Transmission device for a tire dynamic balancing machine

Abstract

The embodiment of the application provides a transmission device for a tire dynamic balancing machine, and relates to the technical field of balancing machine equipment, comprising a support, a transmission sleeve is fixed on the support, a mandrel is rotationally connected in the transmission sleeve through a bearing, a wheel fixing part is connected to one end of the mandrel, a connecting device matched with a cylinder assembly is connected to the other end of the mandrel, a pull rod is arranged in the mandrel, the connecting device comprises a belt pulley coaxially connected to the mandrel, the belt pulley is connected with an external servo motor through a belt, a plurality of gas springs are fixed on the belt pulley, an abutting plate connected with the plurality of gas springs and matched with the cylinder assembly is arranged on the pull rod, a plurality of supporting columns parallel to the pull rod are connected to the belt pulley, a supporting plate connected with the plurality of supporting columns is fixed to the end of the supporting column, the gas spring cylinder body penetrates through the supporting plate and is fixedly connected with the supporting plate, and the pull rod penetrates through the supporting plate and is slidingly connected with the supporting plate. The application has the effects of improving stability and detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of balancing machine equipment technology, and in particular to a transmission device for a tire dynamic balancing machine. Background Technology

[0002] A tire dynamic balancer is a specialized device used to balance tires. It rotates the tire and detects the imbalance point, then adds appropriate weights to the tire to balance it, thereby improving the vehicle's driving stability and ride comfort.

[0003] Chinese patent CN223442107U discloses a tire locking device for a balancing machine. It includes a machine housing with a fixed bracket inside. A main shaft body is located at the top of the housing, with one end inside the housing and the other end extending to the outside of the housing. A wheel assembly is fitted onto one end of the main shaft body, and a pneumatic sleeve is located on one side of the wheel assembly. A cylinder assembly is located at one end of the fixed bracket, and a gas spring assembly is located on the outside of the main shaft body. A ball bearing clamping structure is located on the inner side of one end of the main shaft body, which allows the pneumatic sleeve to engage or disengage with the main shaft body when the main shaft body moves axially, thereby fixing or removing the wheel assembly.

[0004] Regarding the above-mentioned technology, the inventors believe that the gas spring assembly and its fixing structure are installed on the extension of the main shaft (spindle component) and will rotate at high speed along with the main shaft. Due to the setting of the gas spring assembly, the main shaft (spindle component) becomes unbalanced in mass, which amplifies harmful vibrations, thereby affecting the detection accuracy, running stability and mechanical reliability of the tire dynamic balancing machine. Utility Model Content

[0005] To solve the above-mentioned technical problems, this application provides a transmission device for a tire dynamic balancing machine.

[0006] The transmission device for a tire dynamic balancing machine provided in this application adopts the following technical solution:

[0007] A transmission device for a tire dynamic balancing machine includes a support bracket for fixing, a transmission sleeve fixed on the support bracket, a spindle component with both ends protruding outside the transmission sleeve rotatably connected to the transmission sleeve via bearings, one end of the spindle component being connected to a wheel fixing part, and the other end being connected to a connecting device that mates with a cylinder assembly, a pull rod passing through the spindle component, the connecting device including a pulley coaxially connected to the spindle component, the pulley being connected to an external servo motor via a belt, a plurality of gas springs fixed on the pulley, an abutment plate connected to the plurality of gas springs and mates with the cylinder assembly provided on the pull rod, a plurality of support columns parallel to the pull rod connected to the pulley, a support plate connected to the plurality of support columns fixed at the end of the support columns, a gas spring cylinder body passing through the support plate and fixedly connected to the support plate, and the pull rod passing through the support plate and slidably connected to the support plate.

[0008] Furthermore, the pulley is provided with a positioning groove for positioning the gas spring cylinder body, and a positioning plate inserted into the corresponding positioning groove is fixed at the end of the gas spring cylinder body. A positioning magnet is fixed at the bottom of the positioning groove to attract the positioning plate and prevent the positioning plate from falling out of the positioning groove.

[0009] Furthermore, the gas spring cylinder body is mounted on the support plate, and the support plate is threaded with a positioning bolt, the end of which is fixed with a rubber pad that abuts against the gas spring cylinder body.

[0010] Furthermore, the support plate has a guide sleeve at its center for the pull rod to pass through, and a linear bearing or lubrication bushing is provided between the pull rod and the guide sleeve.

[0011] Furthermore, the end of the pull rod is threaded with a threaded sleeve, the abutment plate is sleeved on the pull rod and rotatably connected to the threaded sleeve, an abutment is fixed on the output shaft of the cylinder assembly, the end of the abutment abuts against the end face of the abutment plate, the pull rod protruding outside the abutment plate passes through the abutment, and the abutment plate is provided with an adjustment component for adjusting the positional relationship between the pull rod and the abutment plate.

[0012] Furthermore, the adjusting assembly includes an adjusting cylinder that penetrates the abutment plate, the adjusting cylinder being threadedly connected to the abutment plate, and the pull rod passing through the adjusting cylinder and abutting against the bottom wall of the adjusting cylinder.

[0013] Furthermore, the mandrel component has a stepped shaft on its surface, the pulley is sleeved on the mandrel component and abuts against the end face of the stepped shaft, the inner wall of the pulley is provided with a serrated protrusion, the outer wall of the end of the mandrel component is provided with a serrated groove that mates with the serrated protrusion, and the mandrel component is provided with a fixing component to prevent the pulley from detaching from the mandrel component.

[0014] Furthermore, the pulley portion protrudes outside the spindle component, and the fixing assembly includes a fixing shaft passing through the pulley, a fixing screw threaded to the spindle component at the end of the fixing shaft, and a fixing disc abutting against the end face of the pulley fixed on the fixing shaft.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] Effectively eliminates rotational imbalance and significantly improves detection accuracy: By fixing the gas spring cylinder to the pulley driving the main shaft, rather than directly mounting it on components that rotate at high speed with the main shaft, the imbalance problem caused by the gas spring and its mounting structure as additional rotating mass is fundamentally avoided. This reduces harmful vibrations of the spindle components during high-speed rotation, providing a stable and clean mechanical reference for high-precision detection of tire imbalance, thereby improving the overall detection accuracy of the dynamic balancing machine.

[0017] Stable structure and convenient installation: By setting up a rigid support frame consisting of support columns and support plates, a stable and static installation foundation is provided for the gas spring.

[0018] The design of the positioning groove, positioning plate, and positioning magnet on the pulley enables the gas spring to be quickly and accurately aligned and pre-fixed, simplifying the assembly process and ensuring consistent installation.

[0019] The gas spring is securely fixed and has strong anti-interference capabilities: the positioning bolts on the support plate, together with the rubber pads, can flexibly press against the gas spring cylinder from the side. This effectively prevents the gas spring from shifting or loosening during equipment start-up, shutdown, or operation, ensuring stable force application; the flexible contact of the rubber pads can also absorb some high-frequency micro-vibrations, avoiding stress concentration or damage that may be caused by rigid locking, thus balancing the reliability of the fixation with the protection of the components.

[0020] Precise guide for the pull rod's movement and low frictional resistance: A guide sleeve with a linear bearing or lubricating bushing is installed at the center of the support plate, providing precise linear guidance for the axial movement of the pull rod. This not only reduces the wobble and frictional resistance during the pull rod's movement, making the cylinder drive smoother and more responsive, but also reduces wear on the mating holes of the pull rod and support plate, which is beneficial for maintaining operational accuracy over the long term.

[0021] The locking force is easy to adjust and has wide adaptability: the initial position of the pull rod and the pre-compression of the gas spring can be easily and accurately adjusted through the threaded sleeve connection between the abutment plate and the pull rod. At the same time, the pre-compression of the gas spring can be maintained by rotating the adjusting cylinder. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0023] Figure 2 This is a structural schematic diagram used in this application to illustrate the connection relationship of the pulleys.

[0024] Explanation of reference numerals in the attached drawings: 1. Bracket; 2. Transmission sleeve; 3. Spindle; 4. Wheel fixing part; 5. Tie rod; 6. Pulley; 7. Gas spring; 8. Abutment plate; 9. Support column; 10. Support plate; 11. Guide sleeve; 12. Positioning groove; 13. Positioning plate; 14. Positioning bolt; 15. Threaded sleeve; 16. Adjusting cylinder; 17. Fixed shaft; 18. Fixed screw; 19. Fixed plate. Detailed Implementation

[0025] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two. The term “and / or” is used to describe the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can indicate: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0026] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0027] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0028] This application discloses a transmission device for a tire dynamic balancing machine, referring to... Figure 1 The device includes a bracket 1 that fixes the device to the chassis, a transmission sleeve 2 that is fixed on the bracket 1, a spindle 3 that passes through the transmission sleeve 2, the spindle 3 that rotates in the transmission sleeve 2 through a bearing, a wheel fixing part 4 that is connected to one end of the spindle 3, and a connecting device that cooperates with the cylinder assembly that is connected to the other end of the spindle 3.

[0029] Reference Figure 1 and Figure 2 A pull rod 5 is inserted inside the spindle 3. The pull rod 5 slides axially relative to the spindle 3. The connecting device includes a pulley 6 coaxially connected to the spindle 3. The pulley 6 is connected to the servo motor in the chassis via a belt. Several gas springs 7 are fixed on the pulley 6. The pull rod 5 is provided with an abutment plate 8 that connects the piston rods of the gas springs 7. The abutment plate 8 moves in coordination with the cylinder assembly. Several support columns 9 parallel to the pull rod 5 are connected to the pulley 6. A support plate 10 is fixed to the end of the support column 9. The support plate 10 connects the several support columns 9. The cylinder body of the gas spring 7 passes through the support plate 10. The cylinder body of the gas spring 7 is fixedly connected to the support plate 10. A guide sleeve 11 for the pull rod 5 to pass through is provided at the center of the support plate 10. A linear bearing or lubrication bushing is provided between the pull rod 5 and the guide sleeve 11.

[0030] Reference Figure 1 and Figure 2 The pulley 6 has a positioning groove 12 for positioning the cylinder body of the gas spring 7. The end of the cylinder body of the gas spring 7 is fixed with a positioning plate 13 inserted into the corresponding positioning groove 12. The cooperation between the positioning groove 12 and the positioning plate 13 ensures the high consistency and symmetry of the installation positions of multiple gas springs 7, which is the basic premise for realizing the static and dynamic balance of the spindle system and reduces the imbalance caused by installation errors from the source. A positioning magnet is fixed to the bottom of the positioning groove 12, which attracts the positioning plate 13 and prevents the positioning plate 13 from detaching from the positioning groove 12. The magnetic pre-fixing function allows the gas spring 7 to be installed without the need for a dedicated person to hold it steady or use temporary clamps. A single person can easily operate it, which greatly shortens the assembly time. The cylinder of the gas spring 7 passes through the support plate 10. The support plate 10 is threaded with a positioning bolt 14. The end of the positioning bolt 14 is fixed with a rubber pad that abuts against the cylinder of the gas spring 7. The active mechanical locking force provided by the positioning bolt 14 can reliably prevent the gas spring 7 from axial movement or circumferential rotation in the working environment of long-term start-stop, high-speed operation or vibration, ensuring the stability of the locking force transmission path. The rubber pad avoids surface indentations, scratches or local stress concentration that may be caused by the direct hard pressing of the metal bolt against the cylinder. The elasticity of the rubber makes the locking force distribution more uniform and can absorb and isolate some high-frequency micro-vibrations, which not only achieves a firm fixation, but also protects the surface of the gas spring 7 cylinder and extends the service life of key components.

[0031] Reference Figure 1 and Figure 2A threaded sleeve 15 is threaded to the end of the pull rod 5. An abutment plate 8 is sleeved on the pull rod 5 and rotatably connected to the threaded sleeve 15. An abutment member is fixed on the output shaft of the cylinder assembly. The end of the abutment member abuts against the end face of the abutment plate 8. The pull rod 5, protruding from the abutment plate 8, passes through the abutment member. An adjustment assembly for adjusting the positional relationship between the pull rod 5 and the abutment plate 8 is provided on the abutment plate 8. The adjustment assembly includes an adjustment cylinder 16 that passes through the abutment plate 8. The adjustment cylinder 16 is threaded to the abutment plate 8. The pull rod 5 passes through the adjustment cylinder 16 and abuts against the bottom wall of the adjustment cylinder 16. By rotating the threaded sleeve 15 and the adjustment cylinder 16, the positional relationship between the abutment plate 8 and the pull rod 5 on the pull rod 5 is adjusted, thereby adjusting the positional relationship between the abutment member and the abutment plate 8. At the same time, the compression stroke of the gas spring 7 can also be adjusted in this way. This is an intelligent module that integrates precise fine adjustment, reliable limiting, efficient force transmission, and easy maintenance.

[0032] Reference Figure 1 and Figure 2 The mandrel 3 has a stepped shaft on its surface. The pulley 6 is fitted onto the mandrel 3 and abuts against the end face of the stepped shaft. The stepped shaft on the surface of the mandrel 3 forms a precise shoulder. During installation, the inner end face of the pulley 6 directly abuts against this shoulder, thus determining the axial position of the pulley 6 on the mandrel in one step. The inner wall of the pulley 6 has serrated protrusions, and the outer wall of the end of the mandrel 3 has serrated grooves that mate with the serrated protrusions. The serrated protrusions on the inner wall of the pulley 6 and the serrated grooves on the outer wall of the end of the mandrel 3 form a multi-tooth meshing. At the moment of fitting, these serrations mesh with each other, automatically completing the precise alignment of the pulley 6 and the mandrel in the circumferential direction, and pre-determining their unique relative angular position to ensure dynamic balance. When the servo motor drives the pulley 6 to rotate through the belt, the driving torque is directly and rigidly transmitted to the mandrel through the meshing side of the serrated protrusions and serrated grooves. Compared to traditional single-key connections, this multi-tooth simultaneous force-bearing method has a larger contact area, stronger load-bearing capacity, can efficiently transmit the large torque required for high-speed rotation, and has a uniform stress distribution.

[0033] Reference Figure 1 and Figure 2 A pulley 6 is fitted onto a spindle 3, with a portion of the pulley 6 protruding from the spindle 3. The spindle 3 has a fixing assembly to prevent the pulley 6 from detaching from it. This fixing assembly includes a fixing shaft 17 passing through the pulley 6, with a fixing screw 18 threadedly connected to the spindle 3 at one end of the fixing shaft 17. A fixing disc 19, which abuts against the end face of the pulley 6, is fixed to the fixing shaft 17. The fixing shaft 17 passes through a through hole in the center of the pulley 6, and the fixing screw 18 at one end is screwed into a central threaded hole at the end of the spindle 3. When the fixing screw 18 is tightened, the fixing disc 19 abuts against the pulley 6, pulling the entire fixing shaft 17 towards the spindle 3, thus fixing the pulley 6 and facilitating its installation and removal.

[0034] The above are merely preferred embodiments of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included within the protection scope recorded in the claims.

Claims

1. A transmission device for a tire dynamic balancing machine, comprising a bracket (1) for fixing, a transmission sleeve (2) fixed on the bracket (1), a spindle (3) with both ends protruding outside the transmission sleeve (2) being rotatably connected to the transmission sleeve (2) via bearings, a wheel fixing part (4) being connected to one end of the spindle (3), and a connecting device cooperating with a cylinder assembly being connected to the other end, a pull rod (5) being provided inside the spindle (3), the connecting device comprising a pulley (6) coaxially connected to the spindle (3), the pulley (6) being connected to an external servo motor via a belt, a plurality of gas springs (7) being fixed on the pulley (6), and an abutment plate (8) being provided on the pull rod (5) connecting the plurality of gas springs (7) and cooperating with the cylinder assembly, characterized in that: The pulley (6) is connected to several support columns (9) parallel to the pull rod (5). The end of the support column (9) is fixed with a support plate (10) that connects the several support columns (9). The cylinder of the gas spring (7) passes through the support plate (10) and is fixedly connected to the support plate (10). The pull rod (5) passes through the support plate (10) and is slidably connected to the support plate (10).

2. The transmission device for a tire dynamic balancing machine according to claim 1, characterized in that: The pulley (6) is provided with a positioning groove (12) for positioning the cylinder of the gas spring (7). The end of the cylinder of the gas spring (7) is fixed with a positioning disc (13) inserted into the corresponding positioning groove (12). The bottom of the positioning groove (12) is fixed with a positioning magnet that attracts the positioning disc (13) and prevents the positioning disc (13) from falling out of the positioning groove (12).

3. The transmission device for a tire dynamic balancing machine according to claim 1, characterized in that: The gas spring (7) cylinder body is mounted on the support plate (10), and the support plate (10) is threaded with a positioning bolt (14), and the end of the positioning bolt (14) is fixed with a rubber pad that abuts against the gas spring (7) cylinder body.

4. The transmission device for a tire dynamic balancing machine according to claim 1, characterized in that: The support plate (10) has a guide sleeve (11) at its center for the pull rod (5) to pass through, and a linear bearing or lubrication bushing is provided between the pull rod (5) and the guide sleeve (11).

5. The transmission device for a tire dynamic balancing machine according to claim 3, characterized in that: The end of the pull rod (5) is threadedly connected to a threaded sleeve (15). The abutment plate (8) is sleeved on the pull rod (5) and rotatably connected to the threaded sleeve (15). An abutment is fixed on the output shaft of the cylinder assembly. The end of the abutment abuts against the end face of the abutment plate (8). The pull rod (5) protruding from the abutment plate (8) passes through the abutment. An adjustment component for adjusting the positional relationship between the pull rod (5) and the abutment plate (8) is provided on the abutment plate (8).

6. The transmission device for a tire dynamic balancing machine according to claim 5, characterized in that: The adjustment assembly includes an adjustment cylinder (16) that passes through the abutment plate (8), the adjustment cylinder (16) being threaded onto the abutment plate (8), and the pull rod (5) passing through the adjustment cylinder (16) and abutting against the bottom wall of the adjustment cylinder (16).

7. The transmission device for a tire dynamic balancing machine according to claim 1, characterized in that: The mandrel (3) has a stepped shaft on its surface. The pulley (6) is sleeved on the mandrel (3) and abuts against the end face of the stepped shaft. The inner wall of the pulley (6) has a serrated protrusion. The outer wall of the end of the mandrel (3) has a serrated groove that matches the serrated protrusion. The mandrel (3) is provided with a fixing component to prevent the pulley (6) from detaching from the mandrel (3).

8. A transmission device for a tire dynamic balancing machine according to claim 7, characterized in that: The pulley (6) protrudes out of the spindle (3). The fixing assembly includes a fixing shaft (17) passing through the pulley (6). The end of the fixing shaft (17) is fixed with a fixing screw (18) threaded to the spindle (3). A fixing disc (19) is fixed on the fixing shaft (17) and abuts against the end face of the pulley (6).

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