Expansion core type gap measuring device

Abstract

The utility model discloses an expansion core type gap measuring device which comprises a positioning mechanism, an expansion sleeve mechanism and an adjusting mechanism. The positioning mechanism comprises a cylinder body matched with the outer circle of one end of the differential mechanism assembly. The expanding sleeve mechanism comprises a base, and a plurality of measuring wings for expanding are arranged on the base; the adjusting mechanism comprises an adjusting screw rod, one end of the adjusting screw rod is movably connected with a limiting plate in a sleeved mode, and one side of the limiting plate is provided with a first expanding shaft and a second expanding shaft which are connected to the adjusting screw rod in a sleeved mode. According to the utility model, the positioning mechanism is used for installation, and the adjusting mechanism is used for expanding the expanding sleeve mechanism, so that the measuring wing can be expanded conveniently, the axial clearance of the half axle gear can be detected, and the adjusting mechanism and the expanding measuring wing can be inserted into a differential assembly from the two ends respectively due to small volume. And the first expansion shaft and the second expansion shaft are limited through the limiting plate, so that the stability of the test is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, and particularly relates to a core-expanding type clearance measuring device. Background Technique

[0002] An automotive differential is a mechanism that enables the left and right (or front and rear) drive wheels to rotate at different speeds. It mainly consists of left and right axle gears, two planetary gears and a gear carrier. Its function is to enable the left and right wheels to roll at different speeds when the vehicle is turning or driving on an uneven road surface, that is, to ensure that the two drive wheels make pure rolling motions. The differential is installed to adjust the speed difference between the left and right wheels. When four-wheel drive is used, in order to drive four wheels, all the wheels must be connected. If the four wheels are mechanically connected together, the vehicle cannot rotate at the same speed when driving in a curve. In order to make the rotation speed of the vehicle in a curve basically consistent, an intermediate differential is needed at this time to adjust the speed difference between the front and rear wheels.

[0003] The inside of the differential assembly is a closed spherical structure. Four planetary gears sleeved on the cross shaft in the middle are in close mesh with the axle gears on both sides. The axial clearances of the axle gears on both sides are required to be 0.3 - 0.5 mm respectively. After the differential assembly is assembled, the space inside is narrow, and the axial clearance of the internal axle gears cannot be measured.

[0004] However, the existing devices still have some disadvantages. For example, first, after the differential assembly is assembled, the space inside is narrow, and the axial clearance of the internal axle gears cannot be measured; second, the structure cannot be fixed, which easily causes the mechanism to loosen and affects the measurement result. Content of the Utility Model

[0005] Aiming at the problems mentioned in the background technique, the purpose of the utility model is to provide a core-expanding type clearance measuring device to solve the problems mentioned in the background technique.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] A core-expanding type clearance measuring device includes a positioning mechanism, a core-expanding sleeve mechanism and an adjusting mechanism; the positioning mechanism includes a cylinder body that fits with the outer circle of one end of the differential assembly;

[0008] The core-expanding sleeve mechanism includes a base, and a plurality of measuring wings for core-expanding are arranged on the base;

[0009] The adjusting mechanism includes an adjusting screw and a spring. One end of the adjusting screw is movably sleeved with a limiting plate, and a first core-expanding shaft and a second core-expanding shaft sleeved on the adjusting screw are arranged on one side of the limiting plate.

[0010] By adopting the above technical solutions, when the utility model is in use, it is installed through the positioning mechanism to maintain the connection with the differential assembly, facilitating the detection of the differential assembly. Moreover, the adjusting mechanism performs an expanding operation on the expanding sleeve mechanism, enabling the measuring fins to expand, completing the detection of the axial clearance of the axle gears. And because the adjusting mechanism and the expanding measuring fins are small in volume, they can be inserted into the differential assembly from both ends respectively. When the measuring fins expand, the contact mode with the axle gears is the expanding contact of a complete cylindrical surface, increasing the contact area and friction force, making the measuring device closely combined with the axle gears. And the first expanding shaft and the second expanding shaft are limited by the limiting plate to maintain the stability of the measurement, solving the requirement of quickly and accurately measuring the axial clearance of the two axle gears on both sides inside the differential assembly, enabling the quick selection of the specifications of the axle gear gaskets, improving the assembly efficiency and assembly accuracy, and preventing faults such as loud noise and gear meshing burnout caused by unqualified axial clearance.

[0011] Preferably, a fastening bolt is threadedly connected to the bottom end of the adjusting screw, and an anti - detachment plate is provided on one side of the fastening bolt.

[0012] By adopting the above technical solutions, the anti - detachment plate provided on one side of the fastening bolt can limit and prevent the first expanding shaft and the second expanding shaft from detaching, maintaining the installation stability of the first expanding shaft and the second expanding shaft.

[0013] Preferably, the outer diameter of the anti - detachment plate is larger than the diameter of the fastening bolt and smaller than the bottom outer diameter of the second expanding shaft.

[0014] By adopting the above technical solutions, the diameter of the anti - detachment plate is between the inner diameter and the outer diameter of the second expanding shaft, facilitating the anti - detachment installation of the second expanding shaft.

[0015] Preferably, one end of the spring is fixedly connected to the inner side of the base, and the other end of the spring is fixedly connected to the limiting plate.

[0016] By adopting the above technical solutions, the spring is fixed on the base to maintain the installability, and the other end is connected to the limiting plate, facilitating the pushing of the limiting plate to limit the first expanding shaft and the second expanding shaft.

[0017] Preferably, a through - threaded hole is opened on the base, the adjusting screw is threadedly connected in the through - threaded hole, and a rotating hand - ring is welded to one end of the adjusting screw.

[0018] By adopting the above technical solutions, the through - threaded hole facilitates the threaded installation of the adjusting screw, and the position of the adjusting screw is adjusted by rotating the rotating hand - ring.

[0019] Preferably, threaded grooves are formed on both sides of the base, and the cylinder body is fixedly connected to the base through fixing bolts and the threaded grooves.

[0020] By adopting the above technical solution, the setting of the threaded grooves and the fixing bolts facilitates the connection and installation of the positioning mechanism and the expanding sleeve mechanism, maintaining integrity.

[0021] Preferably, an extension part is fixedly arranged on the outer side of the bottom of the cylinder body.

[0022] By adopting the above technical solution, the setting of the extension part facilitates the placement and taking of the equipment, and after measurement, it is convenient to remove the equipment.

[0023] Preferably, the inner side of the bottom end of the measuring fin is set to be arc-shaped, and the second expanding shaft is set to be a cone with a smaller diameter at the upper end and a larger diameter at the lower end.

[0024] By adopting the above technical solution, the inner side of the measuring fin is set to be arc-shaped, and the second expanding shaft is set to be a cone, which facilitates the displacement of the adjusting screw, realizes the expansion of the measuring fin, and realizes the measurement.

[0025] In summary, the present utility model mainly has the following beneficial effects:

[0026] When the present utility model is in use, it is installed through the positioning mechanism to maintain the connection with the differential assembly, facilitating the detection of the differential assembly. And the adjusting mechanism performs an expanding operation on the expanding sleeve mechanism, facilitating the opening of the measuring fins, completing the detection of the axial clearance of the side gear. And because the adjusting mechanism and the expanding and measuring fins are small in volume, they can be inserted into the differential assembly from both ends respectively. When the measuring fins are opened, the contact mode with the side gear is the expansion contact of a complete cylindrical surface, increasing the contact area and friction force, making the measuring device closely combined with the side gear. And the first expanding shaft and the second expanding shaft are limited by the limiting plate to maintain the stability of the measurement, solving the requirement of quickly and accurately measuring the axial clearance of the two side gears inside the differential assembly, quickly selecting the specification of the side gear gasket, improving the assembly efficiency and assembly accuracy, and preventing faults such as large noise and gear meshing burnout caused by unqualified axial clearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a structural schematic diagram of the present utility model;

[0028] Figure 2 is a partial structural schematic diagram of the present utility model;

[0029] Figure 3 is a schematic diagram of the adjusting mechanism of the present utility model;

[0030] Figure 4It is a schematic diagram of the expansion sleeve mechanism of the present utility model.

[0031] Reference numerals: 1, positioning mechanism; 101, cylinder body; 102, extension part; 103, fixing bolt; 2, expansion sleeve mechanism; 201, base; 202, measuring fin; 203, thread groove; 204, through threaded hole; 3, adjusting mechanism; 301, adjusting screw; 302, limiting plate; 303, spring; 304, first expansion shaft; 305, second expansion shaft; 306, anti - detachment plate; 307, fastening bolt; 308, rotating hand ring. Specific implementation mode

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0033] Refer to Figures 1-4 , a core - expanding type clearance measuring device, comprising a positioning mechanism 1, an expansion sleeve mechanism 2 and an adjusting mechanism 3; the positioning mechanism 1 includes a cylinder body 101 that fits with the outer circle of one end of the differential assembly.

[0034] The expansion sleeve mechanism 2 includes a base 201, and a plurality of measuring fins 202 for expansion are provided on the base 201.

[0035] The adjusting mechanism 3 includes an adjusting screw 301 and a spring 303. One end of the adjusting screw 301 is movably sleeved with a limiting plate 302, and a first expansion shaft 304 and a second expansion shaft 305 sleeved on the adjusting screw 301 are provided on one side of the limiting plate 302.

[0036] When the utility model is in use, it is installed through the positioning mechanism 1 to maintain the connection with the differential assembly, facilitating the detection of the differential assembly. Moreover, the adjusting mechanism 3 performs an expanding operation on the expanding sleeve mechanism 2, enabling the measuring fin 202 to expand, thereby completing the detection of the axial clearance of the axle gear. Since the adjusting mechanism 3 and the expanding measuring fin 202 are small in volume, they can be inserted into the differential assembly from both ends respectively. When the measuring fin 202 expands, its contact mode with the axle gear is a complete cylindrical surface expanding contact, increasing the contact area and friction force, making the measuring device closely combined with the axle gear. And the first expanding shaft 304 and the second expanding shaft 305 are limited by the limiting plate 302 to maintain the measurement stability, meeting the requirement of quickly and accurately measuring the axial clearances of the two axle gears on both sides inside the differential assembly, enabling the quick selection of the specifications of the axle gear gaskets, improving the assembly efficiency and assembly accuracy, and preventing faults such as loud noise and gear meshing burnout caused by unqualified axial clearances.

[0037] In this embodiment, preferably, a fastening bolt 307 is threadedly connected to the bottom end of the adjusting screw 301, and an anti - detachment plate 306 is provided on one side of the fastening bolt 307. The anti - detachment plate 306 provided on one side of the fastening bolt 307 can limit and prevent the first expanding shaft 304 and the second expanding shaft 305 from detaching, maintaining the installation stability of the first expanding shaft 304 and the second expanding shaft 305.

[0038] In this embodiment, preferably, the outer diameter of the anti - detachment plate 306 is larger than the diameter of the fastening bolt 307 and smaller than the bottom outer diameter of the second expanding shaft 305. The diameter of the anti - detachment plate 306 is between the inner diameter and the outer diameter of the second expanding shaft 305, facilitating the anti - detachment installation of the second expanding shaft 305.

[0039] In this embodiment, preferably, one end of the spring 303 is fixedly connected to the inner side of the base 201, and the other end of the spring 303 is fixedly connected to the limiting plate 302. The spring 303 is fixed on the base 201 to maintain the installation property, and the other end is connected to the limiting plate 302, facilitating the pushing of the limiting plate 302 to limit the first expanding shaft 304 and the second expanding shaft 305.

[0040] In this embodiment, preferably, a through - threaded hole 204 is opened on the base 201, the adjusting screw 301 is threadedly connected in the through - threaded hole 204, and a rotating hand - ring 308 is welded to one end of the adjusting screw 301. The through - threaded hole 204 facilitates the threaded installation of the adjusting screw 301, and the position of the adjusting screw 301 is adjusted by rotating the rotating hand - ring 308.

[0041] In this embodiment, preferably, threaded grooves 203 are formed on both sides of the base 201, and the cylinder 101 is fixedly connected to the base 201 through fixing bolts 103 and the threaded grooves 203. The settings of the threaded grooves 203 and the fixing bolts 103 facilitate the connection and installation of the positioning mechanism 1 and the expanding sleeve mechanism 2, maintaining integrity.

[0042] In this embodiment, preferably, an extension portion 102 is fixedly provided on the outer side of the bottom of the cylinder 101. The setting of the extension portion 102 facilitates the placement and removal of the device, and after measurement, it is convenient to remove the device.

[0043] In this embodiment, preferably, the inner side of the bottom end of the measuring wing 202 is set to be arc-shaped, and the second expanding shaft 305 is set to be a cone with a smaller diameter at the upper end and a larger diameter at the lower end. The inner side of the measuring wing 202 is set to be arc-shaped, and the second expanding shaft 305 is set to be a cone, which facilitates the displacement of the adjusting screw 301 to expand the measuring wing 202 and achieve measurement.

[0044] Principle and advantages of use:

[0045] When in use, the device is inserted into the differential assembly hole from one end, and the cylinder 101 in the positioning mechanism 1 is sleeved on the differential assembly. The inner hole of the cylinder 101 cooperates with the outer circle of one end of the differential assembly to play a role of stable guiding and supporting, maintaining stability. Then, by rotating the hand ring 308, the adjusting screw 301 is lifted and displaced, so that the fastening bolt 307 and the anti-disengagement plate 306 drive the conical surfaces of the first expanding shaft 304 and the second expanding shaft 305 to displace synchronously. The conical surface of the second expanding shaft 305 slides with the inner hole of the measuring wing 202, causing the outer circle of the measuring wing 202 to expand, and the outer circle of the measuring wing 202 is gradually tightened with the inner hole of the half shaft gear. The displacement result of the axial clearance of the half shaft gear is accurately and consistently reproduced on the expansion core type clearance measuring device, and the displacement clearance value can be accurately measured through the externally installed dial indicator. It preferably solves the problem of difficulty in accurately measuring the axial clearance of the half shaft gear.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A core expansion type gap measuring device, characterized in that: It comprises a positioning mechanism (1), an expansion sleeve mechanism (2) and an adjustment mechanism (3); the positioning mechanism (1) comprises a cylinder (101) matched with the outer circle of one end of the differential assembly; The expansion sleeve mechanism (2) comprises a base (201), and a plurality of measuring wings (202) for expansion are provided on the base (201); The adjusting mechanism (3) comprises an adjusting screw (301) and a spring (303); one end of the adjusting screw (301) is movably sleeved on a limit plate (302); one side of the limit plate (302) is provided with a first expansion shaft (304) and a second expansion shaft (305) sleeved on the adjusting screw (301).

2. The core expansion type gap measuring device according to claim 1, characterized in that: The bottom end of the adjusting screw rod (301) is threadedly connected to a fastening bolt (307), and an anti-drop plate (306) is provided on one side of the fastening bolt (307).

3. The core expansion type gap measuring device according to claim 2, characterized in that: The outer diameter of the anti-slip plate (306) is greater than the diameter of the fastening bolt (307), and smaller than the outer diameter of the bottom of the second expansion shaft (305).

4. The core expansion type gap measuring device according to claim 1, characterized in that: One end of the spring (303) is fixedly connected to the inner side of the base (201), and the other end of the spring (303) is fixedly connected to the limiting plate (302).

5. The core expansion type gap measuring device according to claim 1, characterized in that: A through threaded hole (204) is provided on the base (201), the adjusting screw (301) is threadedly connected in the through threaded hole (204), and a rotating bracelet (308) is welded to one end of the adjusting screw (301).

6. The core expansion type gap measuring device according to claim 1, characterized in that: Thread grooves (203) are provided on both sides of the base (201), and the cylinder (101) is fixedly connected to the base (201) via fixing bolts (103) and the thread grooves (203).

7. The core expansion type gap measuring device according to claim 1, characterized in that: An extension portion (102) is fixedly provided on the outer side of the bottom of the cylinder (101).

8. The core expansion type gap measuring device according to claim 1, characterized in that: The inner side of the bottom end of the measuring wing (202) is configured to be arc-shaped, and the second expansion shaft (305) is configured to be a cone with a small diameter at the upper end and a large diameter at the lower end.

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