Measuring device for diameter of inner spherical surface of besides-star wheel

Abstract

The utility model discloses a device for measuring the diameter of an inner spherical surface of a besides-star wheel, which is used for at least measuring the diameters of the inner spherical surfaces of a first part and a second part of a workpiece. The measuring device comprises a base, a main body, a measuring push rod, an end cover, a measuring head, a meter, a lever and a reference adjusting mechanism. During measurement, the inclined surface of the measuring head always abuts against the conical surface of the measuring push rod. The reference adjusting mechanism is used for adjusting the height of the reference surface relative to the body. When the reference surface is located at the first height, the meter displays the measurement data of the first part; and when the reference surface is at the second height, the meter displays the measurement data of the second part. The measuring device can continuously measure the diameters of the inner spherical surfaces of two different parts of the workpiece, and is high in detection precision and high in speed.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, in particular to a device for measuring the inner spherical diameter of an outer planetary wheel. Background Art

[0002] The outer star wheel is the main force-bearing component of the automobile transmission shaft. Its working conditions are extremely complex. Its performance directly affects the safety and reliability of the automobile transmission. Figure 1 As shown, the outer star wheel includes a wheel handle and a wheel head, and the inner wall of the wheel head forms a plurality of ballways for accommodating steel balls and an inner spherical surface located between two adjacent ballways. The accuracy of the inner spherical surface diameter of the outer star wheel will affect the stability of the entire transmission system.

[0003] The existing measurement methods for the inner spherical diameter of the outer star wheel are: 1. Use an inner diameter plug gauge for measurement, but due to the large size of the inner hole, it can generally only be made into a non-full-shape plug gauge, which requires high skills when measuring and can only measure such as Figure 1 The inner spherical diameter at section A shown in the figure cannot be measured at section B, so it is impossible to confirm whether the diameter at section B meets the requirements of the drawing, and the actual value cannot be known; 2. Although the actual value can be known by measuring with a vernier caliper, the inner spherical diameter at section B cannot be measured.

[0004] In view of the limitations of existing measuring devices, it is necessary to design a new measuring device to overcome the shortcomings of the prior art. Utility Model Content

[0005] One of the purposes of the utility model is to provide a device for measuring the inner spherical diameter of an outer planetary wheel, which is easy to operate, can accurately and quickly measure the inner spherical diameter of a workpiece, and can continuously measure the inner spherical diameters of two different parts of the workpiece.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions.

[0007] The utility model provides a device for measuring the inner spherical diameter of an outer star wheel, which is used to measure the inner spherical diameter of a workpiece at least at a first portion and a second portion, and comprises a base, a main body, a measuring push rod, an end cover, a measuring head, a meter, a lever, and a reference adjustment mechanism; the main body is arranged on the base; the measuring push rod can be movably arranged in the main body up and down, the measuring push rod has a top and a bottom, and the top has a conical surface; the end cover is fixed on the main body and covers the top of the measuring push rod, and the end cover is provided with a plurality of radial grooves to accommodate the measuring head; the measuring head can be slidably arranged in the radial groove, and the measuring head has an end face and an inclined surface; the end face faces outside the end cover, and is used to contact with the inner spherical surface of the workpiece during measurement. ; The inclined surface extends into the end cover and abuts against the conical surface of the measuring push rod; the meter is arranged on the base; the lever is arranged on the base, and the lever has a first end and a second end, the first end is connected to the bottom of the measuring push rod, and the second end is connected to the meter; the reference adjustment mechanism has a reference surface for carrying the workpiece; the reference adjustment mechanism can be movably arranged on the main body up and down to adjust the height of the reference surface relative to the main body; the reference surface has at least a first height and a second height; when the reference surface is at the first height, the end face of the measuring head is aligned with the first part of the workpiece; when the reference surface is at the second height, the end face of the measuring head is aligned with the second part of the workpiece.

[0008] Optionally, the reference adjustment mechanism includes a reference ring and a lifting ring, both of which surround the outer circumference of the main body and move up and down, wherein the lower surface of the reference ring contacts the upper surface of the lifting ring, and the upper surface of the reference ring is the reference surface.

[0009] Optionally, the reference ring is provided with a radial positioning hole; an axial groove is provided on the outer circumferential surface of the main body, and the axial groove corresponds to the radial positioning hole; a radial pin passes through the radial positioning hole and extends into the axial groove, so that the reference ring can move up and down relative to the main body and limit the rotation of the reference ring relative to the main body; the reference ring is also provided with two axial positioning holes for positioning pins to be vertically arranged therein, and the workpiece is positioned on the reference ring by the positioning pins during measurement.

[0010] Optionally, at least one axial keyway is provided on the inner circumferential surface of the lifting ring; a radial pin hole is provided on the outer circumferential surface of the main body; a radial fixing pin is arranged in the radial pin hole, one end of the radial fixing pin extends out of the outer circumferential surface of the main body, and the other end of the radial fixing pin can selectively enter the axial keyway; when the axial keyway of the lifting ring is aligned with the radial fixing pin, the other end of the radial fixing pin enters the axial keyway, and the lifting ring can move up and down but cannot rotate relative to the main body; when the axial keyway of the lifting ring leaves the radial fixing pin, the lifting ring is rotated and supported by the radial fixing pin.

[0011] Optionally, the measuring device further includes a gasket, which is sleeved on the outer circumferential surface of the main body and contacts the upper surface of the base; when the lifting ring descends to the reference plane and reaches the second height, the lower surface of the lifting ring contacts the gasket.

[0012] Optionally, the measuring device also includes a push rod limiting mechanism, which includes a limiting rod, a hinge seat and a manual button, wherein the hinge seat and the manual button are both fixed to the base; a transverse waist-shaped hole is provided at the bottom of the measuring push rod, and the limiting rod passes through the transverse waist-shaped hole to connect the hinge seat and the manual button.

[0013] Optionally, the end cover has an inner concave cavity for accommodating the top of the measuring push rod; the radial slide groove radially penetrates the outer circumferential surface of the end cover and the inner concave cavity; the end cover is also provided with an annular groove, which is located between the outer circumferential surface of the end cover and the inner concave cavity; a reset spring is provided in the annular groove, and the reset spring passes through the spring receiving hole of the measuring head to force the inclined surface of the measuring head to always fit the conical surface of the measuring push rod; the end cover is also provided with a threaded hole, which is installed in the threaded hole by an adjusting screw and the lower end of the adjusting screw extends into the inner concave cavity of the end cover, so as to limit the upper limit of the movement of the measuring push rod and control the maximum extension of the measuring head.

[0014] Optionally, a stepped hole is provided on the main body, the top of the measuring push rod extends upward from the stepped hole, and the bottom extends downward and is located on the lower surface of the base; a rotating support is provided on the lower surface of the base, and the lever is rotatably provided on the base through the rotating support; the meter is connected to the second end of the lever through a transition rod.

[0015] In summary, the beneficial effects of the utility model are as follows: the measuring device can quickly measure the inner spherical diameter of the workpiece by setting the conical surface of the measuring push rod and the inclined surface of the measuring head, and the two cooperate with each other; the measuring device can also quickly change the height of the reference surface by setting a reference adjustment mechanism, so as to measure the inner spherical diameter of different parts of the workpiece. The measuring device of the utility model is easy to operate and the measurement result is accurate. In addition, the utility model sets the rotating support and the lever on the lower surface of the base, so that the connection part between the measuring push rod and the lever, and the connection part between the transition rod and the lever are all located on the lower surface of the base, thereby ensuring that the movement of the lever of the measuring device is not disturbed by the outside world, thereby improving the safety and stability of the entire measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the cross section of the outer star wheel workpiece;

[0018] Figure 2 The three-dimensional structure diagram of a measuring device according to one embodiment of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 3 The three-dimensional structure diagram of a measuring device according to one embodiment of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 4 It is a schematic diagram of the transverse cross-sectional structure of a measuring device according to one embodiment of the utility model;

[0021] Figure 5 A schematic diagram of the longitudinal cross-sectional structure of a measuring device according to one embodiment of the present utility model;

[0022] Figure 6 It is a three-dimensional structural schematic diagram of an end cover of a measuring device according to one embodiment of the utility model;

[0023] Figure 7 A schematic diagram of the structure of a measuring head of a measuring device according to one embodiment of the utility model;

[0024] Figure 8 It is a schematic diagram of the top view of the reference circle of the measuring device according to one embodiment of the utility model;

[0025] Fig.9AIt is a schematic cross-sectional structure diagram of a lifting ring of a measuring device according to one embodiment of the utility model;

[0026] Fig. 9B It is a schematic diagram of the top view of the lifting ring of the measuring device according to one embodiment of the utility model;

[0027] Fig. 10A A cross-sectional view of a calibration block of a measuring device according to one embodiment of the present invention;

[0028] Fig. 10B FIG. 1 is a top view of a calibration block of a measuring device according to one embodiment of the present invention.

[0029] Description of main reference numerals:

[0030] Alien wheel 100 Wheel handle 101

[0031] Wheel head 102 Fairway 103

[0032] Inner sphere 104 Sections A and B

[0033] Measuring device 1 Base 10

[0034] Plate 11 Support column 12

[0035] Mounting hole 13 Main body 20

[0036] Cavity 21 Axial groove 22

[0037] Radial pin hole 23 Radial fixing pin 24

[0038] Washer 25 Measuring push rod 30

[0039] Conical surface 301 Compression spring 31

[0040] Horizontal waist hole 32 end cap 40

[0041] Radial slot 401 Inner concave cavity 41

[0042] Ring groove 42 Return spring 43

[0043] Threaded hole 44 Adjusting screw 45

[0044] Measuring head 50 End face 501

[0045] Inclined surface 502 Spring receiving hole 51

[0046] Meter 60 Meter stand 61

[0047] Transition rod 62 Lever 70

[0048] First end 701 Second end 702

[0049] Reference adjustment mechanism 80 Reference surface 801

[0050] Reference ring 81 Radial positioning hole 810

[0051] Axial positioning hole 811 Lifting ring 82

[0052] Axial keyway 820 Through hole 821

[0053] Radial pin 83 Positioning pin 84

[0054] Handle 85 Push rod limit mechanism 9

[0055] Limit rod 90 Hinge seat 91

[0056] Manual button 92 Proofing block 900

[0057] Guide positioning groove 901. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, in the absence of contrary instructions, the directional words used, such as "up", "down", "left" and "right", can be the direction of the actual use or working state of the device, can also be the direction of the drawing in the referenced drawings, and can also refer to two relative directions; while "inside" and "outside" refer to the outline of the device.

[0059] An embodiment of the present invention provides a device for measuring the inner spherical diameter of an outer star wheel, which is used to measure the inner spherical diameter of an outer star wheel 100 (or workpiece). Figure 1 As shown, the outer planet wheel 100 includes a wheel handle 101 and a wheel head 102. The inner wall of the wheel head 102 forms a plurality of ballways 103 for accommodating steel balls and an inner spherical surface 104 located between two adjacent ballways 103. The measuring device of the utility model is used to measure the inner spherical surface diameter of the outer planet wheel 100, and can obtain the inner spherical surface diameters of two different parts. For example, the section A close to the opening position is the first part, and the section B far from the opening position is the second part.

[0060] Please also refer to Figure 2, Figure 3 , Figure 4 and Figure 5 As shown, the measuring device 1 of one embodiment of the utility model mainly includes a base 10, a main body 20, a measuring push rod 30, an end cover 40, a measuring head 50, a meter 60, a lever 70, and a reference adjustment mechanism 80. The main body 20 is arranged on the base 10. The measuring push rod 30 can be movably arranged in the main body 20 up and down. The measuring push rod 30 has a top and a bottom. The top has a conical surface 301 (see Figure 4 The end cover 40 is fixed on the main body 20 and covers the top of the measuring push rod 30. The end cover 40 is provided with a plurality of radial grooves 401 (see Figure 6 ) to accommodate the measuring head 50. The measuring head 50 is slidably disposed in the radial slide groove 401, and the measuring head 50 has an end face 501 and an inclined surface 502; the end face 501 faces outside the end cover 40, and is used to contact the inner spherical surface 104 of the workpiece during measurement; the inclined surface 502 extends into the end cover 40 and abuts against the conical surface 301 of the measuring push rod 30. The meter 60 is disposed on the base 10. The lever 70 is disposed on the base 10, and the lever 70 has a first end 701 and a second end 702, the first end 701 is connected to the bottom of the measuring push rod 30, and the second end 702 is connected to the meter 60. The reference adjustment mechanism 80 has a reference surface 801 for supporting the workpiece; the reference adjustment mechanism 80 can be movably arranged on the main body 20 up and down to adjust the height of the reference surface 801 relative to the main body; the reference surface 801 has at least a first height and a second height. When the reference surface 801 is at the first height, the end surface 501 of the measuring head 50 is aligned with the first part of the workpiece; when the reference surface 801 is at the second height, the end surface 501 of the measuring head 50 is aligned with the second part of the workpiece.

[0061] Please also refer to Figures 1 to 5 As shown, the measuring method of the measuring device 1 of one embodiment of the utility model is:

[0062] When measuring the inner spherical diameter of a workpiece (such as the outer planetary wheel 100 ), the workpiece is placed on the reference surface 801 , with the inner spherical surface 104 of the workpiece facing the end cover 40 ;

[0063] If the workpiece is a standard workpiece, the meter 60 will display the preset value;

[0064] If the inner spherical diameter of the workpiece is smaller than the standard value, the inner spherical surface 104 of the workpiece presses the end surface 501 of the measuring head 50 inward, and the inclined surface 502 of the measuring head 50 pushes the conical surface 301 of the measuring push rod 30 and forces the measuring push rod 30 to move downward, and the measuring push rod 30 presses down the first end 701 of the lever 70, and the second end 702 of the lever 70 rises, and the meter 60 displays the measurement data at this time; wherein the measurement data can be a relative value, and then the actual value of the inner spherical diameter is obtained by calculation;

[0065] If the inner spherical diameter of the workpiece is greater than the standard value, the second end 702 of the lever 70 drops, the first end 701 of the lever 70 rises and forces the measuring push rod 30 to move upward, and the conical surface 301 of the measuring push rod 30 pushes the inclined surface 502 of the measuring head 50 to slide away from the measuring push rod 30 until the end surface 501 of the measuring head 50 contacts the inner spherical surface 104 of the workpiece. At this time, the meter 60 displays the measurement data; the measurement data can be a relative value, and then the actual value of the inner spherical diameter is obtained by calculation.

[0066] Furthermore, when it is necessary to measure the inner spherical diameter of different parts of the workpiece (for example, section A close to the opening position and section B away from the opening position), the height of the reference plane 801 is adjusted by adjusting the upper and lower positions of the reference adjustment mechanism 80 relative to the main body 20; for example, when the reference adjustment mechanism 80 rises until the reference plane 801 reaches a first height, the inner spherical diameter of the workpiece at section A can be measured; when the reference adjustment mechanism 80 descends until the reference plane 801 reaches a second height, the inner spherical diameter of the workpiece at section B can be measured.

[0067] The structures and matching relationships of the various components of the measuring device 1 according to an embodiment of the present utility model will be described in detail below.

[0068] like Figure 2 and Figure 3 As shown, the base 10 is used as an operating table to carry the entire measuring device 1. In one embodiment of the utility model, the base 10 includes a flat plate 11 and a support column 12; the support column 12 can be a plurality of equal-height columns symmetrically arranged below the flat plate 11 to stably support the flat plate 11. The base 10 is provided with at least one mounting hole 13 that passes through the upper and lower surfaces of the flat plate 11.

[0069] In one embodiment of the present invention, Figure 4 As shown, the main body 20 is arranged on the flat plate 11 of the base 10 and has a cavity 21. The main body 20 is cylindrical, and the cavity 21 is a stepped hole that penetrates the main body 20 along the axial direction, and is used for the measurement push rod 30 to be assembled. The stepped hole is located at the center of the main body 20. During installation, the main body 20 is screwed into the bottom of the flat plate 11 by screws, so that the main body 20 is fixed to the base 10. At this time, the cavity 21 (i.e., the stepped hole) of the main body 20 is aligned with the mounting hole 13 of the base 10, so that the bottom of the measurement push rod 30 can pass through.

[0070] In one embodiment of the present invention, Figure 4As shown, the measuring push rod 30 can be movably or movable up and down in the cavity 21 of the main body 20. The measuring push rod 30 is longitudinally long, with its top extending into the cavity 21 or extending upward from the cavity 21, and its bottom extending downward from the cavity 21 and passing through the mounting hole 13 of the base 10. The measuring push rod 30 is a stepped rod to adapt to the shape of the stepped hole, and can move up and down in the stepped hole. Specifically, a compression spring 31 is provided in the stepped hole to provide an upward force for the measuring push rod 30 at all times. In this embodiment, the conical surface 301 is the outer peripheral surface of the top.

[0071] In one embodiment of the present invention, Figure 4 and Figure 6 As shown, the end cover 40 is fixed to the main body 20. Specifically, the end cover 40 is fixed to the top surface of the main body 20 by a plurality of screws (for example, three). Figure 6 As shown, the end cover 40 has an inner concave cavity 41 located at its center. A radial groove 401 penetrates the outer circumferential surface of the end cover 40 and the inner concave cavity 41 in a radial direction; the inner concave cavity 41 is used to accommodate the top of the measuring push rod 30. The end cover 40 has two, three or more radial grooves 401 evenly arranged along the circumferential direction, and the radial grooves 401 are rectangular grooves or rectangular openings. The end cover 40 is also provided with an annular groove 42, which is located between the outer circumferential surface and the inner concave cavity 41, and a return spring 43 (see Figure 4 ) is used to provide an inward force for the measuring head 50 so that the inclined surface 502 of the measuring head 50 always fits with the conical surface 301 of the measuring push rod 30. The end cover 40 is also provided with a threaded hole 44, which is located in the middle of the top of the end cover 40. An adjusting screw 45 is installed in the threaded hole 44 and the lower end of the adjusting screw 45 extends into the inner concave cavity 41 of the end cover 40. During measurement, the lower end of the adjusting screw 45 can contact the top of the measuring push rod 30 to limit the upper limit of the movement of the measuring push rod 30. Therefore, by adjusting the extension length of the adjusting screw 45, the upper limit of the movement of the measuring push rod 30 can be adjusted, thereby controlling the maximum extension of the measuring head 50.

[0072] In one embodiment of the present invention, Figure 7 As shown, each measuring head 50 is slidably disposed in a radial slot 401 (see FIG. Figure 6 ). Figure 7As shown, the measuring head 50 is roughly a rectangular head, the end face 501 is the right end face, and the inclined surface 502 is the left end face. In an embodiment of the utility model, the inclined surface 502 can be an inclined plane or other slightly inclined surface, as long as the inclined surface 502 can roughly match the shape of the conical surface 301 of the measuring push rod 30 and can be against the conical surface 301 to push or squeeze the conical surface 301 or be pushed or squeezed by the conical surface 301. The measuring head 50 is provided with a spring receiving hole 51 for receiving the reset spring 43 (see Figure 4 ) passes through, the reset spring 43 can provide an inward tensioning force for the measuring head 50, so that the inclined surface 502 of the measuring head 50 is always in contact or fit with the conical surface 301 of the measuring push rod 30.

[0073] In one embodiment of the present invention, Figure 2 and Figure 4 As shown, the meter 60 is not directly set on the flat plate 11 of the base 10, but is indirectly set on the flat plate 11 of the base 10 through a meter seat 61, and the meter 60 is also connected to the second end 702 of the lever 70 through a transition rod 62. The transition rod 62 is connected to the probe of the meter 60, and the meter 60 is used to respond to the up and down displacement of the transition rod 62. The inner spherical diameter of the workpiece can be obtained by comparative measurement. In one embodiment, the meter 60 is a dial indicator, which can measure relative values, and then the value of the inner spherical diameter can be obtained by calculation. Rotating support 71

[0074] In one embodiment of the present invention, Figure 3 and Figure 4 As shown, the lever 70 is arranged on the flat plate 11 of the base 10 through a rotating support 71, and the rotating support 71 is fixed to the lower surface of the base 10 (that is, the lower surface of the flat plate 11), so the lever 70 is located below the base 10 (that is, below the flat plate 11), and the first end 701 of the lever 70 is connected to the bottom of the measuring push rod 30, and the second end 702 of the lever 70 is indirectly connected to the meter 60 by connecting to the bottom end of the transition rod 62. Here, the so-called connection can be a contact connection or abutment, that is, the two connected are not actually riveted or hinged together. Of course, the so-called connection can also be a substantial structural buckle, as long as it is ensured that the two ends of the lever 70 can be smoothly lifted or pressed down.

[0075] The utility model arranges the rotating support 71 and the lever 70 on the lower surface of the base 10 (that is, the lower surface of the plate 11), so that the connecting part between the measuring push rod 30 and the lever 70, and the connecting part between the transition rod 62 and the lever 70 are both located on the lower surface of the base 10, thereby ensuring that the movement of the lever 70 of the measuring device 1 is not interfered with by the outside world, or in other words, the measuring device 1 is not easily damaged by accidental touch, thereby improving the safety and stability of the entire measuring device 1.

[0076] In an embodiment of the present invention, the reference adjustment mechanism 80 can be movably mounted on (or configured or disposed on) the main body 20 to adjust the reference surface 801 to a first height and a second height.

[0077] Please refer to Figure 2 , Figure 4 and Figure 5 As shown, the reference adjustment mechanism 80 includes a reference ring 81 and a lifting ring 82. Both the reference ring 81 and the lifting ring 82 surround the outer circumference of the main body 20 and can move up and down together. The lifting ring 82 supports the reference ring 81. For example, the lower surface of the reference ring 81 contacts the upper surface of the lifting ring 82, and the upper surface of the reference ring 81 is the reference surface 801, which is used to support the workpiece.

[0078] Please combine Figure 4 and Figure 8 As shown, the reference ring 81 is annular and is provided with a radial positioning hole 810. The radial positioning hole 810 passes through the inner circumference and the outer circumference of the reference ring 81. Correspondingly, an axial groove 22 is provided on the outer circumference of the main body 20. A radial pin 83 is used to pass through the radial positioning hole 810 and extend into the axial groove 22. At this time, the reference ring 81 can move up and down along the main body 20, but cannot rotate relative to the main body 20. In this embodiment, the axial groove 22 extends downward from the top surface of the main body 20 to a certain vertical length. The vertical length can be determined according to the range of the up and down movement of the reference ring 81. The movement range of the reference ring 81 is limited by the vertical length of the axial groove 22. In addition, the reference ring 81 is also provided with two axial positioning holes 811 for the positioning pin 84 (see Figure 2 ) is vertically arranged therein, and the positioning pin 84 is used to position the workpiece on the reference circle 81. For example, when measuring, the positioning pin 84 can be inserted into the ball channel 103 of the workpiece to fix the workpiece.

[0079] Please combine Figure 4 , Figure 5 , Fig.9A and Fig. 9BThe structure of the lifting ring 82 shown in the figure is provided with at least one axial keyway 820 on the inner circumference of the lifting ring 82, and the axial keyway 820 penetrates the upper and lower surfaces of the lifting ring 82. Correspondingly, a radial pin hole 23 is provided on the outer circumference of the main body 20, and the radial pin hole 23 extends toward the cavity 21 along the radial direction of the main body 20. The radial fixing pin 24 is arranged in the radial pin hole 23 and one end of the radial fixing pin 24 protrudes or exposes the outer circumference of the main body 20, for example, it can protrude about 5mm; the other end of the radial fixing pin 24 can selectively enter the axial keyway 820. In detail, when the axial keyway 820 of the lifting ring 82 is aligned with the radial fixing pin 24, one end of the radial fixing pin 24 will enter the axial keyway 820, and the lifting ring 82 can move up and down or slide, but cannot rotate relative to the main body 20. When the axial keyway 820 of the lifting ring 82 leaves the radial fixing pin 24, the lifting ring 82 is rotated to a certain angle, and the radial fixing pin 24 can support the lifting ring 82. In the embodiment of the utility model, there are two axial keyways 820 symmetrically arranged on the inner circumference of the lifting ring 82; similarly, there are two radial fixing pins 24; this allows the up and down movement and positioning of the lifting ring 82 to be more stable.

[0080] More specifically, when the lifting ring 82 is lifted to a certain height, jumps over the radial fixing pin 24, or the axial keyway 820 is free from the restraint of the radial fixing pin 24, the lifting ring 82 is rotated at this time to make the axial keyway 820 of the lifting ring 82 stagger the position of the radial fixing pin 24. At this time, the operator releases or loosens the lifting ring 82, and the lower surface of the lifting ring 82 will be tangent to the radial fixing pin 24, and the radial fixing pin 24 will support the lower surface of the lifting ring 82. At this time, the reference surface 801 of the reference adjustment mechanism 80 reaches the measurement position of the A section of the workpiece. It can also be said that the reference surface 801 of the reference adjustment mechanism 80 reaches the first height, and the inner spherical diameter at the A section of the workpiece can be measured at this time. When the lifting ring 82 is rotated to align the axial keyway 820 with the radial fixing pin 24, one end of the radial fixing pin 24 will enter the axial keyway 820, and the lifting ring 82 can move or slide downward, and the lower surface of the lifting ring 82 drops to the lowest position. At this time, the reference surface 801 of the reference adjustment mechanism 80 reaches the B-section measurement position of the workpiece. In other words, the reference surface 801 of the reference adjustment mechanism 80 reaches the second height, at which time the inner spherical diameter at the B-section of the workpiece can be measured.

[0081] In one embodiment of the present invention, Figure 5 As shown, the reference adjustment mechanism 80 also includes a pair of handles 85, which are symmetrically arranged on the outer peripheral surface of the lifting ring 82. One end of the handle 85 is inserted into the corresponding through hole 821 of the lifting ring 82 (see Fig.9A and Fig. 9B), the other end of the handle 85 extends radially outward to allow the operator to operate the lifting ring 82, for example, the lifting ring 82 can be moved up and down or rotated by holding the handle 85.

[0082] In one embodiment of the present invention, Figure 4 As shown, the measuring device 1 further includes a gasket 25 (e.g., an O-ring), which is sleeved on the outer circumferential surface of the main body 20 and contacts the upper surface of the base 10 (i.e., the upper surface of the plate 11), and is used to provide a lowest position support for the lifting ring 82. That is, when the lifting ring 82 is lowered to the lowest position (the reference surface 801 reaches the second height), the lower surface of the lifting ring 82 is not in direct contact with the upper surface of the base 10, but contacts with the gasket 25.

[0083] In addition, the measuring device 1 of one embodiment of the utility model further comprises a push rod limiting mechanism 9, such as Figure 3 As shown, the push rod limiting mechanism 9 includes a limiting rod 90, a hinge seat 91 and a manual button 92; wherein the hinge seat 91 is fixed to the lower surface of the base 10 (that is, the lower surface of the plate 11); the top of the manual button 92 is located on the upper surface of the base 10, and the bottom of the manual button 92 passes through a round hole and extends out of the lower surface of the base 10; the limiting rod 90 connects the hinge seat 91 and the manual button 92. Correspondingly, a transverse waist-shaped hole 32 (see FIG. 3 ) is provided near the bottom of the measuring push rod 30. Figure 3 , Figure 4 ), the limit rod 90 passes through the transverse waist-shaped hole 32 to connect the hinge seat 91 and the manual button 92. The vertical length of the transverse waist-shaped hole 32 determines the up and down movement amplitude of the measuring push rod 30. In addition, it should be noted that the function of the manual button 92 is: before placing the workpiece, press the top of the manual button 92, the limit rod 90 pulls the measuring push rod 30 downward, and under the action of the reset spring 43, the measuring head 50 retracts inward (that is, partially retracts to the end cover 40 in the direction of the measuring push rod 30), and at this time, it is convenient to place the workpiece on the reference surface 801. After the workpiece is placed, release the manual button 92, and under the action of the compression spring 31, the measuring push rod 30 moves upward and pushes the measuring head 50 outward until its end face 501 contacts the inner spherical surface 104 of the workpiece.

[0084] It can be seen from the above description that the device 1 for measuring the inner spherical diameter of an outer planet wheel provided in the embodiment of the utility model is easy to operate and can accurately and quickly measure the inner spherical diameters of different parts of a workpiece.

[0085] The following will introduce a method for measuring the inner spherical diameter of an outer planetary wheel according to an embodiment of the utility model.

[0086] The measuring method of an embodiment of the utility model uses the measuring device 1 as described above to measure the inner spherical diameter of the workpiece at the first part and the second part. In this embodiment, the first part can be Figure 1 The second part can be Figure 1 The position of the middle section B. Of course, it can also be set to other different section positions.

[0087] The measuring method of an embodiment of the utility model comprises the following steps:

[0088] Step 1: Adjust the reference surface 801 of the reference adjustment mechanism 80 to a first height, and prepare to measure the inner spherical diameter of the workpiece at the first position;

[0089] Step 2: Place the workpiece on the reference surface 801 with the inner spherical surface 104 of the workpiece facing the end cover 40 , and the measuring head 50 is aligned with the first part of the workpiece;

[0090] Step 3: Observe the meter 60 to obtain the measurement data of the workpiece at the first position; if the inner spherical diameter of the workpiece (such as the outer star wheel 100) at the first position meets the standard value, the inner spherical surface 104 of the workpiece at the first position contacts the end surface 501 of the measuring head 50, and the measurement data displayed by the meter 60 is the preset value; if the inner spherical diameter of the workpiece at the first position is smaller than the standard value, the inner spherical surface 104 of the workpiece will press the end surface 501 of the measuring head 50 inward, and the inclined surface 502 of the measuring head 50 pushes the conical surface 301 of the measuring push rod 30 and forces the measuring push rod 30 to move downward, and the measuring push rod 30 presses the first end 70 of the lever 70 downward. 1. The second end 702 of the lever 70 rises, and at this time, the inner spherical diameter at the first part is calculated based on the measurement data displayed on the meter 60; if the inner spherical diameter of the workpiece at the first part is greater than the standard value, the second end 702 of the lever 70 drops, and the first end 701 of the lever 70 rises and forces the measuring push rod 30 to move upward, and the conical surface 301 of the measuring push rod 30 pushes the inclined surface 502 of the measuring head 50 to slide in a direction away from the measuring push rod 30 until the end surface 501 of the measuring head 50 contacts the inner spherical surface 104 of the workpiece, and at this time, the inner spherical diameter at the first part is calculated based on the measurement data displayed on the meter 60;

[0091] Step 4: Adjust the reference surface 801 of the reference adjustment mechanism 80 to a second height, and then align the measuring head 50 with a second portion of the workpiece; wherein the second portion is different from the first portion;

[0092] Step 5: Observe the meter 60 to obtain the measurement data of the workpiece at the second position; wherein, if the diameter of the inner spherical surface of the workpiece at the second position meets the standard value, the inner spherical surface 104 of the workpiece at the second position contacts the end surface 501 of the measuring head 50, and the measurement data displayed on the meter 60 is the preset value; if the diameter of the inner spherical surface of the workpiece is smaller than the standard value, the inner spherical surface 104 of the workpiece will press the end surface 501 of the measuring head 50 inward, and the inclined surface 502 of the measuring head 50 pushes the conical surface 301 of the measuring push rod 30 and forces the measuring push rod 30 to move downward, and the measuring push rod 30 presses down the first end 701 of the lever 70, and the lever The second end 702 of the rod 70 rises, and at this time, the inner spherical diameter at the second position is calculated based on the measurement data displayed on the meter 60; if the inner spherical diameter of the workpiece is greater than the standard value, the second end 702 of the lever 70 drops, and the first end 701 of the lever 70 rises and forces the measuring push rod 30 to move upward, and the conical surface 301 of the measuring push rod 30 pushes the inclined surface 502 of the measuring head 50 to slide in the direction away from the measuring push rod 30 until the end face 501 of the measuring head 50 contacts the inner spherical surface 104 of the workpiece, and at this time, the inner spherical diameter at the second position is calculated based on the measurement data displayed on the meter 60.

[0093] It should be noted that the present application does not completely limit the order of the above steps. For example, the reference surface 801 of the reference adjustment mechanism 80 can be adjusted to the second height first, and then the inner spherical diameter of the second part of the workpiece can be measured; then the reference surface 801 of the reference adjustment mechanism 80 can be adjusted to the first height, and the inner spherical diameter of the first part can be measured. Therefore, the substantive content to be protected by the present application cannot be limited by the order of the above steps.

[0094] In addition, the standard value mentioned in the above steps is the standard value of the inner spherical diameter. The measurement data displayed on the meter 60 mentioned in the above steps three and five is a relative value, and then the actual value of the inner spherical diameter is obtained by calculation. The preset value mentioned in the above steps is also a relative value. For example, when the workpiece is a standard workpiece, the measurement data displayed on the meter 60 is the preset value. At this time, the preset value can be converted into the standard value of the inner spherical diameter according to the calculation method. For example, if the preset value is set to zero, then the corresponding standard value of the inner spherical diameter can be 10cm, and then the actual diameter size is calculated based on the standard value by adding or subtracting a certain size every time the dial indicator moves one grid.

[0095] In more detail, in the step of adjusting the reference surface 801 of the reference adjustment mechanism 80 to the first height (i.e., step one), the lifting ring 82 is lifted upward, the axial keyway 820 disengages from the radial fixing pin 24, and then the lifting ring 82 is rotated, the axial keyway 820 and the radial fixing pin 24 are offset, and the radial fixing pin 24 supports the lower surface of the lifting ring 82; at this time, the reference surface 801 is at the first height.

[0096] In more detail, in the step of adjusting the reference surface 801 of the reference adjustment mechanism 80 to the second height (i.e., step four), the lifting ring 82 is rotated to align the axial keyway 820 with the radial fixing pin 24, the radial fixing pin 24 enters the axial keyway 820, and the lifting ring 82 is moved downward until the reference surface 801 reaches the second height.

[0097] In more detail, in the step of placing the workpiece on the reference surface 801 (i.e., step 2), first press the manual button 92, then place the workpiece on the reference surface 801, with the inner spherical surface 104 of the workpiece facing the end cover 40, then release the manual button 92, the end face 501 of the measuring head 50 contacts the inner spherical surface 104 of the workpiece, and the measuring head 50 is aligned with the first part of the workpiece. More specifically, by pressing the top of the manual button 92, the limit rod 90 pulls the measuring push rod 30 downward, and under the action of the reset spring 43, the measuring head 50 retracts. At this time, it is convenient to place the workpiece on the reference surface 801. After the workpiece is placed, release the top of the manual button 92, and under the action of the compression spring 31, the measuring push rod 30 moves upward and pushes the measuring head 50 outward until its end face 501 contacts the inner spherical surface 104 of the workpiece.

[0098] In addition, the measuring device 1 provided in the embodiment of the present utility model further comprises a calibration block 900, such as Fig. 10A and Fig. 10B As shown, a pair of guide positioning grooves 901 are provided on the circumferential surface of the inner hole of the calibration block 900 for cooperating with the positioning pin 84 .

[0099] The measurement method provided by the embodiment of the utility model also includes a calibration step. Specifically, before measuring, a calibration block 900 is placed on the reference surface 801, and the inner hole of the calibration block 900 faces the end cover 40, and the positioning pin 84 is inserted into the guide positioning groove 901 of the calibration block 900. When the reference surface 801 is at the first height and the second height, the meter 60 is adjusted to zero. In other words, when the reference surface 801 is at the first height and the second height, it is necessary to make the measurement data displayed on the meter 60 all preset values, and the preset value is zero. Among them, the inner hole size of the calibration block 900 is set to the inner spherical diameter of the standard workpiece, so the accuracy of subsequent measurements can be improved by zeroing the meter with the calibration block.

[0100] In summary, the measuring method provided by the embodiment of the utility model can continuously measure the inner spherical diameters of two different parts of a workpiece. The measuring method and judgment method are simple, the detection speed is fast, and the detection personnel do not need to have high operating skills to complete the measurement work.

[0101] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0102] The technical solutions provided by the embodiments of the present invention are introduced in detail above. The principles and implementation methods of the present invention are explained in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A device for measuring the inner spherical diameter of an outer star wheel, used to measure at least the inner spherical diameter of a workpiece at a first position and a second position, characterized in that: It includes a base, a main body, a measuring push rod, an end cover, a measuring head, a meter, a lever, and a reference adjustment mechanism; The main body is arranged on the base; The measuring push rod is movably disposed in the main body, the measuring push rod has a top and a bottom, and the top has a conical surface; The end cover is fixed on the main body and covers the top of the measuring push rod, and the end cover is provided with a plurality of radial slots to accommodate the measuring head; The measuring head is slidably disposed in the radial slot, and the measuring head has an end face and an inclined surface; the end face faces outside the end cover and is used to contact the inner spherical surface of the workpiece during measurement; the inclined surface extends into the end cover and abuts against the conical surface of the measuring push rod; The meter is arranged on the base; The lever is arranged on the base, and has a first end and a second end, the first end is connected to the bottom of the measuring push rod, and the second end is connected to the meter; The reference adjustment mechanism has a reference surface for supporting the workpiece; the reference adjustment mechanism can be movably arranged on the main body up and down to adjust the height of the reference surface relative to the main body; the reference surface has at least a first height and a second height; when the reference surface is at the first height, the end face of the measuring head is aligned with the first part of the workpiece; when the reference surface is at the second height, the end face of the measuring head is aligned with the second part of the workpiece.

2. The device for measuring the inner spherical diameter of an outer planetary wheel according to claim 1, characterized in that: The reference adjustment mechanism includes a reference ring and a lifting ring, both of which surround the outer circumference of the main body and move up and down, wherein the lower surface of the reference ring contacts the upper surface of the lifting ring, and the upper surface of the reference ring is the reference surface.

3. The device for measuring the inner spherical diameter of the outer planetary wheel according to claim 2, characterized in that: The reference ring is provided with radial positioning holes; An axial groove is provided on the outer peripheral surface of the main body, and the axial groove corresponds to the radial positioning hole; A radial plug passes through the radial positioning hole and extends into the axial groove, so that the reference ring can move up and down relative to the main body and restricts the reference ring from rotating relative to the main body; The reference ring is also provided with two axial positioning holes for positioning pins to be vertically arranged therein. During measurement, the workpiece is positioned on the reference ring by the positioning pins.

4. The device for measuring the inner spherical diameter of an outer planetary wheel according to claim 2 or 3, characterized in that: At least one axial keyway is provided on the inner circumferential surface of the lifting ring; A radial pin hole is provided on the outer peripheral surface of the main body; A radial fixing pin is arranged in the radial pin hole, one end of the radial fixing pin extends out of the outer circumferential surface of the main body, and the other end of the radial fixing pin can selectively enter the axial keyway; when the axial keyway of the lifting ring is aligned with the radial fixing pin, the other end of the radial fixing pin enters the axial keyway, and the lifting ring can move up and down but cannot rotate relative to the main body; when the axial keyway of the lifting ring leaves the radial fixing pin, the lifting ring is rotated and supported by the radial fixing pin.

5. The device for measuring the inner spherical diameter of an outer planetary wheel according to claim 4, characterized in that: The measuring device also includes a gasket, which is sleeved on the outer circumference of the main body and contacts the upper surface of the base; when the lifting ring descends to the reference plane and reaches the second height, the lower surface of the lifting ring contacts the gasket.

6. The device for measuring the inner spherical diameter of an outer planetary wheel according to claim 1, characterized in that: The measuring device further comprises a push rod limiting mechanism, which comprises a limiting rod, a hinge seat and a manual button, wherein the hinge seat and the manual button are both fixed to the base; A transverse waist-shaped hole is arranged at the bottom of the measuring push rod, and the limiting rod passes through the transverse waist-shaped hole to connect the hinge seat and the manual button.

7. The device for measuring the inner spherical diameter of an outer planetary wheel according to claim 1, characterized in that: The end cover has an inner concave cavity for accommodating the top of the measuring push rod; the radial slide groove radially penetrates the outer peripheral surface of the end cover and the inner concave cavity; The end cover is also provided with an annular groove, which is located between the outer peripheral surface of the end cover and the inner concave cavity; a reset spring is arranged in the annular groove, and the reset spring passes through the spring receiving hole of the measuring head to force the inclined surface of the measuring head to always fit with the conical surface of the measuring push rod; The end cover is also provided with a threaded hole, and an adjusting screw is installed in the threaded hole and the lower end of the adjusting screw extends into the inner concave cavity of the end cover, so as to limit the upper limit of movement of the measuring push rod and control the maximum extension of the measuring head.

8. The device for measuring the inner spherical diameter of an outer planetary wheel according to claim 1, characterized in that: A stepped hole is provided on the main body, the top of the measuring push rod extends upward from the stepped hole, and the bottom extends downward and is located on the lower surface of the base; A rotating support is arranged on the lower surface of the base, and the lever is rotatably arranged on the base through the rotating support; The meter is connected to the second end of the lever via a transition rod.

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