Tool clamp for milling shifting opening of shifting fork shaft

Abstract

A tool clamp for milling a shifting opening of a shifting fork shaft relates to the technical field of tool clamps and comprises a bottom plate, a supporting seat and a bolt seat are arranged on the bottom plate, the shifting fork shaft can penetrate through the supporting seat and the bolt seat, the supporting seat and the bolt seat are arranged in a spaced mode, the front end face of the supporting seat and the front end face of the bolt seat are connected through a pressing plate, and a pressing screw used for abutting against the shifting fork shaft is arranged on the pressing plate. Two outer wall holes are formed in the outer wall face of the shifting fork shaft in the axial direction at intervals, two inserting holes are formed in the top end face and the front end face of the bolt base respectively, and the shifting fork shaft is rotated so that the outer wall holes of the shifting fork shaft can be aligned with the inserting holes in the top end face of the bolt base or the inserting holes in the front end face of the bolt base. A limiting component used for abutting against the end face of the shifting fork shaft is further installed on the bottom plate far away from the bolt base. According to the invention, shifting opening milling of two angles of the shifting fork shaft can be completed on one set of fixture, so that the step of replacing the fixture in the traditional method is avoided, the processing time is greatly shortened, the production efficiency is improved, and the equipment investment and maintenance cost are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tooling and fixtures, and in particular to a tooling and fixture used for milling a shifting opening of a shifting fork shaft. Background Art

[0002] The fork shaft is a component in the car's steering system. It is located on the steering knuckle and works with the steering knuckle to achieve the steering of the wheels. The fork shaft is usually connected to the steering rod. When the driver turns the steering wheel, the force is transmitted to the fork shaft through the steering system, which in turn pushes the steering knuckle to make the wheels turn.

[0003] In the field of machining, the surface of the fork shaft usually needs to be milled with multiple grooves in two angular directions (such as Figure 1 In the traditional fork shaft processing technology, in order to mill these shifting holes on the surface of the fork shaft, two different sets of fixtures are usually used for processing. First, the fork shaft is fixed with the first set of fixtures and the first batch of shifting holes are milled. After completing this step, the fork shaft needs to be removed from the first set of fixtures and transferred to the second set of fixtures to mill the second batch of shifting holes at different angles.

[0004] Since the fork shaft needs to be transferred between two sets of fixtures, it not only increases the operation time, but also leads to a decrease in production efficiency. In addition, during the transfer from one set of fixtures to another, positioning deviation is prone to occur, which affects the processing accuracy, especially in the shifting processing that requires high precision. And using two sets of fixtures means more equipment investment, which increases production costs. Summary of the invention

[0005] The purpose of the present invention is to provide a tooling fixture for milling a shift fork shaft shifting notch, so as to complete the shift fork shaft surface two angles of the shift fork shaft milling by a set of fixtures.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a tooling fixture for milling a shift fork shaft shift port, comprising a base plate, the base plate being provided with a support seat and a pin seat for the shift fork shaft to pass through, the support seat and the pin seat being arranged at intervals and the front end faces of the two being connected by a clamping plate, the clamping plate being provided with a clamping screw for resisting the shift fork shaft, the outer wall surface of the shift fork shaft being arranged at intervals along the axial direction, the top end face and the front end face of the pin seat being provided with two insertion holes, and the shift fork shaft can be rotated to align its outer wall hole with the insertion hole on the top end face of the pin seat or the insertion hole on the front end face of the pin seat, and a pin is inserted into the base plate to limit the rotation of the shift fork shaft and enable the portion of the shift fork shaft to be milled to face upward, and a limiting component for resisting the end face of the shift fork shaft is also installed on the base plate away from the pin seat.

[0007] Preferably, the clamping plate located at the front end surface of the latch seat is also provided with an avoidance groove to prevent the plug hole from being blocked.

[0008] More preferably, the limiting component includes a top seat installed on the base plate, a top nut fixedly connected to one end of the top seat and a top column threadedly connected to the top nut, one end of the top column passes through the top seat and is provided with a top portion for resisting the end face of the fork shaft.

[0009] More preferably, the bottom plate is provided with a backing plate along its length direction, and the rear end of the support seat, the rear end of the latch seat and the rear end of the top seat all abut against the backing plate.

[0010] More preferably, the holes of the support seat and the latch seat for the fork shaft to pass through are all special-shaped holes, and the front side of the special-shaped hole is arc-shaped and the rear side is V-shaped.

[0011] Compared with the prior art, the present invention can complete the milling of the shifting fork shaft at two angles on a set of fixtures, avoiding the need to replace the fixtures in the traditional method, greatly reducing the processing time, improving production efficiency, and reducing equipment investment and maintenance costs. In addition, since the workpiece does not need to be clamped multiple times between the two sets of fixtures, the positioning deviation can be reduced, thereby improving the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the fork shaft; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the workpiece clamping state during the first processing in the embodiment; Figure 4 This is a schematic diagram of the workpiece clamping state during the second processing in the embodiment; Figure 5 Schematic diagram of the structure of the support base in the embodiment.

[0013] In the figure: 1——base plate 2——fork shaft 3——support seat 4——Latch seat 5——Pressure plate 6——Pressure screw 7——Outer wall hole 8——Pin 9——Avoidance groove 10——Top seat 11——Top nut 12——Top column 13——Lean on the board. DETAILED DESCRIPTION

[0014] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0015] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact through another feature between them.

[0016] like Figure 2 As shown, a tooling fixture for milling a shift fork shaft shift opening comprises a base plate 1, on which a support seat 3 and a latch seat 4 for the shift fork shaft 2 to pass are provided, the support seat 3 and the latch seat 4 are arranged at intervals and the front end faces of the two are connected by a clamping plate 5, on which a clamping screw 6 for resisting the shift fork shaft 2 is provided, and the outer wall surface of the shift fork shaft 2 is arranged with two outer wall holes 7 at intervals along the axial direction, and the top end surface and the front end surface of the latch seat 4 are both provided with two insertion holes, and by rotating the shift fork shaft 2, the outer wall hole 7 can be aligned with the insertion hole on the top end surface of the latch seat 4 or the insertion hole on the front end surface of the latch seat 4, and when the outer wall hole 7 and the insertion hole are aligned, a latch pin 8 is inserted to limit the rotation of the shift fork shaft 2 and enable the shift fork shaft 2 to face the part to be milled upward, and a limiting component for resisting the end face of the shift fork shaft 2 is also installed on the base plate 1 away from the latch seat 4.

[0017] In the above structure, the pressing plate 5 located at the front end surface of the latch seat 4 is also provided with an avoidance groove 9 to prevent the plug hole from being blocked.

[0018] Furthermore, the limiting component includes a top seat 10 mounted on the bottom plate 1, a top nut 11 fixedly connected to one end of the top seat 10, and a top column 12 threadedly connected to the top nut 11, one end of the top column 12 passes through the top seat 10 and is provided with a top portion for abutting against the end face of the fork shaft 2. The top portion directly abuts against the end face of the fork shaft 2, providing precise positioning, which helps to improve the accuracy of milling processing.

[0019] In this embodiment, a backing plate 13 is provided along the length direction of the base plate 1, and the rear end of the support seat 3, the rear end of the pin seat 4 and the rear end of the top seat 10 all abut against the backing plate 13. The backing plate 13 provides a common supporting surface for the support seat 3, the pin seat 4 and the top seat 10, so that the entire fixture is more stable during the processing and reduces the error caused by vibration or external force.

[0020] In addition, if Figure 5As shown, the holes of the support seat 3 and the pin seat 4 for the fork shaft 2 to pass through are all special-shaped holes, the front side of the special-shaped hole is arc-shaped and the rear side is V-shaped. The design of the special-shaped hole, especially the arc-shaped front side and the V-shaped rear side, can better provide positioning effect and reduce friction and wear of the fork shaft 2 when rotating in the hole to a certain extent.

[0021] The workflow of using the fixture for milling the shift fork shaft provided in the above embodiment to clamp the workpiece for milling is as follows: Pass the fork shaft 2 through the special-shaped holes of the support seat 3 and the pin seat 4 until one end of the fork shaft 2 abuts against the top of the top column 12, ensure that the outer wall hole of the fork shaft 2 is aligned with the insertion hole of the front end surface of the pin seat 4, and then insert the pin 8 to lock the fork shaft 2 (such as Figure 3 As shown), then the pressing screw 6 on the pressing plate 5 applies appropriate pressure to the fork shaft 2 to fix it between the support seat 3 and the latch seat 4. After the fork shaft 2 is fixed, the milling machine is started to mill the fork shaft 2 to be milled.

[0022] After the first milling is completed, temporarily turn off the milling machine and retract the tool, then loosen the clamping screw 6, pull out the latch 8, and then rotate the fork shaft 2 to ensure that the outer wall hole of the fork shaft 2 is aligned with the socket on the top surface of the latch seat 4, and then insert the latch 8 to lock the fork shaft 2 (such as Figure 4 As shown), then the pressing screw 6 on the pressing plate 5 applies appropriate pressure to the fork shaft 2 to fix it between the support seat 3 and the latch seat 4. After the fork shaft 2 is fixed, the milling machine is started to mill the other angle of the fork shaft 2 to be milled. After the processing is completed, the milling machine can be turned off and the tool can be withdrawn, and then the pressing screw 6 can be loosened, the latch 8 can be pulled out, and the fork shaft 2 can be taken out to complete the processing.

[0023] The tooling fixture of the present invention realizes the milling of two-angle shifting holes of the fork shaft on a single fixture through ingenious design. The principle is to utilize the special-shaped hole design of the support seat 3 and the latch seat 4, cooperate with the clamping plate 5 and the clamping screw 6, and the restriction of the latch 8 to achieve stable clamping of the fork shaft; by rotating the fork shaft and re-fixing it, the shifting holes of different angles can be turned upward in turn, which is convenient for milling. This design not only improves the processing efficiency and accuracy, reduces the tedious steps of fixture replacement, reduces production costs, but also enhances the versatility of the fixture and the ease of operation, and significantly improves the overall performance and stability of the fork shaft processing.

[0024] In order to make it easier for ordinary technicians in the field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and the above-mentioned embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A fixture for milling a shift fork shaft shift hole, comprising a base plate (1), characterized in that: The bottom plate (1) is provided with a support seat (3) and a latch seat (4) for the shift fork shaft (2) to pass through, the support seat (3) and the latch seat (4) are arranged at intervals and the front end surfaces of the two are connected by a clamping plate (5), the clamping plate (5) is provided with a clamping screw (6) for supporting the shift fork shaft (2), the outer wall surface of the shift fork shaft (2) is provided with two outer wall holes (7) at intervals along the axial direction, and the top end surface and the front end surface of the latch seat (4) are both provided with There are two insertion holes. By rotating the shift fork shaft (2), the outer wall hole (7) can be aligned with the insertion hole on the top surface of the latch seat (4) or the insertion hole on the front surface of the latch seat (4). When the outer wall hole (7) and the insertion hole are aligned, a latch (8) is inserted to limit the rotation of the shift fork shaft (2) and enable the shifting hole portion of the shift fork shaft (2) to be milled to face upward. A limiting component for abutting against the end surface of the shift fork shaft (2) is also installed on the bottom plate (1) away from the latch seat (4).

2. The fixture for milling a shift fork shaft shift hole according to claim 1, characterized in that: The pressing plate (5) located at the front end surface of the latch seat (4) is also provided with an avoidance groove (9) for preventing the insertion hole from being blocked.

3. The fixture for milling a shift fork shaft shift hole according to claim 1, characterized in that: The limiting component comprises a top seat (10) mounted on a base plate (1), a top nut (11) fixedly connected to one end of the top seat (10), and a top column (12) threadedly connected to the top nut (11); one end of the top column (12) passes through the top seat (10) and is provided with a top portion for abutting against the end face of the fork shaft (2).

4. The fixture for milling a shift fork shaft shift hole according to claim 3, characterized in that: The bottom plate (1) is provided with a backing plate (13) along its length direction, and the rear end of the support seat (3), the rear end of the latch seat (4) and the rear end of the top seat (10) all abut against the backing plate (13).

5. The fixture for milling a shift fork shaft shift hole according to any one of claims 1 to 4, characterized in that: The holes in the support seat (3) and the latch seat (4) for the fork shaft (2) to pass through are all special-shaped holes, the front side of the special-shaped hole is in an arc shape, and the rear side is in a V shape.

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