Detection tool for detecting coaxiality of differential half axle gear internal spline and handle excircle

Abstract

The utility model discloses a testing fixture for detecting the coaxiality of a differential half axle gear internal spline and a handle excircle, which comprises an operation table, a fixing frame and a base, the fixing frame is fixed on the rear side of the upper end face of the operation table, the base is further fixed on the operation table, and a spline shaft center is nested on the base. The spline shaft center is connected with the half axle gear body, and an air cylinder is fixed to the fixing frame. The detection tool for detecting the coaxiality of the half axle gear internal spline and the handle excircle of the differential mechanism can replace a spline comprehensive go gauge to detect the half axle gear spline while detecting the coaxiality of the half axle gear internal spline and the handle excircle, has the characteristics of quick sorting, low labor intensity and the like, saves the detection cost, and is matched with a downward pressing type rotating mechanism, so that the detection efficiency is improved. According to the device, the half axle gear can rotate after being fixed, so that the suitability of the half axle gear after being assembled can be detected, the production quality of the half axle gear is ensured, and the device is simple in overall structure, convenient to use and suitable for wide popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of inspection tool design, in particular to an inspection tool for detecting the coaxiality between an inner spline of a differential half-shaft gear and an outer circle of a handle. Background Art

[0002] Differential side gears play a vital role in automobiles. They not only transmit power, but more importantly, they can also change the direction of torque and achieve differential rotation. Their performance and condition directly affect the driving safety and comfort of the car. Therefore, the coaxiality of the shank and internal spline of the side gears in assembly with the housing and spline shaft is particularly important.

[0003] Currently, during the fine machining of some axle gears, the inner hole and the outer diameter of the shank need to be processed in two separate processes due to interference between the fixture and the tool. If the secondary clamping is not in place or the iron filings in the fixture are not cleaned cleanly, clamping errors are likely to occur, resulting in coaxiality violations between the inner hole and the outer diameter of the shank. To prevent such defective products from being transferred to customers, causing assembly difficulties and complaints, inspectors need to pass a splined mandrel through the axle gear, place it on a runout tester, and rotate it. Using a dial indicator, they can determine whether the outer diameter runout of the axle gear is out of tolerance and thus sort out defective products. This inspection method is time-consuming and labor-intensive, greatly increasing inspection costs.

[0004] To this end, in response to the above problems, a testing fixture is designed to detect the coaxiality of the internal spline of the differential half-shaft gear and the outer circle of the handle to better meet the actual use needs. Utility Model Content

[0005] The purpose of the utility model is to provide a testing tool for detecting the coaxiality between the internal spline of the differential half-shaft gear and the outer circle of the handle, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present utility model provides the following technical solution: a checking fixture for detecting the coaxiality between the internal spline of the differential half-shaft gear and the outer circle of the handle, comprising an operating table, a fixing frame and a base, wherein the fixing frame is fixed to the rear side of the upper end face of the operating table, and the operating table is also fixed to the base, a spline shaft is nested and installed on the base, the spline shaft is connected to the half-shaft gear body, and a cylinder is fixed on the fixing frame.

[0007] Preferably, balls are installed at equal angles on the base, and the balls can roll in contact with the side gear body. The contact and rolling action between the balls and the side gear body can provide basic protection for the rotation of the side gear body.

[0008] Preferably, the maximum diameter of the groove on the base is the sum of the outer diameter of the handle of the half-axle gear body and the outer circle runout value, and the minimum diameter of the groove on the base is matched with the bottom diameter of the spline shaft. By limiting the diameter of the groove on the base, a basic guarantee can be provided for the coaxial detection of the half-axle gear body.

[0009] Preferably, a fixing plate is fixed to the output end of the cylinder, and a connecting rod is fixed to the fixing plate. Through the above structure, a basic guarantee can be provided for the subsequent rotation of the half-shaft gear body.

[0010] Preferably, a movable plate is provided under the fixed plate, and a sliding rod is fixed on the movable plate, and the sliding rod and the fixed plate are slidably connected. When the movable plate moves relative to the fixed plate, the sliding guiding action between the sliding rod and the fixed plate can ensure the stability of the movement of the movable plate.

[0011] Preferably, one end of a spring is fixed to the movable plate, and the other end of the spring is fixed to the fixed plate. The elastic action of the spring can provide a basic force for the automatic reset of the movable plate when the movable plate is not acted upon by an external force.

[0012] Preferably, the lower end bearing of the movable plate is connected to a circular shaft, and a spiral groove is provided on the circular shaft, and the spiral groove and the connecting rod are slidably connected. Through the above structure, a basic guarantee can be provided for the rotation of the movable plate and the fixed plate.

[0013] Preferably, a horizontal plate is fixed to the lower end face of the circular shaft, and a limiting rod is fixed to the lower end face of the horizontal plate symmetrically on the left and right, and the limiting rod contacts the half-shaft gear body to achieve positioning. Through the action of the horizontal plate and the limiting rod, a basic guarantee can be provided for the clamping and limiting of the half-shaft gear body.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the inspection tool for detecting the coaxiality of the internal splines of the differential half-shaft gear and the outer circle of the shank can replace the spline comprehensive gauge to detect the splines of the half-shaft gear while detecting the coaxiality of the internal splines of the half-shaft gear and the outer circle of the shank, and has the characteristics of rapid sorting and low labor intensity, saving inspection costs. In combination with the downward pressure rotation mechanism, the half-shaft gear can be rotated after being fixed, so that the adaptability of the half-shaft gear after assembly can be detected, thereby ensuring the production quality of the half-shaft gear. The overall structure of the device is simple, easy to use, and suitable for wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device of the utility model;

[0016] Figure 2 This is a schematic diagram of a half-cut three-dimensional structure of the base and the half-shaft gear of the utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure composed of the fixed plate and the movable plate of the utility model.

[0018] In the figure: 1. operating table; 2. fixing frame; 3. base; 301. ball bearing; 4. spline shaft; 5. half-shaft gear body; 6. cylinder; 7. fixing plate; 701. connecting rod; 8. movable plate; 801. sliding rod; 802. spring; 803. circular shaft; 804. spiral slide; 9. horizontal plate; 901. limit rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 3 The utility model provides a technical solution: a checking fixture for detecting the coaxiality of the internal spline of the differential half-shaft gear and the outer circle of the handle, comprising an operating table 1, a fixing frame 2 and a base 3. The fixing frame 2 is fixed to the rear side of the upper end surface of the operating table 1, and the base 3 is also fixed on the operating table 1. A spline shaft 4 is nested and installed on the base 3. The spline shaft 4 is connected to the half-shaft gear body 5, and a cylinder 6 is fixed on the fixing frame 2.

[0021] Balls 301 are mounted at equal angles on the base 3, and the balls 301 are in contact with the side gear body 5 for rolling. The maximum diameter of the groove on the base 3 is the sum of the outer diameter of the shank of the side gear body 5 and the outer circle runout value, and the minimum diameter of the groove on the base 3 matches the bottom diameter of the spline shaft 4.

[0022] When using the inspection tool for detecting the coaxiality between the internal spline of the differential half-shaft gear and the outer circle of the handle, Figure 1-Figure 3 As shown, insert the spline shaft center 4 into the base 3 to realize the positioning of the spline shaft center 4, then turn the shaft end of the side gear body 5 downward, pass the internal spline of the side gear body 5 through the spline shaft center 4, and place it downward. If the side gear body 5 can pass through the spline shaft center 4, and the outer circle of the shank of the side gear body 5 is completely placed in the groove on the base 3, and the end face of the side gear body 5 is completely in contact with the ball 301 on the base 3, then the coaxiality of the outer circle of the shank of the side gear body 5 and the internal spline is qualified and can be circulated normally. If the shank of the side gear body 5 cannot be placed in the groove of the base 3 or is stuck in the groove of the base 3, then the coaxiality of the outer circle of the shank of the side gear body 5 and the internal spline is out of tolerance and needs to be isolated and scrapped. Whether the internal spline of the side gear body 5 can pass through the spline shaft center 4 can be judged whether the spline meets the lower limit requirement, and then the spline stop gauge can be used to complete the sorting of the internal spline of the spline shaft center 4;

[0023] The output end of the cylinder 6 is fixed with a fixed plate 7, and a connecting rod 701 is fixed on the fixed plate 7; a movable plate 8 is provided below the fixed plate 7, and a sliding rod 801 is fixed on the movable plate 8, and the sliding rod 801 and the fixed plate 7 are in sliding connection; one end of a spring 802 is also fixed to the movable plate 8, and the other end of the spring 802 is fixed to the fixed plate 7; the lower end surface of the movable plate 8 is connected to a circular shaft 803 by a bearing, and a spiral groove 804 is provided on the circular shaft 803, and the spiral groove 804 and the connecting rod 701 are in sliding connection; the lower end surface of the circular shaft 803 is fixed with a horizontal plate 9, and the lower end surface of the horizontal plate 9 is symmetrically fixed with a limit rod 901, and the limit rod 901 is in contact with the half-shaft gear body 5 to achieve positioning;

[0024] During the inspection of the side gear body 5, if Figure 1-Figure 3 As shown, when the half-shaft gear body 5 is assembled with the spline shaft 4 and the base 3, the fixed plate 7, the movable plate 8 and the cross plate 9 are driven downward by controlling the cylinder 6. When the limiting rod 901 contacts the half-shaft gear body 5, the position of the half-shaft gear body 5 can be limited. At this time, the cylinder 6 continues to drive the fixed plate 7 to move relative to the movable plate 8, and the sliding guide effect between the sliding rod 801 and the fixed plate 7 can ensure the stability of the movement of the fixed plate 7. When the fixed plate 7 moves, the connecting rod 701 is synchronously driven to move, and the connecting rod 701 and the spiral slide are combined to form a fixed plate 7. The sliding action between the grooves 804 can rotate the circular shaft 803 and the cross plate 9, thereby driving the side gear body 5 to rotate. Combined with the rolling action of the ball 301, the stability of the rotation of the side gear body 5 can be ensured. When the side gear body 5 can rotate smoothly, the side gear body 5 is a qualified product. When the rotation of the side gear body 5 is blocked, the side gear body 5 is a failed product, thereby realizing the rapid detection and sorting of the side gear body 5. This is the working principle of the inspection fixture for detecting the coaxiality of the internal spline of the differential side gear and the outer circle of the shank.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test fixture for detecting the coaxiality between the internal spline of a differential half-shaft gear and the outer circle of a shank, comprising an operating table (1), a fixing frame (2) and a base (3), wherein the fixing frame (2) is fixed to the rear side of the upper end surface of the operating table (1), and the base (3) is also fixed to the operating table (1), characterized in that: A spline shaft (4) is nested and installed on the base (3), the spline shaft (4) and the half-axle gear body (5) are connected to each other, and a cylinder (6) is fixed on the fixing frame (2).

2. A testing fixture for detecting the coaxiality between the internal spline of a differential axle gear and the outer circle of the handle according to claim 1, characterized in that: Balls (301) are mounted on the base (3) at equal angles, and the balls (301) are in contact with the half-axle gear body (5) and can roll.

3. A testing fixture for detecting the coaxiality between the internal spline and the outer circle of the handle of a differential side gear according to claim 1, characterized in that: The maximum diameter of the groove on the base (3) is the sum of the outer diameter of the shank of the half-axle gear body (5) and the outer circle runout value, and the minimum diameter of the groove on the base (3) matches the bottom diameter of the spline shaft (4).

4. A testing fixture for testing the coaxiality between the internal spline of a differential axle gear and the outer circle of the handle according to claim 1, characterized in that: A fixing plate (7) is fixed to the output end of the cylinder (6), and a connecting rod (701) is fixed to the fixing plate (7).

5. A testing tool for testing the coaxiality between the internal spline of a differential side gear and the outer circle of the handle according to claim 4, characterized in that: A movable plate (8) is provided below the fixed plate (7), a sliding rod (801) is fixed on the movable plate (8), and the sliding rod (801) and the fixed plate (7) are in sliding connection.

6. A testing tool for testing the coaxiality between the internal spline and the outer circle of the handle of a differential side gear according to claim 5, characterized in that: One end of a spring (802) is also fixed on the movable plate (8), and the other end of the spring (802) is fixed on the fixed plate (7).

7. A testing fixture for testing the coaxiality between the internal spline of a differential axle gear and the outer circle of the handle according to claim 5, characterized in that: The lower end surface bearing of the movable plate (8) is connected to a circular shaft (803), and a spiral chute (804) is provided on the circular shaft (803), and the spiral chute (804) is slidably connected to the connecting rod (701).

8. A testing fixture for testing the coaxiality between the internal spline of a differential side gear and the outer circle of the handle according to claim 7, characterized in that: A transverse plate (9) is fixed to the lower end surface of the circular shaft (803), and a limiting rod (901) is fixed to the lower end surface of the transverse plate (9) symmetrically on the left and right, and the limiting rod (901) contacts the half-shaft gear body (5) to achieve positioning.

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