Outer circle grinding clamp for automobile steering device gear

Abstract

The utility model discloses an outer circle grinding clamp of an automobile steering device gear, which is characterized in that the front end of the automobile steering device gear is provided with a special-shaped hole, the rear end of the automobile steering device gear is provided with a central hole, and the outer circle grinding clamp comprises a traction disc arranged on a grinding machine driving rotating disc, a front centre lengthened positioning column arranged on a machine tool and a rear centre positioning column arranged on the machine tool, the front end of the traction disc is installed on a driving rotating disc at the head frame end of a grinding machine, and arc-shaped fixing plates tightly attached to the hole wall of the special-shaped hole are arranged at the rear end of the traction disc close to the edge in an up-down symmetry mode, so that an automobile steering gear is driven to rotate synchronously. The front tip lengthened positioning column penetrates through the horizontal through hole to be inserted into the inner taper hole of the special-shaped hole to achieve front end positioning, the rear tip positioning column is horizontally jacked into the center hole to achieve rear end positioning, and the grinding tool has the advantages that machining of all to-be-ground faces is completed at a time, the time cost and the labor cost are greatly saved, the design structure is ingenious, and the concept is novel.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile steering gears, and in particular relates to an outer circle grinding fixture for automobile steering gears. Background Art

[0002] At present, the external cylindrical grinding of automobile steering gear parts is all carried out on standard external cylindrical grinding machines. However, the existing external cylindrical grinding of automobile steering gear gears adopts the method of fixing the automobile steering gear gear on the left and right sides to keep the axial position fixed, and then clamping the automobile steering gear gear longitudinally to drive the rotation for grinding. However, since the clamping tool itself will occupy the outer contour of the automobile steering gear gear, it is impossible to grind there, and it is impossible to complete the processing of all the grinding surfaces at one time. The automobile steering gear gear needs to be turned around, and then the clamped part before grinding is done, which leads to cumbersome procedures, high labor and time costs, and frequent turning of the automobile steering gear gear is prone to axial positioning failure and the axis cannot be kept horizontally fixed at all times. Utility Model Content

[0003] The utility model aims to provide a clamp for grinding the outer circle of an automobile steering gear gear. The process is simple and the outer contour of the automobile steering gear gear can be ground in one go, thereby solving the problem that the automobile steering gear gear is currently fixed left and right and clamped longitudinally, resulting in the need to turn the automobile steering gear gear around, which is a cumbersome process and has high labor and time costs.

[0004] To this end, the technical solution adopted by the utility model is: a grinding fixture for the outer circle of an automobile steering gear gear, wherein the front end of the automobile steering gear gear is provided with a special-shaped hole, and the rear end is provided with a center hole, comprising a traction disc installed on a driving rotating disc of a grinder, a front center extension positioning column installed on a machine tool, and a rear center positioning column installed on the machine tool, wherein the front end of the traction disc is installed on a driving rotating disc at the end of a headstock of the grinder, and the rear end is symmetrically provided with an arc-shaped fixing plate that is tightly fitted with the wall of the special-shaped hole, thereby driving the automobile steering gear gear to rotate synchronously, a horizontal through hole is provided in the center of the traction disc, the front center extension positioning column passes through the horizontal through hole and is inserted into the tapered hole in the special-shaped hole to realize front end positioning, and the rear center positioning column is horizontally pushed into the center hole to realize rear end positioning, thereby making the axis of the automobile steering gear gear horizontally fixed and axially fixed.

[0005] As a preferred embodiment of the above scheme, the traction disk includes a mounting disk fixedly mounted on the driving rotating disk at the end of the grinding machine headstock and a cylindrical second step centrally fixed on the mounting disk. The arc-shaped fixing plate is symmetrically mounted on the rear end surface of the cylindrical second step. The structural design is reasonable and easy to install.

[0006] Further preferably, the mounting disc is provided with four positioning holes in an annular direction, and the screws provided therewith do not match and are smaller than the positioning holes, so that the traction disc has rotational floating space. Due to technical limitations, the arc-shaped fixing plate and the wall of the special-shaped hole may only fit partially, thereby causing vibration and affecting the grinding accuracy. The traction disc with rotational floating space can flexibly increase the contact surface between the arc-shaped fixing plate and the wall of the special-shaped hole, thereby effectively improving the grinding accuracy and ensuring the processing effect.

[0007] Further preferably, the edge of the rear port of the horizontal through hole is flush with the edge of the inner wall of the arc-shaped fixing plate, and the design is reasonable to ensure that the front top extended positioning column is horizontally inserted into the special-shaped hole.

[0008] It is further preferred that there is a gap of 0.2mm to 0.4mm between the rear part of the front top extended positioning column and the inner wall of the horizontal through hole to avoid that too small a gap affects the rotation of the automobile steering gear and too large a gap affects the grinding accuracy of the automobile steering gear, and the size is reasonable.

[0009] It is further preferred that the rear end of the front center extended positioning column and the front end of the rear center positioning column are both provided with a tapered structure, and the tapered structure of the front center extended positioning column matches the tapered hole inside the special-shaped hole, and the inside of the special-shaped hole is provided with a chamfer to form a tapered hole, and the tapered structure matches the taper of the tapered hole, which is convenient for insertion into the deep end hole of the automobile steering gear for positioning, and the design is reasonable.

[0010] Beneficial effects of the utility model:

[0011] (1) Compared with the two-top and one-clamp fixing method of fixing the automobile steering gear gear on the left and right and clamping the automobile steering gear gear longitudinally, this scheme adopts a front top extended positioning column to pass through the horizontal through hole and insert into the tapered hole in the special-shaped hole to realize front end positioning, and the rear top positioning column is horizontally pushed into the center hole to realize rear end positioning, thereby fixing the end of the automobile steering gear gear on the left and right and making the axis of the automobile steering gear gear horizontally fixed and axially fixed. The arc-shaped fixing plate at the rear end of the traction disc fits tightly with the wall of the special-shaped hole, thereby driving the automobile steering gear gear to rotate synchronously, realizing the processing of all the surfaces to be ground at one time. The concept is novel and ensures that the runout and roundness of the automobile steering gear gear after grinding meet the design standards.

[0012] (2) The traction plate and the front center extended positioning column can effectively meet the requirements of automobile steering gear grinding, and can effectively ensure that the roundness tolerance of the automobile steering gear gear is controlled within 0.002mm, and the automobile steering gear gear runout is within 0.003mm. It combines two clamping and grinding processes, effectively reduces the grinding processing cost of the fan gear, and has an ingenious design structure.

[0013] In summary, the method has the advantages of completing the processing of all grinding surfaces at one time, greatly saving time and labor costs, and having an ingenious design structure and novel conception. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 for Figure 1 sectional view of .

[0016] Figure 3 This is a schematic diagram of the structure of a car steering gear.

[0017] Figure 4 It is a schematic diagram of the structure of the traction disc. DETAILED DESCRIPTION

[0018] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0019] Combination Figure 1 — Figure 4 As shown, a fixture for grinding the outer circle of an automobile steering gear is shown. The front end of the automobile steering gear gear 4 is provided with a special-shaped hole 41, and the rear end is provided with a center hole 42. The fixture for grinding the outer circle is composed of a traction disk 1 installed on the driving rotating disk of the grinder, a front center extension positioning column 2 installed on the machine tool, and a rear center positioning column 3 installed on the machine tool.

[0020] The front end of the traction disc 1 is mounted on the driving rotating disc at the end of the grinding machine headstock, and the rear end is symmetrically provided with an arc-shaped fixing plate 11 that fits closely with the hole wall of the special-shaped hole 41, thereby driving the automobile steering gear 4 to rotate synchronously.

[0021] A horizontal through hole 12 is centrally provided on the traction disk 1 .

[0022] The rear port edge of the horizontal through hole 12 is flush with the inner wall edge of the arc-shaped fixing plate 11 .

[0023] The front top extended positioning column 2 passes through the horizontal through hole 12 and is inserted into the tapered hole in the special-shaped hole 41 to achieve front end positioning.

[0024] The rear top positioning column 3 is pushed into the center hole 42 horizontally to realize rear end positioning, so that the axis of the automobile steering gear 4 is fixed horizontally and axially.

[0025] The traction disc 1 is mainly composed of a mounting disc 13 fixedly mounted on the driving rotating disc at the end of the grinding machine headstock and a cylindrical second step 14 centrally fixed on the mounting disc 13 .

[0026] The mounting disc 13 is provided with four positioning holes 131 in the circumferential direction, and the screws provided therewith do not match and are smaller than the positioning holes 131, so that the traction disc 1 has a rotation floating space.

[0027] The arc-shaped fixing plate 11 is integrally mounted on the rear end surface of the second step 14 of the cylinder symmetrically from top to bottom.

[0028] There is a gap of 0.2 mm to 0.4 mm between the rear portion of the front top extended positioning column 2 and the inner wall of the horizontal through hole 12 .

[0029] The rear end of the front center extended positioning column 2 and the front end of the rear center positioning column 3 are both provided with a tapered structure, and the tapered structure of the front center extended positioning column 2 matches the tapered hole in the special-shaped hole 41 .

[0030] The traction disc 1 is fixed on the driving disc at the end of the grinding machine headstock and rotates and synchronously drives the steering gear 4 of the automobile to rotate.

[0031] The front center extended positioning column 2 is installed in the No. 4 hole of the machine tool headstock mode to ensure the axis and axial fixation of the front end of the automobile steering gear gear 4. The front center extended positioning column 2 is in a fixed state and does not rotate, and there is a reserved gap with the traction disk 1 without interference when rotating.

[0032] The rear top positioning column 3 is located at the rear end of the automobile steering gear gear, and ensures that the axis and axial direction of the rear end of the automobile steering gear 4 gear are fixed, and the overall two-top-one-driving operation mode is realized.

Claims

1. A clamp for grinding the outer circle of a steering gear of an automobile, wherein the front end of the steering gear of the automobile (4) is provided with a special-shaped hole (41) and the rear end is provided with a center hole (42), characterized in that: The invention comprises a traction disc (1) mounted on a driving rotating disc of a grinding machine, a front center extended positioning column (2) mounted on the machine tool, and a rear center positioning column (3) mounted on the machine tool. The front end of the traction disc (1) is mounted on the driving rotating disc at the end of the grinding machine headstock, and the rear end is symmetrically provided with an arc-shaped fixing plate (11) which is closely fitted with the hole wall of the special-shaped hole (41) at the side, thereby driving the steering gear (4) of an automobile to rotate synchronously. The traction disc (1) is centrally provided with a horizontal through hole (12). The front center extended positioning column (2) passes through the horizontal through hole (12) and is inserted into the tapered hole in the special-shaped hole (41) to realize front end positioning. The rear center positioning column (3) is horizontally pushed into the center hole (42) to realize rear end positioning, thereby fixing the axis of the steering gear (4) of the automobile horizontally and axially.

2. The outer circle grinding fixture for automobile steering gear according to claim 1 is characterized in that: The traction disc (1) comprises a mounting disc (13) fixedly mounted on a driving rotating disc at the end of a grinding machine headstock and a cylindrical second step (14) centrally fixed and integrally fixed on the mounting disc (13); the arc-shaped fixing plate (11) is integrally mounted on the rear end surface of the cylindrical second step (14) symmetrically up and down.

3. The outer circle grinding fixture for automobile steering gear according to claim 2 is characterized in that: The mounting disc (13) is provided with four positioning holes (131) in an annular direction, and the screws provided do not match and are smaller than the positioning holes (131), so that the traction disc (1) has a rotational floating space.

4. The outer circle grinding fixture for automobile steering gear according to claim 1 is characterized in that: The edge of the rear port of the horizontal through hole (12) is flush with the edge of the inner wall of the arc-shaped fixing plate (11).

5. The outer circle grinding fixture for automobile steering gear according to claim 1 is characterized in that: There is a gap of 0.2 mm to 0.4 mm between the rear portion of the front top extended positioning column (2) and the inner wall of the horizontal through hole (12).

6. The outer circle grinding fixture for automobile steering gear according to claim 1 is characterized in that: The rear end of the front center extended positioning column (2) and the front end of the rear center positioning column (3) are both provided with a tapered structure, and the tapered structure of the front center extended positioning column (2) matches the tapered hole in the special-shaped hole (41).

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