A hub bearing bolt length detection device

Abstract

This invention proposes a wheel hub bearing bolt length detection device, including a pressure-bearing mechanism. This mechanism comprises a medium transmission channel and a display unit and a pressure-bearing unit connected at both ends. The pressure-bearing unit, under the pressure of the product bolt, compresses the medium through the medium transmission channel, forming a medium height on the display unit that represents the bolt length. Through an original pressure-bearing mechanism design, bolt length detection is transformed into an intuitive display of medium height, completely eliminating reliance on high-cost automated detection equipment. This device utilizes the pressure-bearing unit to directly respond to the bolt pressure, driving the medium through the transmission channel to form a visual height change on the display unit. This not only amplifies the physical quantities of the detection process and enables second-level result interpretation but also significantly reduces equipment modification costs and debugging complexity.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub bearing bolt detection technology, specifically to a wheel hub bearing bolt length detection device. Background Technology

[0002] In the vehicle manufacturing process, wheel hub bearing bolts are key components connecting the wheel hub and bearing. Their length accuracy has a decisive impact on the assembly quality of the wheel hub bearing and the vehicle's driving safety. If the bolt length does not meet the standard, being too long may prevent proper assembly, while being too short will not provide sufficient preload, resulting in an insecure connection between the wheel hub and bearing and posing a significant safety hazard.

[0003] In actual production scenarios, bolt mixing frequently occurs. Bolts of different specifications and lengths are mixed together, which can easily lead to incorrect assembly and subsequently trigger multiple quality incidents. This not only causes product recalls and increased repair costs but also seriously damages the company's reputation. Currently, conventional solutions for bolt length inspection mostly rely on automated inspection equipment. However, the modification of these devices is significantly constrained by hardware conditions, and the modification costs are high. Furthermore, the modification process requires a significant investment of manpower, resources, and time for equipment debugging and adaptation. More importantly, the modified equipment has poor versatility, often only applicable to a single machine, making it difficult to promote and apply in different production scenarios and equipment, and failing to effectively meet the actual needs of enterprises in dealing with bolt mixing inspection and flexible production. Therefore, there is an urgent need for a highly versatile and easy-to-implement inspection solution. Summary of the Invention

[0004] This invention proposes a wheel hub bearing bolt length detection device, which solves the technical problems of low efficiency and poor versatility of manual inspection of wheel hub bearing bolts in the prior art.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A wheel hub bearing bolt length detection device includes a pressure bearing mechanism, which includes a medium transmission channel and a display unit and a pressure receiving unit connected at both ends. The pressure receiving unit is subjected to the pressure of the product bolt, which compresses the medium through the medium transmission channel to form a medium height on the display unit that represents the bolt length.

[0007] Furthermore, the display unit is a visualization medium tube that receives the medium flowing into the medium transmission channel and displays it visually.

[0008] Furthermore, the pressure-bearing unit is a piston body with a cavity for storing the medium inside. A piston column extending into the cavity is provided above the piston body. The piston column is pressed down along the cavity by the bolt and squeezes the medium out of the medium transmission channel and into the visible medium tube.

[0009] Furthermore, the piston rod is provided with a sealing structure located inside the cavity, and the sealing structure is a sealing ring.

[0010] Furthermore, a pressure cap is threaded onto the inner side of the top of the piston body, and the piston rod passes through the pressure cap and is slidably connected to it.

[0011] Furthermore, the cavity is provided with an elastic element, the two ends of which abut against the bottom of the piston rod and the inner bottom wall of the cavity, respectively.

[0012] Furthermore, it also includes a support positioning component, which includes a base with one side bent to provide a visible mounting base for the media tube.

[0013] Furthermore, the base is provided with a bearing positioning platform, which has multiple opening slots, wherein the piston body has an anti-detachment protrusion on the outside to be suspended or positioned on the opening slot.

[0014] Furthermore, it also includes an adjustable product positioning platform mounted above the support positioning platform. The product positioning platform is hollow and has multiple positioning ports, which are used to pass through the product bolts to push the piston column.

[0015] Furthermore, the top of the bearing positioning platform is provided with multiple threaded columns, and the bottom of the product positioning platform is rotatably provided with multiple threaded sleeves. The threaded sleeves are threadedly connected to the threaded columns to meet the height adjustment of the product positioning platform.

[0016] The beneficial effects of the technical solution provided in this application are as follows:

[0017] 1. This wheel hub bearing bolt length detection device, through its innovative pressure-bearing mechanism design, transforms bolt length detection into an intuitive display of media height, completely eliminating reliance on high-cost automated testing equipment. The device utilizes a pressure-bearing unit to directly respond to the downward pressure on the bolt, driving the medium through a transmission channel to create a visual height change on the display unit. This not only amplifies the physical quantities of the detection process and enables second-level result interpretation but also significantly reduces equipment modification costs and debugging complexity. Its purely mechanical working principle requires no electrical support, allowing for rapid deployment to wheel hub bearing workstations on different production lines. It fundamentally solves the industry pain points of existing technologies, such as poor equipment versatility, long modification cycles, and high single-unit adaptation costs.

[0018] 2. This wheel hub bearing bolt length detection device employs an innovative approach that uses pressure transmitted through the medium to represent height, transforming minute bolt length tolerances into visually perceptible liquid level differences. This physical quantity conversion avoids the susceptibility of electronic sensors to environmental interference and ensures the stability and reliability of the detection through a passive operating mode. Operators only need to observe the medium level to determine anomalies, significantly improving the efficiency of mixed material detection while enabling a single device to cover multiple bolt specification detection scenarios, providing strong technical support for flexible production in enterprises. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the pressure-bearing mechanism of this utility model;

[0021] Figure 2 This is a schematic diagram of the pressure-bearing unit of this utility model;

[0022] Figure 3 This is a schematic diagram of the bearing and positioning component of this utility model;

[0023] Figure 4 This is a schematic diagram of the wheel hub bearing bolt length detection device of this utility model;

[0024] Figure 5 This is a schematic diagram of the product mounted on the wheel hub bearing bolt length detection device of this utility model.

[0025] In the figure: 10 Pressure bearing mechanism, 11 Medium transmission channel, 12 Display unit, 13 Pressure-bearing unit, 14 Cavity, 15 Piston column, 16 Sealing structure, 17 Elastic element, 20 Bearing positioning component, 21 Base, 22 Bearing positioning platform, 23 Opening groove, 24 Threaded column, 30 Product positioning platform, 31 Positioning port, 32 Threaded sleeve. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Reference Figure 1-5A wheel hub bearing bolt length detection device includes a pressure-bearing mechanism 10, which comprises a medium transmission channel 11 and a display unit 12 and a pressure-bearing unit 13 connected at both ends. The pressure-bearing unit 13, under the pressure of the product bolt, compresses the medium through the medium transmission channel 11, forming a medium height on the display unit 12 that characterizes the bolt length. The pressure-bearing mechanism 10 directly converts the bolt pressure into a medium driving force through the pressure-bearing unit 13, causing the medium to flow directionally through the medium transmission channel 11 to the display unit 12, ultimately transforming the abstract bolt length into a visualized medium height signal. This design replaces the electronic sensing system with a purely mechanical structure, eliminating the equipment's dependence on power and the risk of signal interference. Furthermore, it achieves intuitive amplification of the detection results through physical medium transmission, providing operators with a quick and easily identifiable detection basis. When the product bolt presses against the pressure unit 13, it generates displacement and squeezes the medium inside, forcing the medium to enter the sealed space of the display unit 12 through the medium transmission channel 11. Since the total amount of medium is constant, under the condition that the cross-sectional area of ​​the display unit 12 is fixed, the small difference in the bolt pressing stroke is amplified into a significant change in liquid level. Thus, the bolt length qualification can be determined in seconds by simply marking the baseline on the display unit 12.

[0028] In some embodiments, the display unit 12 is a visualization medium tube that receives and visualizes the medium flowing into the medium transmission channel 11. The visualization medium tube displays the internal medium height in real time through its transparent wall, converting the volume change of the medium transmitted by the pressure unit 13 into a continuously visible height scale. Its core function is to establish a physical scale that can be intuitively measured by the human eye, allowing operators to simultaneously capture the detection status without the need for external instruments. This completely eliminates the signal conversion delay and misreading risks required by electronic display devices, providing zero-delay visual criteria for rapid decision-making on the production line. When the medium is injected into the sealed cavity of the visualization medium tube through the transmission channel 11, the medium rises vertically along the tube due to its incompressibility. Because the tube's cross-sectional area is globally uniform and transparent, the equal volume change of the medium driven by the bolt's downward stroke is linearly mapped to a height displacement. At this point, the operator can directly compare the relative position of this height with the preset baseline of the tube wall to achieve passive real-time determination of the bolt length's qualification. The medium can be a liquid, preferably a colored liquid.

[0029] In some embodiments, the pressure-bearing unit 13 is a piston body with a cavity 14 for storing the medium inside. A piston rod 15 extends into the cavity 14 from above the piston body. The piston rod 15 moves downward along the cavity 14 under the pressure of the bolt and squeezes the medium out of the medium transmission channel 11 and into the visible medium tube. The pressure-bearing unit 13 with the piston body structure converts the linear downward pressure of the bolt into a directional squeezing driving force on the medium in the cavity 14 through the piston rod 15, constructing a closed force-hydraulic conversion system: the precise sliding of the piston rod 15 in the cavity 14 ensures that the medium is discharged in a controlled and directional manner into the transmission channel 11, and the rigid constraint of the cavity 14 maintains the medium pressure transmission efficiency, eliminating the stroke loss error in traditional elastic element detection from the source. When the bolt presses the piston column 15, the piston column 15 moves axially along the cavity 14 and compresses the internal volume of the cavity 14, forcing an equal volume of medium to be discharged through the transmission channel 11. Since the piston column 15 and the cavity 14 form a dynamic sealing fit, the bolt pressing stroke is converted into the medium discharge volume without loss. At this time, the downward movement distance of the piston column 15 is strictly proportional to the volume of medium discharged into the visual medium pipe, providing a linear and traceable physical benchmark for bolt length detection.

[0030] In some embodiments, a sealing structure 16, which is a sealing ring, is provided on the outside of the piston rod 15 and located inside the cavity 14. The sealing structure 16 forms a dynamic pressure barrier between the sliding interface of the piston rod 15 and the cavity 14, blocking abnormal leakage of the medium along the mating gap. This ensures that 100% of the medium volume driven by the bolt pressure is directionally delivered to the display unit 12 through the transmission channel 11, essentially eliminating detection distortion caused by medium leakage and providing a zero-loss hydraulic transmission environment for length measurement. When the piston rod 15 moves downward along the cavity 14 under bolt pressure, the sealing ring 16 expands under the lateral pressure of the medium and tightly adheres to the inner wall of the cavity 14, maintaining adaptive contact sealing throughout the movement of the piston rod 15. At this time, the compressed medium in the cavity 14 can only be discharged through a single outlet of the transmission channel 11. The precise displacement of the piston rod 15 is thus losslessly converted into an equal volume of medium output, laying the foundation for the metrological reliability of bolt length detection.

[0031] In some embodiments, the cavity 14 is provided with an elastic element 17, with its two ends abutting against the bottom of the piston column 15 and the inner bottom wall of the cavity 14, respectively. The elastic element 17 constructs an automatic reset system for the piston column 15 through pre-compression energy storage. After the bolt pressure is released, it instantly pushes the piston column 15 back to its initial position, simultaneously creating a negative pressure in the cavity 14 to draw back the medium in the visualization medium tube, providing a cyclic reset mechanism for continuous detection without manual intervention. When the bolt pressure compresses the piston column 15 and compresses the elastic element 17, the elastic element 17 stores deformation potential energy. After the detection is completed and the external force is removed, the elastic element 17 releases its potential energy to push the piston column 15 upward to reset. At this time, the volume of the cavity 14 expands, generating a negative pressure, which draws the medium in the transmission channel 11 and the visualization medium tube back into the cavity 14, realizing the liquid level returning to zero and the detection state being automatically reset, allowing the device to immediately respond to the next round of detection commands.

[0032] In some embodiments, a support and positioning component 20 is also included, comprising a base 21 with one side bent to provide a mounting foundation for the visualization medium tube. The bent base 21 provides a multi-dimensional spatial positioning reference for the visualization medium tube through its three-dimensional support structure, simultaneously solving the problems of vertically stable installation of the medium tube 10 and horizontal observation angle optimization with an integrated rigid structure. This eliminates the risk of misjudgment caused by tube vibration or viewing angle deviation during the detection process, constructing a zero-interference static reference system for accurate liquid level reading. When the visualization medium tube is installed on the bent plane of the base 21, the vertical section of the base 21 constrains the axial displacement of the medium tube 10, while the horizontal section provides radial support for the tube. At this time, the mechanical triangular area formed by the bend converts external vibration energy into structural internal stress dissipation, keeping the medium tube 10 absolutely stationary under bolt impact loads. This ensures that fluctuations in liquid level height originate purely from changes in medium volume, providing an unshakeable spatial coordinate origin for the detection results.

[0033] In some embodiments, the base 21 is provided with a bearing positioning platform 22, which has multiple open slots 23. The piston body has anti-detachment protrusions on its outer side to suspend or position it on the open slots 23. When the piston body is suspended in the open slots 23 by the anti-detachment protrusions, the slot walls apply three-dimensional spatial constraints to the anti-detachment protrusions: the horizontal direction restricts the displacement of the piston body, and the vertical direction prevents it from jumping off during the detection process. The operator only needs to push the piston body to make the protrusion slide along the slot track to the target indexing position. Gravity and contact friction automatically lock the position. At this time, the downward pressure of the piston body is evenly transmitted to the rigid surface of the bearing positioning platform 22 to ensure the axial stability of the media extrusion pressure.

[0034] In some embodiments, a product positioning platform 30 is also included, adjustablely mounted above the support positioning platform 22. The product positioning platform 30 is hollow and has multiple positioning ports 31, which are used for product bolts to pass through in order to push against the piston column 15. The hollow product positioning platform 30 constructs a bolt spatial guidance matrix through multiple positioning ports 31. The geometric constraints of the positioning ports 31 guide the product bolts to accurately and vertically press against the piston column 15, eliminating the positional deviation of manual placement. The parallel layout of multiple ports supports the detection of multiple bolts at a time. When the wheel hub bearing product is placed on the positioning platform 30, its bolts naturally pass into the corresponding positioning ports 31. At this time, the inner wall of the positioning port 31 and the bolt gap fit form a dynamic self-correcting channel, forcing the bolt to move along a vertical trajectory under gravity and accurately reach the center point of the piston column 15 below. During this process, the hollow structure of the positioning platform 30 releases the displacement space of the piston column 15, while the distributed design of multiple ports allows each bolt to independently transmit pressure to the corresponding piston unit, realizing an efficient operation mode of multi-point synchronous detection.

[0035] In some embodiments, the top of the bearing positioning platform 22 is provided with multiple threaded posts 24, and the bottom of the product positioning platform 30 is rotatably provided with multiple threaded sleeves 32. The threaded sleeves 32 are threadedly connected to the threaded posts 24 to meet the height adjustment of the product positioning platform 30. The vertical position of the product positioning platform 30 can be precisely controlled by manual rotation, thereby effectively adapting to the height differences of the wheel hub bearing product bolts. When dealing with wheel hub bearings of different specifications, the operator does not need to use tools, but only needs to rotate the product positioning platform 30. The spiral movement of the threaded sleeves 32 and threaded posts 24 can realize the raising or lowering of the product positioning platform 30, ensuring that the bolt can always maintain a precise contact position with the piston post 15 after passing through the positioning port 31. When the user applies a rotational force to the product positioning platform 30, the threaded sleeve 32 fixed at its bottom rotates in or out around the threaded post 24 on the bearing positioning platform 22. The helical angle of the thread engagement drives the product positioning platform 30 to move up and down synchronously along the axis of the threaded post 24 through mechanical conversion. Each rotation converts the pitch value of the threaded sleeve 32 and the threaded post 24 into a linear displacement increment, thereby enabling the product positioning platform 30 to achieve continuous vertical height adjustment.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for detecting the length of wheel hub bearing bolts, characterized in that, It includes a pressure bearing mechanism (10), which includes a medium transmission channel (11) and a display unit (12) and a pressure-bearing unit (13) connected at both ends thereto. The pressure-bearing unit (13) is subjected to the pressure of the product bolts and squeezes the medium through the medium transmission channel (11) to form a medium height on the display unit (12) that represents the bolt length.

2. The wheel hub bearing bolt length detection device as described in claim 1, characterized in that, The display unit (12) is a visualization medium tube that receives the medium flowing into the medium transmission channel (11) and displays it visually.

3. The wheel hub bearing bolt length detection device as described in claim 2, characterized in that, The pressure unit (13) is a piston body with a cavity (14) for storing the medium inside. A piston column (15) extending into the cavity (14) is provided above the piston body. The piston column (15) is moved down along the cavity (14) under the pressure of the bolt and squeezes the medium out of the medium transmission channel (11) to the visual medium tube.

4. The wheel hub bearing bolt length detection device as described in claim 3, characterized in that, The piston rod (15) is provided with a sealing structure (16) located inside the cavity (14), and the sealing structure (16) is a sealing ring.

5. The wheel hub bearing bolt length detection device as described in claim 3, characterized in that, A pressure cap is threaded on the inner side of the top of the piston body, and the piston rod (15) passes through the pressure cap and is slidably connected to it.

6. The wheel hub bearing bolt length detection device as described in claim 3, characterized in that, The cavity (14) is provided with an elastic element (17), and the two ends of the elastic element (17) abut against the bottom of the piston column (15) and the inner bottom wall of the cavity (14), respectively.

7. The wheel hub bearing bolt length detection device as described in claim 3, characterized in that, It also includes a support positioning component (20), which includes a base (21) with one side bent to provide a visible medium tube mounting base.

8. The wheel hub bearing bolt length detection device as described in claim 7, characterized in that, The base (21) is provided with a bearing positioning platform (22), which has multiple opening slots (23), wherein the piston body has an anti-detachment protrusion on the outside to be suspended or positioned on the opening slots (23).

9. The wheel hub bearing bolt length detection device as described in claim 7, characterized in that, It also includes a product positioning platform (30) that is adjustablely mounted above the bearing positioning platform (22). The product positioning platform (30) is hollow and has multiple positioning ports (31). The positioning ports (31) are used to pass through the product bolts so as to push the piston column (15).

10. The wheel hub bearing bolt length detection device as described in claim 9, characterized in that, The top of the bearing positioning platform (22) is provided with multiple threaded columns (24), and the bottom of the product positioning platform (30) is provided with multiple threaded sleeves (32). The threaded sleeves (32) are threadedly connected to the threaded columns (24) to meet the height adjustment of the product positioning platform (30).

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