Camshaft support double-station machining clamp for non-driving axle

Abstract

The utility model relates to a double-station machining clamp for a camshaft support for a non-driving axle, and relates to the technical field of machining tools. Comprising a supporting seat, the supporting seat is provided with two machining stations used for machining a left cam shaft support and a right cam shaft support respectively, and a positioning supporting nail, a positioning block, a positioning plate and a sliding pressing assembly are fixed to the supporting seat. The clamp can clamp and process two cam shaft supports at the same time, the two cam shaft supports are positioned on the clamp under the action of a positioning supporting nail, a positioning block and a sliding pressing assembly, the six degrees of freedom of the cam shaft supports are completely limited, and the cam shaft supports can be clamped and processed under the action of a sliding pressing V-shaped block, a pressing plate and a side edge fixing screw rod. According to the cam shaft support machining tool, the cam shaft support is firmly fixed to the supporting seat, displacement and vibration of the cam shaft support in the machining process are prevented, the cam shaft support machining tool has the advantages of being simple in mechanism, good in rigidity, convenient to clamp, firm in clamping and the like, and the machining efficiency and stability of the cam shaft support are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of fixtures, in particular to a double-station machining fixture for a camshaft support of a non-driven axle. Background Technique

[0002] The camshaft support of the non-driven axle is mainly used for the braking system of the non-driven axle. The braking system of the non-driven axle includes: a brake chamber, an adjusting arm, a wheel cylinder bracket, a camshaft bracket, a camshaft support, a brake shoe support, a camshaft, a brake shoe iron assembly, a brake drum, etc. When the vehicle needs to brake, the thrust output by the brake chamber is input to the camshaft through the adjusting arm, and the camshaft then transmits its own torque to the brake shoe iron through its own torque, so that the brake shoe iron and the brake drum generate friction to generate braking force. The function of the camshaft support is to support the camshaft, maintain the position of the camshaft, so that the camshaft only generates torque and does not displace.

[0003] The position of the camshaft support needs to be very precise relative to the adjusting arm and the brake shoe iron assembly. If the position is inappropriate, it may cause the camshaft to break or not generate enough braking torque, resulting in the failure of the axle braking system. The camshaft support is mainly fixed on the axle by welding. Therefore, when machining the camshaft support, the dimensional accuracy of the camshaft hole and the relative position between the camshaft hole and the side welding surface need to be very precise to ensure that the camshaft can be firmly welded to the axle during welding and the relative position with other components is within the qualified range. Summary of the Invention

[0004] The utility model provides a machining fixture for a camshaft support of a non-driven axle with high machining accuracy, which solves the problems of the dimensional accuracy of the round hole and the position accuracy between the round hole and the welding surface during the machining process of the camshaft support.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A double-station machining fixture for a camshaft support of a non-driven axle, the camshaft support includes a round shaft cylinder and a convex arm vertically connected to one side of the round shaft cylinder, characterized in that the double-station machining fixture includes:

[0007] A support seat for fixedly connecting with a machine tool, and two machining stations for respectively machining a left camshaft support and a right camshaft support are arranged at intervals on the support seat;

[0008] Positioning support pins fixed on the support seat for positioning the left camshaft support;

[0009] Positioning blocks fixed on the support seat, and the inner sides of the tails of the convex arms of the left camshaft support and the right camshaft support are respectively positioned on the left and right sides of the positioning blocks;

[0010] A positioning plate, which is fixed on the support seat. The positioning plate is arranged between two processing stations, and a V-shaped positioning head for contacting the outer wall of the circular shaft cylinder of the camshaft support is provided on each of the left and right sides of the positioning plate.

[0011] A sliding pressing assembly, which includes a sliding seat fixed on the support seat. A sliding clamping block capable of sliding relative to the sliding seat is provided on the sliding seat. A V-shaped clamping head is provided at the end of the sliding clamping block. A fixing screw capable of driving the sliding clamping block to slide is in threaded cooperation with the sliding seat. Rotating the fixing screw in one direction drives the sliding clamping block to slide, so that the V-shaped clamping head moves towards the V-shaped positioning head to clamp the outer wall of the circular shaft cylinder of the camshaft support.

[0012] A pressing plate assembly, including a pressing plate shaft fixed on the support seat and a pressing plate capable of sliding along the pressing plate shaft. A pressing plate nut for pressing the pressing plate assembly against the left camshaft support and the right camshaft support is connected to the pressing plate shaft.

[0013] A pressing screw, which is installed on the support seat and is used to press the outer sides of the convex arms of the left camshaft support and the right camshaft support.

[0014] As a preferred embodiment, it is further defined that: there are two left and right positioning V-blocks on the positioning plate, and the V-shaped positioning heads are provided at one end of the positioning V-blocks facing the V-shaped clamping head of the sliding clamping block.

[0015] As a preferred embodiment, it is further defined that: the positioning plate is fixed on the support seat by screws. An installation groove is provided on the positioning plate, and the two left and right positioning V-blocks are arranged back to back in the installation groove.

[0016] As a preferred embodiment, it is further defined that: there are two left and right side fixing screw seats on the support seat. Threaded holes are provided on the pressing screw seats, and the pressing screws are installed into the threaded holes of the pressing screw seats. By rotating the pressing screws, the outer sides of the convex arms of the left camshaft support and the right camshaft support are pressed.

[0017] As a preferred embodiment, it is further defined that: a pressing rod shaft through hole is provided on the support seat, and the pressing plate shaft of the pressing plate assembly passes through the support seat from the back and is fixed on the back of the support seat by screws.

[0018] As a preferred embodiment, it is further defined that: a clamping groove for the sliding clamping block to slide back and forth is provided on the sliding seat, a fixing screw threaded hole for the fixing screw to screw into is provided on the outer side of the sliding seat, the fixing screw threaded hole communicates with the clamping groove, a fixing screw mounting hole aligned with the fixing screw threaded hole for the fixing screw to insert is provided on the outer side of the sliding clamping block, a circular clamping groove is provided at the front end of the fixing screw, a sliding pin mounting hole is provided on the top surface of the sliding clamping block, and a sliding pin that can be clamped into the circular clamping groove of the fixing screw is installed in the sliding pin mounting hole. A sliding seat cover plate for protecting the sliding clamping block is installed on the sliding seat.

[0019] As a preferred embodiment, it is further defined that: the middle part of the pressing plate shaft is a square shaft, and a square counterbore for cooperating with the square shaft so that the pressing plate does not rotate when locked is provided in the middle of the pressing plate.

[0020] As a preferred embodiment, it is further defined that: the pressing plate shaft is arranged between the positioning block and the positioning plate, and the side of the pressing plate abuts against the side wall of the positioning plate when sliding or when sliding in place.

[0021] The processing station is a U-shaped groove provided at the edge of the support seat.

[0022] The beneficial effects of the present utility model are as follows: The camshaft support fixture is provided with two stations and can process two camshaft supports simultaneously. This fixture can clamp and process two camshaft supports at the same time. Through the combined action of the positioning support pins, the positioning block, and the sliding pressing assembly, the six degrees of freedom of the camshaft support are completely restricted. Through the combined action of the sliding pressing V-block, the pressing plate, and the side fixing screw, the camshaft support is firmly fixed on the support seat, preventing the camshaft support from shifting and vibrating during processing. The camshaft support processing fixture has the characteristics of simple structure, good rigidity, convenient clamping, and firm clamping, greatly improving the processing efficiency and stability of the camshaft support. Description of the Drawings

[0023] Figure 1 is one of the structural schematic diagrams of the present utility model;

[0024] Figure 2 is the second structural schematic diagram of the present utility model;

[0025] Figure 3 is one of the exploded views of the present utility model;

[0026] Figure 4 is the second exploded view of the present utility model;

[0027] Figure 5 is the third exploded view of the present utility model;

[0028] Figure 6 is a partial cross-sectional view of the present utility model;

[0029] Figure 7 is a schematic structural diagram of the camshaft support of the present utility model; Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figures 1-7 , the present utility model provides a processing fixture for a camshaft support for a non-driven axle, including a support base 1. There are threaded holes for connecting to a machine tool on the side of the support base 1, which can be installed on the machine tool. On the other side, two processing stations 18 for respectively processing the left camshaft support 16 and the right camshaft support 17 are arranged at intervals. The processing station 18 is designed as a U-shaped groove. The purpose of setting the U-shaped groove is to avoid the cutting tools for processing the two end faces on both sides of the through hole of the pressure rod shaft of the camshaft support. One U-shaped groove represents one processing station. A positioning support pin 2, a positioning block 3, a positioning plate 4, a sliding pressing assembly 90, a pressing screw 15, and a pressing plate assembly 100 are fixed on the support base 1. The camshaft support includes a circular shaft cylinder and a convex arm vertically connected to one side of the circular shaft cylinder. This fixture can clamp and process two such camshaft supports simultaneously.

[0032] Threaded holes for installing various components such as the positioning support pin 2, the positioning block 3, the positioning plate 4, the sliding clamping block assembly 90, and the side fixed screw seat 14 are drilled in the front of the support base 1. There is a through hole for the pressure rod shaft in the middle of the support base 1, and there are installation threaded holes for the pressing plate assembly 100 on the back. The pressing plate shaft 12 passes through the through hole for the pressure rod shaft of the support base 1 and is connected to the support base 1 at the back. The positioning support pin 2 is used to position the camshaft support 16,

[0033] The left and right sides of the positioning block 3 are used to respectively position the inner sides of the tails of the convex arms of the left camshaft support 16 and the right camshaft support 17;

[0034] The positioning plate 4 is arranged between the two processing stations 18. On the left and right sides of the positioning plate 4, there is a V-shaped positioning head for contacting the outer wall of the circular shaft cylinder of the camshaft support;

[0035] The upper surface of the positioning plate 4 has a card slot, and the function of the card slot is to position the positioning V-block 5. The positioning V-block 5 is installed on the upper surface of the positioning plate 4, and the positioning block 3 is installed beside the positioning plate. The positioning plate 4 is fixed on the support seat 1 by screws. An installation groove is provided on the positioning plate 4, and the two left and right positioning V-blocks 5 are arranged back to back in the installation groove.

[0036] The sliding and pressing assembly 90 includes a sliding seat 6 fixed on the support seat 1. A sliding clamping block 7 capable of sliding relative to the sliding seat 6 is provided on the sliding seat 6. A V-shaped clamping head is provided at the end of the sliding clamping block 7. A fixing screw 10 capable of driving the sliding clamping block 7 to slide is in threaded cooperation with the sliding seat 6. Rotating the fixing screw 10 in one direction drives the sliding clamping block 7 to slide, so that the V-shaped clamping head moves towards the V-shaped positioning head to clamp the outer wall of the circular shaft cylinder of the camshaft support.

[0037] The pressing plate assembly 100 includes a pressing plate shaft 12 fixed on the support seat 1 and a pressing plate 11 capable of sliding along the pressing plate shaft 12. A pressing plate nut 13 for pressing the pressing plate assembly 100 against the left camshaft support 16 and the right camshaft support 17 is connected to the pressing plate shaft 12.

[0038] The pressing screw 15 is installed on the support seat 1 and is used to press the outer sides of the convex arms of the left camshaft support 16 and the right camshaft support 17. In order to install the pressing screw 15 better and more stably, two left and right side fixing screw seats 14 are provided on the support seat 1. Threaded holes are provided on the pressing screw seat 14, and the pressing screw 15 is installed in the threaded holes of the pressing screw seat 14. By rotating the pressing rod 15, the outer sides of the convex arms of the left camshaft support 16 and the right camshaft support 17 are pressed.

[0039] See Figure 4 , in order to make the structural design of the sliding and pressing assembly 90 more reasonable and more convenient and fast in operation, a very ingenious design structure is adopted among the sliding seat 6, the sliding clamping block 7, and the fixing screw 10. Specifically as follows: A card slot 95 for the sliding clamping block 7 to slide back and forth is provided on the sliding seat 6. A fixing screw threaded hole 93 for the fixing screw 10 to be screwed into is provided on the outside of the sliding seat 6. The fixing screw threaded hole 93 communicates with the card slot 95. A fixing screw installation hole 91 aligned with the fixing screw threaded hole 9 is provided on the outside of the sliding clamping block 7 for the fixing screw 10 to be inserted. A circular card slot 94 is provided at the front end of the fixing screw 10. A sliding pin installation hole 92 is provided on the top surface of the sliding clamping block 7. A sliding pin 9 capable of being inserted into the circular card slot 94 of the fixing screw 10 is installed in the sliding pin installation hole 92. A sliding seat cover plate 8 for protecting the sliding clamping block 7 is installed on the sliding seat 6.

[0040] The entire sliding compression assembly 90 is installed on the outer sides of the two U-shaped grooves of the support base 1. During installation, the sliding seat 6 is fixedly installed on the support base 1, and the sliding clamping block 7 is slidably installed on the clamping groove 95 on the upper surface of the sliding seat. By rotating the fixing screw 10, the sliding clamping block 7 can slide within the sliding seat 6, causing the V-shaped clamping head to move towards the V-shaped positioning head. The fixed V-shaped groove on the V-shaped clamping head and the movable V-shaped groove at the end of the V-shaped positioning head form a variable clamping groove with a variable diameter, realizing the clamping of the outer wall of the circular shaft cylinder of the camshaft support.

[0041] See Figure 1 and Figure 5 , in order to quickly install the pressing plate shaft 12, a pressing rod shaft through-hole 19 is provided on the support base 1. The pressing plate shaft 12 of the pressing plate assembly 100 passes through the support base 1 from the back and is fixed to the back of the support base 1 using screws. The pressing plate 11 can slide on the pressing plate shaft 12, and the pressing plate 11 can press the left camshaft support 16 and the right camshaft support 17 through the threaded fit of the pressing plate nut 13 and the pressing plate shaft 12. Moreover, a square shaft 101 in the middle section of the pressing plate shaft 12 cooperates with the square counterbore 102 in the middle of the pressing plate 11, preventing the pressing plate 11 from rotating during pressing.

[0042] The pressing plate shaft 12 is arranged between the positioning block 3 and the positioning plate 4, and the side of the pressing plate 11 abuts against the side wall of the positioning plate 4 when sliding or when in place. The pressing screw seat 14 is installed on the left side of the sliding clamping block assembly 90, and the pressing screw 15 is installed on the pressing screw seat 14. By rotating the pressing screw 15, the camshaft support can be fixed.

[0043] See Appendix Figures 1-7 , when the camshaft support processing tooling is working, the cylindrical surface of the left camshaft support 16 is clamped into the V-shaped groove of the positioning V-block 5, the side abuts against the positioning block 3, and the bottom surface abuts against the positioning support pin 2. Manually press it against the positioning support pin 2. The cylindrical surface of the left camshaft support 16 is clamped into the V-shaped groove of the positioning V-block 5. Through the functions of the support pin 2, the positioning block 3, and the positioning V-block 5, the workpiece is positioned on the tooling. After positioning, first rotate the pressing bolt of the sliding clamping block assembly 90 to make the sliding clamping block 7 press the left camshaft support 16. Secondly, rotate the pressing plate nut 13 of the pressing plate assembly 100 to make the pressing plate press the left camshaft support 16 and 17. Finally, rotate the pressing screw to make the pressing screw press the left camshaft support 16 and the right camshaft support 17 from the side. Through the functions of the sliding clamping block assembly 90, the pressing plate assembly 100, and the pressing screw, the left camshaft support 16 and the right camshaft support 17 are firmly fixed on the tooling, preventing displacement and reducing vibration during the machining of the left camshaft support 16 and the right camshaft support 17.

[0044] Only some exemplary embodiments of the present utility model are described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A double-station processing fixture for a camshaft support for a non-driven axle, the camshaft support comprising a round shaft cylinder and a convex arm connected to one side of the round shaft cylinder and vertically connected thereto, characterized in that: The double-station processing fixture comprises: A support seat (1) is used for fixed connection with a machine tool, and two processing stations (18) for processing a left camshaft support seat (16) and a right camshaft support seat (17) are arranged at intervals on the support seat (1); A positioning support pin (2) fixed on the support seat (1) and used for positioning the left camshaft support (16); A positioning block (3) is fixed on the support seat (1), and the left and right sides of the positioning block (3) are used to respectively position the inner sides of the tails of the cam arms of the left camshaft support (16) and the right camshaft support (17); A positioning plate (4) fixed on the support seat (1), the positioning plate (4) being arranged between two processing stations (18), and a V-shaped positioning head for contacting the outer wall of the camshaft support cylindrical cylinder is provided on the left and right sides of the positioning plate (4); A sliding clamping assembly (90) comprises a sliding seat (6) fixed on the support seat (1), a sliding clamping block (7) capable of sliding relative to the sliding seat (6) being provided on the sliding seat (6), a V-shaped clamping head being provided at the end of the sliding clamping block (7), a fixing screw (10) being threadedly engaged on the sliding seat (6) and capable of driving the sliding clamping block (7) to slide, and rotating the fixing screw (10) in one direction drives the sliding clamping block (7) to slide, so that the V-shaped clamping head moves toward the V-shaped positioning head to clamp the outer wall of the camshaft support cylindrical shaft cylinder; A pressure plate assembly (100) comprising a pressure plate shaft (12) fixed on the support seat (1) and a pressure plate (11) capable of sliding along the pressure plate shaft (12); a pressure plate nut (13) for pressing the pressure plate assembly (100) onto a left camshaft support (16) and a right camshaft support (17) is connected to the pressure plate shaft (12); A compression screw (15) is mounted on the support seat (1) and is used to compress the outer sides of the cam arms of the left camshaft support (16) and the right camshaft support (17).

2. A double-station processing fixture for a camshaft support for a non-driven axle according to claim 1, characterized in that: Two left and right positioning V blocks (5) are provided on the positioning plate (4), and one end of the positioning V block (5) facing the V-shaped clamping head of the sliding clamping block (7) is provided with the V-shaped positioning head.

3. A double-station processing fixture for a camshaft support for a non-driven axle according to claim 2, characterized in that: The positioning plate (4) is fixed to the support seat (1) by means of screws, a mounting groove is provided on the positioning plate (4), and the left and right positioning V blocks (5) are arranged in the mounting groove in a back-to-back manner.

4. A double-station processing fixture for a camshaft support for a non-driven axle according to claim 1, characterized in that: The support seat (1) is provided with two left and right side fixing screw seats (14), and the clamping screw seat (14) is provided with a threaded hole. The clamping screw (15) is installed in the threaded hole of the clamping screw seat (14), and the outer side of the convex arm of the left camshaft support (16) and the outer side of the convex arm of the right camshaft support (17) are clamped by rotating the clamping screw (15).

5. A double-station processing fixture for a camshaft support for a non-driven axle according to claim 1, characterized in that: A pressure rod shaft through hole (19) is provided on the support seat (1), and the pressure plate shaft (12) of the pressure plate assembly (100) passes through the support seat (1) from the back and is fixed to the back of the support seat (1) using screws.

6. A double-station processing fixture for a camshaft support for a non-driven axle according to claim 1, characterized in that: The sliding seat (6) is provided with a slot (95) for the sliding clamping block (7) to slide back and forth. The outer side of the sliding seat (6) is provided with a fixing screw threaded hole (93) for the fixing screw (10) to be screwed in, and the fixing screw threaded hole (93) is communicated with the clamping groove (95). The outer side of the sliding clamping block (7) is provided with a fixing screw mounting hole (91) aligned with the fixing screw threaded hole (93) for the fixing screw (10) to be inserted. A circular clamping groove (94) is provided at the front end of the fixing screw (10). A sliding pin mounting hole (92) is provided on the top surface of the sliding clamping block (7). A sliding pin (9) that can be clamped into the circular clamping groove (94) of the fixing screw (10) is installed in the sliding pin mounting hole (92). A sliding seat cover plate (8) for protecting the sliding clamping block (7) is installed on the sliding seat (6).

7. A double-station processing fixture for a camshaft support for a non-driven axle according to claim 3, characterized in that: The middle section of the pressing plate shaft (12) is a square shaft (101), and a square countersunk hole (102) is provided in the middle of the pressing plate (11) and cooperates with the square shaft (101) so that the pressing plate (11) will not rotate when locked.

8. A double-station processing fixture for a camshaft support for a non-driven axle according to claim 7, characterized in that: The pressure plate shaft (12) is arranged between the positioning block (3) and the positioning plate (4), and the side edge of the pressure plate (11) abuts against the side wall of the positioning plate (4) when sliding or when sliding into place.

9. A double-station processing fixture for a camshaft support for a non-driven axle according to claim 1, characterized in that: The processing station (18) is a U-shaped groove arranged at the edge of the support seat.

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