Run-out detection device for internal spline of motor shaft

Abstract

The invention relates to a workpiece quality inspection tool, and provides a motor shaft internal spline runout detection device, which comprises a bottom plate, a first support frame arranged on the bottom plate, a second support frame arranged on the bottom plate, a dial indicator vertically arranged on the second support frame, a support seat arranged on the second support frame, and a detection rod hinged to the upper end of the support seat, the detection head is arranged at one end of the detection rod away from the dial indicator; the motor shaft is horizontally arranged on the first supporting frame, the detection head is arranged in the motor shaft and abuts against the internal spline, and the upper side wall of the end, away from the detection head, of the detection rod abuts against a measuring head of the dial indicator. The internal spline run-out detection device for the motor shaft can efficiently detect the run-out value of the internal spline of the motor shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece quality inspection tools, and in particular to a device for detecting spline runout in a motor shaft. Background Art

[0002] In shaft-type workpieces such as motor shafts, it is usually necessary to set internal splines or external splines on the connecting shafts. The internal splines are mainly used to realize the rotation and torque transmission between shafts and are common connection parts in mechanical transmission. It achieves close connection and power transmission between the two parts by meshing with the external splines (the same applies to the external splines).

[0003] After the internal spline is processed, the runout of the internal spline needs to be tested to evaluate its pass rate and the subsequent connection strength during use. The traditional internal spline strength test process is relatively complicated. It is necessary to put the measuring stick and butter into the internal spline, and then use the combination of the lever micrometer and the height gauge to test each tooth and record it, and finally calculate the runout value. This method can cope with the random inspection of samples, but if every motor shaft needs to be tested, or if a large number of tests are required in a short period of time, then this method is not only inefficient, but also a great burden on the workers. Therefore, it is necessary to design a more efficient spline runout detection device. Summary of the invention

[0004] The object of the present invention is to provide a motor shaft internal spline runout detection device, which can efficiently detect the internal spline runout value of the motor shaft.

[0005] An embodiment of the present invention is achieved through the following technical solutions: a motor shaft internal spline runout detection device of the present invention comprises a base plate, a first support frame arranged on the base plate, a second support frame arranged on the base plate, a micrometer vertically arranged on the second support frame, a support seat arranged on the second support frame, a detection rod hinged to the upper end of the support seat, and a detection head arranged at one end of the detection rod away from the micrometer; the motor shaft is horizontally arranged on the first support frame, the detection head is arranged inside the motor shaft and abuts against the internal spline, and the upper side wall of one end of the detection rod away from the detection head abuts against the measuring head of the micrometer.

[0006] Furthermore, the support seat and the detection rod are hinged via a hinge shaft; the distance between the hinge shaft and the detection head is A, the distance between the hinge shaft and the micrometer measuring rod is B, and A=B.

[0007] Furthermore, one end of the detection rod close to the detection head is connected to a spring, and one end of the spring away from the detection rod is connected to the support seat.

[0008] Furthermore, one end of the detection rod is provided with a detection head and a threaded hole is provided in the vertical direction. The detection head is threadedly connected to the threaded hole, and the lower end of the detection head protrudes from the lower side of the detection rod.

[0009] Furthermore, the lower end of the detection head is a spherical surface.

[0010] Furthermore, a fastening bolt is threadedly connected to the upper end of the threaded hole, and the lower end of the fastening bolt abuts against the upper end of the detection head.

[0011] Furthermore, a guide rail is provided on the bottom plate, and the first support frame and the second support frame are both slidably connected to the guide rail.

[0012] Furthermore, the first support frame includes a first slider slidably connected to the guide rail, a first groove arranged on the upper side of the first slider, a second slider slidably connected to the guide rail, and a second groove arranged on the upper side of the second slider; the two ends of the motor shaft are respectively arranged in the first groove and the second groove.

[0013] Furthermore, the second support frame includes a third slider slidably connected to the guide rail, and a bracket arranged on the third slider; the support seat is fixed on the third slider, and the micrometer is arranged on the bracket.

[0014] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: the motor shaft internal spline runout detection device of the present invention, when in use, places the motor shaft on the first support frame, and extends the detection head into the motor shaft and abuts against the spline, observes the percentage reading, and then slowly rotates the motor shaft so that the detection head contacts different positions of the internal spline, observes the reading of the micrometer again, and after multiple measurements, records the maximum and minimum readings of the micrometer, so that the fluctuation range can be calculated. In this way, without using a traditional measuring rod, the runout size of the internal spline of the motor shaft can be efficiently measured, and even if a large number of motor shafts need to be measured, it can be completed efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the structure of a motor shaft spline runout detection device provided by an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of a detection rod portion provided by an embodiment of the present invention;

[0018] Figure 3 A schematic structural diagram of the detection head part provided in an embodiment of the present invention.

[0019] Icons: 11-base plate, 12-guide rail, 13-motor shaft, 14-internal spline, 21-first slider, 22-second slider, 23-roller, 31-third slider, 32-support seat, 33-detection rod, 34-rotating shaft, 35-bracket, 36-micrometer, 37-threaded hole, 38-detection head, 39-fastening bolt, 310-spring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does 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.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 invention can be understood according to specific circumstances.

[0025] Example

[0026] The following is further described in conjunction with specific embodiments. Figure 1-3 As shown in the accompanying drawings, the motor shaft internal spline runout detection device of this embodiment includes a base plate 11, a first support frame arranged on the base plate 11, a second support frame arranged on the base plate 11, a micrometer 36 vertically arranged on the second support frame, a support base 32 arranged on the second support frame, a detection rod 33 hinged to the upper end of the support base 32, and a detection head 38 arranged at the end of the detection rod 33 away from the micrometer 36; the motor shaft 13 is horizontally arranged on the first support frame, the detection head 38 is arranged inside the motor shaft 13 and abuts against the internal spline 14, and the upper side wall of the end of the detection rod 33 away from the detection head 38 abuts against the measuring head of the micrometer 36. When in use, the motor shaft 13 is placed on the first support frame, and the detection head 38 is inserted into the motor shaft 13 and abutted against the spline, and the percentage reading is observed. Then, the motor shaft 13 is slowly rotated so that the detection head 38 contacts different positions of the internal spline 14, and the reading of the micrometer 36 is observed again. After multiple measurements, the maximum and minimum readings of the micrometer 36 are recorded, so that the fluctuation range can be calculated. In this way, the runout size of the internal spline 14 of the motor shaft 13 can be efficiently measured without using a traditional measuring rod, and even if a large number of motor shafts 13 need to be measured, it can be completed efficiently.

[0027] The support seat 32 and the detection rod 33 in this embodiment are hinged by a hinge shaft; the distance between the hinge shaft and the detection head 38 is A, and the distance between the hinge shaft and the measuring rod of the micrometer 36 is B, A = B. Specifically, the runout value of the spline is directly equal to the runout value of the micrometer 36, and no conversion is required.

[0028] In this embodiment, the end of the detection rod 33 close to the detection head 38 is connected to a spring 310, and the end of the spring 310 away from the detection rod 33 is connected to the support seat 32. Specifically, under the action of the spring 310, the detection head 38 can be closely attached to the internal spline 14 of the motor shaft 13.

[0029] The detection rod 33 in this embodiment is provided with a detection head 38, and one end thereof is provided with a threaded hole 37 in the vertical direction. The detection head 38 is threadedly connected to the threaded hole 37, and the lower end of the detection head 38 protrudes from the lower side of the detection rod 33. Specifically, the detection head 38 can be finely adjusted in the upper and lower positions according to different sizes of the motor shaft 13 by twisting the detection head 38, so that during the detection process, the detection rod 33 is in a horizontal state as much as possible.

[0030] The lower end of the detection head 38 in this embodiment is a spherical surface, which makes it easier for the detection head 38 to move on the internal spline 14 and allows the lower end of the detection head 38 to penetrate into the internal spline 14 .

[0031] The upper end of the threaded hole 37 in this embodiment is threadedly connected with a fastening bolt 39, and the lower end of the fastening bolt 39 abuts against the upper end of the detection head 38. Specifically, by abutting the detection head 38 with the fastening bolt 39, loosening of the detection head 38 can be avoided during operation.

[0032] The base plate 11 in this embodiment is provided with a guide rail 12, and the first support frame and the second support frame are both slidably connected to the guide rail 12. The first support frame includes a first slider 21 slidably connected to the guide rail 12, a first groove arranged on the upper side of the first slider 21, a second slider 22 slidably connected to the guide rail 12, and a second groove arranged on the upper side of the second slider 22; the two ends of the motor shaft 13 are respectively arranged in the first groove and the second groove. The second support frame includes a third slider 31 slidably connected to the guide rail 12, and a bracket 35 arranged on the third slider 31; the support seat 32 is fixed on the third slider 31, and the micrometer 36 is arranged on the bracket 35. Specifically, the first support frame is set as an independent first slider 21 and a second slider 22, so that the spacing between the first slider 21 and the second slider 22 can be adjusted accordingly according to the specific length of the motor shaft 13. And after the motor shaft 13 is fixed on the first support frame, the detection head 38 can be extended into the inner spline 14 of the motor shaft 13 by moving the third slider 31 to make it close to the motor shaft 13. In addition, since the motor shaft 13 needs to rotate, in order to prevent the first groove and the second groove from scratching the motor shaft 13, rollers 23 can also be set on the sides of the first groove and the second groove, and the motor shaft 13 can be supported by the rollers 23.

[0033] In summary, the motor shaft internal spline runout detection device of the present embodiment, when in use, places the motor shaft 13 on the first support frame, and extends the detection head 38 into the motor shaft 13 and abuts against the spline, observes the percentage reading, and then slowly rotates the motor shaft 13 so that the detection head 38 contacts different positions of the internal spline 14, observes the reading of the micrometer 36 again, and after multiple measurements, records the maximum and minimum readings of the micrometer 36, so that the fluctuation range can be calculated. In this way, without using a traditional measuring rod, the runout size of the internal spline 14 of the motor shaft 13 can be efficiently measured, and even if a large number of motor shafts 13 need to be measured, it can be completed efficiently.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motor shaft internal spline runout detection device, characterized in that: The invention comprises a bottom plate (11), a first support frame arranged on the bottom plate (11), a second support frame arranged on the bottom plate (11), a micrometer (36) arranged vertically on the second support frame, a support seat (32) arranged on the second support frame, a detection rod (33) hinged to the upper end of the support seat (32), and a detection head (38) arranged on the end of the detection rod (33) away from the micrometer (36); The motor shaft (13) is horizontally arranged on the first support frame, the detection head (38) is arranged inside the motor shaft (13) and abuts against the internal spline (14), and the upper side wall of one end of the detection rod (33) away from the detection head (38) abuts against the measuring head of the micrometer (36).

2. The motor shaft inner spline runout detection device according to claim 1, characterized in that: The support seat (32) and the detection rod (33) are hinged via a hinge shaft; the distance between the hinge shaft and the detection head (38) is A, and the distance between the hinge shaft and the measuring rod of the micrometer (36) is B, and A=B.

3. The motor shaft inner spline runout detection device according to claim 2, characterized in that: One end of the detection rod (33) close to the detection head (38) is connected to a spring (310), and one end of the spring (310) away from the detection rod (33) is connected to the support seat (32).

4. The motor shaft inner spline runout detection device according to claim 1, characterized in that: The detection rod (33) is provided with a detection head (38) at one end thereof, and a threaded hole (37) is provided in the vertical direction. The detection head (38) is threadedly connected to the threaded hole (37), and the lower end of the detection head (38) protrudes from the lower side of the detection rod (33).

5. The motor shaft inner spline runout detection device according to claim 4, characterized in that: The lower end of the detection head (38) is a spherical surface.

6. The motor shaft inner spline runout detection device according to claim 4, characterized in that: A fastening bolt (39) is threadedly connected to the upper end of the threaded hole (37), and the lower end of the fastening bolt (39) abuts against the upper end of the detection head (38).

7. The motor shaft inner spline runout detection device according to claim 1, characterized in that: A guide rail (12) is provided on the bottom plate (11), and the first support frame and the second support frame are both slidably connected to the guide rail (12).

8. The motor shaft inner spline runout detection device according to claim 7, characterized in that: The first support frame comprises a first slider (21) slidably connected to the guide rail (12), a first groove arranged on the upper side of the first slider (21), a second slider (22) slidably connected to the guide rail (12), and a second groove arranged on the upper side of the second slider (22); the two ends of the motor shaft (13) are respectively arranged in the first groove and the second groove.

9. The motor shaft inner spline runout detection device according to claim 7, characterized in that: The second support frame comprises a third slider (31) slidably connected to the guide rail (12), and a bracket (35) arranged on the third slider (31); the support seat (32) is fixedly arranged on the third slider (31), and the micrometer (36) is arranged on the bracket (35).

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