Transmission mechanism and vehicle

Abstract

The embodiment of the utility model discloses a transmission mechanism and a vehicle, the transmission mechanism comprises a first transmission shaft and a second transmission shaft, and the first transmission shaft is provided with a connecting hole; the second transmission shaft comprises a transmission section and a connecting section, the connecting section is inserted into the connecting hole in a sliding mode, the second transmission shaft is provided with an oil storage cavity and an oil guide hole communicated with the oil storage cavity and the peripheral wall of the connecting section, and an opening of the connecting hole is connected with the transmission section in a sliding and sealing mode; the transmission mechanism in the embodiment of the utility model can realize self-lubrication so as to reduce the abrasion probability of the transmission mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of transmission shaft lubrication, and in particular to a transmission mechanism and a vehicle. Background Art

[0002] A car must use a drive shaft to transmit torque in its power transmission system. Therefore, the drive shaft is an important component for transmitting power in the car's transmission system. The drive shaft is generally a high-speed rotating body, so the two interconnected drive shafts need to absorb the axial movement generated by the drive shaft to ensure the dynamic balance of the drive shaft.

[0003] However, in the prior art, the transmission shaft is lubricated by adding lubricating oil to the telescopic sleeve through a refueling nozzle during use, and the lubricating oil is added again when it is insufficient. This method easily leads to insufficient lubricating oil and causes wear of the transmission shaft. Utility Model Content

[0004] Embodiments of the present application provide a transmission mechanism and a vehicle, which can achieve self-lubrication to reduce the probability of wear of the transmission mechanism.

[0005] The transmission mechanism includes a first transmission shaft and a second transmission shaft, the first transmission shaft has a connecting hole; the second transmission shaft includes a transmission section and a connecting section, the connecting section is slidably inserted into the connecting hole, the second transmission shaft has an oil storage chamber and an oil guide hole connecting the oil storage chamber and the peripheral wall of the connecting section, and the opening of the connecting hole is slidably and sealedly connected to the transmission section.

[0006] Based on the transmission mechanism of the embodiment of the present application, the first transmission shaft and the second transmission shaft are connected to each other through a connecting section and a connecting hole. The connecting section and the connecting hole limit the circumferential rotation of the first transmission shaft relative to the second transmission shaft, and allow the first transmission shaft to move axially relative to the second transmission shaft. When the first transmission shaft and the second transmission shaft rotate, the grease in the oil storage chamber gradually moves along the oil guide hole to the gap between the connecting section and the connecting hole under the action of centrifugal force, so as to lubricate the axial movement of the first transmission shaft relative to the second transmission shaft, thereby realizing self-lubrication of the transmission mechanism and reducing the probability of wear of the transmission mechanism.

[0007] In some embodiments of the present application, the connecting section can slide in the connecting hole between a first position away from the first transmission shaft and a second position close to the first transmission shaft, and a safety gap is formed between the connecting section and the bottom wall of the connecting hole when in the second position.

[0008] Based on the above embodiment, as more and more grease accumulates in the gap between the connecting section and the connecting hole, the subsequent grease forces the grease that first enters between the connecting section and the connecting hole to move along the axial direction of the connecting section, and part of the grease enters the safety gap between the connecting section and the bottom wall of the connecting hole. When the first transmission shaft moves axially relative to the second transmission shaft, the grease in the safety gap is squeezed by the bottom wall of the connecting hole through the oil return port and returns to the oil storage chamber.

[0009] In some embodiments of the present application, the oil guide hole is provided in the connecting section and extends radially along the connecting section.

[0010] Based on the above embodiment, since only the connecting section and the connecting hole are slidably connected along the axial direction of the first transmission shaft, that is, only lubrication is required between the connecting section and the connecting hole, the oil guide hole is arranged along the radial direction of the connecting section, so that the centrifugal force during the rotation of the first transmission shaft and the second transmission shaft can fully act on the grease, thereby facilitating the movement of the grease in the oil storage chamber in the oil guide hole under the action of centrifugal force.

[0011] In some embodiments of the present application, there are multiple groups of oil guide holes, and the multiple groups of oil guide holes are distributed along the circumference of the connecting section. The multiple oil guide holes in each group of oil guide holes are arranged along the axial direction of the connecting section.

[0012] Based on the above embodiment, multiple groups of oil guide holes are distributed along the circumference of the connecting section, and each group of oil guide holes is distributed along the axial direction of the connecting section, so that the grease can reach any position on the circumferential wall of the connecting section, and the grease can quickly fill the gap between the connecting section and the hole wall of the connecting hole.

[0013] In some embodiments of the present application, the oil storage chamber includes an oil storage section and a recovery section that are interconnected. The recovery section forms an oil return hole on the end face of the second transmission shaft close to the first transmission shaft, and the diameter of the recovery section gradually increases from the end away from the first transmission shaft to the end close to the first transmission shaft.

[0014] Based on the above embodiment, the diameter of the recovery section gradually increases from one end away from the first transmission shaft to the end close to the first transmission shaft, that is, the diameter of the oil return hole is the largest. This is conducive to the grease in the safety gap to flow back to the oil storage chamber through the oil return port.

[0015] In some embodiments of the present application, the oil storage section is configured as a cylindrical cavity, and the recovery section is configured as a truncated cone cavity.

[0016] Based on the above embodiment, according to the centrifugal force calculation formula F=mv2 / r (wherein m represents the mass of the object, v represents the speed of the object, and r represents the distance from the object to the center of rotation), the cylindrical oil storage section causes the grease in the oil storage section to be subjected to the same centrifugal force, thereby ensuring that the grease can be evenly distributed to each oil guide hole in the oil storage chamber.

[0017] In some embodiments of the present application, the connecting section is provided with a plurality of first meshing teeth, the plurality of first meshing teeth are arranged along the circumference of the connecting section, a plurality of second meshing teeth are provided in the connecting hole, the plurality of second meshing teeth are arranged along the circumference of the first transmission shaft, and the plurality of first meshing teeth and the plurality of second meshing teeth are engaged with each other.

[0018] Based on the above embodiment, the first transmission shaft and the second transmission shaft limit the rotation of the first transmission shaft relative to the second transmission shaft along the circumferential direction of the first transmission shaft through the first meshing teeth and the second meshing teeth, while allowing the first transmission shaft to move relative to the second transmission shaft along the axial direction of the first transmission shaft.

[0019] In some embodiments of the present application, the oil guide hole is connected to the tooth bottom of the adjacent first meshing tooth; or, the oil guide hole is connected to the tooth top of the first meshing tooth.

[0020] Based on the above embodiment, when the oil guide hole is connected to the tooth bottom of the adjacent first meshing tooth, the first meshing tooth has higher strength, and the grease can reach the gap between the tooth top of the second meshing tooth and the tooth bottom of the first meshing tooth through a shorter path; when the oil guide hole is connected to the tooth top of the first meshing tooth, the grease can directly reach the gap between the tooth top of the first meshing tooth and the tooth bottom of the second meshing tooth.

[0021] In some embodiments of the present application, the transmission mechanism further includes an oil seal, which is sealingly sleeved on the second transmission shaft and can slide relative to the second transmission shaft. The oil seal is installed at the end of the first transmission shaft to seal the opening of the connecting hole.

[0022] Based on the above embodiment, when the first transmission shaft moves relative to the second transmission shaft along the axial direction of the first transmission shaft, the oil seal moves with the first transmission shaft relative to the second transmission shaft, and the oil seal seals the opening of the connecting hole and the gap between the connecting hole and the transmission section to prevent grease from overflowing from the opening of the connecting hole.

[0023] In a second aspect, an embodiment of the present application provides a vehicle, which includes the transmission mechanism as described above.

[0024] Based on the vehicle of the embodiment of the present application, the vehicle has the above-mentioned transmission mechanism, which reduces the number of times the vehicle needs to add grease. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic cross-sectional view of a transmission mechanism in one embodiment of the present application.

[0027] Figure numerals: 10, first transmission shaft; 11, connecting hole; 20, second transmission shaft; 21, transmission section; 22, connecting section; 23, oil storage chamber; 231, oil storage section; 232, recovery section; 24, oil guide hole; 25, oil return port; 30, oil seal. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0029] A car must use a drive shaft to transmit torque in its power transmission system. Therefore, the drive shaft is an important component for transmitting power in the car's transmission system. The drive shaft is generally a high-speed rotating body, so the two interconnected drive shafts need to absorb the axial movement generated by the drive shaft to ensure the dynamic balance of the drive shaft.

[0030] However, in the prior art, the transmission shaft is lubricated by adding lubricating oil to the telescopic sleeve through a refueling nozzle during use, and the lubricating oil is added again when it is insufficient. This method easily leads to insufficient lubricating oil and causes wear of the transmission shaft.

[0031] Please refer to Figure 1 As shown, an embodiment of the present application provides a transmission mechanism, which includes a first transmission shaft 10 and a second transmission shaft 20. The first transmission shaft 10 has a connecting hole 11; the second transmission shaft 20 includes a transmission section 21 and a connecting section 22, and the connecting section 22 is slidably inserted into the connecting hole 11. The second transmission shaft 20 has an oil storage chamber 23 and an oil guide hole 24 connecting the oil storage chamber 23 and the peripheral wall of the connecting section 22. The opening of the connecting hole 11 is slidably and sealedly connected to the transmission section 21.

[0032] It is understood that the first transmission shaft 10 and the second transmission shaft 20 are coaxially connected via the connecting section 22 and the connecting hole 11. The connecting hole 11 is necessarily connected to the end face of the first transmission shaft 10 near the second transmission shaft 20, that is, the connecting hole 11 forms a connection opening on the end face of the first transmission shaft 10 near the second transmission shaft 20. The connecting section 22 is formed as the portion of the second transmission shaft 20 near one end of the first transmission shaft 10. In the embodiment of the present application, the length of the connecting section 22 can be arbitrarily set according to different application scenarios of the transmission mechanism. Similarly, the length of the connecting hole 11 can be arbitrarily set according to different application scenarios of the transmission mechanism.

[0033] It can be understood that the oil storage chamber 23 in the embodiment of the present application is more suitable for storing grease rather than liquid lubricating oil. Grease is a semi-solid lubricant, usually composed of base oil, thickener and various additives; the lower fluidity of grease facilitates its storage in the oil storage chamber 23, and can also provide good lubrication between the first transmission shaft 10 and the second transmission shaft 20 under the action of the high-speed rotating transmission mechanism.

[0034] Based on the transmission mechanism of the embodiment of the present application, the first transmission shaft 10 and the second transmission shaft 20 are connected to each other through the connecting section 22 and the connecting hole 11. The connecting section 22 and the connecting hole 11 limit the circumferential rotation of the first transmission shaft 10 relative to the second transmission shaft 20, and allow the first transmission shaft 10 to move axially relative to the second transmission shaft 20. When the first transmission shaft 10 and the second transmission shaft 20 rotate, the grease in the oil storage chamber 23 gradually moves along the oil guide hole 24 to the gap between the connecting section 22 and the connecting hole 11 under the action of centrifugal force, so as to lubricate the axial movement of the first transmission shaft 10 relative to the second transmission shaft 20.

[0035] Please refer to Figure 1 As shown, in some embodiments of the present application, the connecting section 22 can slide in the connecting hole 11 between a first position away from the first transmission shaft 10 and a second position close to the first transmission shaft 10. When the connecting section 22 is in the second position, there is a safety gap between the end face of the connecting section 22 away from the transmission section and the bottom wall of the connecting hole 11.

[0036] It is understood that when the connecting section 22 is in the second position, a safety gap exists between the end face of the connecting section 22 that is away from the transmission section and the bottom wall of the connecting hole 11. Therefore, when the connecting section 22 is in any other position, a larger gap exists between the connecting section 22 and the bottom wall of the connecting hole 11. The safety gap serves to prevent the transmission mechanism from absorbing axial movement of the first transmission shaft 10 relative to the second transmission shaft 20 if the connecting section 22 contacts the bottom wall of the connecting hole 11 away from the transmission section 21.

[0037] As more and more grease accumulates in the gap between the connecting section 22 and the connecting hole 11, the subsequent grease forces the grease that first enters between the connecting section 22 and the connecting hole 11 to move along the axial direction of the connecting section 22 (the axial direction of the connecting section 22 is bidirectional), and part of the grease enters the safety gap between the connecting section 22 and the bottom wall of the connecting hole 11. When the first transmission shaft 10 moves axially relative to the second transmission shaft 20, the grease in the safety gap is squeezed by the bottom wall of the connecting hole 11 through the oil return port 25 and returns to the oil storage chamber 23; part of the grease moves to the opening of the connecting hole 11, but since the opening of the connecting hole 11 is slidingly sealed with the transmission section 21, this part of the grease will be forced to stop moving, thereby realizing self-lubrication of the transmission mechanism to reduce the probability of wear of the transmission mechanism.

[0038] Please refer to Figure 1 As shown, in some embodiments of the present application, an oil guide hole 24 is provided in the connecting section 22 and extends radially along the connecting section 22. The oil guide hole 24 is provided radially along the connecting section 22, so that when the centrifugal force of the first transmission shaft 10 and the second transmission shaft 20 rotates, the grease is only subjected to friction between the oil guide hole 24 and the oil guide hole 24, thereby facilitating the movement of the grease in the oil storage chamber 23 within the oil guide hole 24 under the action of centrifugal force. Furthermore, the oil guide hole 24 needs to be provided along the second transmission shaft 20 and needs to communicate with the peripheral wall of the connecting section 22. In this case, providing the oil guide hole 24 radially along the connecting section 22 is most convenient for machining the oil guide hole 24. Placing the oil guide hole 24 in the connecting section 22 facilitates machining of the oil guide hole 24 and reduces the difficulty of machining the second transmission shaft 20.

[0039] In some embodiments of the present application, the number of oil guide holes 24 is multiple groups, and the multiple groups of oil guide holes 24 are distributed along the circumference of the connecting section 22. The multiple oil guide holes 24 in each group of oil guide holes 24 are arranged along the axial direction of the connecting section 22. The multiple groups of oil guide holes 24 are distributed along the circumference of the connecting section 22, and the oil guide holes 24 in each group are distributed along the axial direction of the connecting section 22. This allows the grease to reach any position on the circumferential wall of the connecting section 22, allowing the grease to reach any position on the connecting section 22 and quickly fill the gap between the connecting section 22 and the wall of the connecting hole 11.

[0040] Please refer to Figure 1As shown, in some embodiments of the present application, the oil storage chamber 23 includes an interconnected oil storage section 231 and a recovery section 232. The recovery section 232 forms an oil return hole on the end surface of the second transmission shaft 20 near the first transmission shaft 10. The diameter of the recovery section 232 gradually increases from the end away from the first transmission shaft 10 to the end near the first transmission shaft 10. The diameter of the recovery section 232 gradually increases from the end away from the first transmission shaft 10 to the end near the first transmission shaft 10, that is, the diameter of the oil return hole is the largest. This facilitates the return of grease in the safety gap to the oil return port 25 into the oil storage chamber 23.

[0041] Please refer to Figure 1 As shown, in some embodiments of the present application, the oil storage section 231 is configured as a cylindrical cavity, and the recovery section 232 is configured as a truncated cone-shaped cavity. According to the centrifugal force calculation formula F=mv2 / r (wherein m represents the mass of the object, v represents the speed of the object, and r represents the distance from the object to the center of rotation), the cylindrical oil storage section 231 makes the centrifugal force on the grease in the oil storage section 231 the same, so as to ensure that the grease can be evenly distributed to each oil guide hole 24 in the oil storage cavity 23.

[0042] In some embodiments of the present application, the connecting section 22 is provided with a plurality of first meshing teeth, and the plurality of first meshing teeth are arranged along the circumference of the connecting section 22. A plurality of second meshing teeth are provided in the connecting hole 11, and the plurality of second meshing teeth are arranged along the circumference of the first transmission shaft 10. The plurality of first meshing teeth and the plurality of second meshing teeth are engaged with each other.

[0043] The connecting section 22 is provided with a plurality of first meshing teeth arranged along its own circumference so that the connecting section 22 constitutes a spline shaft, and the connecting hole 11 is provided with a plurality of second meshing teeth arranged along its own circumference so that the first transmission shaft 10 constitutes a spline hub. The first transmission shaft 10 and the second transmission shaft 20 limit the rotation of the first transmission shaft 10 relative to the second transmission shaft 20 along the circumference of the first transmission shaft 10 through the first meshing teeth and the second meshing teeth, and at the same time allow the first transmission shaft 10 to move relative to the second transmission shaft 20 along the axial direction of the first transmission shaft 10, so that the first transmission shaft 10 and the second transmission shaft 20 can absorb the axial movement between the first transmission shaft 10 and the second transmission shaft 20 while transmitting torque.

[0044] In the embodiment of the present application, there is no restriction on the tooth shape of the first meshing teeth and the second meshing teeth, such as square teeth, triangular teeth, etc.; however, the gear formed by the first meshing teeth and the connecting section 22 must be a spur gear, and the gear ring formed by the second meshing teeth and the part of the first transmission shaft 10 with the connecting hole 11 must be a spur gear ring. Only the cooperation of the spur gear and the spur gear ring can realize the axial movement of the first transmission shaft 10 relative to the second transmission shaft 20.

[0045] In some embodiments of the present application, the oil guide holes 24 connect to the tooth bottoms of adjacent first meshing teeth. When the oil guide holes 24 connect to the tooth bottoms of adjacent first meshing teeth, the first meshing teeth have greater strength, and the grease can reach the gap between the tooth tops of the second meshing teeth and the tooth bottoms of the first meshing teeth via a shorter path. The oil guide holes 24 connect to the tooth tops of the first meshing teeth. In other embodiments of the present application, when the oil guide holes 24 connect to the tooth tops of the first meshing teeth, the grease can fill the gap between the connecting section 22 and the connecting hole 11, and the grease can directly reach the gap between the tooth tops of the first meshing teeth and the tooth bottoms of the second meshing teeth. It is understood that the oil guide holes 24 can connect to any position of the first meshing teeth. For example, some oil guide holes 24 connect to the tooth tops of the first meshing teeth, while some connect to the tooth bottoms of the first meshing teeth. In this way, the grease can reach the gap between the tooth tops of the first meshing teeth and the tooth bottoms of the second meshing teeth, as well as the gap between the tooth bottoms of the first meshing teeth and the tooth tops of the second meshing teeth.

[0046] Please refer to Figure 1 As shown, in some embodiments of the present application, the transmission mechanism also includes an oil seal 30, which is sealingly sleeved on the second transmission shaft 20 and can slide relative to the second transmission shaft 20. The oil seal 30 is installed at the end of the first transmission shaft 10 to seal the opening of the connecting hole 11.

[0047] When the first transmission shaft 10 moves relative to the second transmission shaft 20 along the axial direction of the first transmission shaft 10, the oil seal 30 moves with the first transmission shaft 10 relative to the second transmission shaft 20. The oil seal 30 seals the opening of the connecting hole 11 and the gap between the connecting hole 11 and the transmission section 21 to prevent grease from overflowing from the gap between the connecting hole 11 and the transmission section 21.

[0048] The oil seal 30 is essentially a seal, which is simply a seal for lubricating oil. It is a mechanical component used to seal grease. It isolates the parts of the transmission that need lubrication from the rest of the parts to prevent the lubricating oil from leaking.

[0049] In a second aspect, an embodiment of the present application provides a vehicle, which includes the transmission mechanism as described above.

[0050] It can be understood that the transmission mechanism in the embodiment of the present application can be applied to a transmission system in a vehicle that can absorb axial displacement when it needs to rotate, such as a power transmission shaft between a vehicle reduction gearbox and the front axle or rear axle.

[0051] Based on the vehicle of the embodiment of the present application, the vehicle has the above-mentioned transmission mechanism, which reduces the number of times the vehicle needs to add grease.

[0052] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This 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 be set in a specific orientation, constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0053] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A transmission mechanism, characterized in that: include: a first transmission shaft, the first transmission shaft having a connecting hole; The second transmission shaft includes a transmission section and a connecting section, the connecting section is slidably inserted into the connecting hole, the second transmission shaft has an oil storage chamber and an oil guide hole connecting the oil storage chamber and the peripheral wall of the connecting section, and the opening of the connecting hole is slidably and sealedly connected to the transmission section.

2. The transmission mechanism according to claim 1, wherein: The oil storage chamber is formed with an oil return port on the end surface of the connecting section away from the transmission section. The connecting section can slide in the connecting hole between a first position away from the first transmission shaft and a second position close to the first transmission shaft. When the connecting section is in the second position, a safety gap is provided between the end surface of the connecting section away from the transmission section and the bottom wall of the connecting hole.

3. The transmission mechanism according to claim 1, wherein: The oil guide hole is provided in the connecting section and extends radially along the connecting section.

4. The transmission mechanism according to claim 1, wherein: The oil guide holes are provided in a plurality of groups, and the plurality of groups of oil guide holes are distributed along the circumference of the connecting section. The plurality of oil guide holes in each group of oil guide holes are arranged along the axial direction of the connecting section.

5. The transmission mechanism according to claim 1, wherein: The oil storage chamber includes an oil storage section and a recovery section that are interconnected. The recovery section is connected to the end face of the second transmission shaft close to the first transmission shaft. The diameter of the recovery section gradually increases from the end away from the first transmission shaft to the end close to the first transmission shaft.

6. The transmission mechanism according to claim 5, wherein: The oil storage section is configured as a cylindrical cavity, and the recovery section is configured as a truncated cone cavity.

7. The transmission mechanism according to claim 1, wherein: The connecting section is provided with a plurality of first meshing teeth, which are arranged along the circumference of the connecting section; the connecting hole is provided with a plurality of second meshing teeth, which are arranged along the circumference of the first transmission shaft; the plurality of first meshing teeth and the plurality of second meshing teeth are meshed with each other.

8. The transmission mechanism according to claim 7, wherein: The oil guide hole is connected to the tooth bottom of the adjacent first meshing tooth; or, the oil guide hole is connected to the tooth top of the first meshing tooth.

9. The transmission mechanism according to claim 1, wherein: It also includes an oil seal, which is sealingly sleeved on the transmission section and can slide relative to the transmission section. The oil seal is installed on the end of the first transmission shaft to seal the opening of the connecting hole.

10. A vehicle, characterized in that: include: The transmission mechanism according to any one of claims 1 to 9.

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