A differential case outer circle run-out detection device

Abstract

The utility model belongs to differential mechanism detection technical field especially, it is a kind of differential mechanism shell outer circle runout detection device, including operation platform, dial gauge and clamping assembly, clamping assembly includes carousel and the positioning cylinder being arranged on carousel, carousel rotatable setting is in operation platform, and the bottom end inner wall of positioning cylinder is provided with limit block;Differential mechanism shell both ends are provided with hollow shaft, and the end of hollow shaft is uniformly provided with two lugs, and the limit slot is formed between two adjacent lugs, and the hollow shaft of differential mechanism shell is closely arranged with the inner wall of positioning cylinder, and the limit block is matched and arranged in limit slot;Dial gauge is installed on operation platform, and the dial needle of dial gauge can be pressed to the outer circle measuring surface of differential mechanism shell. The device can be conveniently and quickly realized the accurate installation of differential mechanism shell, guarantee the precision of measurement, compared with the traditional V-shaped clamping seat installation differential mechanism shell mode, will not cause differential mechanism's clamping and measurement damage.

Description

Technical Field

[0001] This utility model belongs to the field of differential testing technology, and in particular relates to a device for detecting the runout of the outer circle of a differential housing. Background Technology

[0002] The differential is an important component of a car. Its function is to make the wheels on both sides rotate at different speeds. The differential consists of parts such as the differential housing, planetary gears, and planetary gear shafts. The differential housing is used to enclose the entire differential, and its outer contour needs to meet certain specifications, which is generally tested by measuring the runout value.

[0003] Patent publication number "CN205808290U" discloses a comprehensive detection device for differential housing dimensions, including: a bracket supporting and positioning the differential housing to be tested, and the differential housing to be tested being able to rotate on the V-shaped bracket. Similar to the aforementioned prior art, conventional devices for detecting the runout of the outer surface of a differential housing typically involve setting two V-shaped clamps on an operating table, placing the differential housing to be tested on the two V-shaped clamps, then having the measuring rod of a dial indicator contact the outer circumferential surface of the differential housing while simultaneously rotating the differential housing. The runout of the outer circumferential surface of the differential housing is then detected by observing the changes in the dial indicator pointer.

[0004] However, the above-mentioned device has a problem in use: the differential housing is not completely fixed when using a V-shaped clamp, resulting in installation errors. Furthermore, when rotating the differential housing, the shafts at both ends of the differential directly rub against the inner wall of the V-shaped clamp. After measuring multiple differential housings, the V-shaped clamp will inevitably experience measurement wear, leading to errors in subsequent measurements and affecting the accuracy of the measurement. Utility Model Content

[0005] In view of the technical problems existing in the background art, this utility model provides a differential housing outer circle runout detection device.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A differential housing outer diameter runout detection device includes an operating table, a dial indicator, and a clamping assembly for mounting the differential housing to be tested. The clamping assembly includes a turntable and a positioning cylinder mounted on the turntable. The turntable is rotatably mounted on the operating table. A limit block is provided on the inner wall of the bottom end of the positioning cylinder. Hollow shafts are respectively provided at both ends of the differential housing. Two protrusions are evenly distributed at the ends of the hollow shafts, and a limiting groove is formed between two adjacent protrusions. The hollow shafts of the differential housing are closely attached to the inner wall of the positioning cylinder, and the limit blocks are fitted into the limiting grooves. The dial indicator is mounted on the operating table, and the needle of the dial indicator can press against the outer diameter measuring surface of the differential housing.

[0008] Optionally, a flange is provided on the outside of the differential housing, which can drive the differential housing and the turntable to rotate synchronously by rotating the flange.

[0009] Optionally, the operating platform is provided with an elastically extendable limiting component, which includes a locking block. The locking block is triangular in shape and has a guide slope and a vertical positioning surface. The turntable is provided with a push plate. When the turntable rotates and causes the push plate to abut against the vertical positioning surface, the turntable is limited and fixed. When the turntable rotates and causes the push plate to abut against the guide slope, the locking block descends to achieve continuous rotation of the turntable.

[0010] Optionally, the operating platform is provided with a sliding groove, and the limiting component further includes a slider. The slider is vertically mounted in the sliding groove, and a spring is provided at the bottom end of the slider. The bottom end of the spring is fixed to the bottom wall of the sliding groove. A vertical plate is provided at the upper end of the slider, and a locking block is provided on one side of the vertical plate. An L-shaped clearance groove is provided on the operating platform, and the locking block and the vertical plate are slidably mounted in the limiting groove.

[0011] Optionally, the card block is configured to be arc-shaped.

[0012] Optionally, the upper end of the limiting block is provided with a limiting post, the side of the limiting post is flush with the side of the limiting block, and the two sides of the limiting post are symmetrically provided with arc-shaped limiting surfaces, which are closely attached to the inner wall of the hollow shaft.

[0013] Optionally, the operating table is provided with a mounting base, and a first mounting rod is rotatably provided inside the mounting base. A second mounting rod is rotatably provided at the upper end of the first mounting rod, and the dial indicator is detachably mounted at the end of the second mounting rod.

[0014] Optionally, a bearing is installed on the inner wall of the operating table, and the outer wall of the bearing is set in close contact with the inner wall of the turntable.

[0015] This utility model has the following advantages and beneficial effects:

[0016] In this invention, a turntable and a positioning cylinder are used. The hollow shafts at both ends of the differential housing are used for positioning and installation. Through the limiting grooves at the ends of the hollow shafts and the limiting block structure inside the positioning cylinder, a convex-concave fit is used to connect the hollow shafts and the positioning cylinder into a single unit for synchronous rotation. This method allows for convenient and quick precise installation of the differential housing, ensuring measurement accuracy. Compared to the traditional V-shaped clamp mounting method for the differential housing, this method avoids damage during clamping and measurement, thus guaranteeing measurement accuracy. Attached Figure Description

[0017] Figure 1This is one of the structural diagrams of the differential housing outer circle runout detection device of this utility model;

[0018] Figure 2 for Figure 1 A magnified view of a portion of point a;

[0019] Figure 3 This is the second structural diagram of the differential housing outer circle runout detection device of this utility model;

[0020] Figure 4 This is the third structural diagram of the differential housing outer circle runout detection device of this utility model;

[0021] Figure 5 This is a front view of the differential housing outer circle runout detection device of this utility model;

[0022] Figure 6 for Figure 5 A cross-sectional view along the AA direction;

[0023] Figure 7 This is a structural diagram of the turntable, positioning cylinder, and limiting post of this utility model;

[0024] Figure 8 for Figure 7 Top view;

[0025] Figure 9 for Figure 8 A cross-sectional view along the BB direction;

[0026] Figure 10 This is a structural diagram of the slider and the locking block in this utility model;

[0027] Figure 11 for Figure 10 Front view;

[0028] Figure 12 This is one of the structural diagrams of the differential housing in this utility model;

[0029] Figure 13 This is the second structural diagram of the differential housing in this utility model.

[0030] Reference numerals: 1-Operating table, 11-Slide groove, 12-Allowing groove, 2-Slider, 21-Vertical plate, 22-Clamping block, 23-Vertical positioning surface, 24-Guide inclined surface, 25-Spring, 3-Turntable, 31-Positioning cylinder, 32-Push plate, 33-Limiting block, 34-Limiting post, 35-Limiting surface, 4-Differential housing, 41-Flange, 42-Hollow shaft, 43-Protrusion, 44-Limiting groove, 45-Outer circle measuring surface, 5-Dial indicator, 51-Indicator needle, 6-Mounting base, 61-First mounting rod, 62-Second mounting rod, 7-Bearing. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] Example

[0034] like Figures 1 to 11 As shown, a differential housing outer circle runout detection device includes an operating table 1, a dial indicator 5, and a clamping assembly for clamping the differential housing 4 to be tested.

[0035] like Figure 12 and Figure 13 As shown, the differential housing 4 has a ring-shaped structure. A flange 41 is provided on the outer side of the differential housing 4. Hollow shafts 42 are provided at both ends of the differential housing 4. Two protrusions 43 are provided at the ends of the hollow shafts 42, and a limiting groove 44 is formed between the two protrusions 43. The above structure is the inherent structure of the differential housing 4 itself. The clamping component designed in this utility model is used to accommodate the clamping of the differential housing 4.

[0036] like Figures 1 to 11 As shown, the clamping assembly includes a turntable 3 and a positioning cylinder 31 mounted on the turntable 3. The turntable 3 is rotatably mounted on the operating table 1. A limit block 33 is provided on the inner wall of the bottom end of the positioning cylinder 31. Hollow shafts 42 are respectively provided at both ends of the differential housing 4. Two protrusions 43 are evenly distributed at the ends of the hollow shafts 42. A limiting groove 44 is formed between two adjacent protrusions 43. The hollow shafts 42 of the differential housing 4 are closely attached to the inner wall of the positioning cylinder 31, and the limit blocks 33 are fitted in the limiting groove 44 to realize the connection between the positioning cylinder 31 and the hollow shafts 42. A dial indicator 5 is mounted on the operating table 1. The needle 51 of the dial indicator 5 can press against the outer measuring surface 45 of the differential housing 4.

[0037] In this invention, a turntable 3 and a positioning cylinder 31 are used. The hollow shafts 42 at both ends of the differential housing 4 are used for positioning and installation. Through the limiting grooves 44 at the ends of the hollow shafts 42 and the limiting blocks 33 inside the positioning cylinder 31, a convex-concave fit is used to connect the hollow shafts 42 and the positioning cylinder 31 into a single unit for synchronous rotation. This method allows for convenient and quick precise installation of the differential housing 4, ensuring measurement accuracy. Compared to the traditional V-shaped clamp mounting method for the differential housing 4, this method avoids damage to the differential during clamping and measurement, thus guaranteeing measurement accuracy.

[0038] Furthermore, a flange 41 is provided on the outer side of the differential housing 4, which can drive the differential housing 4 and the turntable 3 to rotate synchronously by rotating the flange 41. Therefore, during measurement, only the flange 41 needs to be rotated, and there is no need to rotate the turntable 3, making the operation simpler and more convenient.

[0039] like Figures 1 to 11 As shown, in this utility model, the operating table 1 is equipped with an elastically extendable limiting component, which includes a locking block 22. The locking block 22 is triangular in shape and has a guide slope 24 and a vertical positioning surface 23. The turntable 3 is equipped with a push plate 32. When the turntable 3 rotates and drives the push plate 32 to abut against the vertical positioning surface 23, the turntable 3 achieves limiting and fixing. Figure 2 As shown, at this time, the push plate 32 on the outer wall of the turntable 3 is in close contact with the vertical positioning surface 23, and the turntable 3 cannot rotate clockwise, thus achieving the positioning of the turntable 3; when the turntable 3 rotates, causing the push plate 32 to abut against the guide slope 24, the linkage block 22 descends, achieving continuous rotation of the turntable 3. Figure 2 As shown, at this time, the push plate 32 on the outer wall of the turntable 3 is in close contact with the vertical positioning surface 23, and the turntable 3 can rotate counterclockwise until it reaches the other side and abuts against the guide slope 24, thereby compressing the locking block 22 and causing it to descend without affecting the normal rotation of the turntable 3. In other words, this kind of limiting component can enable the turntable 3 to rotate continuously in one direction, but the rotation in the other direction is restricted, and it can only rotate in one direction.

[0040] The purpose of this design is to facilitate the engagement of the limiting groove 44 of the hollow shaft 42 with the limiting block 33. The specific operating steps are as follows: Figure 2As shown, first, rotate the turntable 3 clockwise so that the push plate 32 is tightly against the vertical positioning surface 23, thus limiting and fixing the turntable 3. Then, install the differential housing 4 and install the hollow shaft 42 on the inner wall of the positioning cylinder 31. Then, slowly rotate the flange 41 clockwise, driving the hollow shaft 42 to rotate. At this time, the hollow shaft 42 rotates clockwise, and the turntable 3 is fixed until the limiting groove 44 rotates to be directly opposite and engaged with the limiting block 33. After the hollow shaft 42 and the positioning cylinder 31 are connected as one unit, adjust the position of the dial indicator 5 so that its needle 51 is tightly against the outer circle measuring surface 45 of the differential housing 4. Then, rotate the flange 41 counterclockwise, synchronously driving the differential housing 4 and the turntable 3 to rotate counterclockwise. The limiting component will no longer block the push plate 32 and can rotate continuously, realizing the detection of the runout of the outer circle measuring surface 45.

[0041] like Figures 1 to 11 As shown, the operating table 1 further includes a sliding groove 11, and the limiting assembly also includes a slider 2. The slider 2 is vertically movable within the sliding groove 11, and a spring 25 is installed at the bottom of the slider 2, with the bottom of the spring 25 fixed to the bottom wall of the sliding groove 11. A vertical plate 21 is installed at the upper end of the slider 2, and a locking block 22 is bent on one side of the vertical plate 21. The operating table 1 has an L-shaped clearance groove 12, and the locking block 22 and the vertical plate 21 are slidably disposed in the limiting groove 44. When the push plate 32 moves and abuts against the guide inclined surface 24, the locking block 22 descends, allowing it to descend within the clearance groove 12. Simultaneously, the slider 2 descends, compressing the spring 25. When the push plate 32 leaves the locking block 22, the spring 25 returns to its original position, driving the locking block 22 to reset. This structure is simple and effective.

[0042] Furthermore, the locking block 22 is set to an arc shape, that is, in the top view, the locking block 22 is arc-shaped. Because the turntable 3 rotates, the rotation of the push plate 32 is a circular path. Therefore, setting the locking block 22 to an arc shape ensures that the push plate 32 can be completely in contact with the locking block 22 to achieve linkage during the rotation process.

[0043] Furthermore, a limiting post 34 is provided at the upper end of the limiting block 33. The side of the limiting post 34 is flush with the side of the limiting block 33. Arc-shaped limiting surfaces 35 are symmetrically provided on both sides of the limiting post 34, and the limiting surfaces 35 are set in close contact with the inner wall of the hollow shaft 42. Through the design of the limiting post 34, the hollow shaft 42 at the upper and lower ends of the entire differential housing 4 is clamped and limited, further increasing the stability and accuracy of the clamping.

[0044] Furthermore, a mounting base 6 is provided on the operating table 1. A first mounting rod 61 is rotatably mounted inside the mounting base 6, and a second mounting rod 62 is rotatably mounted on the upper end of the first mounting rod 61. The dial indicator 5 is detachably mounted on the end of the second mounting rod 62. By rotating the first mounting rod 61 in the horizontal plane, the dial indicator 5 is adjusted to approach the differential housing 4. By rotating the second mounting rod 62 in the vertical plane, the dial indicator 5 is adjusted to reach the outer circular measuring surface 45. Through rotational adjustments in multiple directions, the position of the dial indicator 5 is ultimately adjusted.

[0045] Furthermore, a bearing 7 is installed on the inner wall of the operating table 1, and the outer wall of the bearing 7 is set in close contact with the inner wall of the turntable 3 to realize the rotation installation of the turntable 3.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A differential housing outer circle runout detection device, characterized in that: This includes an operating panel, a dial indicator, and a clamping assembly for mounting the differential housing to be tested. The clamping assembly includes a turntable and a positioning cylinder mounted on the turntable. The turntable is rotatably mounted on the operating table. A limit block is provided on the inner wall of the bottom end of the positioning cylinder. Hollow shafts are respectively provided at both ends of the differential housing. Two protrusions are evenly distributed at the ends of the hollow shafts, and a limiting groove is formed between two adjacent protrusions. The hollow shafts of the differential housing are closely attached to the inner wall of the positioning cylinder, and the limit blocks are fitted in the limiting grooves. A dial indicator is mounted on the operating table, and the needle of the dial indicator can press against the outer measuring surface of the differential housing.

2. The differential housing outer circle runout detection device according to claim 1, characterized in that: A flange is provided on the outside of the differential housing, which can drive the differential housing and the turntable to rotate synchronously by rotating the flange.

3. The differential housing outer circle runout detection device according to claim 1, characterized in that: The operating platform is equipped with a retractable limiting component, which includes a locking block. The locking block is triangular in shape and has a guide slope and a vertical positioning surface. The turntable is equipped with a push plate. When the turntable rotates and the push plate abuts against the vertical positioning surface, the turntable is limited and fixed. When the turntable rotates and the push plate abuts against the guide slope, the locking block descends to achieve continuous rotation of the turntable.

4. The differential housing outer circle runout detection device according to claim 3, characterized in that: The operating platform is provided with a sliding groove, and the limiting component also includes a slider. The slider is provided in the sliding groove and can be raised and lowered. A spring is provided at the bottom end of the slider and the bottom end of the spring is fixed to the bottom wall of the sliding groove. A vertical plate is provided at the upper end of the slider. A locking block is provided on one side of the vertical plate. An L-shaped clearance groove is provided on the operating platform. The locking block and the vertical plate are slidably arranged in the limiting groove.

5. The differential housing outer circle runout detection device according to claim 3, characterized in that: The card block is set to an arc shape.

6. The differential housing outer circle runout detection device according to claim 1, characterized in that: The upper end of the limiting block is provided with a limiting post, the side of the limiting post is flush with the side of the limiting block, and the two sides of the limiting post are symmetrically provided with arc-shaped limiting surfaces, which are closely attached to the inner wall of the hollow shaft.

7. The differential housing outer circle runout detection device according to claim 1, characterized in that: The operating table is provided with a mounting base, and a first mounting rod is rotatably provided inside the mounting base. A second mounting rod is rotatably provided at the upper end of the first mounting rod, and the dial indicator is detachably mounted at the end of the second mounting rod.

8. The differential housing outer circle runout detection device according to claim 1, characterized in that: The inner wall of the operating table is equipped with a bearing, and the outer wall of the bearing is set in close contact with the inner wall of the turntable.

Images