Axial centering device for rear axle housing

Abstract

The utility model belongs to the technical field of rear axle housing machining, and discloses a rear axle housing axial centering device which comprises a supporting seat connected with a base body, a first oil cylinder, a first rack, a first shaft, a first gear, a second gear, a second rack and a guide seat. The fixed end of the second oil cylinder is fixedly connected with the guide seat, the output end of the second oil cylinder faces the rear axle housing and is fixedly connected with a guide groove body with an isosceles triangle section, the bottom edge of the guide groove body is close to the rear axle housing, and the vertex angle is fixedly connected with the output end of the second oil cylinder; two waists of the guide groove body are respectively provided with a push rod; one ends of the push rods on the two waists are attached to the guide groove body, and the other ends extend out of the guide seat; limiting grooves are formed between the two push rods and the guide base, and the two push rods are arranged in the axial direction of the rear axle housing. According to the utility model, the guide groove body with the isosceles triangle-shaped section and the push rod are arranged to axially center the lute hole of the rear axle housing, so that the centered guide groove body can be ensured to be positioned at the center line of the lute hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to rear axle housing processing technical field especially relates to a rear axle housing axial centering device. BACKGROUND

[0002] For the processing of the pipa hole of the rear axle housing, the rear axle housing is fixed during processing, and the processing of the pipa hole is realized through the rotary motion of the cutter, which requires that the initial pipa hole and the cutter axis are coaxial before processing. The conventional method of making the pipa hole coaxial with the cutter axis is to indirectly realize it by positioning the shaft end of the rear axle housing. However, the distance between the shaft end and the pipa hole is greatly deviated, which leads to uneven allowance of the pipa hole during processing, vibration, tool chipping and other phenomena. In severe cases, the pipa hole allowance is insufficient, causing the rear axle housing to be scrapped.

[0003] As shown in Figure 1 and Figure 2 , the overall structure of the rear axle housing is a hollow cylindrical center, and the cylindrical center extends to the ends of the cylindrical diameter. The cylindrical center of the rear axle housing is initially rough machined, and a circular thin plate is welded at both ends of the cylindrical center. The through hole in the middle of the circular thin plate is the pipa hole, and the end of the circular thin plate away from the cylindrical center of the rear axle housing is the leveling surface. The size of the rear axle housing is generally marked with the pipa hole as the reference to the end surface. In order to reduce the transmission system of the machine tool during processing, the main shaft feed of the pipa hole boring is only completed in the depth direction during the fine processing of the pipa hole after welding. Therefore, the cutter axis at the initial position of the cutter inserted into the pipa hole needs to be coaxial with the axis of the pipa hole. SUMMARY

[0004] In order to solve the problem of large deviation between the cutter axis and the pipa hole of the rear axle housing in the prior art, the utility model provides a rear axle housing axial centering device, which aims to simplify the positioning mechanism of the rear axle housing and accurately perform axial centering.

[0005] The utility model discloses a support seat and base are provided with linear guide rail, and the linear guide rail's guide rail is provided on the base and is fixedly connected with the base, and the sliding block of linear guide rail is fixedly connected with the support seat, and the linear guide rail is horizontally and perpendicularly provided to the axial direction of rear axle housing.

[0006] As further preferred, the support seat and base are provided with linear guide rail, and the linear guide rail's guide rail is provided on the base and is fixedly connected with the base, and the sliding block of linear guide rail is fixedly connected with the support seat, and the linear guide rail is horizontally and perpendicularly provided to the axial direction of rear axle housing.

[0007] As further preferred, the first rack is provided with first adjusting bolt on the support seat away from the one end of first oil cylinder, and the first adjusting bolt is collinear with the first rack and is fixedly connected with the support seat through thread.

[0008] As further preferred, the top angle of guiding groove body and the output end of second oil cylinder are fixed through second connecting screw.

[0009] As further preferred, the first rack is fixedly connected with the output end of first oil cylinder through first connecting screw.

[0010] As further preferred, the second gear and second rack are provided with two groups, and the second gear and second rack of two groups are respectively provided on both sides of first gear and are symmetrically arranged relative to second oil cylinder.

[0011] As further preferred, the contact surface of push rod and guiding groove body is provided with magnetic material.

[0012] As further preferred, the first oil cylinder is double-outlet-rod oil cylinder.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The utility model discloses a guide groove body and push rod structure of section is isosceles triangle structure are set up to the axial centering of the pipa hole of rear axle housing, can guarantee the guide groove body after centering is at the center line of pipa hole, thereby can guarantee the subsequent cutter enters the pipa hole, and the axis of cutter and the axis of pipa hole are collinear.

[0015] 2. The utility model discloses set up linear guide rail and corresponding structure, can convey axial centering mechanism to the position of stipulation, thereby guarantee the smooth progress of subsequent processing. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural diagram of rear axle housing.

[0017] Figure 2 It is the partial section view of pipa hole of rear axle housing.

[0018] Figure 3 It is the overall structure of axial centering device of the utility model and enlarged view.

[0019] Figure 4 It is the A-A section view of Figure 3 .

[0020] Figure 5 It is the partial enlarged schematic view of the pipa hole inside of the axial centering device of the utility model of rear axle housing.

[0021] Indicated in the drawing:

[0022] 1, support seat, 2, first oil cylinder, 3, first connecting screw, 4, first rack, 5, first adjusting bolt, 6, first shaft, 7, second gear, 8, first gear, 9, second rack, 10, second oil cylinder, 11, guide seat, 12, second connecting screw, 13, guide groove body, 14, push rod, 15, linear guide rail. DETAILED DESCRIPTION

[0023] The advantages and characteristics of the utility model will be illustrated and explained by the following non-restrictive preferred embodiments, and these embodiments are given only as examples with reference to the drawings.

[0024] As Figure 1 and Figure 2As shown, the overall structure of the rear axle housing is a hollow cylindrical center, and the cylindrical center extends to both ends of the cylindrical diameter. The cylindrical center of the rear axle housing is initially rough-machined, and then a circular thin plate is welded at both ends of the cylindrical center. The through hole in the middle of the circular thin plate is the pipa hole, and the end of the circular thin plate away from the cylindrical center of the rear axle housing is the leveling plane. The size of the rear axle housing is generally marked with the pipa hole as the reference to the end face, and in order to reduce the transmission system of the machine tool during machining, the spindle feed of the pipa hole is only completed in the depth direction during the finishing machining of the pipa hole. Therefore, the tool axis at the initial position of the tool inserted into the pipa hole needs to be coaxial with the axis of the pipa hole. The axial centering mechanism can ensure that the initial insertion axis of the machining tool is coaxial with the axis of the pipa hole.

[0025] The axial direction of the rear axle housing is along the direction of the two extended ends of the rear axle housing, and the transverse direction of the rear axle housing is perpendicular to the axial direction of the rear axle housing. The transverse direction of the rear axle housing is coaxial with one of the diameters of the cylindrical part of the rear axle housing.

[0026] As shown in Figure 3 and Figure 5 The rear axle housing axial centering device provided by the utility model comprises a supporting seat 1, the supporting seat 1 is connected with a base body, and the base body can be one of the ground, a wall body or a base of a machine tool. In order to facilitate the sliding of the supporting seat 1 on the base body, a linear guide rail 15 is arranged between the supporting seat 1 and the base body, the guide rail of the linear guide rail 15 is arranged on the base body and is fixedly connected with the base body, and the sliding block of the linear guide rail 15 is fixedly connected with the supporting seat 1. The linear guide rail 15 is arranged horizontally and perpendicularly to the axial direction of the rear axle housing.

[0027] When the axial centering of the rear axle housing is needed, the sliding block of the linear guide rail 15 slides towards the rear axle housing, thereby driving the supporting seat 1 to slide towards the rear axle housing; when the supporting seat 1 is moved to the position, the axial centering device starts to work and the axial centering of the rear axle housing is performed. After the axial centering work is completed, the sliding block of the linear guide rail 15 slides away from the rear axle housing, thereby driving the supporting seat 1 to move away from the rear axle housing, so as to avoid the tool, and the tool is inserted into the rear axle housing to machine the pipa hole.

[0028] The rear axle housing axial centering device further comprises a first oil cylinder 2, which is a double-rod oil cylinder, and the output end of the first oil cylinder 2 is horizontally arranged and perpendicular to the axial direction of the rear axle housing. The first oil cylinder 2 is arranged away from the rear axle housing, and the fixed end of the first oil cylinder 2 is fixedly connected with the support seat 1. A first rack 4 is fixedly connected with the output end of the first oil cylinder 2 close to the side of the rear axle housing, and the first rack 4 is preferably fixedly connected with the output end of the first oil cylinder 2 through a first connecting screw 3. The first rack 4 is parallel to the output end of the first oil cylinder 2, that is, the first rack 4 is horizontally arranged and perpendicular to the axial direction of the rear axle housing. The axial centering mechanism 7 further comprises a first shaft 6, which is arranged parallel to the axial direction of the rear axle housing. A first gear 8 is sleeved on the first shaft 6, and the first gear 8 is fixedly connected with the first shaft 6. The first gear 8 is arranged below the first rack 4 and is engaged with the first rack 4. The two ends of the first shaft 6 are connected with the support seat 1 through bearings. A second gear 7 is also sleeved on the first shaft 6, and the second gear 7 is fixedly connected with the first shaft 6. A second rack 9 is engaged with the second gear 7. The second rack 9 is vertically arranged, that is, it is arranged perpendicular to the horizontal plane. A guide seat 11 is fixedly connected with the second rack 9 close to the side of the rear axle housing. A second oil cylinder 10 is arranged above the middle part of the guide seat 11. The fixed end of the second oil cylinder 10 is fixedly connected with the guide seat 11. The output end of the second oil cylinder 10 faces the rear axle housing and is fixedly connected with a guide groove body 13. The cross section of the guide groove body 13 is isosceles triangular. The bottom side of the guide groove body 13 is arranged close to the rear axle housing. The top angle of the guide groove body 13 is fixedly connected with the output end of the second oil cylinder 10 through a second connecting screw 12. In order to make the up-and-down movement of the guide seat 11 more stable, two sets of second gears 7 and second racks 9 can be arranged. The two sets of second gears 7 and second racks 9 are arranged on the two sides of the first gear 8 and are symmetrically arranged relative to the second oil cylinder 10. Push rods 14 are arranged on the two waists of the guide groove body 13. One end of each push rod 14 is in contact with the guide groove body 13, and the other end extends out of the guide seat 11. Limiting grooves are arranged between the two push rods 14 and the guide seat 11, and the two push rods 14 are arranged along the axial direction of the rear axle housing. The two push rods 14 are identical in size. The retraction of the output end of the second oil cylinder 10 can control the upward movement of the guide groove body 13, that is, the movement of the guide groove body 13 towards the second oil cylinder 10. At this time, the two push rods 14 slide along the two waists of the guide groove body 13 and gradually extend out of the guide seat 11. When the push rod 14 on one side contacts the wall of the rear axle housing, the push rod 14 will push the rear axle housing to move axially until the push rod 14 on the other side contacts the wall of the rear axle housing. At this time, the axial centering of the rear axle housing is completed.In order to make the output end of the second oil cylinder 10 extend, the two push rods 14 can be retracted into the guide seat 11 along the two waists of the guide groove 13, a magnetic material can be arranged on the contact surface of the push rod 14 and the guide groove 13, so that the push rod 14 and the waist surface of the guide groove 13 are always attached. In order to ensure that the guide seat 11 can accurately extend into the lute hole of the rear axle housing, a first adjusting bolt 5 can be arranged on the support seat 1 away from the first end of the first oil cylinder 2. The first adjusting bolt 5 is collinear with the first rack 4 and is fixedly connected with the support seat 1 through threads. By arranging the first adjusting bolt 5, the stroke of the first rack 4 can be controlled, so that the depth of the guide seat 11 extending into the lute hole of the rear axle housing is controlled.

[0029] The working principle of the utility model is as follows: firstly, the linear guide rail 15 slides towards the rear axle housing, drives the support seat 1 to move towards the rear axle housing, and reaches the center of the rear axle housing; then, the output end of the first oil cylinder 2 extends, sequentially drives the first gear 8, the first shaft 6, the second gear 7 and the second rack 9 to move, the second rack 9 moves towards the rear axle housing, thereby moving the guide seat 11 into the lute hole of the rear axle housing; next, the output end of the second oil cylinder 10 is retracted, the guide groove body 13 moves upwards, and the two push rods 14 move outwards under the drive of the guide groove body 13; when the push rod 14 on one side contacts the wall of the lute hole of the rear axle housing, the push rod 14 on this side will push the rear axle housing to move axially until the push rod 14 on the other side contacts the wall of the lute hole of the rear axle housing, at which time the axial centering of the rear axle housing is completed; subsequently, the output end of the second oil cylinder 10 extends, the guide groove body 13 moves downwards, and the two push rods 14 move inwards under the drive of the guide groove body 13; the output end of the first oil cylinder 2 is retracted, sequentially drives the first gear 8, the first shaft 6, the second gear 7 and the second rack 9 to move, the second rack 9 moves away from the rear axle housing, and the guide seat 11 moves out of the lute hole of the rear axle housing; finally, the slider of the linear guide rail 15 slides away from the rear axle housing, drives the support seat 1 to move away from the rear axle housing, avoids the cutter, and the cutter extends into the lute hole of the rear axle housing for subsequent finishing machining.

[0030] In addition to the above-mentioned embodiments, the utility model can also have other implementation manners, and any technical scheme formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.

Claims

1. A rear axle housing axial centering device comprising a support seat (1) connected with a base body, characterized in that: The first oil cylinder (2) is arranged at a position away from the rear axle housing, and the fixed end of the first oil cylinder (2) is fixedly connected with the support seat (1); the first shaft (6) is connected with the support seat (1) through bearings at both ends thereof, respectively; the middle portion of the guide seat (11) is provided with a second oil cylinder (10) above, the fixed end of the second oil cylinder (10) is fixedly connected with the guide seat (11), and the output end of the second oil cylinder (10) faces the rear axle housing and is fixedly connected with a guide groove body (13) with an isosceles triangular cross section; the bottom side of the guide groove body (13) is arranged close to the rear axle housing, and the top corner is fixedly connected with the output end of the second oil cylinder (10); the two waists of the guide groove body (13) are respectively provided with push rods (14); one end of the push rod (14) on the two waists is attached to the guide groove body (13), and the other end extends out of the guide seat (11); a limiting groove is arranged between the two push rods (14) and the guide seat (11), and the two push rods (14) are arranged along the axial direction of the rear axle housing.

2. The rear axle housing axial centering device of claim 1, wherein: A linear guide rail (15) is arranged between the support seat (1) and the base body, the guide rail of the linear guide rail (15) is arranged on the base body and is fixedly connected with the base body, the sliding block of the linear guide rail (15) is fixedly connected with the support seat (1), and the linear guide rail (15) is arranged horizontally and perpendicularly to the axial direction of the rear axle housing.

3. The rear axle housing axial centering device of claim 1 wherein: The first adjusting bolt (5) is arranged on the support seat (1) away from the first oil cylinder (2) and is collinear with the first rack (4) and is fixedly connected with the support seat (1) through threads.

4. The rear axle housing axial centering device of claim 1 wherein: The top corner of the guide groove body (13) and the output end of the second oil cylinder (10) are fixed by a second connecting screw (12).

5. The rear axle housing axial centering device of claim 1 wherein: The first rack (4) is fixedly connected with the output end of the first oil cylinder (2) by a first connecting screw (3).

6. The rear axle housing axial centering device of claim 1 wherein: The second gear (7) and the second rack (9) are provided with two groups, and the two groups of the second gear (7) and the second rack (9) are arranged on both sides of the first gear (8) and are symmetrically arranged with respect to the second oil cylinder (10).

7. The rear axle housing axial centering device of claim 1 wherein: The contact surface of the push rod (14) and the guide groove body (13) is provided with a magnetic material.

8. The rear axle housing axial centering device of any one of claims 1-7, wherein: The first oil cylinder (2) is a double-rod oil cylinder.

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