Radial run-out detection device for II-level wandering star gear frame hole

Abstract

The invention relates to a device for detecting radial run-out of a II-level wandering star gear frame hole. The device comprises a positioning assembly and a measuring assembly, the positioning assembly comprises a base, and the base can be rotationally installed in a bearing hole of the lower frame in an automatic centering mode. The measuring assembly comprises a measuring head, a measuring head seat and a dial indicator which is vertically installed above the measuring head seat. The measuring head seat can be installed on the base in a vertically adjustable mode, the measuring head can be installed on the measuring head seat in a left-right transverse sliding mode, and the angle between the measuring head and a meter rod of the dial indicator is 90 degrees. The device can realize three-coordinate measurement of the coaxiality value of the two bearing mounting holes, is high in measurement precision and simple in structure, and can be used for measurement at any placement position of a product.

Description

Technical Field

[0001] The invention relates to the technical field of planetary gears, and in particular to a device for detecting radial runout of a frame hole of a class II planetary gear. Background Art

[0002] In the II-level planetary gear mechanism, the input axis and the output axis are in the same straight line, and two or more planetary gears are configured to share the load. Therefore, the planetary gear mechanism can reduce the size of the reducer, but the planetary gear mechanism has a complex structure and requires high processing accuracy.

[0003] When repairing the II-level planetary gear frame, the process requires measuring the coaxiality value of the two bearing mounting holes of the upper and lower frames (reference Figure 1 , Figure 3 As shown in the figure, since it is necessary to measure a circle of holes, it is impossible to use traditional lathe clamping measurement and deflection meter measurement. The three-coordinate measurement is difficult to carry due to the large size and heavy weight of the product, and there are many measurement positions, so the operation is very inconvenient and time-consuming.

[0004] Therefore, a level II planetary gear frame hole radial runout detection device is proposed, which can solve the problem that traditional coaxiality measurement methods cannot be achieved and three-coordinate measurement is difficult. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to solve the problem that traditional coaxiality measurement methods cannot be achieved and three-coordinate measurement is difficult. A Class II planetary gear frame hole radial runout detection device is proposed. The device can meet the measurement accuracy and can be measured at any position of the product without the need to move the product, thereby reducing the risk of accidents that may occur during product transportation and saving production costs.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A device for detecting radial runout of a hole of a level II planetary gear frame, wherein the level II planetary gear frame comprises an upper frame and a lower frame, wherein the upper frame and the lower frame are respectively provided with an upper frame bearing hole and a lower frame bearing hole, and the device comprises a positioning assembly and a measuring assembly; the positioning assembly comprises a base, and the base can be rotatably installed in the bearing hole of the lower frame in an automatically centering manner; the measuring assembly comprises a probe, a probe seat, and a dial indicator vertically installed above the probe seat; the probe seat can be adjusted up and down and installed on the base, and the probe can be slid laterally left and right on the probe seat, the probe and the dial indicator rod form an angle of 90°, and a displacement transmission member is also rotatably installed on the probe seat, and the rotation plane of the displacement transmission member is a vertical plane; the displacement transmission member has an upper surface and a lower surface which form an angle with each other, the bottom end of the dial indicator rod is in contact with its upper surface, the inner end of the probe is in contact with its lower surface, and the outer end of the probe protrudes laterally out of the probe seat;

[0008] When the probe moves horizontally and pushes the displacement transmission member to rotate, the upper surface of the displacement transmission member can simultaneously squeeze the dial indicator rod and make it move vertically, so that the displacement transmission member can transmit the lateral displacement of the probe to the dial indicator rod in a 1:1 ratio.

[0009] In a preferred embodiment of the present scheme, the displacement transmission member is a fan-shaped lever, which is hinged on the probe base, the bottom end of the dial indicator rod contacts the upper surface of the fan-shaped lever, and the inner end of the probe contacts the lower surface of the fan-shaped lever.

[0010] In a preferred embodiment of the present solution, the measuring assembly further comprises an adjusting plate, which is mounted on the base so as to be adjustable up and down, and the probe seat is fixedly mounted on one side of the adjusting plate.

[0011] In a preferred embodiment of the present invention, the base is further provided with an adjustment cylinder, the adjustment cylinder is provided with an external thread, and the adjustment plate is screwed onto the adjustment cylinder; the adjustment cylinder is also provided with a compression spring, and the compression spring abuts between the adjustment plate and the upper surface of the base. The coaxiality measurement of different cross sections can be achieved by changing the compression distance and pressure of the compression spring.

[0012] In a preferred embodiment of the present scheme, the inner wall of the vertical cylinder is provided with a downward abutment step, and a pressure spring and a push rod are provided in the vertical cylinder; a rod shoulder is provided in the middle of the push rod, and the pressure spring is sleeved on the push rod and abuts between the abutment step and the rod shoulder; the dial indicator is installed on the top of the vertical cylinder through a dial clamp nut, and the dial indicator rod is inserted into the vertical cylinder from the top of the vertical cylinder downward and abuts against the top of the push rod; the bottom of the push rod abuts against the upper surface of the fan-shaped lever.

[0013] In a preferred embodiment of this scheme, an adjustment cylinder is provided in the middle of the base; a cavity is formed in the adjustment cylinder, and the cavity extends to the inside of the base; the positioning assembly also includes multiple positioning ejector pins, and multiple transverse through holes are opened on the surrounding walls of the base corresponding to the multiple positioning ejector pins, and the multiple positioning ejector pins are transversely passed through the transverse through holes; a conical mandrel is also screwed in the adjustment cylinder, and the bottom of the conical mandrel is in the shape of an inverted cone or an inverted truncated cone. When the bottom of the adjustment cylinder moves downward to the positioning ejector pin, the bottom of the conical mandrel can simultaneously eject multiple positioning ejector pins outward. Thus, the automatic centering of the base can be achieved.

[0014] In a preferred embodiment of the present scheme, the top of the base is also provided with a plurality of vertical holes corresponding to the positioning push rod, and a vertical through hole is provided in the middle of the positioning push rod; the positioning assembly also includes a plurality of limit pins, and the limit pins can be inserted into the vertical through holes in the middle of the positioning push rod through the vertical holes; when the bottom end of the conical core shaft is not screwed into the interior of the base, the positioning push rod can slide left and right for a certain distance under the limit of the limit pin.

[0015] In a preferred embodiment of the present invention, the inner end of the positioning push rod is provided with an inclined surface adapted to the bottom of the conical mandrel, and the outer end of the positioning push rod is spherical. The inclined surface design of the inner end can facilitate the conical mandrel to stably push the positioning push rod, and the spherical shape of the outer end can facilitate reducing the resistance during the rotation process, and the structural design is simple and reasonable.

[0016] In a preferred embodiment of the present solution, a locking nut is also threaded onto the upper portion of the conical mandrel.

[0017] In a preferred embodiment of the present scheme, an annular boss protrudes downward from the bottom of the base, a deep groove ball bearing is sleeved on the outside of the annular boss, and the outer ring of the deep groove ball bearing is supported on the bottom end face of the bearing hole of the lower frame to limit the axial movement of the positioning assembly.

[0018] The beneficial effects of the present invention are:

[0019] The radial runout detection device of the second-level planetary gear frame hole of the present scheme includes a measuring component and a positioning component. The measuring component is composed of a dial indicator, a dial clamp nut, a dial rod, an adjustment plate, a compression spring, a probe, a fan-shaped lever, a pressure spring, a push rod, and a probe seat; the fan-shaped lever drives the probe and the push rod to make linear motion due to gravity, and because the probe and the push rod form an angle of 90 degrees, the movement of the probe and the push rod is equal. Under the action of the pressure spring, the push rod can keep its movement in a stable state, so that the radial movement of the probe can be stably displayed on the dial indicator, thereby realizing the coaxiality measurement of a single section;

[0020] The positioning assembly consists of a base, a deep groove ball bearing, a positioning ejector rod, a limit pin, a tapered mandrel, a locking nut, and a handle; the outer ring of the deep groove ball bearing is supported on the lower end surface of the bearing hole of the lower frame, limiting the axial movement of the positioning assembly; the limit pin connects the positioning ejector rod to the base, and ensures that the positioning ejector rod moves in a straight line under the action of the tapered mandrel; there are at least three positioning ejector rods, which are evenly distributed around the base. According to the principle of three points determining a circle, the equidistant linear movement of multiple positioning ejector rods is ensured under the action of the tapered surface of the tapered mandrel, thereby realizing automatic centering of the positioning assembly;

[0021] therefore:

[0022] (1) The device of this solution is easy to operate and can solve the problem that the traditional coaxiality measurement method cannot achieve and the difficulty of three-coordinate measurement. The device has a simple and compact structure and can be measured at any position of the product without moving the product, which reduces the risk of accidents that may occur during product transportation and saves production costs.

[0023] (2) This device uses the principle of converting the rotational motion of a 90° fan-shaped lever into the equivalent linear motion of two right-angled parts to achieve coaxiality measurement of narrow holes;

[0024] (3) This device uses a conical mandrel to achieve automatic centering of the three positioning pins, ensuring that the measuring hole is rotated along the reference axis for measurement. It is easy to operate and has high measurement accuracy, and can be widely used in the measurement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a front view of the present invention;

[0027] Figure 3 It is a schematic diagram of the use state of the present invention;

[0028] Figure 4 It is a schematic diagram of a structural stereogram of the present invention;

[0029] Figure 5 It is a schematic diagram of the outer end of the probe of the present invention. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0031] like Figures 1 to 5 As shown, a radial runout detection device for a Class II planetary gear frame hole is used to measure the coaxiality between an upper frame bearing hole a and a lower frame bearing hole b of a Class II planetary gear frame; the device includes a positioning component and a measuring component.

[0032] Specifically, in this embodiment, the positioning assembly includes a base 4, which can be automatically centered and rotatably installed in the bearing hole b of the lower frame; the measuring assembly includes a probe 11 and a probe seat 15, which is installed on the base 4, and the probe 11 can be installed on the probe seat 15 so as to slide horizontally left and right. The probe seat 15 is also vertically installed with a dial indicator 1, and the probe 11 and the dial indicator 1 The table rod 9 is at a 90° angle, and a displacement transmission member is also rotatably installed on the probe seat 15, and the displacement transmission member has an upper surface and a lower surface that are angled to each other. The bottom end of the dial gauge 1's stem 9 contacts its upper surface, the inner end of the probe 11 contacts its lower surface, and the outer end of the probe 11 protrudes laterally from the probe seat 15; because the probe 11 and the push rod 14 form a 90° angle, the movement of the probe 11 and the push rod 14 are equal, and the push rod 14 can maintain a stable movement under the action of the pressure spring 13, so that the radial movement of the probe 11 can be stably displayed on the dial gauge 1, so that this scheme can realize the coaxiality measurement of a single cross section of a horizontal plane. .

[0033] Furthermore, in this solution, the probe holder 15 can be installed on the base 4 in an adjustable manner up and down. By changing the up and down position of the probe holder 15, the measuring section can be changed, and the previous operation can be repeated to complete the coaxiality measurement of multiple sections.

[0034] Specifically, in this embodiment, the measuring assembly further includes an adjusting plate 3 , which is mounted on the base 4 in an adjustable manner up and down, and a probe seat 15 is fixedly mounted on one side of the adjusting plate 3 .

[0035] Furthermore, in this embodiment, the displacement transmission member is a fan-shaped lever 12, which is hinged on the probe base 15, the bottom end of the dial indicator 1's stem 9 contacts the upper surface of the fan-shaped lever 12, and the inner end of the probe 11 contacts the lower surface of the fan-shaped lever 12.

[0036] Furthermore, in the present scheme, a vertical tube 18 is also provided on the probe seat 15, and the pressure spring 13 and the push rod 14 are both arranged in the vertical tube 18; a rod shoulder is provided in the middle of the push rod 14, and the pressure spring 13 is sleeved on the push rod 14 and abuts between the abutting step and the rod shoulder; the dial indicator 1 is installed on the top of the vertical tube 18 through the clamp nut 2, and the rod 9 of the dial indicator 1 is inserted into the vertical tube 18 from the top of the vertical tube 18 and abuts against the top of the push rod 14; the bottom of the push rod 14 abuts against the upper surface of the fan-shaped lever 12.

[0037] In order to achieve the up and down adjustment of the probe seat 15, in this embodiment, an adjusting cylinder 19 is also provided on the base 4, the adjusting cylinder 19 is provided with an external thread, and the adjusting plate 3 is screwed on the adjusting cylinder 19; the adjusting cylinder 19 is also provided with a compression spring 10, and the compression spring 10 abuts between the adjusting plate 3 and the upper surface of the base 4; the rotating adjusting plate 3 drives the measuring component to move along the axial direction of the hole, so that the probe 11 is at different cross-sectional positions, and the coaxiality measurement of different cross-sections can be realized.

[0038] Further preferably, in the present solution, the positioning assembly is composed of a base 4 , a deep groove ball bearing 16 , a positioning push rod 5 , a limit pin 17 , a tapered core shaft 6 , a locking nut 7 , and a handle 8 .

[0039] refer to Figure 1 As shown, in this embodiment, an adjusting cylinder 19 is provided in the middle of the base 4, a cavity is formed in the adjusting cylinder 19, and the cavity extends downward to the inside of the base 4; transverse through holes are opened on the surrounding walls of the base 4 corresponding to the positioning push rod 5, and the positioning push rod 5 passes horizontally through the transverse through holes; the conical core shaft 6 is screwed in the adjusting cylinder 19, and the bottom of the conical core shaft 6 is in the shape of an inverted truncated cone.

[0040] The outer ring of the deep groove ball bearing 16 is supported on the lower end surface of the bearing hole b of the lower frame, which limits the axial movement of the positioning assembly. The limit pin 17 connects the positioning push rod 5 to the base and ensures that the positioning push rod 5 moves in a straight line under the action of the tapered core shaft 6. The positioning push rod 5 has three parts. According to the principle of three points determining a circle, the equidistant linear movement of the three positioning push rods 5 is guaranteed under the action of the tapered surface of the tapered core shaft 6, thereby realizing the automatic centering of the positioning assembly.

[0041] To ensure that the positioning push rod 5 moves in a straight line under the action of the conical mandrel 6, for details, refer to Figure 1 , Figure 4 As shown, in this embodiment, three vertical holes are opened on the top of the base 4, the cross-section of the vertical holes is a rectangle, the width of the rectangle is adapted to the diameter of the limit pin 17, and a vertical through hole is opened in the middle of the positioning push rod 5; the limit pin 17 can be inserted into the vertical through hole in the middle of the positioning push rod 5 through the vertical hole, so that the positioning push rod 5 can slide linearly for a distance under the limitation of the limit pin 17.

[0042] Further preferably, in this embodiment, the inner end of the positioning push rod 5 is provided with an inclined surface matched with the bottom of the conical core shaft 6, and the outer end of the positioning push rod 5 is spherical.

[0043] In this embodiment, a locking nut 7 is threadedly mounted on the upper portion of the conical core shaft 6 .

[0044] like Figure 1 , Figure 3 As shown, loosen the locking nut 7, pull the handle 8 to rotate the conical mandrel 6 counterclockwise, so that the positioning push rod 5 can be extended into the base 4, and the device assembly is placed in the lower frame of the II-level planetary gear. Pull the handle 8 to rotate the conical mandrel 6 clockwise to make the positioning push rod 5 extend and contact the bearing hole b of the lower frame, tighten the locking nut 7 to ensure that the positioning push rod 5 can be stabilized in the bearing hole b of the lower frame, and complete the fixation of the measurement reference hole. Loosen the clamp nut 2, install the dial indicator 1 into the detection device, tighten the clamp nut 2 when the dial indicator 1 displays a half-turn compression, fix the dial indicator 1, operate the handle 8 to rotate the detection device for one circle, and read the change value of the dial indicator 1, which is the coaxiality value of a section. Rotate the adjustment plate 3 to change the measurement section, and repeat the previous operation to complete the coaxiality measurement of multiple sections.

[0045] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A device for detecting radial runout of a II-level planetary gear frame hole, wherein the II-level planetary gear frame comprises an upper frame and a lower frame, wherein the upper frame and the lower frame are respectively provided with an upper frame bearing hole (a) and a lower frame bearing hole (b), and the device is characterized in that: The device comprises a positioning component and a measuring component; The positioning assembly comprises a base (4), and the base (4) can be rotatably installed in the bearing hole (b) of the lower frame in an automatically centering manner; The measuring assembly comprises a probe (11), a probe base (15), and a dial indicator (1) vertically mounted above the probe base (15); The probe seat (15) is mounted on the base (4) so ​​as to be adjustable up and down, and the probe (11) is mounted on the probe seat (15) so as to be slidable horizontally left and right, the probe (11) and the dial indicator (1) are at an angle of 90°, and a displacement transmission member is also rotatably mounted on the probe seat (15), and the rotation plane of the displacement transmission member is a vertical plane; The displacement transmission member has an upper surface and a lower surface which are angled with each other, the bottom end of the dial gauge (1) rod (9) contacts the upper surface, the inner end of the probe (11) contacts the lower surface, and the outer end of the probe (11) protrudes laterally from the probe seat (15); When the measuring head (11) moves laterally and pushes the displacement transmission member to rotate, the upper surface of the displacement transmission member can synchronously squeeze the dial indicator (1) rod (9) and make it move vertically.

2. The device for detecting radial runout of a Class II planetary gear frame hole according to claim 1, characterized in that: The displacement transmission member is a fan-shaped lever (12), which is hinged on a probe base (15), the bottom end of a dial indicator rod (9) contacts the upper surface of the fan-shaped lever (12), and the inner side end of the probe (11) contacts the lower surface of the fan-shaped lever (12).

3. The device for detecting radial runout of a Class II planetary gear frame hole according to claim 2, characterized in that: The measuring assembly further comprises an adjusting plate (3), the adjusting plate (3) being mounted on the base (4) in an adjustable manner up and down, and a probe seat (15) being fixedly mounted on one side of the adjusting plate (3).

4. The device for detecting radial runout of a Class II planetary gear frame hole according to claim 3, characterized in that: The base (4) is also provided with an adjustment tube (19), the adjustment tube (19) is provided with an external thread, and the adjustment plate (3) is screwed onto the adjustment tube (19); A compression spring (10) is also mounted on the adjustment cylinder (19), and the compression spring (10) abuts between the adjustment plate (3) and the upper surface of the base (4).

5. The device for detecting radial runout of a Class II planetary gear frame hole according to claim 4, characterized in that: The inner wall of the vertical tube (18) is provided with a downward abutting step, and a pressure spring (13) and a push rod (14) are provided inside the vertical tube (18); A rod shoulder is provided in the middle of the push rod (14), and the pressure spring (13) is sleeved on the push rod (14) and abuts between the abutting step and the rod shoulder; The dial gauge (1) is mounted on the top of the vertical tube (18) through a gauge clamp nut (2); a gauge rod (9) of the dial gauge (1) penetrates downward from the top of the vertical tube (18) into the vertical tube (18) and contacts the top of the push rod (14); The bottom of the push rod (14) abuts against the upper surface of the fan-shaped lever (12).

6. The device for detecting radial runout of a Class II planetary gear frame hole according to any one of claims 1 to 5, characterized in that: An adjustment cylinder (19) is provided in the middle of the base (4); A cavity is formed in the adjusting cylinder (19), and the cavity extends to the inside of the base (4); The positioning assembly further comprises a plurality of positioning push rods (5), a plurality of transverse through holes are formed on the surrounding walls of the base (4) corresponding to the plurality of positioning push rods (5), and the plurality of positioning push rods (5) are transversely passed through the transverse through holes; A conical mandrel (6) is screwed into the adjusting cylinder (19), and the bottom of the conical mandrel (6) is in the shape of an inverted cone or an inverted truncated cone. When the bottom of the adjusting cylinder (19) moves downward to the positioning ejector rod (5), the bottom of the conical mandrel (6) can simultaneously eject a plurality of positioning ejector rods (5) outward.

7. The device for detecting radial runout of a Class II planetary gear frame hole according to claim 6, characterized in that: The top of the base (4) is also provided with a plurality of vertical holes corresponding to the positioning top rod (5), and the middle of the positioning top rod (5) is provided with a vertical through hole; The positioning assembly further comprises a plurality of limit pins (17), and the limit pins (17) can be inserted into the vertical through holes in the middle of the positioning push rod (5) through the vertical holes; When the bottom end of the conical mandrel (6) is not screwed into the interior of the base (4), the positioning push rod (5) can slide left and right for a certain distance under the limitation of the limiting pin (17).

8. The device for detecting radial runout of a Class II planetary gear frame hole according to claim 7, characterized in that: The inner end of the positioning push rod (5) is provided with an inclined surface matched with the bottom of the conical core shaft (6), and the outer end of the positioning push rod (5) is spherical.

9. The device for detecting radial runout of a Class II planetary gear frame hole according to claim 7, characterized in that: A locking nut (7) is also threadedly mounted on the upper portion of the conical core shaft (6).

10. The device for detecting radial runout of a Class II planetary gear frame hole according to claim 6, characterized in that: The bottom of the base (4) is provided with an annular boss protruding downward, and a deep groove ball bearing (16) is sleeved on the outside of the annular boss. The outer ring of the deep groove ball bearing (16) is supported on the bottom end surface of the lower frame bearing hole (b) to limit the axial movement of the positioning component.

Images