Device for measuring distance between end face of inner cavity of differential shell and center of planet shaft hole

Abstract

The utility model discloses a device for measuring the distance between the end face of the inner cavity of a differential shell and the center of a planet shaft hole, which comprises a positioning shaft, a mounting groove is arranged at the bottom of the middle of the positioning shaft, a lever is hinged in the mounting groove through a rotating shaft, the lever can rotate in a vertical plane, and a ball measuring head is arranged at the bottom of the left end of the lever. The top of the right end of the lever is provided with a flat measuring head, the positioning shaft at the position corresponding to the flat measuring head is a measuring meter mounting part, the measuring meter mounting part is provided with a dial indicator, a measuring head of the dial indicator corresponds to the position of the flat measuring head, the left end of the positioning shaft is provided with a positioning part, and the positioning part is matched with a to-be-measured workpiece positioning hole of a to-be-measured workpiece. The ball measuring head is in contact with the surface of a transmission piece installed in the end face of the inner cavity of the to-be-measured workpiece. The technical problems that in the prior art, measurement operation is complex, professional personnel are needed for measurement, and the detection time is too long are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring devices, and in particular relates to a measuring device for measuring the distance between the inner cavity end face of a differential housing and the center of a planetary shaft hole. Background Art

[0002] The differential case is a containment and support part of the automobile differential. The inner cavity of the differential case is equipped with planetary gears, axle gears, planetary gear shafts and gaskets. The size of the inner cavity end face and the center of the planetary shaft directly affects the meshing accuracy and smooth operation of the axle gears and planetary gears, and the size requirements are strict. However, due to the space limitation of the inner cavity of the differential case after processing, the size cannot be directly measured. Currently, only three-coordinate detection can obtain accurate data. However, the operation of using special equipment to detect the distance between the inner cavity end face of the differential case and the center of the planetary shaft hole is complicated and requires professional personnel to perform detection. The equipment is costly to use and the detection time is long. The detection results are often not obtained in time, which affects the production rhythm and increases the product manufacturing cost. Utility Model Content

[0003] The utility model aims to provide a device for measuring the distance between the inner cavity end face of a differential housing and the center of a planetary shaft hole, so as to solve the technical problems of the prior art that the measurement operation is complicated, professional personnel are required for measurement, and the detection time is too long.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A device for measuring the distance between the inner cavity end face of a differential housing and the center of a planetary shaft hole, comprising: a positioning shaft, a mounting groove being provided at the middle bottom of the positioning shaft, a lever being hinged in the mounting groove via a rotating shaft, the lever being rotatable in a vertical plane, a ball probe being installed at the bottom of the left end of the lever, a flat probe being installed at the top of the right end of the lever, the positioning shaft at the corresponding position of the flat probe being a measuring gauge mounting portion, a micrometer being installed on the measuring gauge mounting portion, the probe of the micrometer corresponding to the position of the flat probe, a positioning portion being provided at the left end of the positioning shaft, the positioning portion being matched with the positioning hole of a workpiece to be measured of the workpiece to be measured, and the ball probe being in contact with the surface of a transmission member installed in the inner cavity end face of the workpiece to be measured.

[0006] The utility model provides a device for measuring the distance between the inner cavity end surface of a differential housing and the center of a planetary shaft hole. The bottom of the measuring gauge installation part is provided with a cover plate, and a spring is arranged between the cover plate and a lever.

[0007] The utility model provides a device for measuring the distance between the inner cavity end face of a differential housing and the center of a planetary shaft hole. A threaded plug is arranged at a position corresponding to the position of the spring and the cover plate, and the threaded plug is used to adjust the length of the spring.

[0008] The utility model provides a device for measuring the distance between the inner cavity end face of a differential housing and the center of a planetary shaft hole. A limiting screw is arranged above a positioning shaft between the rotating shaft and the micrometer.

[0009] The utility model provides a device for measuring the distance between the inner cavity end surface of a differential housing and the center of a planetary shaft hole. A clamping rod is installed above the right end of a lever, and the clamping rod can slide in a vertical direction.

[0010] The utility model provides a device for measuring the distance between the inner cavity end surface of a differential housing and the center of a planetary shaft hole. The measuring gauge mounting part is extended with a hand-held part, and the hand-held part and the positioning shaft are an integrated structure.

[0011] The beneficial effects of the utility model are as follows: a device for measuring the distance between the inner cavity end face of a differential housing and the center of a planetary shaft hole is proposed; a positioning shaft is arranged to match the positioning hole of a workpiece to be measured, and a mounting groove is arranged at the bottom of the positioning shaft, and a lever is hinged inside the positioning shaft, so that the measured value can be transmitted to the micrometer for measurement; the distance is measured by the principle of comparative measurement, thereby reducing the measurement error; the measuring device and the transmission part are used to transition between the calibration part and the measured part, and when in use, only the calibration part is used to set the micrometer of the measuring device to zero; then the workpiece is measured, and the indication of the micrometer and the actual measured value of the calibration part are converted to obtain the actual value of the measured distance, thus solving the problem of the inner cavity space limitation and the inability to directly measure; when in use, only the clamping screw is pressed down and the ball probe is retracted, so that it can be easily put in and taken out, the operation is simple, the measurement efficiency is high, the accuracy of the measurement result is greatly improved, and the requirement on the operator's measurement skill level is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0013] Figure 1 It is a schematic diagram of an embodiment of the utility model;

[0014] Figure 2 It is an axonometric diagram of an embodiment of the utility model;

[0015] Figure 3 It is a calibration state diagram of an embodiment of the utility model;

[0016] Figure 4 It is a schematic diagram of the measurement state of an embodiment of the utility model;

[0017] Figure 5 It is an axonometric diagram of the measurement state of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] like Figure 1-5 As shown, a device for measuring the distance between the inner cavity end face of a differential housing and the center of a planetary shaft hole comprises: a positioning shaft 1, a mounting groove 2 is provided at the middle bottom of the positioning shaft 1, a lever 3 is hinged in the mounting groove 2 through a rotating shaft 4, the lever 3 can rotate in a vertical plane, a ball probe 5 is installed at the bottom of the left end of the lever 3, a flat probe 6 is installed at the top of the right end of the lever 3, the positioning shaft 1 at the corresponding position of the flat probe 6 is a measuring gauge installation part 15, a micrometer 7 is installed on the measuring gauge installation part 15, the probe of the micrometer 7 corresponds to the position of the flat probe 6, the left end of the positioning shaft 1 has a positioning part 13, the positioning part 13 cooperates with the positioning hole 21 of the workpiece to be measured of the workpiece 20 to be measured, and the ball probe 5 contacts the surface of the transmission member 19 installed in the inner cavity end face 22 of the workpiece to be measured.

[0020] As a preferred embodiment, the bottom of the measuring meter mounting portion 15 has a cover plate 11, and a spring 9 is arranged between the cover plate 11 and the lever 3. The spring 9 is placed between the cover plate 11 and the lever 3, and the measuring force is constant to ensure the accurate reset of the lever 3 and the ball probe 5.

[0021] As a preferred embodiment, a threaded plug 10 is provided at the position corresponding to the position of the spring 9 and the cover plate 11, and the threaded plug 10 is used to adjust the length of the spring 9, that is, to adjust the compression amount of the spring.

[0022] As a preferred embodiment, a limit screw 8 is provided above the positioning shaft 1 between the rotating shaft 4 and the micrometer 7. The limit screw 8 is installed in a threaded hole on the side of the positioning shaft 1 to limit the position of the ball probe 5 retracted in the positioning shaft 1.

[0023] As a preferred embodiment, a clamping rod 12 is installed above the right end of the lever 3, and the clamping rod 12 can slide in the vertical direction.

[0024] As a preferred embodiment, the measuring meter installation portion 15 is extended with a hand-held portion 16 , and the hand-held portion 16 and the positioning shaft 1 are an integrated structure.

[0025] The ball probe 5 is mounted on the lever 3. Since the front end is spherical, during measurement, the contact part is point contact, which ensures the accuracy of the transmission of the distance variation.

[0026] The clamping rod 12 is installed in the through hole on the side of the positioning shaft 1, and has a screw hole at the tail for installing a clamping screw. By pressing the clamping screw, the clamping rod 12 rotates the lever 3 to control the retraction and exposure of the ball probe 5 on the positioning shaft.

[0027] It should be noted that the outer diameter of the positioning portion 13 of the positioning shaft 1 is made according to the lower limit of the aperture tolerance of the planetary shaft hole of the workpiece 20 to be measured, and is used to position the measuring device in the planetary hole of the differential housing; flat surfaces are made on both sides of the maximum outer circle of the positioning shaft 1, and a groove is made on one side of the shaft for installing the lever 3, which is fixed by a lateral pin shaft, and a screw hole is made on the flat surface on the same side for installing the cover plate 11; the flat surface on the other side is made with a screw hole and a through hole, and a limit screw 8, a clamping sleeve, and a clamping rod 12 are respectively installed.

[0028] According to the principle of comparative measurement, the calibration part 17 is made into a U shape, and the calibration part positioning holes 18 on both sides are made according to the size of the planetary shaft hole. The distance from the hole to the base surface is made according to the distance between the end face of the inner cavity of the differential housing and the center of the planetary shaft hole, and the actual measured value is measured; a positioning hole is made on the base surface of the calibration part 17 for placing the transmission part 19. The transmission member 19 is made into a stepped shaft structure, and the outer circle of the small end at the bottom is made according to the aperture smaller than the mounting hole of the half-shaft gear of the differential case, so as to facilitate insertion, and the distance from the support surface to the large end surface, i.e. the height, is made according to a fixed size; during calibration, the small end of the transmission member 19 is placed in the positioning hole of the base surface of the calibration member 17, and the support surface is placed on the base surface of the calibration member 17; the measuring device is placed in the calibration member positioning hole 18 on the side of the calibration member, and the ball probe 5 contacts the large end surface of the transmission member 19; during measurement, the transmission member 19 is placed in from the side of the inner cavity of the differential case, and the small end is placed in the half-shaft gear mounting hole, i.e., the inner cavity end surface 22 of the workpiece to be measured for matching installation, the support surface is placed on the inner cavity end surface, and the measuring device is placed in from the planetary shaft hole, i.e., the positioning hole 21 of the workpiece to be measured, and the ball probe 5 contacts the large end surface, i.e., the top surface, of the transmission member 19, thereby transmitting the distance change to the measuring device through the transmission member 19.

[0029] The lever 3 is installed in the installation groove 2 on the bottom surface of the positioning shaft 1, and has a pin hole in the middle for installing the rotating shaft 4. It is connected to the positioning shaft 1 through the rotating shaft 4 and can rotate around the core axis in the positioning shaft 1. There is a positioning hole on each side of the lever 3 for installing the ball probe 5 and the flat probe 6; because the distances from the positioning holes on both sides to the pin hole in the middle are equal, when the lever 3 rotates, the ball probe 5 and the flat probe 6 installed on both sides of the lever 3 rotate the same amount, so that the change in the measured distance is transmitted to the flat probe 6 through the ball probe 5 in a 1:1 ratio. The probe 6 is finally displayed by the micrometer 7; when the positioning shaft 1 is placed in the planetary shaft hole of the differential housing, the top tightening screw of the clamping rod 12 is pressed down, and the clamping rod 12 presses down the tail of the lever 3, and the other side of the lever 3 rotates synchronously, driving the ball probe 5 to rotate into the inside of the mounting groove 2 of the positioning shaft 1, while avoiding the inner wall of the planetary shaft hole; after the workpiece 20 to be measured is placed, the clamping screw is loosened, and under the action of the spring 9, the lever 3 rotates in the opposite direction, and the ball probe 5 contacts the transmission member 19 to complete the measurement.

[0030] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0032] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A device for measuring the distance between the inner end surface of a differential housing and the center of a planetary shaft hole, characterized in that: include: A positioning shaft (1), wherein the bottom of the middle of the positioning shaft (1) has a mounting groove (2), a lever (3) is hinged in the mounting groove (2) through a rotating shaft (4), and the lever (3) can rotate in a vertical plane. A ball probe (5) is installed at the bottom of the left end of the lever (3), and a flat probe (6) is installed at the top of the right end of the lever (3). The positioning shaft (1) at the corresponding position of the flat probe (6) is a measuring gauge installation part (15), and a micrometer (7) is installed on the measuring gauge installation part (15). The probe of the micrometer (7) corresponds to the position of the flat probe (6). The left end of the positioning shaft (1) has a positioning part (13), and the positioning part (13) cooperates with a positioning hole (21) of a workpiece to be measured (20). The ball probe (5) contacts the surface of a transmission member (19) installed in the end surface (22) of the inner cavity of the workpiece to be measured.

2. A device for measuring the distance between the inner cavity end surface of a differential case and the center of a planetary shaft hole according to claim 1, characterized in that: The bottom of the meter mounting portion (15) is provided with a cover plate (11), and a spring (9) is provided between the cover plate (11) and the lever (3).

3. A device for measuring the distance between the inner cavity end surface of a differential case and the center of a planetary shaft hole according to claim 2, characterized in that: A threaded plug (10) is provided at a position corresponding to the position of the spring (9) and the cover plate (11), and the threaded plug (10) is used to adjust the length of the spring (9).

4. A device for measuring the distance between the inner cavity end surface of a differential case and the center of a planetary shaft hole according to claim 2, characterized in that: A limit screw (8) is provided above the positioning shaft (1) between the rotating shaft (4) and the micrometer (7).

5. A device for measuring the distance between the inner cavity end surface of a differential case and the center of a planetary shaft hole according to claim 4, characterized in that: A clamping rod (12) is installed above the right end of the lever (3), and the clamping rod (12) can slide in the vertical direction.

6. A device for measuring the distance between the inner cavity end surface of a differential case and the center of a planetary shaft hole according to claim 5, characterized in that: A hand-held portion (16) extends from the measuring meter mounting portion (15), and the hand-held portion (16) and the positioning shaft (1) are an integrated structure.

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