Pad selecting device for half axle gear of differential mechanism

Abstract

The utility model provides a differential mechanism half axle gear pad selecting device which comprises a differential mechanism positioning plate and a positioning assembly, and a differential mechanism is fixedly installed on the differential mechanism positioning plate. The positioning assembly comprises a mandrel, an expansion sleeve and a positioning sleeve; the upper part of the expansion sleeve penetrates into the positioning sleeve from top to bottom; the mandrel penetrates into the expansion sleeve from top to bottom in a screw joint manner; the lower portion of the expansion sleeve penetrates into the differential mechanism, and the expansion sleeve can be attached to a half axle gear of the differential mechanism after being expanded. Through the above structure, the device can directly, rapidly and accurately measure the differential half axle gear clearance. And the expansion sleeve is connected with the half axle gear after being expanded, and drives the half axle gear to move within the backlash range. The accurate gap value can be directly obtained by measuring the movement amount of the expansion sleeve through the depth gauge, tedious measurement and calculation are not needed any more, and the accuracy and stability of pad selection operation are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile differential, especially relates to a differential half axle gear pad selecting device. BACKGROUND

[0002] In the transmission system of the vehicle, the differential is an important component for transmitting torque, and its function is to make the left and right half axles realize different rotating speeds to realize the requirement of the vehicle stable turning. The matching degree of the differential gear backlash determines the service life of the differential gear and the shell, and also affects the comfort of the vehicle driving. The differential half axle gear pad selecting process is involved in the differential.

[0003] In the prior art, since there is no suitable pad selecting device, the size of the shell and the half axle gear needs to be measured before the differential is assembled, the end face of the shell to the upper surface of the half axle gear is measured after the differential is assembled, and finally the pad thickness is adjusted through calculation. Since the half axle gear backlash is not directly measured, the measurement error of each size is large; and there is a gap between each part after assembly, which cannot guarantee the accuracy of the measurement value. In summary, the measurement steps are many and the calculation is complex in the prior art when selecting the pad, which makes this process a bottleneck process in the assembly process. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a differential half axle gear pad selecting device to solve the problems of many measurement steps, complex calculation and poor accuracy in the prior art when selecting the pad of the differential half axle gear.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme to realize it:

[0006] A differential half axle gear pad selecting device, comprising a differential positioning plate and a positioning assembly, the differential positioning plate is fixedly installed with a differential;

[0007] The positioning assembly comprises a core shaft, an expansion sleeve and a positioning sleeve;

[0008] The upper part of the expansion sleeve penetrates into the inside of the positioning sleeve from top to bottom, and the expansion sleeve and the positioning sleeve are in interference fit. The inner wall of the upper part of the expansion sleeve is provided with internal threads, the outer wall of the middle part of the core shaft is provided with corresponding external threads, and the core shaft penetrates into the expansion sleeve in a screw joint mode from top to bottom. The upper part of the core shaft protrudes from the top end of the positioning sleeve, and the bottom end of the core shaft is flush with the bottom end of the expansion sleeve;

[0009] The lower part of the expansion sleeve penetrates into the inside of the differential, and a magnetic partition plate is arranged between the lower wall of the positioning sleeve and the upper wall of the differential;

[0010] The lower part of the mandrel is wedge-shaped, and the inner shape of the lower part of the expansion sleeve matches the shape of the lower part of the mandrel; the expansion sleeve can be in contact with the half axle gear of the differential after expansion;

[0011] The upper part of the mandrel is connected with a dismounting hammer.

[0012] The utility model still has the following characteristics:

[0013] Further, the positioning sleeve is detachably provided with a pressing plate.

[0014] Further, the expansion sleeve and the positioning sleeve are both provided with a through positioning hole at a corresponding position.

[0015] The expansion sleeve and the positioning sleeve can be fixedly connected through the positioning hole of the sleeve and a matching positioning pin.

[0016] Further, the differential positioning plate is uniformly connected with a plurality of base feet on the side wall.

[0017] Further, the differential positioning plate is provided with a plurality of differential support plates matched with the differential in the inner ring.

[0018] Further, the dismounting hammer is provided with a dismounting handle at the top.

[0019] Further, the differential positioning plate is provided with at least two differential support plates in the inner ring.

[0020] Compared with the prior art, the utility model has the following technical effects:

[0021] The differential half axle gear pad selecting device can directly, quickly and accurately measure the clearance between differential half axle gears. The expansion sleeve is connected with the half axle gear after expansion, and drives the half axle gear to move within the side clearance. The accurate clearance value can be directly obtained by measuring the movement of the expansion sleeve with the depth ruler, and the complicated measurement and calculation are no longer needed, thereby improving the accuracy and stability of pad selecting operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Is the connection relationship between the positioning assembly and the differential in the utility model;

[0023] Figure 2 Is the principle diagram when selecting pads in the prior art;

[0024] Figure 3 Is the connection relationship between the positioning assembly and the differential in the utility model;

[0025] Figure 4 is the overall structure explosion map of the differential half axle gear pad selecting device in the utility model;

[0026] Figure 5 is the overall structure section view of the differential half axle gear pad selecting device in the utility model;

[0027] Figure 6 is the overall structure schematic view of the positioning assembly in the utility model;

[0028] Figure 7 is the overall structure section view of the positioning assembly in the utility model;

[0029] Figure 8 is the connection relation schematic view of the base support leg and the differential support plate in the utility model.

[0030] The meaning of each mark in the figure is: 1, differential positioning plate; 2, differential; 3, mandrel; 4, expansion sleeve; 5, positioning sleeve; 6, dismounting hammer; 601, dismounting handle; 7, magnetic partition plate; 8, pressing plate; 9, positioning hole; 10, base support leg; 11, differential support plate. DETAILED DESCRIPTION

[0031] It should be noted that all components in the utility model, such as no special instructions, all adopt the components known in the prior art.For example, the differential adopts the commonly used differential.

[0032] The specific embodiments of the utility model are given below, and it should be noted that the utility model is not limited to the following specific embodiments, and any equivalent transformation based on the technical solutions of the application falls within the protection scope of the utility model.

[0033] As shown in Figures 1 to 8 A differential half axle gear pad selecting device, characterized in that, comprising differential positioning plate 1 and positioning assembly, differential positioning plate 1 is fixedly installed with differential 2;

[0034] The positioning assembly comprises a mandrel 3, an expansion sleeve 4 and a positioning sleeve 5.

[0035] The upper part of the expansion sleeve 4 penetrates into the inside of the positioning sleeve 5 from top to bottom, and the expansion sleeve 4 and the positioning sleeve 5 are in interference fit.The inner wall of the upper part of the expansion sleeve 4 is provided with internal threads, and the outer wall of the middle part of the mandrel 3 is provided with corresponding external threads.The mandrel 3 is screw-connected into the expansion sleeve 4 from top to bottom.The upper part of the mandrel 3 extends out of the top end of the positioning sleeve 5, and the bottom end of the mandrel 3 is flush with the bottom end of the expansion sleeve 4.

[0036] The lower part of the expansion sleeve 4 penetrates into the inside of the differential 2, and the lower wall of the positioning sleeve 5 and the upper wall of the differential 2 are provided with a magnetic partition plate 7.

[0037] The lower part of the mandrel 3 is wedge-shaped, and the inner shape of the lower part of the expansion sleeve 4 matches the shape of the lower part of the mandrel 3; the expansion sleeve 4 can be in close contact with the half shaft gear of the differential 2 after expansion;

[0038] The upper part of the mandrel 3 is connected with a dismounting hammer 6.

[0039] As shown in the drawings, in the prior art, the sizes of the shell A part and the half shaft gear B part need to be measured before the differential 2 is assembled, the size C from the shell end face to the upper surface of the half shaft gear is measured after the differential 2 is assembled, and finally the thickness X of the adjusting pad is calculated to meet the condition of 0.2mm≤B+C-A+X≤0.3mm. Figure 2 This way also results in that the half shaft gear backlash is not directly measured, but is calculated by B+C-A, and the measurement errors of each size are accumulated to be relatively large; when the size C is measured, due to the gaps of each part after assembly, it is impossible to guarantee the accuracy of the measurement value by 100%; the measurement steps are many, and the calculation is complex, which leads to that this process becomes the bottleneck process in the assembly process.

[0040] The differential half shaft gear pad selecting device of the present application connects with the half shaft gear through the expansion sleeve 4, and drives the half shaft gear to move within the backlash range. The movement amount of the expansion sleeve 4 is measured by using a depth gauge, and the accurate backlash value can be directly obtained, so as to finally realize the purpose of improving the accuracy and stability of the pad selecting operation.

[0041] The operation of measuring the related sizes of the parts before assembly is eliminated, the half shaft gear backlash value is changed from indirect calculation to direct measurement, the accuracy and stability of the operation are improved; the thickness of the required adjusting pad can be quickly calculated by using the directly measured backlash value, the operation rhythm is improved, and the operation failure caused by complex calculation is avoided; in addition, the device structure is simple, easy to disassemble and assemble, and the manufacturing cost is low, which is beneficial to popularization.

[0042] As a preferred scheme, the positioning sleeve 5 is detachably provided with a pressing plate 8.

[0043] As a preferred scheme, the corresponding positions of the expansion sleeve 4 and the positioning sleeve 5 are provided with through positioning holes 9; the expansion sleeve 4 and the positioning sleeve 5 can be fixedly connected through the positioning holes 9 of themselves by using a matching positioning pin.

[0044] This setting can enhance the connection strength of the expansion sleeve 4 and the positioning sleeve 5.

[0045] As a preferred scheme, a plurality of base feet 10 are uniformly connected to the side walls of the differential positioning plate 1.

[0046]

[0047] ​As a preferred solution, the differential positioning plate 1 is provided with a plurality of differential support plates 11 matching the specifications of the differential 2 in the middle of the differential positioning plate 1, and the differential 2 is connected with the differential positioning plate 1 through the differential support plates 11.

[0048] As a preferred solution, the top of the dismounting hammer 6 is provided with a dismounting handle 601.

[0049] The device is used as follows: first, the differential 2 is fixed on the differential positioning plate 1; then, the magnetic partition 7, the mandrel 3, the expansion sleeve 4 and the positioning sleeve 5 are sequentially sleeved on the differential 2; the pressing plate 8 is installed, and the mandrel 3 and the dismounting hammer 6 are connected.

[0050] Secondly, the mandrel 3 is counterclockwise rotated by using a wrench to make it rise, and the expansion sleeve 4 is uniformly expanded through the wedge shape at the bottom of the mandrel 3, so as to be connected with the half shaft gear of the differential 2.

[0051] After the expansion sleeve 4 is successfully connected with the half shaft gear, the pressing plate 8 and the magnetic partition 7 are removed;

[0052] The positioning sleeve 5 is pressed downward to the bottom end, and after the gap between the half shaft gear and the surrounding parts is eliminated, the distance D1 (as shown in Figure 1 ) between the upper surface of the positioning sleeve 5 and the upper end surface of the differential housing is measured by using a depth gauge through the positioning hole 301 on the positioning sleeve 5;

[0053] The positioning sleeve 5 is lifted to the highest end, and the distance D2 (as shown in Figure 1 ) between the upper surface of the positioning sleeve 5 and the upper end surface of the differential housing is measured again by using a depth gauge through the positioning hole 301 on the positioning sleeve 5;

[0054] The half shaft gear side clearance E is calculated by D1-D2, and the thickness X of the required adjusting pad is finally calculated according to 0.2mm≤E+X≤0.3mm.

[0055] After the pad is selected, the mandrel 3 is clockwise rotated by using a wrench, so that the expansion sleeve 4 is contracted, and then the pad selecting device can be removed.

[0056] If the device is difficult to remove after the expansion sleeve 4 is contracted, the dismounting hammer 6 can be installed at the top end of the mandrel 3, and the device can be removed after being gently knocked.

Claims

1. A differential half-shaft gear shim selection device, characterized in that, It includes a differential positioning plate (1) and a positioning assembly, wherein a differential (2) is fixedly installed on the differential positioning plate (1); The positioning assembly includes a mandrel (3), an expansion sleeve (4), and a positioning sleeve (5); The upper part of the expansion sleeve (4) is inserted into the positioning sleeve (5) from top to bottom, and the expansion sleeve (4) and the positioning sleeve (5) are interference fit; the inner wall of the upper part of the expansion sleeve (4) is provided with internal thread, and the outer wall of the middle part of the mandrel (3) is provided with corresponding external thread; the mandrel (3) is screwed into the expansion sleeve (4) from top to bottom; the upper part of the mandrel (3) extends out of the top of the positioning sleeve (5), and the bottom end of the mandrel (3) is flush with the bottom end of the expansion sleeve (4); The lower part of the expansion sleeve (4) is inserted into the interior of the differential (2), and a magnetic partition (7) is provided between the lower wall of the positioning sleeve (5) and the upper wall of the differential (2). The lower part of the spindle (3) is wedge-shaped, and the internal shape of the lower part of the expansion sleeve (4) matches the shape of the lower part of the spindle (3); the expansion sleeve (4) can fit into the half-shaft gear of the differential (2) after it expands. The upper part of the mandrel (3) is connected to a disassembly hammer (6).

2. The differential half-shaft gear selection device as described in claim 1, characterized in that, The positioning sleeve (5) is detachably equipped with a pressure plate (8).

3. The differential half-shaft gear selection device as described in claim 1, characterized in that, The expansion sleeve (4) and the positioning sleeve (5) are provided with through positioning holes (9) at corresponding positions; The expansion sleeve (4) and the positioning sleeve (5) can be fixedly connected by matching positioning pins through their own positioning holes (9).

4. The differential half-shaft gear selection device as described in claim 1, characterized in that, Multiple base legs (10) are evenly connected to the side wall of the differential positioning plate (1).

5. The differential half-shaft gear selection device as described in claim 1, characterized in that, The differential positioning plate (1) has an opening in the middle. The inner ring of the differential positioning plate (1) is provided with a plurality of differential support plates (11) that match the specifications of the differential (2). The differential (2) enters the inner ring of the differential positioning plate (1) and is connected to the differential positioning plate (1) through the differential support plates (11).

6. The differential half-shaft gear selection device as described in claim 1, characterized in that, The disassembly hammer (6) is provided with a disassembly handle (601) on its top.

7. The differential half-shaft gear selection device as described in claim 5, characterized in that, The inner ring of the differential positioning plate (1) is provided with at least two differential support plates (11).

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