of the connecting plate 2b and the base plate 2a and takes a triangle shape.

During clamping, the two connecting rod bodies 1 are respectively positioned on the corresponding positioning assemblies 3 in a mode that the heads 1a face upwards, specifically, the heads 1a of the connecting rod bodies 1 are abutted against the front side surfaces of the positioning blocks 7, the rod parts 1b of the connecting rod bodies 1 are abutted against the front side surfaces of the positioning heads 8, small end holes in the rod parts 1b of the connecting rod bodies 1 are sleeved outside the sleeved columns 9, then the heads 1a of the connecting rod bodies 1 are transversely positioned by the ejection of the piston rods of the second hydraulic cylinders and the cooperation of the adjusting rods 11, then the piston rods of the first hydraulic cylinders 4 are controlled to move backwards and drive the pressing plates 5 to press the two connecting rod bodies 1 on the positioning assemblies 3, and the state after clamping is completed is shown in fig. 6.

The clamp for machining the connecting rod is characterized in that the height of the pressing plate 5 is adjusted to be approximately located in the middle of the positioning assembly 3, pressing blocks 6 which are in strip shapes and are vertically arranged are fixedly connected to the left end and the right end of the pressing plate 5 respectively, the two pressing blocks 6 are perpendicular to the pressing plate 5, the two pressing blocks 6 are respectively located on the front sides of the two positioning assemblies 3, and therefore the pressing blocks 6 are in strip shapes and can be matched with the length of the connecting rod main body 1, the effective pressing area acting on the connecting rod main body 1 is greatly increased, and the clamping stability of the connecting rod main body 1 is guaranteed. Moreover, the left and right sides of briquetting 6 upper end still bulge respectively is provided with ear 6a, can increase the effective area that compresses tightly that acts on the head 1a of connecting rod main part 1, has further improved clamping stability.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The clamp for machining the connecting rod main body comprises a base (2) and two positioning components (3) which are arranged on the front side of the base (2) and have the same height, wherein the base (2) is also fixedly provided with a first hydraulic cylinder (4), a piston rod of the first hydraulic cylinder (4) protrudes out of the front side of the base (2) and is fixedly connected with a strip-shaped pressing plate (5) which is transversely arranged, and the clamp is characterized in that the pressing plate (5) is approximately positioned in the middle of the positioning components (3), the left end and the right end of the pressing plate (5) are respectively fixedly connected with a strip-shaped pressing block (6) which is vertically arranged, the two pressing blocks (6) are perpendicular to the pressing plate (5), and the two pressing blocks (6) are respectively positioned on the front sides of the two positioning components (3).

2. The clamp for machining the connecting rod main body according to claim 1, wherein the left side and the right side of the upper end of the pressing block (6) are provided with lugs (6 a) in a protruding mode, and the rear side faces of the lugs (6 a) are flush with the rear side faces of the pressing block (6).

3. The clamp for machining the connecting rod main body according to claim 2, wherein the pressing block (6) is integrally fixedly connected with the pressing plate (5).

4. The clamp for machining the connecting rod main body according to claim 1, 2 or 3, characterized in that the positioning assembly (3) comprises a positioning block (7) fixed on the base (2), a positioning head (8) positioned at the lower side of the positioning block (7) and a sleeving column (9) fixed at the front side of the positioning head (8), a connecting sheet (10) is fixedly connected to the right side of the positioning block (7), the connecting sheet (10) extends out of the positioning block (7) forwards, an adjusting rod (11) is connected to the part, extending out of the positioning block (7), of the connecting sheet (10) along transverse threads, a second hydraulic cylinder (12) is fixed on the left side of the positioning block (7) on the base (2), and a piston rod of the second hydraulic cylinder (12) is arranged at the same center line with the adjusting rod (11).

5. The fixture for machining the connecting rod main body according to claim 4, wherein the positioning head (8) is provided with a first through hole along the front-rear direction, the base (2) is provided with a second through hole which is arranged along the same central line with the first through hole, the outer diameter of the sleeve joint column (9) is larger than that of the first through hole, the rear end of the sleeve joint column (9) is fixedly connected with a connecting rod (13) which sequentially penetrates through the first through hole and the second through hole, and the rear end part of the connecting rod (13) is in threaded connection with a locking nut (14).

6. The jig for machining a connecting rod main body according to claim 4, wherein the base (2) comprises a base plate (2 a) and a connecting plate (2 b) fixed to the base plate (2 a), the positioning unit (3) is provided on the connecting plate (2 b), and an oil pressure distributor (15) is further fixed to the base plate (2 a) on the rear side of the connecting plate (2 b).