Constant velocity universal joint with continuous lubrication function

Abstract

The utility model belongs to the technical field of universal joints, and particularly relates to a continuously-lubricated ball cage universal joint which comprises a first transmission rod, a spherical shell is arranged in the center of one end of the first transmission rod, and the spherical shell is in a hollow-core hemisphere shape. A spherical halter is movably arranged on the inner side of the spherical shell, and a second transmission rod is arranged on the outer side of the spherical halter. According to the utility model, when the transmission rod II rotates to a certain speed and the centrifugal force generated by the transmission rod II to the baffle plate exceeds the acting force applied by the torsion spring to the rotating rod, the baffle plate is opened, and a small amount of lubricating oil flows out, so that the friction force between the steel balls and the contact surfaces of the outer raceway and the inner raceway is reduced, and the lubricating state is kept for a long time; and the service life of the device is prolonged. And when the rotating speed of the second transmission rod is reduced, the centrifugal force can be correspondingly reduced, at the moment, the acting force of the torsional spring on the rotating rod takes the leading position again, the baffle is closed, and therefore excessive loss of lubricating oil can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of universal joints, in particular to a continuously lubricated ball cage universal joint. Background Art

[0002] The ball joint is an important transmission system component, widely used in many industries such as automobiles, engineering machinery, metallurgy, non-ferrous metals, petroleum machinery, textile machinery, special vehicles, etc. Its main function is to convert the rotational motion of the drive shaft into the linear motion of the tire and adapt to the steering requirements of the vehicle under different road conditions.

[0003] However, the existing universal joints cannot be continuously lubricated during long-term operation. Due to the lack of continuous lubrication, the friction between the steel balls and the ballways will continue to increase, resulting in increased wear. This wear will not only reduce the transmission efficiency of the universal joint, but also increase energy loss and may even cause mechanical failures, causing serious damage to the entire mechanical system. Therefore, it is necessary to develop a continuously lubricated ball cage universal joint. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A continuously lubricated ball cage universal joint, comprising:

[0007] A transmission rod 1, wherein a spherical shell is disposed at the center of one end of the transmission rod 1, and the spherical shell is in the shape of a hollow hemisphere;

[0008] A ball joint head, a spherical ball joint head is movably arranged inside the spherical shell, a second transmission rod is arranged outside the ball joint head, the second transmission rod and the inner cavity of the ball joint head are connected to form a liquid storage cavity, the outer surface of the liquid storage cavity is surrounded by liquid outlet holes at equal intervals around the axis of the second transmission rod, and the liquid outlet holes are connected to the inner cavity of the liquid storage cavity;

[0009] A liquid outlet pipe is provided on the inner side wall of the liquid storage cavity at each liquid outlet hole, and a baffle is rotatably provided at one end of the liquid outlet pipe away from the liquid outlet hole.

[0010] As a preferred solution of the continuously lubricated ball cage universal joint described in the utility model, the interior of the spherical shell is provided with outer raceways at equal intervals with the axis of the transmission rod as the center, the outer raceways are opened in an arc shape and a steel ball is movable inside each of the outer raceways.

[0011] As a preferred solution of the continuously lubricated ball cage universal joint described in the utility model, the number of the outer raceways and steel balls is consistent with the number of the liquid outlet holes, and the positions correspond one to one.

[0012] As a preferred solution of the continuously lubricated ball cage universal joint described in the utility model, a retaining frame is movably arranged at the inner center of the spherical shell, the ball cage head is located on the inner side of the retaining frame, the outer side wall of the retaining frame is equidistantly concave with an inner raceway centered on the axis where the second transmission rod is located, and the spherical surface of the steel ball is limited and moved inside the inner raceway.

[0013] As a preferred solution of the continuously lubricated ball cage universal joint described in the utility model, a connecting hole is opened in the center of the side wall of each inner raceway, the number of the inner raceways and connecting holes is consistent with the number of the liquid outlet holes, and the positions correspond one to one.

[0014] As a preferred solution of the continuously lubricated ball cage universal joint described in the utility model, the outer wall of the second transmission rod is provided with an injection tube connected to the inner cavity of the liquid storage cavity, the injection tube is away from the location of the ball cage head and is inclined, the upper end of the injection tube is threadedly provided with a sealing cover, and the bottom of the sealing cover is provided with a sealing layer that seals the oil injection hole of the injection tube.

[0015] As a preferred solution of the continuously lubricated ball cage universal joint described in the utility model, two mounting brackets are arranged on the side of the liquid outlet pipe close to the baffle, a rotating rod is rotatably arranged between the two mounting brackets, the rotating rod is connected to one side of the baffle, and a torsion spring is arranged on the rotating rod.

[0016] As a preferred solution of the continuously lubricated ball cage universal joint described in the utility model, a sealing gasket is arranged on one side of the baffle plate that blocks the end of the liquid outlet pipe.

[0017] The beneficial effects of the utility model are:

[0018] When the transmission rod rotates to a certain speed, the centrifugal force it generates on the baffle exceeds the force applied by the torsion spring to the rotating rod, the baffle is opened, and a small amount of lubricating oil flows into the inner raceway, outer raceway and steel balls through the outlet hole and the connecting hole, thereby reducing the friction between the contact surfaces of the steel balls and the outer raceway and inner raceway, keeping them lubricated for a long time and extending the service life of the device.

[0019] The designed lubrication function also has good self-regulation ability. When the speed of the transmission rod 2 decreases, the centrifugal force will also decrease accordingly. At this time, the force of the torsion spring on the rotating rod will regain the dominant position, causing the baffle to close, thus avoiding excessive loss of lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is an exploded view of the utility model;

[0023] Figure 3 For this utility model Figure 2 A schematic diagram of the structure in the rear-view direction;

[0024] Figure 4 It is a schematic diagram of the structure of the utility model after the internal components of the ball cage head and the transmission rod and the sealing cover are opened;

[0025] Figure 5 This is a schematic diagram of the structure of the liquid outlet pipe and its connecting parts of the utility model;

[0026] Figure 6 It is a structural schematic diagram of the utility model when the baffle is opened.

[0027] In the figure: transmission rod 1 100, spherical shell 110, outer raceway 120, steel ball 130, retaining frame 140, inner raceway 150, ball cage 200, transmission rod 210, liquid storage chamber 220, liquid outlet hole 230, connecting hole 240, liquid injection pipe 250, sealing cover 260, sealing layer 270, liquid outlet pipe 300, baffle 310, mounting frame 320, rotating rod 330, sealing pad 340. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1-Figure 6 , which shows a structural schematic diagram of a continuous lubrication ball cage universal joint implementation method of the utility model, please refer to Figure 1-Figure 6 , a continuously lubricated ball cage universal joint is introduced in detail.

[0033] A continuously lubricated ball cage universal joint, comprising

[0034] A transmission rod 100, a spherical shell 110 is arranged at the center of one end of the transmission rod 100, and the spherical shell 110 is in the shape of a hollow hemisphere; the interior of the spherical shell 110 is provided with outer raceways 120 at equal intervals with the axis of the transmission rod 100 as the center, the outer raceways 120 are opened in an arc shape, and a steel ball 130 is movably limited inside each of the outer raceways 120; a retainer 140 is movably arranged at the center of the interior of the spherical shell 110;

[0035] A ball cage 200, a spherical ball cage 200 is movably provided on the inner side of the spherical shell 110, the ball cage 200 is located on the inner side of the retaining frame 140, the outer side wall of the retaining frame 140 is equidistantly provided with an inner raceway 150 with the axis of the second transmission rod 210 as the center, the spherical surface of the steel ball 130 is limited and movable on the inner side of the inner raceway 150, that is, the steel ball 130 can be limited and movable between the outer raceway 120 and the inner raceway 150, the outer side of the ball cage 200 is provided with a second transmission rod 210, the second transmission rod 210 and the inner cavity of the ball cage 200 are connected to open a liquid storage cavity 220, the outer surface of the liquid storage cavity 220 is equidistantly provided with liquid outlet holes 230 around the axis of the second transmission rod 210 as the center, and the liquid outlet holes 230 are connected to the inner cavity of the liquid storage cavity 220;

[0036] The number of the outer raceway 120 and the steel balls 130 is consistent with the number of the liquid outlet holes 230, and the positions correspond one to one; a connecting hole 240 is opened at the center of the side wall of each inner raceway 150, and the number of the inner raceway 150 and the connecting hole 240 is consistent with the number of the liquid outlet holes 230, and the positions correspond one to one, and the lubricating oil enters the interior of the spherical shell 110 through the connecting hole 240 to lubricate the components;

[0037] The outer wall of the transmission rod 210 is provided with a liquid injection pipe 250 connected to the inner cavity of the liquid storage cavity 220. The liquid injection pipe 250 is arranged away from the location of the ball joint 200 and is inclined. The upper end of the liquid injection pipe 250 is screwed with a sealing cover 260. The bottom of the sealing cover 260 is provided with a sealing layer 270 for sealing the oil injection hole of the liquid injection pipe 250. The sealing cover 260 can be opened and rotated from time to time to replenish lubricating oil to the inside of the ball joint 200 through the liquid injection pipe 250. The sealing layer 270 is provided to improve the sealing performance of the sealing cover 260 when blocking the liquid injection pipe 250, thereby preventing the leakage of lubricating oil.

[0038] The liquid outlet pipe 300 is protrudingly provided on the inner side wall of the liquid storage chamber 220 at each liquid outlet hole 230, and a baffle 310 is rotatably provided at one end of the liquid outlet pipe 300 away from the liquid outlet hole 230; two mounting frames 320 are provided on the side of the liquid outlet pipe 300 close to the baffle 310, and a rotating rod 330 is rotatably provided between the two mounting frames 320, and the rotating rod 330 is connected to one side of the baffle 310, and a torsion spring is provided on the rotating rod 330, and the torsion spring continuously applies a force to the rotating rod 330, so that the baffle 310 always blocks the end of the liquid outlet pipe 300 when no other external force is applied;

[0039] When the transmission rod 210 and the ball cage 200 rotate, the baffle 310 is opened under the action of centrifugal force, so that the lubricating oil stored in the liquid storage chamber 220 flows into the inner raceway 150, the outer raceway 120 and the steel ball 130 through the liquid outlet hole 230 and the connecting hole 240, thereby reducing the friction between the contact surfaces of the steel ball 130 and the outer raceway 120 and the inner raceway 150, so that they can maintain a lubricated state for a long time. In addition, the aperture of the liquid outlet hole 230 is small, so that the amount of lubricating oil flowing in is small, and the transmission rod 210 needs to rotate to a certain speed to exceed the force applied by the torsion spring to the rotating rod 330, so that the baffle 310 opens. Therefore, the lubricating oil does not need to be added frequently.

[0040] When the transmission rod 210 and the ball cage 200 do not rotate, the torsion spring continuously exerts a force on the rotating rod 330, driving the baffle 310 to block the liquid outlet pipe 300, so that the interior of the liquid storage chamber 220 is sealed to prevent the lubricating oil from leaking out. A sealing gasket 340 is provided on one side of the baffle 310 that blocks the end of the liquid outlet pipe 300 to improve the sealing performance when the sealing gasket 340 blocks the end of the liquid outlet pipe 300.

[0041] It should be noted that a dust cover is also provided in the present ball cage universal joint, which is a common dust cover of the existing cage universal joint. The dust cover can effectively prevent the invasion of external dust and particulate matter, thereby protecting the internal components of the device from pollution and wear. Secondly, the dust cover also plays a role in preventing the lubricating oil inside the ball cage from flowing out. The sealing performance of the dust cover can prevent the lubricating oil from leaking, thereby keeping the inside of the ball cage well lubricated and extending its service life.

[0042] In the specific use process, by unscrewing the sealing cover 260, the user replenishes the lubricating oil into the inner cavity of the liquid storage chamber 220 through the liquid injection tube 250, and then tightens the sealing cover 260 to seal the liquid storage chamber 220. When the transmission rod 210 rotates to a certain speed, the centrifugal force generated by it on the baffle 310 exceeds the force applied by the torsion spring to the rotating rod 330, and the baffle 310 is opened, and a small amount of lubricating oil flows into the inner raceway 150, the outer raceway 120 and the steel ball 1 through the liquid outlet hole 230 and the connecting hole 240. 30 is located, thereby reducing the friction between the contact surfaces of the steel ball 130 and the outer raceway 120 and the inner raceway 150, so that it can maintain a lubricated state for a long time, extending the service life of the device. The designed lubrication function also has a good self-regulating ability. It also has a good self-regulating ability. When the speed of the transmission rod 210 decreases, the centrifugal force will also decrease accordingly. At this time, the force of the torsion spring on the rotating rod 330 will re-dominate, causing the baffle 310 to close, thereby avoiding excessive loss of lubricating oil.

[0043] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A continuously lubricated ball cage universal joint, characterized in that: include: A transmission rod (100), wherein a spherical shell (110) is disposed at the center of one end of the transmission rod (100), and the spherical shell (110) is in the shape of a hollow hemisphere; A ball cage (200), wherein a spherical ball cage (200) is movably disposed inside the spherical shell (110), a second transmission rod (210) is disposed outside the ball cage (200), the second transmission rod (210) and the inner cavity of the ball cage (200) are connected to form a liquid storage cavity (220), and the outer surface of the liquid storage cavity (220) is provided with liquid outlet holes (230) at equal intervals around the axis of the second transmission rod (210), and the liquid outlet holes (230) are connected to the inner cavity of the liquid storage cavity (220); A liquid outlet pipe (300) is provided on the inner side wall of the liquid storage cavity (220) at each liquid outlet hole (230) so as to protrude therefrom, and a baffle (310) is rotatably provided at one end of the liquid outlet pipe (300) away from the liquid outlet hole (230).

2. A continuously lubricated ball cage universal joint according to claim 1, characterized in that: The interior of the spherical shell (110) is provided with outer raceways (120) at equal intervals with the axis of the transmission rod 1 (100) as the center. The outer raceways (120) are opened in an arc shape and each outer raceway (120) has a steel ball (130) inside it that is movable and limited.

3. A continuously lubricated ball cage universal joint according to claim 2, characterized in that: The number of the outer raceways (120) and the steel balls (130) is consistent with the number of the liquid outlet holes (230), and the positions correspond one to one.

4. A continuously lubricated ball cage universal joint according to claim 2, characterized in that: A retaining frame (140) is movably provided at the center of the spherical shell (110), the ball cage (200) is located on the inner side of the retaining frame (140), and an inner raceway (150) is provided on the outer side wall of the retaining frame (140) at equal intervals with the axis of the second transmission rod (210) as the center, and the spherical surface of the steel ball (130) is limited and movably located on the inner side of the inner raceway (150).

5. A continuously lubricated ball cage universal joint according to claim 4, characterized in that: A communication hole (240) is opened at the center of the side wall of each inner raceway (150), and the number of the inner raceways (150) and the communication holes (240) is consistent with the number of the liquid outlet holes (230), and the positions correspond one to one.

6. A continuously lubricated ball cage universal joint according to claim 1, characterized in that: The outer wall of the second transmission rod (210) is provided with a liquid injection tube (250) connected to the inner cavity of the liquid storage cavity (220); the liquid injection tube (250) is away from the location of the ball joint head (200) and is arranged obliquely; a sealing cover (260) is screwed on the upper end of the liquid injection tube (250); and a sealing layer (270) is provided at the bottom of the sealing cover (260) for sealing the oil injection hole of the liquid injection tube (250).

7. A continuously lubricated ball cage universal joint according to claim 1, characterized in that: Two mounting frames (320) are provided on one side of the liquid outlet pipe (300) close to the baffle plate (310), a rotating rod (330) is rotatably provided between the two mounting frames (320), the rotating rod (330) is connected to one side of the baffle plate (310), and a torsion spring is provided on the rotating rod (330).

8. A continuously lubricated ball cage universal joint according to claim 7, characterized in that: A sealing gasket (340) is provided on one side of the baffle (310) that blocks the end of the liquid outlet pipe (300).

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