Rubber seal lip contact force testing equipment for wheel hub bearings

Abstract

The present invention discloses a wheel hub bearing rubber seal lip contact force detection device, comprising a base, a support plate arranged on the base, a cover plate for cooperating with the end face of the support plate to clamp and limit the external rubber seal, a bracket arranged on one side of the base, a loading member for applying a loading force to the outer edge of the cover plate to apply a loading force to the outer edge of the external rubber seal through the cover plate, and a first detection member for working in conjunction with the loading member to detect the displacement change of the rubber seal lip after being loaded with the loading force, a second detection member for detecting the force value of the cover plate arranged on the support plate, and an adjustment member for working in conjunction with the loading member to adjust the position of the loading member applying the loading force arranged on the bracket. The present invention solves the problems of the traditional bearing rubber seal lip contact force detection device having complicated detection steps, difficulty in adapting to seals of different sizes, and lack of a loading force applied to the seal for detection.

Description

Technical Field

[0001] The invention relates to the technical field of bearing seal detection equipment, in particular to a rubber seal lip contact force detection device for a hub bearing. Background Art

[0002] A seal is a sealing element that prevents gas, liquid, or solid from leaking into the external environment or external gas, liquid, or solid from entering the sealed space. Based on the principle of contact sealing, rubber is compressed and deformed under the action of contact pressure, and the material rebound force generates contact pressure on the contact surface, thereby forming a contact seal with the sealing cavity. The wheel hub bearing rubber seal is a combined sealing structure consisting of a lip seal and a retaining ring. The assembly process is to press the retaining ring (upper cover) down to contact the rubber lip until it reaches the appropriate assembly position. During the press-fitting process, the retaining ring and the seal lip are interference fit, and the rubber lip generates contact force to ensure the sealing performance. The size of the lip contact force plays a key role in the sealing performance and torque performance of the wheel hub bearing, so testing the size of the rubber seal lip contact force is crucial for developing rubber seals with low torque and high sealing performance.

[0003] At present, the radial contact force of the lip cannot be tested due to the inaccessibility of the contact position between the rubber lip and the retaining ring. Most manufacturers now use finite element analysis to simulate and calculate the lip contact stress by adjusting the size of the interference fit. However, the simulation calculation has a certain deviation from the actual product contact process, and the accuracy of the simulation calculation results lacks the verification of the actual test results. Therefore, most of the finite element analysis results are only used as a reference in the seal development process, and the actual use effect of the seal is still based on the mud and torque test results. Another method for measuring contact force is to transmit ultrasonic waves to the contact interface and use the ultrasonic reflection intensity of the contact interface to measure the contact area and contact force. This method is a non-contact measurement and has the advantage of not destroying the complex characteristics of the contact surface, but the test accuracy is very rough and the equipment price is high. At present, most companies have not introduced it into actual R&D work.

[0004] Traditional bearing rubber seal lip contact force detection equipment has complicated detection steps, is difficult to adapt to seals of different sizes, and lacks the function of applying loading force to the seal for detection. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a rubber seal lip contact force detection device for a wheel hub bearing, which solves the problems of traditional bearing rubber seal lip contact force detection equipment having complicated detection steps, difficulty in adapting to seals of different sizes, and lack of loading force on the seal for detection.

[0006] To achieve the above-mentioned purpose, the present invention provides a contact force detection device for the rubber seal lip of a wheel hub bearing, comprising a base, a support plate for supporting an external rubber seal is provided on the base, a cover plate for cooperating with the end face of the support plate to clamp and limit the external rubber seal is provided on the support plate, a bracket is provided on one side of the base, a loading member for applying a loading force to the outer edge of the cover plate so as to apply a loading force to the outer edge of the external rubber seal through the cover plate and a first detection member for working in conjunction with the loading member to detect the change in displacement of the rubber seal lip after the loading force is applied, a second detection member for detecting the force value of the cover plate is provided on the support plate, and an adjustment member for working in conjunction with the loading member to adjust the position where the loading member applies the loading force is provided on the bracket.

[0007] The advantages of adopting the above technical scheme are as follows: the operator places the rubber seal to be tested on the support plate, and then covers it with a cover plate so that the cover plate and the support plate are combined to achieve clamping and limiting of the rubber seal, wherein the outer diameter of the cover plate is smaller than the outer ring of the seal, i.e., the sealing ring, to ensure that the cover plate can be pressed into the interior of the sealing ring and contact the lip when the cover plate is covered, so that the lip can be deformed to a certain extent when the loading force is applied to the cover plate. When the cover plate is covered on the sealing ring and contacted with the lip of the sealing ring, the operator adjusts the position where the loading member applies the loading force through the adjusting member, i.e., adjusts the position where the loading member applies the loading force to the rubber seal to be tested through the cover plate, so as to ensure that the loading force can be correctly guided to the position where the seal needs to be loaded. After the adjusting member is adjusted, the operator starts the loading member so that the loading member applies the loading force to a single point on the cover plate, or applies the loading force to multiple points, or applies the loading force in a circumferential direction. When the cover plate is loaded with the loading force, the loading force will be transmitted to the seal to be tested, and the seal to be tested is placed It is placed on the support plate so that the support plate can transmit the loading force when the tested seal is deformed by the loading force, so that the second detection component can detect the force value of the cover plate and transmit the value to the external intelligent industrial control equipment so that the operator can observe and record the data in real time, and it is also convenient for the operator to adjust the detection process and detection range in real time, that is, adjust the loading force application position and the number of application points, so as to improve the detection range and detection accuracy. When the loading component applies the loading force, the first detection component can detect the change in displacement of the lip of the rubber seal after the loading force is applied, so that the operator can record and calculate the data according to the displacement, and it is also convenient to adjust the detection steps and detection range in real time according to the detection results, so as to improve the detection accuracy and detection efficiency. In the above technology, the cover plate is detachable, so that when testing sealing rings of different sizes or diameters, the cover plate of the same size or diameter as the sealing ring can be replaced to ensure that the cover plate can contact the lip inside the sealing ring when it is covered.

[0008] The present invention further provides that: the loading component includes a shell and a plurality of electric push rods, the plurality of electric push rods are evenly distributed in a circumferential direction on the periphery of the shell, the driving ends of the plurality of electric push rods are all loading ends for contacting the end surface of the cover plate, and a connecting plate is connected between the shell and the bracket.

[0009] The benefits of adopting the above technical solution are: applying a loading force to the cover plate through a plurality of electric push rods, that is, the electric push rod is started to apply a load to the end face of the cover plate through the loading end, so as to achieve the effect of applying the loading force, thereby improving the detection accuracy and the detection range, and facilitating the measurement of the contact force of the sealing lip, that is, when the loading force is applied to the cover plate, the cover plate transmits the loading force to the entire seal so that the lip of the sealing ring is compressed and deformed, thereby meeting the test requirements and test conditions for applying the loading force. In the above technology, a plurality of electric push rods are evenly distributed in an annular direction on the periphery of the shell. When the test requirement is to apply a loading force to a single point on the lip of the sealing ring, the electric push rod above the corresponding point can be started so that the output end of the electric push rod extends out and squeezes the cover plate to apply a load to the cover plate. When the test requirement is to apply a loading force to multiple points on the lip of the sealing ring, the electric push rod above the corresponding point can be started so that The output ends of multiple electric push rods extend out and squeeze the cover plate to apply load to the cover plate. When the test requirement is to apply loading force to the entire lip of the sealing ring, all electric push rods can be started, so that the output ends of all electric push rods extend out and squeeze the cover plate to apply load to the cover plate, thereby meeting the test requirements; in the above-mentioned technology, single-point, multi-point or circular loading of the lip of the sealing ring is achieved through multiple electric push rods, thereby improving the detection range and detection accuracy. The use of electric push rods is convenient for operators to start, thereby simplifying the detection process, thereby improving the detection efficiency. In the above-mentioned technology, multiple electric push rods can be communicatively connected or electrically connected to external intelligent industrial control equipment so that the operator can directly control the intelligent industrial control equipment to open and close the electric push rods; in the above-mentioned technology, the intelligent industrial control equipment and the electric push rods are both existing technologies, so their structure and function as well as the connection and communication method between the two will not be described in detail.

[0010] The present invention further provides: a hollow cavity is provided in the shell, a main gear disc is rotatably arranged in the movable cavity, a movable groove connected to the movable cavity is provided on the outer peripheral wall of the shell corresponding to each position of the electric push rod, a movable plate is slidably arranged in the movable groove, each movable plate is connected to the outer wall of the corresponding electric push rod, the adjusting member includes a plurality of transmission groups, a plurality of the transmission groups correspond to a plurality of movable grooves one by one and each transmission group is arranged in the corresponding movable groove, the transmission group is composed of a secondary gear disc and a slave gear disc, the main gear disc, the secondary gear disc and the slave gear disc are all helical gears, a plurality of the secondary gear discs are meshed with the main gear disc, each of the slave gear discs is relatively vertical and meshed with the corresponding secondary gear disc, the bottom wall of the movable plate is connected to the side wall by a smooth curved surface and a mating surface is formed, a mating tooth groove is provided on the mating surface along the length direction of the movable plate, and each of the slave gear discs is meshed with its adjacent and corresponding mating tooth groove.

[0011] The advantages of adopting the above technical scheme are as follows: the main toothed disc, auxiliary toothed disc and slave toothed disc are all helical gears, and the main toothed disc is meshed with several auxiliary toothed discs, so that when the main toothed disc rotates, it will drive several auxiliary toothed discs to rotate synchronously, and each auxiliary toothed disc is meshed with a slave toothed disc, so that when the auxiliary toothed disc rotates, it will drive the slave toothed disc to rotate, and each slave toothed disc is meshed with its corresponding matching tooth groove, so that when the slave toothed disc rotates, it will drive the movable plate to move in the movable groove along the direction of the movable groove, thereby realizing the adjustment of the distance between the electric push rod and the shell, because the rotation of the main toothed disc drives several auxiliary toothed discs to rotate synchronously, so that the distance between several electric push rods and the shell is also adjusted synchronously, and the position combination of several electric push rods is arranged in a circle, so that when the distance between several electric push rods and the shell is adjusted synchronously, the diameter of the circle formed by the combination will be adjusted, thereby ensuring that several electric push rods can cooperate with the sealing rings to be tested of different diameters or sizes, that is, cooperate with the cover plate, so as to ensure that the loading force can be normally transmitted to the cover plate, and the above technical setting is used to improve the detection range and detection accuracy, thereby improving applicability.

[0012] The present invention further provides that: the shell is penetrated by a through hole along its axial direction, the main gear disc is coaxially penetrated by a through hole corresponding to the through hole, the adjusting member also includes a rotating shaft detachably arranged in the through hole for driving the main gear disc to rotate, a first tooth groove is circumferentially opened on the inner circumferential wall of the through hole, and a second tooth groove for plugging and meshing with the first tooth groove is circumferentially opened on the outer circumferential wall of the rotating shaft.

[0013] The benefit of adopting the above technical solution is that when it is necessary to adjust the distance between the electric push rod and the housing, the operator inserts the rotating shaft into the through hole and continues to insert it into the through hole, and a second tooth groove is opened on the outer peripheral wall of the rotating shaft. When the rotating shaft is inserted into the through hole, the second tooth groove is plugged and engaged with the first tooth groove, and then the main gear disk is driven to rotate when the rotating shaft rotates, thereby realizing the adjustment of the distance between the electric push rod and the housing.

[0014] The present invention is further provided with: a plurality of limit plates are detachably provided on the end surface of the shell, the plurality of limit plates are evenly distributed on the shell in an annular direction, the limit plates are composed of a horizontal plate and a vertical plate, a plurality of limit grooves are annularly provided on the perforated inner circumferential wall, the plurality of limit plates are arranged in one-to-one correspondence with the plurality of limit grooves, each of the vertical plates is plugged into the corresponding limit groove, the radial cross-section of the limit groove is trapezoidal and the shape of the vertical plate is adapted to the shape of the limit groove, a fixing groove is provided on the end surface of the shell corresponding to each horizontal plate position, each of the horizontal plates is arranged in the corresponding fixing groove and the shape of the horizontal plate is adapted to the shape of the fixing groove, the horizontal plate and the fixing groove are coaxially provided with fixing holes, and fixing bolts are threadedly connected between the fixing holes of the horizontal plate and the fixing holes of the fixing groove.

[0015] The advantages of adopting the above technical scheme are as follows: in the above technology, after the rotating shaft is inserted into the through hole and drives the main gear disc to rotate a certain angle, the operator can pull out the rotating shaft and install the limit plate on the shell, so that the vertical plate of the limit plate is inserted into the limit groove, and the rotation of the main gear disc is limited by plugging a plurality of vertical plates into a plurality of limit grooves, and then the main gear disc is fixed after the main gear disc rotates to avoid fine-tuning or deviation from the preset position of the distance between the electric push rod and the shell; after the vertical plate is plugged into the limit groove, the operator fixes the horizontal plate in the fixing groove by screwing in the fixing bolts, and then fixes the limit plate on the shell to avoid the vertical plate from being disengaged from the limit groove, thereby realizing the positioning of the electric push rod; in the above technology, the radial cross-section of the vertical plate is adapted to the radial cross-section of the limit groove and both are arranged in a trapezoidal shape, thereby improving the plugging strength of the vertical plate and the limit groove.

[0016] The present invention is further provided that: a connecting arm is connected to the bracket, and a micrometer is provided on the connecting arm for detecting the change in displacement of the lip of the rubber seal after being loaded with a loading force. The output end of the micrometer is sequentially penetrated by a through hole and a through hole and is arranged in coaxial contact with the end face of the cover plate. The micrometer is the first detection component.

[0017] The benefits of adopting the above technical solution are: the micrometer in the above technology is used to detect the change in the displacement of the lip of the rubber seal when the rubber seal is deformed by the loading force. The micrometer is used for detection so that the operator can observe the numerical changes displayed by the micrometer in real time, which is convenient for data recording and data analysis. At the same time, the micrometer is an instrument for detecting displacement changes more accurately, and it is simple to operate and has fast data feedback, which is convenient for the operator to adjust the detection requirements and detection range according to the numerical changes. The micrometer in the above technology is a prior art, so its structure and function as well as the specific detection principle will not be described in detail.

[0018] The present invention further provides that: the second detection member includes a plurality of pressure detection sensors evenly distributed in an annular direction on the base, the detection ends of the plurality of pressure detection sensors are all arranged toward the support plate, and each detection end of the pressure detection sensor is arranged in contact with the bottom wall of the support plate.

[0019] The benefits of adopting the above technical solution are: when the seal to be tested is deformed by the loading force, the support plate will also be subjected to the loading force, so that the pressure detection sensor can detect the pressure on the support plate and transmit the detection data to the external intelligent industrial control system, which is convenient for data detection and data analysis. In the above technology, the loading force on the support plate is detected by pressure detection sensors evenly distributed in an annular direction on the base, and because the number of pressure detection sensors is large and evenly distributed, the pressure detection sensors at the corresponding positions when the seal to be tested is loaded at a single point, multiple points or annularly can detect the loading force value on the support plate, thereby improving the detection efficiency and detection range; the pressure detection sensor in the above technology is a prior art, so its structure and detection principle will not be described in detail.

[0020] The present invention is further provided that: the support disk is arranged in a disc shape, the end surface of the base is provided with a plurality of hole groups, the plurality of hole groups are arranged concentrically along the diameter direction of the support disk, each group of the hole groups is composed of a plurality of connecting holes distributed in an annular direction, and the plurality of the pressure detection sensors are threadedly connected to some of the connecting holes.

[0021] The benefits of adopting the above technical solution are: in the above technology, when the size or diameter of the seal to be detected is large, it is necessary to replace the support plate and cover plate of the same diameter or size to ensure that the combination of the two can achieve the clamping and limiting of the seal to be detected, and at the same time facilitate the cooperation between the support plate and the pressure detection sensor. When the support plate is replaced with a support plate adapted to the size of the seal to be detected, the operator screws the pressure detection sensor into several connecting holes corresponding to the outer edge position of the support plate, so that the pressure detection sensor is fixed in the connecting hole and its detection end abuts against the bottom wall of the support plate, thereby realizing accurate pressure detection, thereby improving the detection range and detection practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional view of the present invention;

[0023] Figure 2 A three-dimensional view of the housing and its connection structure in the present invention;

[0024] Figure 3 for Figure 2 3D view after removing the shell;

[0025] Figure 4 A three-dimensional view from the bottom perspective of the base in the present invention;

[0026] Figure 5 It is a simplified view of the matching state of the main gear plate and the rotating shaft in the present invention. DETAILED DESCRIPTION

[0027] The present invention provides a contact force detection device for the rubber seal lip of a wheel hub bearing, comprising a base 1, on which a support plate 11 for supporting an external rubber seal is arranged, on which a cover plate 12 for cooperating with an end surface of the support plate 11 to clamp and limit the external rubber seal is arranged, a bracket 2 is arranged on one side of the base 1, on which a loading member for applying a loading force to an outer edge of the cover plate 12 so as to apply a loading force to an outer edge of the external rubber seal through the cover plate 12 and a first detection member for working in conjunction with the loading member to detect a change in displacement of the rubber seal lip after the loading force is applied, on which a second detection member for detecting a force value of the cover plate 12 is arranged, and on which a second detection member for detecting a force value of the cover plate 12 is arranged. The present invention relates to an adjusting member for cooperating with the loading member to adjust the position where the loading member applies the loading force. The loading member comprises a shell 3 and a plurality of electric push rods 4, and the plurality of electric push rods 4 are evenly distributed around the shell 3 in a circumferential direction. The driving ends of the plurality of electric push rods 4 are loading ends 41 for contacting the end surface of the cover plate 12. A connecting plate 42 is connected between the shell 3 and the bracket 2. A living cavity is hollowed out in the shell 3, and a main gear disk 34 is rotatably arranged in the living cavity. A living groove 32 communicating with the living cavity is arranged on the outer peripheral wall of the shell 3 corresponding to each position of the electric push rod 4, and a living plate 33 is slidably arranged in the living groove 32, and each of the living plates 33 is connected to the outer wall of the corresponding electric push rod 4. The adjusting member comprises a plurality of transmission groups, and the plurality of transmission groups are connected to the outer wall of the corresponding electric push rod 4. The movable group corresponds to a plurality of movable grooves 32 one by one and each transmission group is arranged in the corresponding movable groove 32. The transmission group is composed of a secondary toothed disc 35 and a secondary toothed disc 36. The main toothed disc 34, the secondary toothed disc 35 and the secondary toothed disc 36 are all helical gears. A plurality of the secondary toothed discs 35 are meshed with the main toothed disc 34. Each of the secondary toothed discs 36 is relatively vertical and meshed with the corresponding secondary toothed discs 35. The bottom wall and the side wall of the movable plate 33 are connected by a smooth curved surface and a matching surface is formed. A matching tooth groove 331 is opened on the matching surface along the length direction of the movable plate 33. Each of the secondary toothed discs 36 is meshed with the matching tooth groove 331 adjacent to and corresponding to each other. The housing 3 is penetrated by a through hole 37 along its axial direction. The main toothed disc 34 corresponds to the through hole A through hole 341 is coaxially passed through the position 37, and the adjusting member also includes a rotating shaft 21 detachably arranged in the through hole 37 for driving the main gear disc 34 to rotate, a first tooth groove 342 is circumferentially opened on the inner peripheral wall of the through hole 341, and a second tooth groove 211 for plugging and meshing with the first tooth groove 342 is circumferentially opened on the outer peripheral wall of the rotating shaft 21, and a plurality of limit plates are detachably arranged on the end surface of the shell 3, and the plurality of limit plates are evenly distributed on the shell 3 in an annular direction, and the limit plates are composed of a horizontal plate 43 and a vertical plate 44, and a plurality of limit grooves 343 are circumferentially opened on the inner peripheral wall of the through hole 341, and the plurality of limit plates are arranged in a one-to-one correspondence with the plurality of limit grooves 343, and each of the vertical plates 44 is plugged and arranged with the corresponding limit groove 343.The radial cross section of the limit groove 343 is trapezoidal and the shape of the vertical plate 44 is adapted to the shape of the limit groove 343. A fixing groove 45 is provided on the end surface of the shell 3 corresponding to each position of the horizontal plate 43. Each of the horizontal plates 43 is arranged in the corresponding fixing groove 45 and the shape of the horizontal plate 43 is adapted to the shape of the fixing groove 45. The horizontal plate 43 and the fixing groove 45 are coaxially provided with fixing holes. The fixing holes of the horizontal plate 43 and the fixing holes of the fixing groove 45 are threadedly connected with fixing bolts 46. The bracket 2 is connected to a connecting arm 22. The connecting arm 22 is provided with a micrometer 23 for detecting the displacement change of the lip of the rubber seal after the loading force is loaded. The output end of the micrometer 23 is penetrated by through holes 37 in sequence. and the through hole 341 and are coaxially contacted with the end face of the cover plate 12. The micrometer 23 is the first detection part. The second detection part includes a plurality of pressure detection sensors 13 uniformly distributed in an annular direction on the base 1. The detection ends of the plurality of pressure detection sensors 13 are all arranged toward the support disk 11. The detection ends of each of the pressure detection sensors 13 are in contact with the bottom wall of the support disk 11. The support disk 11 is arranged in a disc shape. The end face of the base 1 is provided with a plurality of hole groups. The plurality of hole groups are concentrically arranged along the diameter direction of the support disk 11. Each group of the hole groups is composed of a plurality of connecting holes 14 distributed in an annular direction. The plurality of pressure detection sensors 13 are threadedly connected with some of the connecting holes 14. ,

[0028] The seal to be tested described in the above technology is marked as 5 in the accompanying drawings of the specification.

[0029] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A device for detecting the contact force of the rubber seal lip of a hub bearing, characterized in that: The invention comprises a base, wherein a support plate for supporting an external rubber seal is arranged on the base, and a cover plate for cooperating with an end face of the support plate to clamp and limit the external rubber seal. A bracket is arranged on one side of the base, and a loading member for applying a loading force to an outer edge of the cover plate so as to apply a loading force to an outer edge of the external rubber seal through the cover plate and a first detection member for cooperating with the loading member to detect a displacement change of a lip of the rubber seal after being loaded with the loading force. A second detection member for detecting a force value of the cover plate is arranged on the support plate, and an adjusting member for cooperating with the loading member to adjust a position where the loading member applies a loading force is arranged on the bracket. The loading member comprises a shell and a plurality of electric push rods, and the plurality of electric push rods are evenly distributed around the periphery of the shell in a circumferential direction, and the driving ends of the plurality of electric push rods are all loading ends for contacting with the end face of the cover plate. A connecting plate is connected between the shell and the bracket, and a living cavity is provided in the hollow of the shell, and a main toothed disc is rotatably provided in the living cavity, and a toothed disc is provided on the outer peripheral wall of the shell corresponding to each position of the electric push rod, which is connected to the living cavity. The movable groove is connected to the movable groove, and a movable plate is slidably arranged in the movable groove, each of the movable plates is connected to the outer wall of the corresponding electric push rod, the adjusting member includes a plurality of transmission groups, a plurality of the transmission groups correspond to a plurality of movable grooves one by one and each transmission group is arranged in the corresponding movable groove, the transmission group is composed of a secondary gear plate and a secondary gear plate, the main gear plate, the secondary gear plate and the secondary gear plate are all helical gears, a plurality of the secondary gear plates are meshed with the main gear plate, each of the secondary gear plates is relatively vertical and meshed with the corresponding secondary gear plates, and the bottom wall of the movable plate and the side wall are arranged between It is connected in a smooth curved surface and forms a mating surface, and a mating tooth groove is provided on the mating surface along the length direction of the movable plate, and each of the slave tooth discs is meshed with its adjacent and corresponding mating tooth groove, and the shell is penetrated by a through hole along its axial direction, and the main tooth disc is coaxially penetrated by a through hole corresponding to the through hole position, and the adjusting member also includes a rotating shaft detachably arranged in the through hole for driving the main tooth disc to rotate, a first tooth groove is circumferentially provided on the inner circumferential wall of the through hole, and a second tooth groove for mating and meshing with the first tooth groove is circumferentially provided on the outer circumferential wall of the rotating shaft.

2. The device for detecting the contact force of the rubber seal lip of a hub bearing according to claim 1, characterized in that: A plurality of limit plates are detachably provided on the end surface of the shell, and the limit plates are evenly distributed on the shell in a circumferential direction. The limit plates are composed of a horizontal plate and a vertical plate. A plurality of limit grooves are circumferentially provided on the inner peripheral wall of the perforation. The limit plates are arranged in a one-to-one correspondence with the limit grooves, and each of the vertical plates is plugged into the corresponding limit groove. The radial cross-section of the limit groove is trapezoidal and the shape of the vertical plate is matched with the shape of the limit groove. A fixing groove is provided on the end surface of the shell corresponding to each horizontal plate position, and each horizontal plate is arranged in the corresponding fixing groove and the shape of the horizontal plate is matched with the shape of the fixing groove. The horizontal plate and the fixing groove are coaxially provided with fixing holes, and fixing bolts are threadedly connected between the fixing holes of the horizontal plate and the fixing holes of the fixing groove.

3. The device for detecting the contact force of the rubber seal lip of a hub bearing according to claim 1, characterized in that: The bracket is connected to a connecting arm, on which a micrometer is provided for detecting the displacement change of the lip of the rubber seal after being loaded with a loading force. The output end of the micrometer is sequentially penetrated by a through hole and a through hole and is coaxially contacted with the end face of the cover plate. The micrometer is the first detection component.

4. The device for detecting the contact force of the rubber seal lip of a hub bearing according to claim 1, characterized in that: The second detection member includes a plurality of pressure detection sensors uniformly distributed in an annular direction on the base, the detection ends of the plurality of pressure detection sensors are all arranged toward the support plate, and each detection end of the pressure detection sensor is arranged in contact with the bottom wall of the support plate.

5. The device for detecting the contact force of the rubber seal lip of a hub bearing according to claim 4, characterized in that: The support disk is arranged in a disc shape, and a plurality of hole groups are opened on the end surface of the base. The plurality of hole groups are arranged concentrically along the diameter direction of the support disk, and each group of the hole groups is composed of a plurality of connecting holes distributed in an annular direction. The plurality of pressure detection sensors are threadedly connected to some of the connecting holes.

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