CN117052807B

CN117052807B - Dustproof universal joint device

Info

Publication number: CN117052807B
Application number: CN202311309994.0A
Authority: CN
Inventors: 陆建春; 陈小敏
Original assignee: Wanxiang Qianchao Co Ltd
Current assignee: Wanxiang Qianchao Co Ltd
Priority date: 2023-10-11
Filing date: 2023-10-11
Publication date: 2023-12-29
Anticipated expiration: 2043-10-11
Also published as: CN117052807A

Abstract

The invention relates to the technical field of universal joints, in particular to a dustproof universal joint device. The bearing unit of the bearing assembly is sleeved on the outer peripheral side of the connecting shaft of the universal joint assembly, and the bearing seat is sleeved on the outer peripheral side of the bearing unit. The dustproof component is arranged at the side edge of the bearing unit. The first end of the first dustproof unit of the dustproof assembly is adjacent to the side surface of the bearing seat to form a first connecting channel. The second end of the first dustproof unit is connected with the second end of the second dustproof unit. The first end of the second dustproof unit is adjacent to the peripheral wall of the inner hole of the bearing seat to form a second connecting channel. The second end of the second dustproof unit is connected with the connecting shaft. The first dustproof unit and the second dustproof unit surround to form a temporary storage chamber. The temporary storage chamber is communicated with the external space through a first connecting channel, and is communicated with the accommodating chamber of the bearing unit through a second connecting channel. Thus, the problem of incomplete dust prevention of the bearing assembly of the universal joint device is solved.

Description

Dustproof universal joint device

Technical Field

The invention relates to the technical field of universal joints, in particular to a dustproof universal joint device.

Background

The universal joint device is one of key transmission elements for connecting a differential and wheels or a gearbox and a main speed reducer in a vehicle, can transmit torque in a certain working angle, and mainly moves in a manner of rotating around the center of the universal joint device. The universal joint device is usually positioned at the lower end of the chassis of the vehicle to work, has a short distance from the ground, and cannot be contacted with foreign matters such as sand, stone, mud, soil and the like in the running process of the vehicle. When foreign matter enters the bearing assembly of the universal joint device, abnormal abrasion and clamping stagnation of the bearing assembly can occur, so that the universal joint cannot be used. Currently, the solution to avoid such phenomena may include providing a seal on the bearing, and providing a seal at the location where the connecting shaft abuts the bearing assembly.

In the running process of the vehicle, larger foreign matters can be blocked by the sealing part, but because the sealing part and the parts of the bearing outer ring need to rotate relatively, the sealing part cannot be completely abutted with the parts of the bearing outer ring, so that fine foreign matters can enter the bearing assembly, the service life of the bearing assembly is shortened, and the running safety of the vehicle is influenced.

Disclosure of Invention

In order to solve the problem of incomplete dust prevention of a bearing assembly of a universal joint device, the invention provides a dust-proof universal joint device, which comprises:

a gimbal assembly including a connecting shaft;

a bearing assembly comprising a bearing housing, a bearing unit; the bearing unit is sleeved on the outer peripheral side of the connecting shaft, and the bearing seat is sleeved on the outer peripheral side of the bearing unit;

the dustproof assembly is arranged on the side edge of the bearing unit; the dustproof assembly comprises a first dustproof unit and a second dustproof unit; the first end of the first dustproof unit is adjacent to the side surface of the bearing seat to form a first connecting channel; the second end of the first dustproof unit is detachably connected with the second end of the second dustproof unit; the first end of the second dustproof unit is adjacent to the peripheral wall of the inner hole of the bearing seat to form a second connecting channel; the second end of the second dustproof unit is detachably connected with the connecting shaft; the first dustproof unit and the second dustproof unit surround to form a temporary storage cavity; the temporary storage chamber is communicated with the external space through the first connecting channel, and the temporary storage chamber is communicated with the accommodating chamber of the bearing unit through the second connecting channel.

In some embodiments, the first dust-proof unit includes a first dust-proof portion, a first circular arc portion, a first support portion; the first dustproof part, the first arc part and the first supporting part are sequentially and fixedly connected; the first dustproof part is adjacent to the side surface of the bearing seat to form the first connecting channel; the first arc part protrudes towards the direction away from the second dustproof unit and surrounds the second dustproof unit to form a temporary storage cavity; the first supporting part is detachably connected with the second dustproof unit.

In some embodiments, the distance between the first dust-proof portion and the bearing seat side surface increases gradually from one end of the first dust-proof portion to one end of the first dust-proof portion near the first circular arc portion.

In some embodiments, the first support includes a second connection slot; the second connecting groove is arranged at the joint of the first supporting part and the second dustproof unit and is communicated with the temporary storage cavity and the external space.

In some embodiments, the first dust-proof unit further comprises a first abutment; one end of the first abutting part is fixedly connected with one end of the first arc part, and the other end of the first abutting part is fixedly connected with the first supporting part; the first abutting portion abuts against the side wall of the second dust-proof unit.

In some embodiments, the first abutment comprises a first connection slot; the first connecting groove is arranged at the joint of the first abutting part and the second dustproof unit and is communicated with the temporary storage cavity and the second connecting groove.

In some embodiments, the second dust-proof unit includes a second dust-proof portion, a second support portion; one end of the second dustproof part is adjacent to the peripheral wall of the inner hole of the bearing seat to form a second connecting channel; the other end of the second dustproof part is fixedly connected with the second supporting part; the second supporting part is detachably connected with the connecting shaft; the second supporting part is detachably connected with the first supporting part; the second dustproof part and the first arc part surround to form the temporary storage chamber.

In some embodiments, the second dust prevention unit further includes a second circular arc portion; one end of the second arc part is fixedly connected with the second dustproof part, and the other end of the second arc part is fixedly connected with the second supporting part; the second arc part is arranged corresponding to the first arc part and surrounds the temporary storage cavity.

In some embodiments, the second dust-proof unit further comprises a second abutment; one end of the second abutting part is fixedly connected with the second circular arc part, and the other end of the second abutting part is fixedly connected with the second supporting part; and one side of the second abutting part abuts against the first dustproof unit.

In some embodiments, the dust-proof gimbal device further comprises a third dust-proof unit; the third dustproof unit is arranged in the temporary storage cavity; one end of the third dustproof unit is detachably connected with the peripheral wall of the bearing seat inner hole, and the other end of the third dustproof unit extends along the direction away from the bearing seat peripheral wall; the third dustproof unit is arranged at intervals with the first dustproof unit and the second dustproof unit.

In order to solve the problem of incomplete dust prevention of the bearing assembly of the universal joint device, the invention has the following advantages:

the dust-proof universal joint device may include: a universal joint assembly and a dustproof assembly. The gimbal assembly may include a connecting shaft that transmits torque. The dust-proof assembly may include a first dust-proof unit, a second dust-proof unit. The second end of the first dust-proof unit may be detachably connected to the second end of the second dust-proof unit. When the first dustproof unit or the second dustproof unit is worn, the first dustproof unit or the second dustproof unit can be replaced according to the wear degree, and the maintenance cost in use can be reduced. When the universal joint device rotates, the bearing seat and the second dustproof unit connected to the connecting shaft rotate relatively, and the first end of the second dustproof unit is adjacent to the second connecting channel formed by the peripheral wall of the inner hole of the bearing seat, so that friction between the second dustproof unit and a member on the outer peripheral surface of the bearing can be avoided. The first end of the first dust-proof unit may form a fine first connection passage adjacent to the side of the bearing housing, and may block large foreign substances from entering the first dust-proof unit. The first dustproof unit and the second dustproof unit can surround and form a temporary storage chamber communicated with the external space. The bearing seat and the first dustproof unit fixed on the connecting shaft rotate relatively. When the foreign matter enters from the first connecting channel, the temporary storage cavity can temporarily contain the foreign matter, and then the foreign matter is discharged by virtue of centrifugal force generated by rotation of the universal joint device, so that the normal operation of the bearing can be ensured. The temporary storage chamber can be communicated with the accommodating chamber of the bearing unit through a second connecting channel. The clearance of the second connecting channel is very small, so that the bearing unit and the second dustproof unit can be prevented from being contacted, friction is avoided, and foreign matters can be difficult to enter the accommodating cavity.

Drawings

FIG. 1 illustrates a schematic view of a dust-proof gimbal assembly of one embodiment;

FIG. 2 illustrates a dust-proof assembly schematic of a dust-proof gimbal device of an embodiment;

FIG. 3 illustrates a dust assembly schematic view of another embodiment dust gimbal device;

FIG. 4 illustrates a schematic view of another embodiment dust-proof gimbal assembly;

figure 5 shows a schematic view of a dust-proof gimbal assembly of yet another embodiment.

Reference numerals: 01 a gimbal assembly; 11 Zhong Xingtao; 12 connecting shafts; 121 a first mounting portion; 122 a second mounting portion; 123 a third mounting portion; 13 three ball pins; a 02 bearing assembly; a bearing seat 21; 22 bearing units; 221 outer race; 222 balls; 223 inner ring; 224 sealing portions; 2241, a first seal ring; 2242 second seal ring; 03 dustproof components; 31 a first dust-proof unit; 311 first dust-proof parts; 312 a first arc portion; 313 a first abutment; 3131 a first connecting groove; 314 a first support; 3141 a second connecting groove; 32 a second dust-proof unit; 321 a second dust-proof section; 322 a second arc portion; 323 a second abutment; 324 a second support; 33 a third dust-proof unit; 04 a first connection channel; 05 second connection channel.

Detailed Description

The disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those of ordinary skill in the art to better understand and thus practice the present disclosure, and are not meant to imply any limitation on the scope of the present disclosure.

As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment. The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "transverse", "longitudinal", etc. refer to an orientation or positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate. Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be. Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The present embodiment discloses a dustproof universal joint device, as shown in fig. 1 and 2, may include: a joint assembly 01, the joint assembly 01 including a connecting shaft 12; a bearing assembly 02, the bearing assembly 02 comprising a bearing housing 21, a bearing unit 22; the bearing unit 22 is sleeved on the outer peripheral side of the connecting shaft 12, and the bearing seat 21 is sleeved on the outer peripheral side of the bearing unit 22; a dust-proof component 03, the dust-proof component 03 being disposed at a side of the bearing unit 22; the dustproof assembly 03 comprises a first dustproof unit 31 and a second dustproof unit 32; a first end of the first dust prevention unit 31 is adjacent to a side of the bearing housing 21, forming a first connection channel 04; the second end of the first dust-proof unit 31 is detachably connected with the second end of the second dust-proof unit 32; the first end of the second dust-proof unit 32 is adjacent to the peripheral wall of the inner hole of the bearing housing 21, forming a second connection passage 05; a second end of the second dust-proof unit 32 is detachably connected to the connection shaft 12; the first dustproof unit 31 and the second dustproof unit 32 surround to form a temporary storage chamber; the temporary storage chamber is communicated with the external space through a first connecting channel 04, and the temporary storage chamber is communicated with the accommodating chamber of the bearing unit 22 through a second connecting channel 05.

In this embodiment, the universal joint device is one of indispensable components in a vehicle, and a differential side and a wheel side may be connected to a front-drive vehicle type, and a transmission side, a final drive side, and a differential side and a wheel side may be connected to a front-drive rear-drive vehicle. The main movement mode is rotation around the axis of the main movement mode. In order to support the joint assembly 01 and to reduce the coefficient of friction of the joint assembly 01, a bearing assembly 02 may be provided on the joint assembly 01. Because the universal joint is positioned on the chassis part of the vehicle and is close to the ground, sand, stone, mud, soil and other foreign matters easily enter the bearing assembly 02, abnormal abrasion or clamping stagnation is generated on the bearing, so that the driving wheels on two sides of the vehicle lose balance on the ground output, the normal running of the vehicle is influenced, and potential safety hazards are caused. In order to ensure the operation stability of the universal joint device, the present embodiment provides a dust-proof universal joint device. As shown in fig. 1 and 2, the dust-proof universal joint device may include: a universal joint assembly 01, a bearing assembly 02 and a dust prevention assembly 03. The universal joint assembly 01 can comprise a connecting shaft 12, the bearing assembly 02 can be sleeved at one end of the connecting shaft 12, and the dustproof assembly 03 can be sleeved on the outer circumferential surface of the connecting shaft 12 and arranged at two sides of the bearing assembly 02. The dust-proof assembly 03 can prevent foreign matter from entering the inside of the bearing assembly 02. The bearing assembly 02 may include a bearing housing 21, a bearing unit 22. The inner peripheral wall of the bearing unit 22 may be sleeved on the outer peripheral wall of the connecting shaft 12, the bearing housing 21 may be used to support the bearing assembly 02, and the inner peripheral wall of the bearing housing 21 may be provided on the outer peripheral wall of the bearing unit 22. The connecting shaft 12 can be supported, reducing frictional resistance. The dust-proof assembly 03 may include a first dust-proof unit 31, a second dust-proof unit 32. The first dust preventing unit 31 and the second dust preventing unit 32 may be rings. The first end of the first dust preventing unit 31 may be disposed adjacent to the side of the bearing housing 21, and the side of the first end of the first dust preventing unit 31 may form the first connection passage 04 with the side of the bearing housing 21. The second end of the first dust preventing unit 31 may be detachably connected to the second end of the second dust preventing unit 32. An end surface of the first end of the second dust prevention unit 32 may be adjacent to a peripheral wall of the inner hole of the bearing housing 21, and a second connection passage 05 may be formed. A second end of the second dust prevention unit 32 may be detachably coupled with the outer circumferential surface of the connection shaft 12. The first dust-proof unit 31 may be provided outside the second dust-proof unit 32 (as shown in fig. 1). Because the first dustproof unit 31 contacts with the foreign matter first, most foreign matters can be blocked, and the foreign matters contacting with the second dustproof unit 32 are less, so that the abrasion loss of the first dustproof unit 31 is larger than that of the second dustproof unit 32, the service lives of the first dustproof unit 31 and the second dustproof unit 32 are different, only the dustproof unit with the abrasion loss reaching the replacement standard can be replaced, the whole replacement is not needed, and the maintenance cost can be reduced. When the universal joint assembly 01 rotates, the second dust preventing unit 32 connected to the outer circumferential wall of the connection shaft 12 rotates relative to the bearing housing 21, and the first dust preventing unit 31 connected to the second dust preventing unit 32 rotates relative to the bearing housing 21. The first connecting channel 04 can enable the first dustproof unit 31 to be arranged at intervals with the bearing seat 21, the second connecting channel 05 can enable the second dustproof unit 32 to be arranged at intervals with the bearing seat 21, abrasion of the first dustproof unit 31 and the first dustproof unit 31 can be reduced, and resistance of the universal joint assembly 01 during rotation can be reduced. The first dust-proof unit 31 may be partially abutted against the second dust-proof unit 32, and a temporary storage chamber may be formed so as to surround a portion where the first dust-proof unit 31 and the second dust-proof unit 32 are not abutted against each other. The temporary storage chamber may communicate with the external space through the first connection passage 04, and the temporary storage chamber may communicate with the receiving chamber of the bearing unit 22 through the second connection passage 05. During the travel of the vehicle, foreign objects may enter the temporary storage chamber through the first connecting passage 04. The temporary storage chamber can temporarily hold the foreign matters, provide a buffer space for the foreign matters, and reduce the foreign matters from directly entering the second connecting channel 05. The centrifugal force generated by the rotation of the universal joint assembly 01 can discharge the foreign matters temporarily stored in the temporary storage chamber through the first connecting channel 04. In this way, foreign matter can be prevented from entering the bearing unit 22 on the premise of avoiding the dust-proof assembly 03 from generating additional friction resistance to the rotation of the universal joint assembly 01, and smooth operation of the universal joint assembly 01 can be ensured. In other embodiments, the gimbal assembly 01 may include a bell housing 11, a connecting shaft 12, a first mount 121, a second mount 122, a third mount 123, and a tripod 13. The bell housing 11 may be a cylinder provided with a blind hole in its center in the axial direction. The connection shaft 12 may be fixedly connected to an end of the Zhong Xingtao remote from the opening side. The first, second, and third mounting portions 121, 122, 123 may be provided in this order on the outer circumferential surface of the connection shaft 12. The first mounting portion 121 may be provided on a side near the bell housing 11 and may be used to mount the dust assembly 03. The second mounting portion 122 may be provided at a side of the first mounting portion 121 remote from Zhong Xingtao, and may be used to mount a bearing. The third mounting portion 123 may be provided on a side of the second mounting portion 122 away from Zhong Xingtao and may be used to mount the dust assembly 03. The tripod 13 may be provided with a splined hole in the centre in the axial direction, which may be in splined engagement with a driving rod (not shown). The outer side of the tripod pin 13 can be abutted against the inner peripheral surface of the bell housing 11, and can slide on the inner peripheral surface of the bell housing 11. As the joint assembly 01 rotates, the tripod pins 13 can transmit torque from the bell housing 11 to the drive rod. In still other embodiments, the bearing unit 22 may include an outer race 221, balls 23, an inner race 223, and a seal 224. The outer ring 221 and the inner ring 223 may be cylindrical bodies having a through hole at the center. Outer ring 221 may have a larger diameter than inner ring 223. Outer ring 221 and inner ring 223 may be disposed concentrically. The inner circumferential surface of the outer ring 221 and the outer circumferential surface of the inner ring 223 may be provided with grooves. The balls 222 may be disposed between the grooves of the inner circumferential surface of the outer ring 221 and the grooves of the outer circumferential surface of the inner ring 223, and the balls 222 may be prevented from rolling out of the inner ring 223 and the outer ring 221. The sealing portion 224 may include a first sealing ring 2241, a second sealing ring 2242. The first sealing ring 2241 and the second sealing ring 2242 may be respectively disposed at both sides of the axial direction of the outer ring 221 of the ball 222, so as to prevent foreign matters from entering the bearing assembly 02 and ensure smooth operation of the bearing assembly 02.

In some embodiments, as shown in fig. 2, 3, and 4, the first dust-proof unit 31 includes a first dust-proof portion 311, a first circular arc portion 312, and a first support portion 314; the first dust-proof part 311, the first circular arc part 312 and the first support part 314 are fixedly connected in sequence; the first dust-proof part 311 is adjacent to the side surface of the bearing seat 21, forming a first connecting channel 04; the first arc part 312 protrudes away from the second dust-proof unit 32 and surrounds the second dust-proof unit 32 to form a temporary storage chamber; the first support 314 is detachably connected to the second dust-proof unit 32.

In the present embodiment, as shown in fig. 2, 3, and 4, the first dust prevention unit 31 may include a first dust prevention portion 311, a first circular arc portion 312, and a first support portion 314. The first dust-proof portion 311 may be disposed at a side of the first dust-proof unit 31 away from the connection shaft 12, the first support portion 314 may be disposed at a side of the first dust-proof unit 31 near the connection shaft 12, and the first arc portion 312 may be disposed between the first dust-proof portion 311 and the first support portion 314. The first dust prevention part 311 may form a first connection passage 04 adjacent to the bearing housing 21 side and the bearing housing 21 side. When the bearing housing 21 and the first dust-proof portion 311 relatively rotate, the first connecting passage 04 can prevent the first dust-proof portion 311 from contacting the bearing housing 21 to generate frictional resistance, thereby reducing torque loss and improving vehicle running economy. The gap of the first connecting passage 04 is small, and large foreign matter can be prevented from entering. The first arc portion 312 may protrude away from the second dust-proof unit 32, and may surround the second dust-proof unit 32 to form a temporary storage chamber. The protruding of first circular arc portion 312 can enlarge the volume of the cavity of keeping in, and when the foreign matter gets into the cavity of keeping in through first connecting channel 04, the cavity of keeping in of large capacity can provide more buffer space for the foreign matter, lets the probability that the foreign matter goes deep once more reduce, can guarantee the smooth operation of bearing to bellied arch can also improve the intensity of first dustproof unit 31. The first supporting portion 314 can be detachably connected to the second dust-proof unit 32, and can be replaced according to different wear degrees of the first supporting portion 314 and the second dust-proof unit 32, so as to achieve the effect of reducing the cost.

In some embodiments, as shown in fig. 1 and 4, the distance between the first dust-proof portion 311 and the side surface of the bearing seat 21 increases gradually from one end of the first dust-proof portion 311 to one end of the first dust-proof portion 311 near the first circular arc portion 312.

In this embodiment, as shown in fig. 1 and 4, the distance between the first dust-proof portion 311 and the side surface of the bearing seat 21 may gradually increase from one end of the first dust-proof portion 311 to one end of the first dust-proof portion 311 near the first circular arc portion 312, and may be in a horn shape with a large inner side and a small outer side (as shown in fig. 4). During operation of the joint assembly 01, foreign matter is difficult to enter due to the small outer pitch. When the foreign matter enters the temporary storage chamber, the large space on the inner side can enable the foreign matter to be discharged from the temporary storage chamber more easily by the centrifugal force generated by the rotation of the universal joint assembly 01. Foreign matters are difficult to enter and exit, and the effect of protecting the bearing is further optimized.

In some embodiments, as shown in fig. 2 and 4, the first support 314 includes a second connection groove 3141; the second connecting groove 3141 is disposed at a contact position between the first supporting portion 314 and the second dust-proof unit 32, and communicates with the temporary storage chamber and the external space.

In this embodiment, as shown in fig. 2 and 4, the first supporting portion 314 may include a second connecting groove 3141, the second connecting groove 3141 may be disposed at a position where the first supporting portion 314 abuts against the second dust-proof unit 32, and the second connecting groove 3141 may communicate the temporary storage chamber with the external space. When the foreign matter enters the temporary storage chamber, the foreign matter may be discharged to the external space through the second connection groove 3141. Because the universal joint device is outside the vehicle, the temperature of the working environment can be changed along with the air temperature, and the second connecting groove 3141 can leave a space for the expansion and contraction of the first supporting part 314, so that the foreign matters can not be discharged in time at the extreme temperature can be prevented.

In some embodiments, as shown in fig. 2 and 4, the first dust-proof unit 31 further includes a first abutment 313; one end of the first abutting portion 313 is fixedly connected with one end of the first circular arc portion 312, and the other end is fixedly connected with the first supporting portion 314; the first contact portion 313 contacts the side wall of the second dust prevention unit 32.

In the present embodiment, as shown in fig. 2 and 4, the first dust prevention unit 31 may further include a first abutting portion 313. The first abutment portion 313 may be disposed between the first circular arc portion 312 and the first support portion 314, and both ends of the first abutment portion 313 may be fixedly connected to the first circular arc portion 312 and the first support portion 314, respectively. In this way, the first abutting portion 313 and the first supporting portion 314 can be integrated, so that a gap between the first abutting portion 313 and the first supporting portion 314 is avoided, and the strength of the first dust-proof unit 31 can be increased. The first abutting portion 313 may abut against a side wall of the second dust preventing unit 32, and the outer surface of the first dust preventing unit 31 may be impacted by foreign matter during the running of the vehicle. The impact force can be transferred to the second dustproof unit 32 by the first abutting part 313, so that the impact force can be shared by the second dustproof unit 32, the stress of the first dustproof unit 31 can be more reasonable, and the service life of the first dustproof unit 31 can be prolonged.

In some embodiments, as shown in fig. 4, the first abutment 313 includes a first connecting slot 3131; the first connecting groove 3131 is provided at a position where the first abutting portion 313 abuts against the second dust-proof unit 32, and communicates the temporary storage chamber with the second connecting groove 3141.

In this embodiment, as shown in fig. 4, the first abutting portion 313 may include a first connecting groove 3131, the first connecting groove 3131 may be disposed at a position where the first abutting portion 313 abuts against the second dust-proof unit 32, and the first connecting groove 3131 may be communicated with the temporary storage chamber and the second connecting groove 3141. When the foreign matter enters the temporary storage chamber, the foreign matter may be discharged to the external space through the second connection groove 3141 and the first connection groove 3131. Since the universal joint device is located outside the vehicle, the temperature of the working environment may vary with the air temperature, and the first connecting groove 3131 may provide space for expansion and contraction of the first abutting portion 313 and the second dust-proof unit 32, so as to prevent foreign matters from being unable to be discharged in time at extreme temperatures.

In some embodiments, the second dust-proof unit 32 includes a second dust-proof portion 321, a second support portion 324 as shown in fig. 4; one end of the second dust-proof portion 321 is adjacent to the peripheral wall of the inner hole of the bearing housing 21, forming a second connection passage 05; the other end of the second dust-proof part 321 is fixedly connected with the second supporting part 324; the second support 324 is detachably connected with the connecting shaft 12; the second support portion 324 is detachably connected to the first support portion 314; the second dust-proof portion 321 and the first arc portion 312 enclose a temporary storage chamber.

In the present embodiment, as shown in fig. 4, the second dust prevention unit 32 may include a second dust prevention portion 321, a second support portion 324. One end of the second dust-proof portion 321 may be adjacent to the peripheral wall of the inner hole of the bearing seat 21 to form the second connection channel 05, so that the second dust-proof portion 321 can be prevented from abutting the peripheral wall of the inner hole of the bearing seat 21 to generate friction resistance. The other end of the second dustproof part 321 can be fixedly connected with the second supporting part 324 in a mutually perpendicular manner, so that the second dustproof part 321 and the second supporting part 324 form a whole, and the strength and the service life of the second dustproof part are improved. The second support portion 324 may be detachably connected to the outer circumferential wall of the connection shaft 12. The second support 324 may be detachably connected to the first support 314. The first supporting portion 314 may be fixedly connected with the first dust-proof portion 311, the first arc portion 312, and the first abutting portion 313 to form an integral first dust-proof unit 31, and the second supporting portion 324 may be fixedly connected with the second dust-proof portion 321 to form an integral second dust-proof unit 32. The first dust preventing unit 31 may be located outside the second dust preventing unit 32. When the vehicle is traveling, the foreign matter first contacts the first dust-proof unit 31 located at the outer side, and the second dust-proof unit 32 contacts less foreign matter. When the universal joint device is maintained, the first dust-proof unit 31 and the second dust-proof unit 32 can be replaced according to the abrasion loss, so that the cost can be reduced. The second dust-proof portion 321 may surround the first arc portion 312 to form a temporary storage chamber. When the foreign matter enters the temporary storage chamber, the temporary storage chamber can temporarily store the foreign matter therein, provide a buffer space for the foreign matter, and prevent the foreign matter from directly contacting with the bearing unit 22 and from causing abnormal abrasion to the bearing unit 22.

In some embodiments, as shown in fig. 5, the second dust-proof unit 32 further includes a second circular arc portion 322; one end of the second arc portion 322 is fixedly connected with the second dust-proof portion 321, and the other end is fixedly connected with the second support portion 324; the second arc portion 322 is disposed corresponding to the first arc portion 312, and surrounds the temporary storage chamber.

In this embodiment, as shown in fig. 5, the second dust-proof unit 32 may further include a second arc portion 322 provided on the second dust-proof portion 321 and the second support portion 324. One end of the second arc portion 322 may be fixedly connected with the second dust-proof portion 321, and the other end may be fixedly connected with the second support portion 324, so that the second dust-proof portion 321, the second arc portion 322 and the second support portion 324 form an integral second dust-proof unit 32. The strength of the second dust prevention unit 32 can be improved and the service life can be prolonged. The second circular arc portion 322 may be provided corresponding to the first circular arc portion 312. The second arc portion 322 may surround the first arc portion 312 to form a temporary storage chamber. The second arc portion 322 and the first arc portion 312 can make the space in the temporary storage chamber larger, and after the sundries enter the temporary storage chamber, more sundries can be contained, so that buffering is provided for more sundries, the difficulty in contact between the sundries and the bearing unit 22 can be increased, and the bearing unit 22 can be ensured to operate without clamping stagnation.

In some embodiments, as shown in fig. 5, the second dust-proof unit 32 further includes a second abutment 323; one end of the second abutting portion 323 is fixedly connected with the second arc portion 322, and the other end is fixedly connected with the second supporting portion 324; the second contact portion 323 contacts the first dust prevention unit 31.

In the present embodiment, as shown in fig. 5, the second dust prevention unit 32 may further include a second abutting portion 323 provided between the second circular arc portion 322 and the second support portion 324. One end of the second abutting portion 323 may be fixedly connected with the second arc portion 322, and the other end may be fixedly connected with the second supporting portion 324. The second support portion 324, the second arc portion 322, and the second abutting portion 323 can be formed as a whole, so that gaps among the second support portion 324, the second arc portion 322, and the second abutting portion 323 are avoided, and the effect of improving strength is achieved. The second abutting portion 323 may abut against the first abutting portion 313. The second abutting portion 323 can increase the contact area with the first dust-proof unit 31, and the second abutting portion 323 can be fixedly connected with the second supporting portion 324, the second supporting portion 324 can abut against the connecting shaft 12, when the first dust-proof unit 31 is impacted by the foreign matter, the second abutting portion 323 can help the first dust-proof unit 31 to share the impact.

In some embodiments, as shown in fig. 5, the dust-proof gimbal device further includes a third dust-proof unit 33; the third dust-proof unit 33 is disposed in the temporary storage chamber; one end of the third dust-proof unit 33 is detachably connected with the peripheral wall of the inner hole of the bearing seat 21, and the other end extends along the direction away from the peripheral wall of the bearing seat 21; the third dust-proof unit 33 is provided at a distance from the first dust-proof unit 31 and the second dust-proof unit 32.

In the present embodiment, as shown in fig. 5, the dust-proof universal joint device may further include a ring-shaped third dust-proof unit 33. The third dust-proof unit 33 may be disposed in a temporary storage chamber surrounded by the first dust-proof unit 31 and the second dust-proof unit 32. The third dust prevention unit 33 may have one end detachably connected to a peripheral wall of the inner hole of the bearing housing 21 and the other end extending in a direction away from the peripheral wall of the bearing housing 21. The extended length may be greater than the gap in the vertical direction of the second connection passage 05 (as shown in fig. 5) and less than the radial dimension of the second dust prevention portion 321. In this way, the path of the foreign matters entering the bearing unit 22 can be longer and more complex on the premise of not influencing the volume of the temporary storage chamber, the foreign matters can be more effectively prevented from entering the bearing unit 22, and the smooth operation of the universal joint device is ensured.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementing the disclosure, and that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure.

Claims

1. A dustproof gimbal device, the dustproof gimbal device comprising:

a gimbal assembly including a connecting shaft;

2. A dust-proof gimbal assembly as defined in claim 1, wherein,

the first dustproof unit comprises a first dustproof part, a first arc part and a first supporting part; the first dustproof part, the first arc part and the first supporting part are sequentially and fixedly connected; the first dustproof part is adjacent to the side surface of the bearing seat to form the first connecting channel; the first arc part protrudes towards the direction away from the second dustproof unit and surrounds the second dustproof unit to form a temporary storage cavity; the first supporting part is detachably connected with the second dustproof unit.

3. A dust-proof gimbal assembly as defined in claim 2, wherein,

the distance between the first dustproof part and the side surface of the bearing seat gradually increases from one end of the first dustproof part to one end of the first dustproof part, which is close to the first arc part.

4. A dust-proof gimbal assembly as defined in claim 2, wherein,

the first supporting part comprises a second connecting groove; the second connecting groove is arranged at the joint of the first supporting part and the second dustproof unit and is communicated with the temporary storage cavity and the external space.

5. A dust-proof joint apparatus as set forth in claim 4, wherein,

the first dust-proof unit further comprises a first abutting part; one end of the first abutting part is fixedly connected with one end of the first arc part, and the other end of the first abutting part is fixedly connected with the first supporting part; the first abutting portion abuts against the side wall of the second dust-proof unit.

6. A dust-proof gimbal assembly as defined in claim 5, wherein,

the first abutting part comprises a first connecting groove; the first connecting groove is arranged at the joint of the first abutting part and the second dustproof unit and is communicated with the temporary storage cavity and the second connecting groove.

7. A dust-proof gimbal assembly as defined in claim 2, wherein,

the second dustproof unit comprises a second dustproof part and a second supporting part; one end of the second dustproof part is adjacent to the peripheral wall of the inner hole of the bearing seat to form a second connecting channel; the other end of the second dustproof part is fixedly connected with the second supporting part; the second supporting part is detachably connected with the connecting shaft; the second supporting part is detachably connected with the first supporting part; the second dustproof part and the first arc part surround to form the temporary storage chamber.

8. A dust-proof gimbal assembly as defined in claim 7, wherein,

the second dustproof unit further comprises a second arc part; one end of the second arc part is fixedly connected with the second dustproof part, and the other end of the second arc part is fixedly connected with the second supporting part; the second arc part is arranged corresponding to the first arc part and surrounds the temporary storage cavity.

9. A dust-proof gimbal assembly as defined in claim 8, wherein,

the second dust-proof unit further includes a second abutting portion; one end of the second abutting part is fixedly connected with the second circular arc part, and the other end of the second abutting part is fixedly connected with the second supporting part; and one side of the second abutting part abuts against the first dustproof unit.

10. A dust-proof gimbal assembly as defined in claim 1, wherein,

the dustproof universal joint device further comprises a third dustproof unit; the third dustproof unit is arranged in the temporary storage cavity; one end of the third dustproof unit is detachably connected with the peripheral wall of the bearing seat inner hole, and the other end of the third dustproof unit extends along the direction away from the bearing seat peripheral wall; the third dustproof unit is arranged at intervals with the first dustproof unit and the second dustproof unit.