Fixing tool for yoke machining

Abstract

The utility model provides a fixing tool for processing a joint fork, which comprises a working table, a boss and an L-shaped block are fixed on the working table, an abutting block is fixed on the inner side of the L-shaped block and on the surface opposite to the boss, the abutting block is detachably connected with an inserting rod, and the inserting rod is used for being inserted into two lug holes positioned on the same axis on the joint fork; a positioning shaft core capable of moving towards the abutting block penetrates through the boss, a protruding part is arranged on the face, close to the abutting block, of the positioning shaft core, a positioning rod is fixed to the protruding part, and open grooves which communicate with one another are formed in one side of the positioning rod, one side of the protruding part and one side of the positioning shaft core; a hydraulic cylinder used for driving the positioning shaft core is arranged on the workbench. After the yoke is fixed once, the locking hole and the opening of the yoke can be machined, different fixing tools are not needed, and the machining efficiency of the yoke is improved.

Description

Technical Field

[0001] This utility model relates to the field of fixed tooling technology, and in particular to a fixed tooling for machining forks. Background Technology

[0002] A swivel fork (also known as a universal joint fork) is used in universal joints (such as automotive drive shafts) to connect two shafts and transmit power, allowing for a certain angle of deflection. As an important component of the steering system, the quality of the swivel fork directly affects the vehicle's handling performance and driving safety. During machining, the swivel fork needs to be fixed to a fixture to prevent displacement during processing. Currently, the machining process for swivel forks involves first machining the locking hole (tool steps: φ8.7 alloy drill, φ10.5 alloy drill, φ12 centering drill, milling the φ20.3 mounting surface), and then using a φ100X3.2 clamp-on saw blade to saw the 3.2 opening. The locking hole and the opening require different fixtures and two fixing processes, reducing the machining efficiency of the swivel fork. Utility Model Content

[0003] This utility model discloses a fixing fixture for machining fork sections, which solves the problem that different fixing fixtures are needed for machining locking holes and openings, and that fixing is required twice, which reduces the machining efficiency of fork sections.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A fixed fixture for machining a fork includes a worktable with a boss and an L-shaped block fixed on it. A stop block is fixed on the inner side of the L-shaped block opposite to the boss. A rod is detachably connected to the stop block for inserting into two ear holes on the fork located on the same axis. A positioning shaft that can move toward the stop block passes through the boss. The side of the positioning shaft near the stop block has a protrusion with a positioning rod fixed on it. A slot is opened on one side of the positioning rod, the protrusion, and the positioning shaft. A hydraulic cylinder for driving the positioning shaft is provided on the worktable.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] The fork is positioned by fitting the opening between the two ear holes onto the positioning rod, bringing the fork into contact with the protrusion. After removing the insert rod from the L-shaped block, it is then inserted into the two ear holes on the fork that are aligned with the same axis. The hydraulic cylinder is then activated to drive the positioning shaft towards the stop block. Once the stop block enters the inside of the fork, it holds the insert rod in place, thus fixing the fork. Subsequently, a cutting tool can be used to machine the locking hole on the fork. After the locking hole is machined, a saw blade can be used to machine the opening on the fork. When the saw blade is machining the opening, it can enter the slots on the positioning rod, the protrusion, and the positioning shaft to complete the opening machining of the fork. This invention allows for the machining of the locking hole and the opening after the fork is fixed once, eliminating the need for different fixing fixtures and improving the machining efficiency of the fork. Attached Figure Description

[0008] Figure 1 This is a front view structural diagram of the present invention;

[0009] Figure 2 This is a top view of the structure of the workbench of this utility model;

[0010] Figure 3 This is a cross-sectional structural schematic diagram of the rubber sleeve of this utility model;

[0011] Figure 4 This is a schematic diagram of the cross-section of the fork.

[0012] In the diagram: 1. Workbench; 2. Boss; 3. L-shaped block; 31. Abutment block; 32. Arc-shaped block; 4. Positioning shaft; 41. Protrusion; 42. Positioning rod; 43. Groove; 5. Hydraulic cylinder; 51. Support frame; 6. Insert rod; 61. Rubber sleeve; 7. Slag discharge port; 8. Collection box. Detailed Implementation

[0013] The specific content of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0014] like Figure 1 , Figure 2 and Figure 3As shown, this utility model provides a fixed fixture for machining a fork, including a worktable 1. A boss 2 and an L-shaped block 3 are fixed on the worktable 1. A stop block 31 is fixed on the inner side of the L-shaped block 3 opposite to the boss 2. A plug rod 6 is detachably connected to the stop block 31. The plug rod 6 is used to insert into two ear holes on the fork located on the same axis. A positioning shaft core 4 that can move toward the stop block 31 passes through the boss 2. A protrusion 41 is provided on the side of the positioning shaft core 4 near the stop block 31. A positioning rod 42 is fixed on the protrusion 41. A slot 43 is opened on one side of the positioning rod 42, the protrusion 41 and the positioning shaft core 4. A hydraulic cylinder 5 for driving the positioning shaft core 4 is provided on the worktable 1. The L-shaped block 3, the positioning shaft core 4, and the hydraulic cylinder 5 are each provided in a set. The opening between the two ear holes of the fork is fitted onto the positioning rod 42. The protrusion 41 is integrally formed with the positioning shaft core 4, so that the fork contacts the protrusion 41. The insertion rod 6 is removed from the L-shaped block 3 and then inserted into the two ear holes on the fork located on the same axis. Then, the hydraulic cylinder 5 is activated to drive the positioning shaft core 4 to move toward the abutment block 31. The abutment block 31 enters the inside of the fork and abuts the insertion rod 6, thus completing the fixation of the fork. Subsequently, a cutting tool can be used to machine the locking holes of the fork. After the locking holes are machined, a saw blade can be used to machine the openings of the fork. When the saw blade machines the openings of the fork, it can enter the slots on the positioning rod, the protrusion, and the positioning shaft to complete the opening machining of the fork. The setup of a set of L-shaped blocks 3, positioning shaft 4, and hydraulic cylinder 5 allows several forks to be fixed separately, and then the locking holes and openings of the forks can be machined sequentially, improving the machining efficiency of the forks.

[0015] like Figure 1 and Figure 2 As shown, an arc-shaped block 32 is fixed to the inner side of the L-shaped block 3, away from the abutment block 31. A slag discharge port 7 is provided on the workbench 1, and a collection box 8 is placed below the workbench 1. The two sides (front and back) of the L-shaped block 3 are shown. Figure 1 All locations shown in the diagram are equipped with slag discharge ports 7. The debris generated during the forklift processing falls onto the arc-shaped block 32 and then slides down through the slag discharge ports 7 into the collection box 8, which can effectively collect the debris.

[0016] like Figure 1 and Figure 3 As shown, the diameter of the insertion end of the insertion rod 6 is smaller than that of the other end of the insertion rod 6, and a rubber sleeve 61 is fixed on the insertion rod 6. The insertion rod 6 includes a rod body and a large head. The diameter of one end of the rod body is smaller than that of the other end, and the large head is fixed to the end with the larger diameter. The diameter of the large head is larger than the inner diameter of the ear hole on the joint fork. After the insertion rod 6 is inserted into the two ear holes on the joint fork that are located on the same axis, the rubber sleeve 61 contacts the inner wall of the ear hole, which can protect the inner wall of the ear hole and increase the friction between the insertion rod 6 and the inner wall of the ear hole.

[0017] like Figure 1 and Figure 2 As shown, a support frame 51 is fixed on the workbench 1, and the fixed end of the hydraulic cylinder 5 is fixed on the support frame 51. The boss 2 is located between the hydraulic cylinder 5 and the L-shaped block 3. The support frame 51 can fix the hydraulic cylinder 5, and the telescopic end of the hydraulic cylinder 5 is fixed to the end of the positioning shaft 4 away from the abutment block 31. After the hydraulic cylinder 5 is started, the positioning shaft 4 can move towards the abutment block 31.

[0018] like Figure 1 As shown, the L-shaped block 3 has a through hole for inserting the rod 6. The through hole on the L-shaped block 3 makes it easy for staff to place the rod 6 when it is not in use, preventing the rod 6 from being lost due to careless placement.

[0019] like Figure 1 As shown, the abutment 31 has a V-shaped groove on the side near the positioning rod 42. The V-shaped groove on the abutment 31 allows the abutment 31 to better abut and fix the rod 6 after it enters the groove.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fixed fixture for machining a fork section, comprising a worktable (1), characterized in that: A boss (2) and an L-shaped block (3) are fixed on the worktable (1). A stop block (31) is fixed on the inner side of the L-shaped block (3) opposite to the boss (2). A plug rod (6) is detachably connected to the stop block (31). The plug rod (6) is used to insert into two ear holes on the fork located on the same axis. A positioning shaft core (4) that can move toward the stop block (31) passes through the boss (2). A protrusion (41) is provided on the side of the positioning shaft core (4) near the stop block (31). A positioning rod (42) is fixed on the protrusion (41). A connected slot (43) is opened on one side of the positioning rod (42), the protrusion (41) and the positioning shaft core (4). A hydraulic cylinder (5) for driving the positioning shaft core (4) is provided on the worktable (1).

2. The fixing fixture for machining a fork section according to claim 1, characterized in that: An arc-shaped block (32) is fixed on the inner side of the L-shaped block (3) away from the abutment block (31). A slag discharge port (7) is opened on the workbench (1), and a collection box (8) is placed below the workbench (1).

3. The fixing fixture for machining a fork section according to claim 1, characterized in that: The diameter of the insertion end of the insertion rod (6) is smaller than that of the other end of the insertion rod (6), and a rubber sleeve (61) is fixed on the insertion rod (6).

4. The fixing fixture for machining a fork section according to claim 1, characterized in that: A support frame (51) is fixed on the workbench (1), the fixed end of the hydraulic cylinder (5) is fixed on the support frame (51), and the boss (2) is located between the hydraulic cylinder (5) and the L-shaped block (3).

5. The fixing fixture for machining a fork section according to claim 1, characterized in that: The L-shaped block (3) has a through hole for inserting the rod (6).

6. The fixing fixture for machining a fork section according to claim 1, characterized in that: The abutment (31) has a V-shaped groove on the side near the positioning rod (42).

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