Differential housing inner spherical surface diameter measuring device

Abstract

The utility model discloses a differential housing inner spherical surface diameter measuring device, which comprises a main body, a fixed end ball measuring head is connected to the lower part of the right side of the main body, the left side of the main body is provided with an up-and-down through groove hole, a horizontally arranged sliding shaft is installed in the groove hole, and two ends of the sliding shaft are connected with two side surfaces of the main body. The sliding shaft is sleeved with a sliding seat, the bottom of the sliding seat is connected with a movable end ball measuring head, the top of the sliding seat is provided with a small handle, the top of the main body is provided with a large handle, the position of the large handle corresponds to the position of the fixed end ball measuring head, and the side face, away from the fixed end ball measuring head, of the sliding seat is provided with a flat measuring head. The technical problems that in the prior art, manual detection efficiency is low, data are not accurate, large equipment detection procedures are complex, and detection cost is high are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring devices, and in particular relates to a device for measuring the inner spherical diameter of a differential housing. Background Art

[0002] The automobile differential is the main part of the drive axle. Its function is to transmit power to the two half-axles while allowing the two half-axles to rotate at different speeds, so that the wheels on both sides can travel at unequal distances in a pure rolling form as much as possible, reducing the friction between the tires and the ground. The differential is indispensable in the automobile transmission power system, and the size and position requirements of the differential's mounting holes and spherical surfaces are particularly important.

[0003] During the machining process, a certain proportion of sampling inspection is required to control the machining accuracy of the workpiece. Since the differential housing workpiece is irregular, its inner cavity is generally a small mouth and a large belly, and the inner spherical surface is a discontinuous surface, which makes it difficult to measure the inner spherical diameter. The color method or sample comparison is often used for measurement. Due to the special detection position, it is difficult to put the inspection tool into the inner cavity opening. It requires high experience and operation skills, and the efficiency is low. It is impossible to obtain quantitative data, and can only approximately judge whether the part is qualified; using an internal diameter micrometer for measurement, it is necessary to repeatedly find the highest point of the inner spherical surface, and the data collection is evaluated by several points. The measured data is inaccurate, and the detection efficiency is low in actual operation; while using large laboratory equipment such as coordinate measuring machines for direct measurement, although quantitative data can be obtained, the coordinate measuring machine itself is a general-purpose equipment with a high price and a slow detection speed, which is not suitable for mass production processes and on-site inspections. Utility Model Content

[0004] The utility model aims to provide a differential housing inner spherical diameter measuring device to solve the above-mentioned technical problems of low manual detection efficiency and inaccurate data and complex large equipment detection process and high detection cost in the prior art.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A device for measuring the spherical diameter inside a differential housing comprises: a main body, a fixed-end ball probe connected to the lower right side of the main body, a slot hole penetrating up and down the left side of the main body, a horizontally arranged sliding shaft installed in the slot hole, two ends of the sliding shaft connected to two side surfaces of the main body, a sliding seat mounted on the sliding shaft, a movable-end ball probe connected to the bottom of the sliding seat, a small handle on the top of the sliding seat, a large handle on the top of the main body, the position of the large handle corresponding to the position of the fixed-end ball probe, a flat probe on a side of the sliding seat away from the fixed-end ball probe, and the flat probe contacts the measuring head of a micrometer.

[0007] The utility model provides a device for measuring the spherical diameter inside a differential housing. A return spring is sleeved on a sliding shaft of a sliding seat close to a large handle, and the return spring keeps the sliding seat at the leftmost side.

[0008] The utility model provides a device for measuring the inner spherical diameter of a differential housing. The sliding shaft is a spline shaft, and a ball spline is arranged between the sliding seat and the sliding shaft.

[0009] The utility model provides a device for measuring the inner spherical diameter of a differential housing, wherein two sliding shafts are arranged in parallel up and down.

[0010] The utility model discloses a differential housing inner spherical diameter measuring device. A meter frame is arranged outside a main body at a position corresponding to the flat probe position. The meter frame is used to install a micrometer. A clamping meter sleeve is arranged between the micrometer and the meter frame.

[0011] The utility model discloses a device for measuring the inner spherical diameter of a differential housing. The sliding seat is provided with a tip set screw and a ball spline for fixing.

[0012] The utility model discloses a device for measuring the inner spherical diameter of a differential housing. A locking screw is provided on the main body and is connected with a sliding shaft.

[0013] The utility model discloses a device for measuring the inner spherical diameter of a differential housing. The top of the main body is provided with a dustproof plate. The dustproof plate is provided with a avoidance groove for a small handle to move.

[0014] The beneficial effects of the utility model are as follows: a device for measuring the inner spherical diameter of a differential housing is provided, which directly contacts the highest point of the inner spherical surface of a workpiece by arranging a pair of movable end ball probes and a fixed end ball probe, and does not need to search repeatedly, thereby reducing the cumulative error and improving the efficiency and accuracy of detection; by arranging a movable sliding seat, the movable end ball probe can be close to or away from the fixed end ball probe, thereby facilitating the insertion or removal of the workpiece; by arranging a reset spring, the movable end ball probe can maintain a measuring state in a natural state, thereby solving the problem of difficult operation when the measuring part is inserted through the opening of the inner cavity of the differential housing; when in use, the micrometer is first reset to zero with a calibration piece, and then the workpiece is measured, and the indicated value of the micrometer and the actual measured value of the calibration piece are converted to obtain the actual value of the inner spherical diameter of the measured workpiece, the measuring efficiency is high, the accuracy of the measuring result is greatly improved, and the requirement for the measuring skill level of the operator is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0016] Figure 1 It is a schematic diagram of an embodiment of the utility model;

[0017] Figure 2 It is a vertical cross-sectional view of an embodiment of the utility model;

[0018] Figure 3 It is a top cross-sectional view of an embodiment of the utility model;

[0019] Figure 4 is a calibration operation diagram of an embodiment of the utility model;

[0020] Figure 5 This is the first measurement state diagram of the embodiment of the utility model;

[0021] Figure 6 This is the second measurement state diagram of the embodiment of the utility model. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 1-6 As shown, a device for measuring the spherical diameter of a differential housing comprises: a main body 1, a fixed end ball probe 2 is connected to the lower right side of the main body 1, a slot hole 18 is provided on the left side of the main body 1 and runs through the main body 1 from top to bottom, a horizontally arranged sliding shaft 8 is installed in the slot hole 18, two ends of the sliding shaft 8 are connected to two side surfaces of the main body 1, a sliding seat 9 is sleeved on the sliding shaft 8, a movable end ball probe 3 is connected to the bottom of the sliding seat 9, a small handle 5 is provided on the top of the sliding seat 9, a large handle 4 is provided on the top of the main body 1, and the position of the large handle 4 is consistent with the fixed end The positions of the ball probes 2 correspond to each other. A side of the sliding seat 9 away from the fixed-end ball probe 2 has a flat probe 13. The flat probe 13 contacts the measuring head of the micrometer 7. The spherical outer dimensions of the fixed-end ball probe 2 and the movable-end ball probe 3 are made according to the lower limit tolerance of the inner spherical surface of the workpiece to be measured, so as to ensure that when measuring, the probe rests against the highest point of the inner spherical surface of the workpiece without repeated searching, thereby improving the efficiency and accuracy of detection. The flat probe 13 is coaxial with the micrometer on the table frame. When measuring, the change in the diameter of the workpiece to be measured is transmitted to the micrometer through the flat probe.

[0024] As a preferred embodiment, a return spring 15 is mounted on the sliding shaft 8 of the sliding seat 9 close to the large handle 4, and the return spring 15 keeps the sliding seat 9 at the leftmost position.

[0025] As a preferred embodiment, the sliding shaft 8 is a spline shaft, and there is a ball spline 10 between the sliding seat 9 and the sliding shaft 8. The ball spline, the spline outer cylinder is installed in the positioning hole inside the sliding seat, and is fixed in the keyway of the ball spline outer cylinder through the tip set screw in the screw hole on the side of the sliding seat to limit its position in the sliding seat; the spline shaft inside it is installed in the positioning sleeve. Because the ball spline uses the balls installed in the spline to roll smoothly in the precision-ground rolling groove at the same time, it has a high sensitivity and positioning accuracy; the ball row combines the spline shaft with the spline bearing sleeve, and the preload method can be adjusted to make the clearance in the rotation direction zero, thereby ensuring the accuracy of the transmission accuracy; the two ball splines are used side by side up and down, which can provide a better guiding effect, ensuring that the sliding seat and the movable end ball probe do not deviate when moving, thereby further improving the detection accuracy.

[0026] As a preferred embodiment, the sliding shafts 8 are two vertically parallely arranged.

[0027] As a preferred embodiment, a meter stand 12 is provided on the outer side of the main body 1 at a position corresponding to the flat probe 13 , and the meter stand 12 is used to install the micrometer 7 , and a clamping meter cover 14 is provided between the micrometer 7 and the meter stand 12 .

[0028] As a preferred embodiment, the sliding seat 9 is provided with a tip set screw 16 and a ball spline 10 for fixing.

[0029] As a preferred embodiment, a locking screw 17 is provided on the main body 1 and connected to the sliding shaft 8 .

[0030] As a preferred embodiment, the main body 1 has a dustproof plate on the top, and the dustproof plate has a avoidance groove 6 for the small handle 5 to move.

[0031] It should be noted that a reset spring 15 is provided on the outside of the sliding shaft 8, i.e., the spline shaft, wherein a positioning sleeve 11 is provided at the connection between the sliding shaft 8 and the main body 1, and the reset spring 15 is installed between the positioning sleeve 11 and the baffle, wherein the baffle is provided to prevent the reset spring 15 from contacting the spring ball spline 10. When the workpiece is placed in the inner cavity, the sliding seat 9 compresses the reset spring 15 under the drive of the small handle 5, and the movable end ball probe 3 is close to the fixed end ball probe 2, and the probe can be quickly placed through the opening of the workpiece inner cavity; when measuring, the small handle 5 is released, and under the action of the spring tension, the sliding seat 9 drives the ball probe to rest against the inner wall of the workpiece to complete the measurement. The use of two sets of springs can provide sufficient elastic force to ensure that the sliding seat 9 drives the movable end ball probe 3 to complete a large range of movement, and at the same time ensure that the force of the sliding seat 9 during the movement process is more balanced, thereby improving the detection accuracy of the inspection fixture.

[0032] 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 operated 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.

[0033] 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.

[0034] 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 differential case inner spherical diameter measuring device, characterized in that: include: A main body (1), wherein a fixed end ball probe (2) is connected to the lower right side of the main body (1), a slot hole (18) extending vertically through the left side of the main body (1), a horizontally arranged sliding shaft (8) is installed in the slot hole (18), two ends of the sliding shaft (8) are connected to two side surfaces of the main body (1), a sliding seat (9) is mounted on the sliding shaft (8), a movable end ball probe (3) is connected to the bottom of the sliding seat (9), a small handle (5) is provided on the top of the sliding seat (9), a large handle (4) is provided on the top of the main body (1), the position of the large handle (4) corresponds to the position of the fixed end ball probe (2), a flat probe (13) is provided on a side of the sliding seat (9) away from the fixed end ball probe (2), and the flat probe (13) contacts the measuring head of the micrometer (7).

2. The differential case inner spherical diameter measuring device according to claim 1, characterized in that: A return spring (15) is sleeved on the sliding shaft (8) on the side of the sliding seat (9) close to the large handle (4), and the return spring (15) keeps the sliding seat (9) at the leftmost position.

3. The differential case inner spherical diameter measuring device according to claim 2, characterized in that: The sliding shaft (8) is a spline shaft, and a ball spline (10) is provided between the sliding seat (9) and the sliding shaft (8).

4. The differential case inner spherical diameter measuring device according to claim 3, characterized in that: The sliding shafts (8) are two vertically parallel sliding shafts.

5. The differential case inner spherical diameter measuring device according to claim 4, characterized in that: A meter frame (12) is provided on the outside of the main body (1) at a position corresponding to the flat probe (13); the meter frame (12) is used to install a micrometer (7); and a clamping sleeve (14) is provided between the micrometer (7) and the meter frame (12).

6. The differential case inner spherical diameter measuring device according to claim 4, characterized in that: The sliding seat (9) is provided with a tip set screw (16) and a ball spline (10) for fixing.

7. The differential case inner spherical diameter measuring device according to claim 4, characterized in that: The main body (1) is provided with a locking screw (17) connected to the sliding shaft (8).

Images