Universal joint device, transmission system and vehicle

Abstract

The utility model discloses a universal joint device, a transmission system and a vehicle, and belongs to the technical field of automobiles, the universal joint device comprises a universal joint body and a shell, a containing cavity is formed in the shell, and the universal joint body is arranged in the containing cavity; the shell is provided with an exhaust hole, the exhaust hole is located at the axis of the shell, and the containing cavity is directly communicated with the outside of the shell through the exhaust hole. According to the universal joint device, the exhaust hole is formed in the shell, the containing cavity is directly communicated with the external environment through the exhaust hole, so that internal gas can be exhausted through the exhaust hole in time at the high temperature, and abrasion between the expansion sleeve and peripheral components caused by the expansion sleeve is avoided; according to the universal joint device, grease in the containing cavity can be prevented from being gathered at the exhaust hole in the working process and leaking out, normal use of the universal joint device is guaranteed, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a universal joint device, a transmission system and a vehicle. BACKGROUND

[0002] A universal joint is a mechanical part that realizes variable-angle power transmission, mainly used to change the direction of the axis of the transmission shaft. It is the "joint" part of the automobile transmission system, allowing the included angle between the connected parts to change within a certain range to adapt to the angle changes caused by steering and up-and-down bouncing during automobile driving. The universal joint is an important component in the vehicle transmission system. Damage to the universal joint can cause a decrease in power transmission efficiency, affecting the driving performance of the vehicle. It can also cause abnormal vibration and noise during driving, reducing the driving stability and safety of the vehicle and affecting the driving experience.

[0003] Currently, the universal joint is a completely sealed structure. High-speed and high-torsion operation of the universal joint can cause the internal temperature to rise and the air pressure to increase, causing the rubber sheath to be inflated by the air pressure, resulting in an increase in the turning radius of the universal joint during rotation, causing wear with the surrounding components and affecting the service life of the universal joint. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a universal joint device, a transmission system and a vehicle, aiming to solve the problem of internal air pressure being unable to be discharged during high-speed operation of the universal joint in the prior art, affecting the service life.

[0005] The present application provides a universal joint device, comprising: a universal joint body and a shell, an accommodation cavity is formed in the interior of the shell, and the universal joint body is arranged in the accommodation cavity; an exhaust hole is arranged on the shell, the exhaust hole is located at the axis of the shell, and the exhaust hole directly communicates the accommodation cavity with the outside of the shell.

[0006] Through the above technical solution, the exhaust hole is arranged on the shell, which can directly communicate the interior of the shell with the outside, so as to timely discharge the internal gas for pressure relief at high temperature. The exhaust hole is located at the axis of the shell, which can prevent the internal grease from being squeezed out of the exhaust hole to cause leakage during high-speed torsion, ensuring the normal use of the universal joint device and prolonging the service life.

[0007] Optionally, the diameter of the exhaust hole is less than or equal to 0.2mm.

[0008] Through the above technical solution, the diameter of the exhaust hole is set to be small, which can ensure the ventilation effect while preventing grease leakage, without affecting the normal work of the universal joint device.

[0009] Optionally, the housing includes a first shell and a second shell arranged coaxially, one end of the first shell is connected to the transmission shaft, the other end of the first shell is connected to the second shell, and the exhaust hole is provided on the second shell.

[0010] Through the above technical solution, the exhaust hole is set in the second shell, which can avoid the inconvenience caused by drilling a hole on the transmission shaft and is more convenient for processing.

[0011] Optionally, a first through hole is opened at the axis of the second shell, and the first through hole is used to form the exhaust hole.

[0012] Optionally, a second through hole is opened at the axis of the second shell, a flow limiting member is arranged in the second through hole, a third through hole is opened at the center of the flow limiting member, and the third through hole is used to form the exhaust hole.

[0013] Optionally, a filter is provided at the exhaust hole, and the filter is located on a side of the exhaust hole facing the accommodating cavity.

[0014] Through the above technical solution, by adding a filter on the side of the exhaust hole facing the accommodating chamber, it is possible to further prevent the internal grease from leaking out, and it is also possible to prevent external water or oil from entering the accommodating chamber when the temperature drops, thereby further ensuring the normal operation of the universal joint device.

[0015] Optionally, the mesh diameter of the filter is less than or equal to 0.025 mm.

[0016] Through the above technical solution, the mesh diameter of the filter is set to be smaller, which can further improve the blocking effect.

[0017] Optionally, a slot is provided on a side of the flow limiting member facing the accommodating cavity, and the filter is installed in the slot.

[0018] Through the above technical solution, the filter is arranged on the flow limiting component and is fixed by cooperating with the card slot, and the installation is convenient and flexible.

[0019] Beneficial effects:

[0020] 1. The universal joint device described in this application comprises a universal joint body and a housing. The housing has an interior formed with a receiving cavity, and the universal joint body is disposed within the receiving cavity. The housing is provided with an exhaust hole, located at the axis of the housing, which directly connects the receiving cavity with the exterior of the housing. The exhaust hole in the housing allows the interior of the housing to communicate with the exterior, allowing for timely exhaust of internal air pressure at high temperatures. The location of the exhaust hole at the axis of the housing prevents internal grease from accumulating at the exhaust hole during operation and causing leakage, thereby ensuring the normal operation of the universal joint device and extending its service life.

[0021] 2. The gimbal device described in the application is provided with a filter screen at the exhaust hole, and the filter screen is located at the side of the exhaust hole facing the accommodating cavity. By arranging the filter screen, the oil in the accommodating cavity can be blocked to a certain extent, further preventing the oil from leaking out of the exhaust hole, avoiding the loss of oil affecting the lubrication of the gimbal device. On the other hand, when the temperature decreases, the filter screen can further block the water or oil from the outside into the accommodating cavity, thereby ensuring the normal operation of the gimbal device.

[0022] The application also provides a transmission system comprising the gimbal device as described above.

[0023] Compared with the prior art, the transmission system has the gimbal device described above, so that the energy loss in the power transmission process is less, the transmission efficiency is higher, and the abnormal sound and vibration of the transmission shaft can be reduced, thereby ensuring the stability and safety of vehicle driving and helping to prolong the service life of the vehicle.

[0024] The application provides a vehicle comprising the gimbal device or the transmission system as described above.

[0025] The vehicle has the same advantages as the transmission system and the gimbal device described above relative to the prior art, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the description of the embodiments of the application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 is a structural schematic diagram of the gimbal device according to an embodiment of the application;

[0028] Figure 2 is a partial enlarged schematic diagram of A in the application; Figure 1

[0029] Figure 3 is a structural schematic diagram of the gimbal device according to another embodiment of the application;

[0030] Figure 4 is a partial enlarged schematic diagram of B in the application. Figure 3

[0031] Explanation of reference signs:

[0032] ​​1. housing; 11. first housing; 12. second housing; 120. first through hole; 121. second through hole; 2. universal joint body; 3. flow limiting piece; 31. third through hole; 4. filter screen; 5. spline shaft; 6. rubber sheath. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0034] In the related art, a universal joint is a mechanical part for realizing variable-angle power transmission, mainly used for changing the position of the axis direction of a transmission shaft. It is the "joint" part in the transmission system of an automobile, allowing the included angle between the connected parts to change within a certain range to adapt to the angle change caused by steering and up-and-down bouncing during automobile driving. The universal joint is an important part in the transmission system of a vehicle. Damage to the universal joint will cause the power transmission efficiency to decrease, affecting the driving performance of the vehicle. At the same time, it will also cause abnormal vibration and noise during driving, reducing the driving stability and safety of the vehicle and affecting the driving experience.

[0035] At present, the universal joint is a completely sealed structure. High-speed and high-torque operation of the universal joint during operation will cause the internal temperature to rise and the air pressure to increase, causing the rubber sheath to be inflated by the air pressure, resulting in an increase in the turning radius of the universal joint during rotation, causing wear with the surrounding parts and affecting the service life of the universal joint.

[0036] Therefore, the embodiments of the present application propose a universal joint device.

[0037] Referring to Figure 1 A universal joint device includes a universal joint body 2 and a housing 1. The inside of the housing 1 is formed with a receiving cavity, and the universal joint body 2 is arranged in the receiving cavity. An exhaust hole is arranged on the housing 1, and the exhaust hole is located at the axis center of the housing 1. The exhaust hole directly communicates the receiving cavity with the outside of the housing 1.

[0038] Specifically, the universal joint device includes a universal joint body 2 and a housing 1. The housing 1 has an interior formed with a housing cavity. The universal joint body 2 is mounted in the housing cavity via a retaining frame. A drive shaft is connected to one end of the housing 1. One end of the drive shaft penetrates the housing 1 and enters the housing cavity to connect with the universal joint. A rubber sheath 6 is provided between the drive shaft and the housing 1 for sealing. When the universal joint device is in operation, the drive shaft, the universal joint body 2, and the housing 1 rotate synchronously. As the universal joint device operates at high speed and high torque, the temperature and air pressure in the housing cavity rise. Because the housing 1 is provided with an exhaust hole at the axis, and the exhaust hole directly connects the housing cavity with the external environment, the gas in the housing cavity can be discharged promptly through the exhaust hole, achieving pressure relief. This prevents the rubber sheath 6 from deforming and swelling due to the high pressure in the housing cavity, which would increase the turning radius and cause wear on the surrounding area. This ensures the normal operation of the universal joint device and helps extend its service life.

[0039] On the other hand, grease is usually added to the accommodating cavity. The grease can play a role of lubrication and protection, reduce the friction of the internal moving parts, ensure their smooth operation, reduce the heat and wear caused by friction, and reduce the noise and vibration generated by the universal joint device during operation. When the universal joint device is running at high speed and high torque, the grease will flow to the edge of the shell 1 and gather under the action of centrifugal force. In this embodiment, the exhaust hole is set at the axis of the shell 1. Compared with setting it at the periphery, it can effectively prevent grease from gathering at the exhaust hole at the axis, thereby preventing grease from being squeezed out of the exhaust hole to the outside during pressure relief. It can ensure smooth exhaust while avoiding the loss of internal grease, further ensuring the normal operation of the universal joint device and effectively improving its service life.

[0040] Optionally, the diameter of the exhaust hole is less than or equal to 0.2 mm.

[0041] Specifically, since the vent directly connects the accommodating chamber to the exterior of the housing 1, the diameter of the vent cannot be set too large to prevent grease in the accommodating chamber from leaking directly through the vent. Preferably, in this embodiment, the diameter of the vent is set to be less than or equal to 0.2 mm, which ensures ventilation while preventing grease leakage and does not affect the normal operation of the universal joint device.

[0042] Optionally, the housing 1 includes a first shell 11 and a second shell 12 arranged coaxially, one end of the first shell 11 is connected to the transmission shaft, the other end of the first shell 11 is connected to the second shell 12, and the exhaust hole is provided on the second shell 12.

[0043] For details, see Figure 1In this embodiment, the housing 1 of the universal joint assembly comprises two parts: a first housing 11 and a second housing 12. The first housing 11 is located on the outer layer and is open at both ends. The left open end of the first housing 11 has a smaller diameter and is used to connect to the drive shaft, which is connected to the vehicle's front final drive unit, which in turn connects to the left and right drive shafts, which in turn connect to the wheels. The right open end of the first housing 11 has a larger diameter and is used to connect to the second housing 12. The second housing 12 is coaxially arranged with the first housing 11 and is pressed into the first housing 11 via an interference fit to seal the right open end of the first housing 11. The space between the first and second housings 11, 12, forms the aforementioned accommodating chamber. To further facilitate the connection of the drive shaft, a spline shaft 5 is provided on the left side of the first housing 11. One end of the spline shaft 5 is connected to the drive shaft, and the other end extends from the left open end into the accommodating chamber to connect to the universal joint body 2. The spline shaft 5 and the first housing 11 are connected and sealed by a rubber boot 6. Since the left side of the shell 1 needs to be connected to the spline shaft 5 and the transmission shaft, for the convenience of layout, the exhaust hole is set on the right side of the shell 1 in this embodiment, specifically at the axis center of the second shell 12, to avoid the inconvenience caused by opening holes on the spline shaft 5 and the transmission shaft.

[0044] Optionally, a first through hole 120 is opened at the axis of the second shell 12 , and the first through hole 120 is used to form the exhaust hole.

[0045] In an optional embodiment, the exhaust hole can be directly drilled on the second shell 12. For details, see Figure 1 and Figure 2 A first through hole 120 of a required size is opened axially at the axis center of the second shell 12 , and the first through hole 120 is directly used as an exhaust hole.

[0046] Optionally, a second through hole 121 is opened at the axis of the second shell 12 , a flow limiting member 3 is arranged in the second through hole 121 , a third through hole 31 is opened at the center of the flow limiting member 3 , and the third through hole 31 is used to form the exhaust hole.

[0047] In another optional embodiment, an additional flow limiting member 3 may be installed on the second shell 12, and the exhaust hole is opened on the flow limiting member 3, and the exhaust hole is kept in communication with the accommodating cavity and the external environment of the shell 1. Figure 3 and Figure 4 A second through hole 121 is opened at the axis center of the second shell 12. The size of the second through hole 121 is adapted to the flow limiting member 3. A third through hole 31 is opened in the center of the flow limiting member 3. The third through hole 31 is used as an exhaust hole to directly connect the accommodating cavity with the outside of the shell 1.

[0048] As an example, the second through hole 121 can be arranged as a horizontally arranged cylindrical stepped hole, and the flow limiting piece 3 can be arranged as a circular shaft. During installation, the flow limiting piece 3 is placed into the large hole section of the stepped hole and is in clamping connection with the stepped hole, and the end surface of the flow limiting piece 3 abuts against the stepped surface of the stepped hole, so as to realize the installation and fixation of the flow limiting piece 3 in the second shell 12.

[0049] Optionally, the flow limiting piece 3 and the second shell 12 can also be detachably connected in a threaded connection manner or the like, and the assembly is very convenient and flexible.

[0050] Further, the filter screen 4 is arranged at the exhaust hole and is located at the side of the exhaust hole facing the accommodating cavity.

[0051] Further, the filter screen 4 is arranged at the exhaust hole and is located at the side of the exhaust hole facing the accommodating cavity, which can further block the grease in the accommodating cavity, so as to avoid the influence of the continuous reduction of the grease leakage on the lubrication of the universal joint device. On the other hand, when the temperature decreases, the filter screen 4 can further block the water or oil from the outside into the accommodating cavity, so as to ensure the normal work of the universal joint device.

[0052] Optionally, the mesh diameter of the filter screen 4 is less than or equal to 0.025 mm.

[0053] In order to ensure the blocking effect, the mesh diameter of the filter screen 4 should not be too large. As preferred, in the embodiment, the mesh diameter of the filter screen 4 is set to be less than or equal to 0.025 mm, which is smaller than the diameter of the exhaust hole. In this way, the ventilation demand is met, and the blocking ability to the internal grease and the water or oil from the outside is further improved.

[0054] Optionally, a clamping groove is arranged at the side of the flow limiting piece 3 facing the accommodating cavity, and the filter screen 4 is installed in the clamping groove.

[0055] In order to further facilitate the installation of the filter screen 4, a clamping groove is arranged at the side of the flow limiting piece 3 facing the accommodating cavity, as shown in FIG. 6, the size of the clamping groove is matched with the filter screen 4, and the filter screen 4 is fixed by clamping connection with the clamping groove. Figure 2 When the filter screen 4 needs to be dismounted or replaced, the flow limiting piece 3 is dismounted from the second shell 12, and then the filter screen 4 is taken out from the clamping groove, so the operation is very convenient.

[0056] The universal joint device provided by the embodiment has a simple structure. On one hand, the internal gas can be discharged in time to release pressure at high temperature, and the internal grease is not easy to flow out, which is beneficial to reduce the abrasion and improve the working performance of the universal joint device. On the other hand, the water or oil from the outside cannot enter the internal device at low temperature, so the normal operation of the device is ensured, and the service life is prolonged.

[0057] An embodiment of the present application also provides a transmission system, comprising the universal joint device as described above.

[0058] Compared with the existing technology, the transmission system has less energy loss during power transmission and higher transmission efficiency due to the above-mentioned universal joint device. At the same time, it can reduce abnormal noise and vibration of the drive shaft, ensure the stability and safety of the vehicle's driving, and help extend the service life of the vehicle.

[0059] An embodiment of the present application provides a vehicle, comprising the universal joint device or transmission system as described above.

[0060] The advantages of the vehicle, the transmission system and the universal joint device described above over the prior art are the same and will not be elaborated here.

[0061] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0062] It should also be noted that, in this article, the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the terms "include", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or terminal device that includes the element.

[0063] The technical solutions provided by this application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of this application. The description of the above embodiments is only intended to help understand this application, and the contents of this specification should not be construed as limiting this application. At the same time, for those skilled in the art, according to this application, there may be various changes in the specific implementation methods and application scopes. It is not necessary and impossible to list all implementation methods here, and obvious changes or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A universal joint device, characterized in that: include: A universal joint body (2) and a housing (1), wherein an accommodating cavity is formed inside the housing (1), and the universal joint body (2) is arranged in the accommodating cavity; The housing (1) is provided with an exhaust hole, the exhaust hole being located at the axis of the housing (1), and the exhaust hole directly connects the accommodating cavity with the outside of the housing (1); The housing (1) comprises a first shell (11) and a second shell (12) arranged coaxially, one end of the first shell (11) is connected to a transmission shaft, the other end of the first shell (11) is connected to the second shell (12), and the exhaust hole is provided on the second shell (12).

2. The universal joint device according to claim 1, characterized in that: The diameter of the exhaust hole is less than or equal to 0.2 mm.

3. The universal joint device according to claim 1, characterized in that: A first through hole (120) is provided at the axis of the second shell (12), and the first through hole (120) is used to form the exhaust hole.

4. The universal joint device according to claim 1, characterized in that: A second through hole (121) is provided at the axis of the second shell (12), a flow limiting member (3) is provided in the second through hole (121), a third through hole (31) is provided at the center of the flow limiting member (3), and the third through hole (31) is used to form the exhaust hole.

5. The universal joint device according to claim 4, characterized in that: A filter screen (4) is provided at the exhaust hole, and the filter screen (4) is located on a side of the exhaust hole facing the accommodating cavity.

6. The universal joint device according to claim 5, characterized in that: The mesh diameter of the filter (4) is less than or equal to 0.025 mm.

7. The universal joint device according to claim 5, characterized in that: The flow limiting member (3) is provided with a slot on one side facing the accommodating cavity, and the filter screen (4) is installed in the slot.

8. A transmission system, characterized in that: The invention comprises a universal joint device as claimed in any one of claims 1 to 7.

9. A vehicle, characterized in that: The method comprises the universal joint device according to any one of claims 1 to 7, or the transmission system according to claim 8.

Images