Automatic brake drum dynamic balance detection equipment

Abstract

The invention discloses automatic brake drum dynamic balance detection equipment, which belongs to the technical field of dynamic balance detection, and is characterized in that through arrangement of a pushing mechanism and a locking mechanism, when the thickness of the inner wall of a brake drum body is changed due to deformation, part of clamps cannot abut against the inner wall of the brake drum body under the condition of moving for the same distance; after the electric control push rod extends, the electric control push rod can drive the sliding table to move through the threaded sleeve rod until the sliding table drives the clamp to abut against the inner wall of the deformed brake drum body, and when the clamp can move for the second time, it can be judged that the thickness of the inner wall of the brake drum body changes due to deformation; and dynamic balance cannot be realized by purely adding the balance block, so that potential safety hazards caused by misjudgment of defects are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamic balance detection, and particularly to an automatic brake drum dynamic balance detection device. Background Art

[0002] The brake drum is a friction component of the drum brake. The outer shape of the brake drum is usually cylindrical. It is fixed on the tire and rotates at the same speed as the tire. When braking is required, the oil pressure pushes the brake shoe to contact the inner edge of the brake drum, and the friction force generated by the contact inhibits the rotation of the tire, thereby achieving the braking purpose. To ensure the dynamic balance of the brake drum, the wheels and the braking system should be regularly inspected and maintained to promptly discover and solve potential problems. The dynamic balance detection of the brake drum requires the use of a special detection instrument for measuring dynamic balance, which detects the vibration and unbalance amount of the brake drum during rotation through sensors and a data processing system, thereby helping technicians determine whether adjustment is needed. During the actual operation process, if the thickness of the inner and outer walls of the brake drum undergoes significant deformation, this deformation will also cause unbalance during rotation, which is thus captured by the dynamic balance detector. Since it does not have the function of detecting the change in the thickness of the inner and outer walls, in this case, the dynamic balance detector shows an unbalanced result, which easily leads technicians to make incorrect judgments about the defects of the brake drum. Workers may achieve dynamic balance by adding balance weights at symmetric positions of the unstable points. Since adding balance weights will change the mass distribution of the brake drum, an additional moment will be generated. Therefore, after this moment offsets or reduces the original unbalanced moment caused by uneven mass distribution, it is easy to pass the dynamic balance detection during the secondary detection, thus ignoring the problem of the change in the brake drum wall thickness and leaving a safety hazard. Summary of the Invention

[0003] The purpose of the present invention is to propose an automatic brake drum dynamic balance detection device to solve the problem that the existing dynamic balance detection device does not have the function of detecting the change in the thickness of the inner and outer walls, which easily leads technicians to make incorrect judgments about the defects of the brake drum.

[0004] To achieve the above purpose, the present invention adopts the following technical solution: an automatic brake drum dynamic balance detection device It includes a power source, a placement rack installed on the power source, and a brake drum body. A rotating mechanism connected to the output end of the power source is arranged inside the placement rack. The rotating mechanism includes a rotating disk driven by the power source to rotate, and a clamping mechanism is installed on the rotating disk. The clamping mechanism includes a housing installed on the rotating disk. A fixture is arranged on the housing, and a liftable movable rod is arranged at the bottom of the fixture. A positioning disk is provided in the middle of multiple said shells. A positioning groove for inserting the movable rod is provided on the surface of the positioning disk. When the rotating disk rotates, the clamp moves horizontally along the center line until it fits against the inner wall of the brake drum body. After the movable rod is removed from the positioning groove by lifting, the clamp can still be moved by a pushing mechanism. The pushing mechanism includes an electric control push rod installed in the shell, and the electric control push rod pushes the clamp to continue moving to fit against the deformed position of the brake drum body.

[0005] As a further description of an automatic brake drum dynamic balance detection device of the above technology: The rotating mechanism further includes a rotating cavity installed on the placement rack. The rotating disk is rotatably arranged inside the rotating cavity. A mounting shaft passing through the middle of the rotating disk is installed in the middle of the rotating cavity, and the positioning disk is fixedly installed on the mounting shaft. A transmission rod is installed at the output end of the power source, and the transmission rod meshes with the rotating disk. When the power source rotates, the transmission rod drives the rotating disk to rotate around the mounting shaft as the axis.

[0006] As a further description of an automatic brake drum dynamic balance detection device of the above technology: The shell further includes a slide rail installed in the accommodation cavity and a slide table slidably embedded on the slide rail. A straight groove for the positioning rod to move is provided in the middle of the slide rail. The clamp and the positioning rod are respectively installed at the top and bottom of the slide table. The movable rod is movably sleeved on the surface of the positioning rod and is lifted and lowered by an adjustment mechanism.

[0007] As a further description of an automatic brake drum dynamic balance detection device of the above technology: The adjustment mechanism includes a rotating shaft rotatably installed on the positioning rod and a limiting shaft installed on the movable rod. An eccentric wheel is installed on the rotating shaft and a connecting rod is sleeved and installed on the limiting shaft. The connecting rod and the eccentric wheel are rotatably connected by a hinge shaft. When the eccentric wheel rotates, it pushes and pulls the connecting rod to drive the movable rod to lift and lower.

[0008] As a further description of an automatic brake drum dynamic balance detection device of the above technology: The pushing mechanism further includes a mounting seat provided at the end of the accommodation cavity. The outer side surface of the mounting seat is arc-shaped and has the same radian as the outer wall of the shell. A threaded sleeve rod is installed on the mounting seat, and a thread meshing with the threaded sleeve rod is provided in the middle of the slide table.

[0009] As a further description of an automatic brake drum dynamic balance detection device of the above technology: The end of the output end of the electric control push rod is installed with a measuring piece passing through the mounting seat, and a scale is engraved on the surface of the measuring piece.

[0010] Further description of an automated brake drum balance detection device of the above technology: A locking mechanism meshing with the threaded sleeve rod is arranged inside the sliding table. The locking mechanism includes a rotating groove opened in the middle of the sliding table. A collar is rotatably arranged in the rotating groove. The collar includes an internal threaded ring with threads meshing with the measuring part on the inner wall. The internal threaded ring is rotatably embedded in the rotating groove through a fitting ring arranged on the outer edge.

[0011] Further description of an automated brake drum balance detection device of the above technology: An inner cavity is opened inside the positioning rod, and a pushing part is rotatably arranged in the middle of the inner cavity. An avoidance cavity is opened at the joint of the positioning rod and the rotating groove, and a lifting rod penetrates through the middle. Limit racks meshing with the teeth and abutting parts abutting against the pushing part are respectively installed at the upper and lower ends of the lifting rod.

[0012] Further description of an automated brake drum balance detection device of the above technology: A through hole is opened in the middle of the pushing part, and a rotating shaft penetrates through the middle of the through hole. When the rotating shaft rotates and pulls the movable rod to lift to release the connection with the positioning disk, the pushing part rotates with the rotating shaft and pushes the abutting part to rise. The abutting part pushes the limit rack to rise through the lifting rod. After the limit rack reaches the highest point, it meshes with the teeth.

[0013] Further description of an automated brake drum balance detection device of the above technology: A driving motor is also installed on the positioning rod. The end of the rotating shaft close to the driving motor is connected to the output end of the driving motor.

[0014] In summary, due to adopting the above technology of an automated brake drum balance detection device, the beneficial effects of the present invention are as follows: 1. Through the arranged rotating mechanism and clamping mechanism, when it is necessary to detect the brake drum body, place the brake drum body centered on the mounting shaft on the round table composed of multiple shells. Preferably, the number of shells is [X], and then start the power source at this time. The power source drives the transmission rod to rotate and transmits the torque to the rotating disk, so that the rotating disk can drive the shell to rotate under the limitation of the rotating cavity; since the positioning disk is fixedly arranged and the movable rod is inserted into the positioning groove at this time, during the rotation of the shell, the movable rod will contact the positioning groove and move under the pushing of the inner wall of the positioning groove. The movable rod drives the sliding table to move under the guidance of the slide rail through the positioning rod. The sliding table can drive the fixture to move and fit on the inner wall of the brake drum body. When the wall thickness of the brake drum body does not change due to deformation, all the fixtures are closely attached to the inner wall of the brake drum body until the fixture cannot move and the rotating disk and the shell cannot continue to rotate, and the brake drum body is fixed, and the power source stops rotating temporarily; 2. Through the provided adjusting mechanism, the rotation restriction of the rotating disk by the positioning disk is released by the adjusting mechanism. As shown in the figures, the adjusting mechanism includes a rotating shaft rotatably mounted on the positioning rod and a limiting shaft mounted on the movable rod. An eccentric wheel is mounted on the rotating shaft and a connecting rod is sleeved and mounted on the limiting shaft. The connecting rod and the eccentric wheel are rotatably connected by a hinge shaft. When the eccentric wheel rotates, it pushes and pulls the connecting rod to drive the movable rod to move up and down; by rotating the rotating shaft, the rotating shaft drives the hinge shaft to rotate around the rotating shaft through the eccentric wheel. During the rotation of the hinge shaft, the rotating shaft is pushed and pulled by the connecting rod, so that the rotating shaft can drive the movable rod to move up and down on the surface of the positioning rod. After the movable rod is removed from the positioning groove, the limiting contact is released, and the positioning disk no longer restricts the rotation of the rotating disk. At this time, when the power source is started again, the dynamic balance test can be carried out.

[0015] 3. Through the provided pushing mechanism and locking mechanism, when the thickness of the inner wall of the brake drum changes due to deformation, some clamps cannot abut against the inner wall of the brake drum when moving the same distance. At this time, it is necessary to remove the movable rod from the positioning groove; the pusher rotates and abuts against the abutting member and pushes the lifting rod to rise, and the limiting rack is pushed out and contacts and meshes with the teeth. At this time, under the restriction of the limiting rack and the teeth, the inner threaded ring cannot rotate in the rotating groove. At this time, the electric control push rod is started, so that the output end of the electric control push rod extends. Since the threaded sleeve rod meshes with the inner threaded ring and the inner threaded ring cannot rotate, the threaded sleeve rod and the inner threaded ring are in a mutually locked state at this time. After the electric control push rod extends, it can drive the sliding table to move through the threaded sleeve rod until the sliding table drives the clamp to abut against the inner wall of the deformed brake drum. When the clamp can move secondarily, it can be judged that the inner wall thickness of the brake drum body has changed due to deformation, and the method of simply adding balance weights cannot be used to achieve dynamic balance, avoiding the potential safety hazards caused by misjudgment defects. Description of the Drawings

[0016] Figure 1 Shows a three-dimensional structural schematic diagram of an automatic brake drum dynamic balance detection device; Figure 2 Shows a top view sectional structural schematic diagram of the rotating mechanism; Figure 3 Shows a three-dimensional structural schematic diagram of the clamping mechanism; Figure 4 Shows a partial three-dimensional structural schematic diagram of the clamping mechanism; Figure 5 Shows a top view sectional structural schematic diagram of the clamping mechanism; Figure 6 Shows a partial three-dimensional sectional structural schematic diagram of the clamping mechanism and the pushing mechanism; Figure 7 Shows a front view sectional structural schematic diagram of the clamping mechanism and the pushing mechanism; Figure 8 shows Figure 7 the enlarged structural schematic diagram at position A in Figure 9 the partial three-dimensional structural schematic diagram of the adjusting mechanism on the clamping mechanism; Figure 10 the three-dimensional sectional structural schematic diagram of the sliding table and the positioning rod; Figure 11 the three-dimensional structural schematic diagram of the measuring member in the ejected state; Figure 12 the three-dimensional disassembled structural schematic diagram of the electric control push rod, the measuring member and the threaded sleeve rod; Figure 13 the front sectional structural schematic diagram of the locking mechanism; Figure 14 shows Figure 13 the enlarged structural schematic diagram at position B in Figure 15 the three-dimensional structural schematic diagram of the collar.

[0017] Legend description: 10. Power source; 20. Placing rack; 30. Brake drum body; 40. Rotating mechanism; 41. Rotating cavity; 42. Rotating disk; 43. Transmission rod; 44. Mounting shaft; 50. Clamping mechanism; 51. Positioning disk; 511. Positioning groove; 52. Housing; 521. Accommodating cavity; 522. Slide rail; 523. Sliding table; 53. Fixture; 54. Positioning rod; 541. Inner cavity; 55. Movable rod; 60. Pushing mechanism; 61. Electric control push rod; 62. Threaded sleeve rod; 63. Mounting seat; 64. Measuring member; 70. Adjusting mechanism; 71. Limit shaft; 72. Link rod; 73. Hinge shaft; 74. Eccentric wheel; 75. Rotating shaft; 80. Locking mechanism; 81. Rotating groove; 82. Collar; 821. Internal thread ring; 822. Fitting ring; 823. Teeth; 83. Pushing member; 84. Abutting member; 85. Lifting rod; 86. Limit rack; 87. Avoiding contact cavity; 90. Driving motor. Detailed implementation manners

[0018] Next, the technical solution of an automatic brake drum dynamic balance detection device in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In order to solve the problem that existing dynamic balance detection devices do not have the function of detecting the thickness change of the inner and outer walls, which easily leads to wrong judgments by technicians on the defects of brake drums, the present invention proposes an automated brake drum dynamic balance detection device, as Figure 1 - Figure 14 shown: It includes a power source 10, a placement rack 20 installed on the power source 10, and a brake drum body 30. A rotating mechanism 40 connected to the output end of the power source 10 is arranged inside the placement rack 20, as Figure 2 shown. The rotating mechanism 40 includes a rotating disk 42 driven by the power source 10 to rotate. The rotating mechanism 40 further includes a rotating cavity 41 installed on the placement rack 20. The rotating disk 42 is rotatably arranged inside the rotating cavity 41. A mounting shaft 44 passing through the middle of the rotating disk 42 is installed in the middle of the rotating cavity 41. A positioning disk 51 is fixedly installed on the mounting shaft 44; A transmission rod 43 is installed at the output end of the power source 10, and the transmission rod 43 is meshed with the rotating disk 42. When the power source 10 rotates, the transmission rod 43 drives the rotating disk 42 to rotate around the mounting shaft 44; A clamping mechanism 50 is installed on the rotating disk 42, as Figure 3 and Figure 4 shown. The clamping mechanism 50 includes a housing 52 installed on the rotating disk 42. A plurality of housings 52 are combined into a frustum for placing the brake drum body 30. A fixture 53 is arranged on the housing 52, and a liftable movable rod 55 is arranged at the bottom of the fixture 53; A positioning disk 51 is arranged in the middle of a plurality of housings 52, as Figure 5 shown. A positioning groove 511 for inserting the movable rod 55 is opened on the surface of the positioning disk 51. When the rotating disk 42 rotates, the positioning groove 511 pushes the movable rod 55 to move and drives a plurality of fixtures 53 to synchronously move horizontally along the center line of the frustum until they fit against the inner wall of the brake drum body 30; The housing 52 further includes a slide rail 522 installed in the accommodation cavity 521 and a slide table 523 slidably embedded on the slide rail 522, as Figure 6 shown. A straight groove for the positioning rod 54 to move is opened in the middle of the slide rail 522; The fixture 53 and the positioning rod 54 are respectively installed at the top and bottom of the slide table 523. The movable rod 55 is movably sleeved on the surface of the positioning rod 54 and is lifted and lowered by an adjusting mechanism 70; When it is necessary to detect the brake drum body 30, the brake drum body 30 is placed on the frustum composed of a plurality of housings 52 with the mounting shaft 44 as the center. Preferably, the number of housings 52 is 8. At this time, the power source 10 is started again, so that the power source 10 drives the transmission rod 43 to rotate and transmits the torque to the rotating disk 42, so that the rotating disk 42 can drive 8 housings 52 to rotate under the limitation of the rotating cavity 41; Since the positioning disk 51 is fixedly arranged and the movable rod 55 is inserted into the positioning groove 511 at this time, during the rotation of the housing 52, the movable rod 55 will contact the positioning groove 511 and move under the push of the inner wall of the positioning groove 511. The movable rod 55 drives the slide 523 to move under the guidance of the slide rail 522 through the positioning rod 54. The slide 523 can drive the fixture 53 to move and fit against the inner wall of the brake drum body 30. When the wall thickness of the brake drum body 30 has not changed due to deformation, all the fixtures 53 are in close contact with the inner wall of the brake drum body 30 until the fixture 53 cannot move, the rotating disk 42 and the housing 52 cannot continue to rotate, the brake drum body 30 is fixed, and the power source 10 temporarily stops rotating.

[0020] At this time, the restriction of the positioning disk 51 on the rotation of the rotating disk 42 is released through the adjusting mechanism 70, as Figure 8 and Figure 9 shown. The adjusting mechanism 70 includes a rotating shaft 75 rotatably installed on the positioning rod 54 and a limiting shaft 71 installed on the movable rod 55. An eccentric wheel 74 is installed on the rotating shaft 75 and a connecting rod 72 is sleeved and installed on the limiting shaft 71. The connecting rod 72 is rotatably connected to the eccentric wheel 74 through a hinge shaft 73. When the eccentric wheel 74 rotates, it pushes and pulls the connecting rod 72 to drive the movable rod 55 to move up and down; By rotating the rotating shaft 75, the rotating shaft 75 drives the hinge shaft 73 to rotate around the rotating shaft 75 through the eccentric wheel 74. During the rotation of the hinge shaft 73, it pushes and pulls the rotating shaft 75 through the connecting rod 72, so that the rotating shaft 75 can drive the movable rod 55 to move up and down on the surface of the positioning rod 54. After the movable rod 55 moves out of the positioning groove 511 and the contact is restricted, the positioning disk 51 no longer restricts the rotation of the rotating disk 42. At this time, when the power source 10 is restarted, the dynamic balance test can be carried out.

[0021] At the same time, a locking mechanism 80 meshing with the threaded sleeve rod 62 is arranged inside the slide 523, as Figure 10 shown. The locking mechanism 80 includes a rotating groove 81 opened in the middle of the slide 523. A collar 82 is rotatably arranged in the rotating groove 81. The collar 82 includes an internal thread ring 821 with internal threads arranged on the inner wall meshing with the measuring part 64. The internal thread ring 821 is rotatably embedded in the rotating groove 81 through a fitting ring 822 arranged on the outer edge; An inner cavity 541 is opened inside the positioning rod 54, and a pushing part 83 is rotatably arranged in the middle of the inner cavity 541. An avoidance cavity 87 is opened at the joint of the positioning rod 54 and the rotating groove 81, and a lifting rod 85 is arranged through the middle of the avoidance cavity 87; Limit racks 86 meshing with the teeth 823 and abutting parts 84 abutting against the pushing part 83 are respectively installed at the upper and lower ends of the lifting rod 85; When the movable rod 55 moves out of the positioning groove 511 by lifting, the fixture 53 can still be moved through the pushing mechanism 60, asFigure 6 As shown, the pushing mechanism 60 includes an electric control push rod 61 installed inside the housing 52. The electric control push rod 61 pushes the clamp 53 to continue moving to fit the deformed position of the brake drum body 30; The pushing mechanism 60 further includes a mounting seat 63 arranged at the end of the accommodating cavity 521. The outer side of the mounting seat 63 is arc-shaped and has the same radian as the outer wall of the housing 52; A threaded sleeve rod 62 is installed on the mounting seat 63, and a thread meshing with the threaded sleeve rod 62 is provided in the middle of the sliding table 523; Through this design, when the movable rod 55 is inserted into the positioning groove 511, the positioning rod 54 and the movable rod 55 move along the inner wall track of the positioning groove 511. At the same time, since the abutting member 84 is not abutted by the pushing member 83, under the action of gravity, the lifting rod 85 drives the abutting member 84 and the limit rack 86 to descend. The meshing of the limit rack 86 with the tooth 823 is disengaged and retracted into the avoidance cavity 87. At this time, due to the lack of restriction of the limit rack 86, the internal thread ring 821 can rotate in the rotation groove 81 in cooperation with the fitting ring 822. When the sliding table 523 moves horizontally under the restriction of the slide rail 522, the internal thread ring 821 moves along the surface of the threaded sleeve rod 62 with the sliding table 523. At this time, since the internal thread ring 821 is not restricted, when the internal thread ring 821 meshes with the threaded sleeve rod 62, it only rotates inside the rotation groove 81, so it cannot affect the normal movement of the sliding table 523; When the thickness of the inner wall of the brake drum body 30 changes due to deformation, some of the clamps 53 cannot abut against the inner wall of the brake drum body 30 when moving the same distance. At this time, the movable rod 55 needs to be removed from the positioning groove 511; The pushing member 83 rotates to abut against the abutting member 84 and pushes the lifting rod 85 to rise. The limit rack 86 is ejected from the avoidance cavity 87 and contacts and meshes with the tooth 823. At this time, under the restriction of the limit rack 86 and the tooth 823, the internal thread ring 821 cannot rotate in the rotation groove 81. At this time, the electric control push rod 61 is started to extend the output end of the electric control push rod 61. Since the threaded sleeve rod 62 meshes with the internal thread ring 821 and the internal thread ring 821 cannot rotate, the threaded sleeve rod 62 and the internal thread ring 821 are in a mutually locked state at this time. After the electric control push rod 61 extends, it can drive the sliding table 523 to move through the threaded sleeve rod 62 until the sliding table 523 drives the clamp 53 to abut against the inner wall of the deformed brake drum body 30. When the clamp 53 can move for the second time, it can be judged that the inner wall thickness of the brake drum body 30 has changed due to deformation, and the method of simply adding balance weights cannot be used to achieve dynamic balance, avoiding the potential safety hazards caused by misjudgment defects.

[0022] For the convenience of recording the degree of deformation, such as Figure 11 and 12As shown in the figure, a measuring member 64 passing through the mounting seat 63 is installed at the end of the output end of the electric control push rod 61, and a scale is engraved on the surface of the measuring member 64. According to the length of the part of the measuring member 64 extending from the mounting seat 63, the deformation condition of the inner wall of the brake drum body 30 can be obtained.

[0023] Meanwhile, in order to enable the lifting of the movable rod 55 and the meshing of the limit rack 86 and the collar 82 to be synchronized, a through hole is formed in the middle of the pushing member 83, and a rotating shaft 75 is disposed through the middle of the through hole; When the rotating shaft 75 rotates to pull the movable rod 55 to lift and release the connection with the positioning disk 51, the pushing member 83 rotates with the rotating shaft 75 and pushes the abutting member 84 to rise. The abutting member 84 pushes the limit rack 86 to rise through the lifting rod 85. After the limit rack 86 reaches the highest point, it meshes with the tooth 823, thereby realizing the switching of the moving mode of the sliding table 523 and the release of the fixation of the sliding table 523; A driving motor 90 is further installed on the positioning rod 54, and the end of the rotating shaft 75 near the driving motor 90 is connected to the output end of the driving motor 90.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An automated brake drum balance detection device, comprising a power source (10), a placement frame (20) mounted on the power source (10), and a brake drum body (30), characterized in that: The placement rack (20) is provided with a rotating mechanism (40) connected to the output end of the power source (10), the rotating mechanism (40) comprising a rotating disk (42) driven to rotate by the power source (10), and a clamping mechanism (50) is installed on the rotating disk (42); The clamping mechanism (50) comprises a housing (52) mounted on the rotating disk (42), a clamp (53) being arranged on the housing (52), and a movable rod (55) which can be lifted and lowered is arranged at the bottom of the clamp (53); A positioning plate (51) is disposed in the middle of the plurality of shells (52), and a positioning groove (511) for inserting a movable rod (55) is provided on the surface of the positioning plate (51). When the rotating plate (42) rotates, the clamp (53) moves horizontally along the center line until it fits against the inner wall of the brake drum body (30); After the movable rod (55) is moved out of the positioning groove (511) by lifting, the clamp (53) can also be moved by the pushing mechanism (60). The pushing mechanism (60) includes an electric control push rod (61) installed in the housing (52). The electric control push rod (61) pushes the clamp (53) to continue moving to fit the deformed position of the brake drum body (30).

2. The automatic brake drum balance detection device according to claim 1, characterized in that: The rotating mechanism (40) further comprises a rotating chamber (41) mounted on the placement frame (20); the rotating disk (42) is rotatably arranged inside the rotating chamber (41); a mounting shaft (44) penetrating the middle of the rotating disk (42) is mounted in the middle of the rotating chamber (41); and the positioning disk (51) is fixedly mounted on the mounting shaft (44); A transmission rod (43) is installed at the output end of the power source (10), and the transmission rod (43) and the rotating disk (42) are meshed with each other. When the power source (10) rotates, the transmission rod (43) drives the rotating disk (42) to rotate around the installation shaft (44) as the axis.

3. The automatic brake drum balance detection device according to claim 1, characterized in that: The housing (52) further comprises a slide rail (522) installed in the accommodating cavity (521) and a slide table (523) slidably embedded on the slide rail (522); a straight groove for the positioning rod (54) to move is provided in the middle of the slide rail (522); The clamp (53) and the positioning rod (54) are respectively mounted on the top and bottom of the slide table (523); the movable rod (55) is movably sleeved on the surface of the positioning rod (54) and is lifted and lowered by the adjustment mechanism (70).

4. The automatic brake drum balance detection device according to claim 3, characterized in that: The adjustment mechanism (70) comprises a rotating shaft (75) rotatably mounted on the positioning rod (54) and a limiting shaft (71) mounted on the movable rod (55); an eccentric wheel (74) is mounted on the rotating shaft (75) and a connecting rod (72) is sleeved and mounted on the limiting shaft (71); the connecting rod (72) and the eccentric wheel (74) are rotatably connected via a hinge shaft (73); when the eccentric wheel (74) rotates, the connecting rod (72) is pushed and pulled to drive the movable rod (55) to rise and fall.

5. The automatic brake drum balance detection device according to claim 4, characterized in that: The pushing mechanism (60) further comprises a mounting seat (63) arranged at the end of the accommodating cavity (521); an outer side surface of the mounting seat (63) is arranged to be arc-shaped and has the same arc as the outer wall of the housing (52); A threaded sleeve rod (62) is mounted on the mounting seat (63), and a thread meshing with the threaded sleeve rod (62) is provided in the middle of the slide table (523).

6. The automatic brake drum balance detection device according to claim 5, characterized in that: A measuring piece (64) penetrating the mounting seat (63) is mounted at the end of the output end of the electric control push rod (61), and a scale is engraved on the surface of the measuring piece (64).

7. The automatic brake drum balance detection device according to claim 5, characterized in that: A locking mechanism (80) meshing with the threaded sleeve rod (62) is arranged inside the slide (523), the locking mechanism (80) comprising a rotation groove (81) provided in the middle of the slide (523), a sleeve ring (82) rotatably arranged in the rotation groove (81), the sleeve ring (82) comprising an internal thread ring (821) having a thread meshing with the measuring member (64) arranged on the inner wall, the internal thread ring (821) being rotatably embedded in the rotation groove (81) via an embedded ring (822) arranged on the outer edge.

8. The automatic brake drum balance detection device according to claim 7, characterized in that: An inner cavity (541) is provided inside the positioning rod (54), and a pushing member (83) is rotatably provided in the middle of the inner cavity (541); a contact avoidance cavity (87) is provided at the junction of the positioning rod (54) and the rotating groove (81), and a lifting rod (85) is provided through the middle of the contact avoidance cavity (87); The upper and lower ends of the lifting rod (85) are respectively provided with a limit rack (86) meshing with the teeth (823) and an abutment member (84) abutting against the pushing member (83).

9. The automatic brake drum balance detection device according to claim 8, characterized in that: A through hole is provided in the middle of the pushing member (83), and a rotating shaft (75) is provided through the middle of the through hole; When the rotating shaft (75) is lifted by rotating and pulling the movable rod (55) to release the connection with the positioning plate (51), the pushing member (83) rotates with the rotating shaft (75) and pushes the abutting member (84) to rise. The abutting member (84) pushes the limiting rack (86) to rise through the lifting rod (85). After the limiting rack (86) reaches the highest point, it meshes with the teeth (823).

10. The automatic brake drum balance detection device according to claim 9, characterized in that: A driving motor (90) is also mounted on the positioning rod (54), and the end of the rotating shaft (75) close to the driving motor (90) is connected to the output end of the driving motor (90).

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