Adjustable universal joint

Abstract

The utility model relates to the field of transmission devices, and discloses an adjustable universal joint which comprises an upper connecting column and a lower connecting column, the upper connecting column and the lower connecting column are connected through a connecting structure, and fixing structures are arranged at the positions, close to the lower ends, of the centers of the two side walls of the upper connecting column and the positions, close to the upper ends, of the centers of the two side walls of the lower connecting column respectively. The other ends of the four fixing structures penetrate through the two side walls of the upper connecting column and the two side walls of the lower connecting column correspondingly and extend into the connecting structures correspondingly. According to the utility model, through the arrangement of the fixing structure, during use, friction is generated between the balls and the side wall of the mounting plate, the balls are driven to roll in the oil holes, and lubrication in the oil holes is fully brought out in the rolling process, so that a rotating joint is well lubricated, friction is reduced, and the service life of the bearing is prolonged. And meanwhile, the whole device is modularized, so that the device can be flexibly disassembled and assembled.

Description

Technical Field

[0001] The utility model relates to the field of transmission devices, in particular to an adjustable universal joint. Background Art

[0002] A universal joint, also known as a universal joint, universal joint, or cardan shaft, is a mechanical device used to connect two shafts or rods and transmit torque while allowing them to rotate between different angles. It is commonly used in mechanical systems that need to transmit power or rotational motion, where the axes of the two shafts may not be in a perfectly aligned position. A universal joint is usually composed of the ends of two (sometimes four) connecting rods or pipes that intersect at one or more axis centers. The connection points of these connecting rods or pipes form one or more revolute joints, allowing the two shafts to transmit torque between different angles and axes without causing significant transmission losses or mechanical stress.

[0003] However, the existing universal joints still have some deficiencies and areas for improvement during actual use. During long-term use, the existing universal joints are usually coated with lubricating oil inside due to the friction between metals to ensure good use effects. However, this method is mostly done manually. At the same time, the existing universal joints have deficiencies in disassembly and maintenance, and cannot be adjusted according to the use process. Therefore, technicians in this field provide an adjustable universal joint to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the present utility model is to solve the shortcomings existing in the prior art, and an adjustable universal joint is proposed. When in use, the length between the two expansion plates is adjusted according to the width of the connection. When in use, it is pulled to both sides and the internal spring is stretched by two connecting rods. It is then installed and positioned through the mounting hole. After disassembly, it quickly returns to its original state under the action of the spring, which is convenient for adjustment. Lubricating oil is injected into the interior of the oil storage chamber and sealed by a sealing plug. It can be used when in use and does not need to be repeatedly added in a short time. Friction is generated between the ball and the side wall of the mounting plate, driving the ball to roll inside the oil hole. During the rolling process, the lubrication inside the oil hole is fully brought out, thereby well lubricating the rotating connection and reducing friction. At the same time, the whole is set to a modular setting, so that it can be flexibly disassembled and assembled.

[0005] The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket.

[0006] Through the above technical solution, when in use, the length between the two expansion plates is adjusted according to the width of the connection. When in use, it is pulled to both sides, and the internal spring is stretched using the two connecting rods. It is then installed and positioned through the mounting hole. After disassembly, it quickly returns to its original shape under the action of the spring, making it easy to adjust.

[0007] Furthermore, the connection structure includes a connection block, an oil filling hole is provided at the center of the upper end surface of the connection block, the lower end of the oil filling hole passes through the upper end surface of the connection block and leads to the interior, an oil storage cavity is provided inside the connection block, a sealing plug is threadedly connected to the interior of the oil filling hole, and through holes are respectively provided at the centers of the four side walls of the connection block;

[0008] According to the above technical solution, when in use, lubricating oil is injected into the oil storage cavity and sealed by the sealing plug, so that it can be used when in use without the need for repeated addition in a short period of time.

[0009] Furthermore, the fixing structure includes a connecting sleeve, one side wall of the connecting sleeve is respectively provided with oil holes at four quadrant points, and balls are respectively provided at the inner centers of the four oil holes near the edges thereof for rolling. A mounting plate is provided inside the connecting sleeve, and four fixing bolts are provided on one side wall of the mounting plate, and the other ends of the four fixing bolts respectively penetrate the side wall of the mounting plate and extend to the other side.

[0010] Through the above technical solution, when in use, friction is generated between the ball and the side wall of the mounting plate, driving the ball to roll inside the oil hole. During the rolling process, the lubrication inside the oil hole is fully brought out, thereby lubricating the rotating connection well and reducing friction. At the same time, the overall setting is modular, so that it can be flexibly disassembled and assembled.

[0011] Furthermore, the upper connecting column and the lower connecting column have the same internal structure;

[0012] Through the above technical solution, the structure is the same, which facilitates connection in two directions.

[0013] Furthermore, a slideway adapted to the ball bearing is provided on the other side wall of the mounting plate;

[0014] The above technical solution facilitates the rolling of the balls inside.

[0015] Furthermore, the sealing plug is made of rubber;

[0016] The above technical solution can achieve a good sealing effect and is not prone to oil leakage.

[0017] Furthermore, the connection block is in the shape of a cube;

[0018] The above technical solution facilitates good internal transmission.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, the length between the two expansion plates is adjusted according to the width of the connection. When in use, the expansion plates are pulled to both sides, and the internal springs are stretched by using two connecting rods. Then, the expansion plates are installed and positioned through the mounting holes. After disassembly, the expansion plates quickly return to their original shape under the action of the springs, making adjustment easy.

[0021] 2. In the utility model, by setting a fixed structure, when in use, friction is generated between the ball and the side wall of the mounting plate, driving the ball to roll inside the oil hole. During the rolling process, the lubrication inside the oil hole is fully brought out, thereby lubricating the rotating connection well and reducing friction. At the same time, the overall setting is modular, so that it can be flexibly disassembled and assembled.

[0022] 3. In the present invention, by setting a connection structure, when in use, lubricating oil is injected into the oil storage cavity and sealed by a sealing plug, so that it can be used when in use without the need for repeated addition in a short period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an axonometric diagram of an adjustable universal joint proposed in the utility model;

[0024] Figure 2 This is a front view of an adjustable universal joint proposed by the utility model;

[0025] Figure 3 This is an axonometric drawing from another perspective of the adjustable universal joint proposed in the utility model;

[0026] Figure 4 for Figure 2 Cross-sectional view in the AA direction.

[0027] Legend:

[0028] 1. Upper connecting column; 101. Movable groove; 102. Slide groove; 103. Spring; 104. Connecting rod; 2. Connecting structure; 201. Sealing plug; 202. Connecting block; 203. Oil filling hole; 204. Oil storage chamber; 205. Through hole; 3. Lower connecting column; 4. Expansion plate; 5. Mounting hole; 6. Fixing structure; 601. Fixing bolt; 602. Mounting plate; 603. Oil hole; 604. Connecting sleeve; 605. Ball. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figure 1-4, the utility model provides an embodiment: an adjustable universal joint, including an upper connecting column 1 and a lower connecting column 3, the upper connecting column 1 and the lower connecting column 3 are connected by a connecting structure 2, and a fixing structure 6 is respectively provided at the lower end of the center of the two side walls of the upper connecting column 1 and the upper end of the two side walls of the lower connecting column 3, and the other ends of the four fixing structures 6 respectively penetrate the two side walls of the upper connecting column 1 and the lower connecting column 3 and respectively pass into the interior of the connecting structure 2, and a movable groove 101 is respectively provided in the center of the two side walls of the upper connecting column 1 and the lower connecting column 3, and a spring 103 is respectively provided in the four movable grooves 101, and one end of the four springs 103 is respectively fixedly connected to the center of an inner wall of the four movable grooves 101. Connecting rods 104 are respectively provided inside the movable groove 101, and sliding grooves 102 are respectively provided on the two inner walls of the four movable grooves 101. The other ends of the four springs 103 are respectively fixedly connected to the center of one side wall of the four connecting rods 104, and the other ends of the four connecting rods 104 are respectively fixedly connected to the expansion plates 4. Two mounting holes 5 are respectively provided on the upper end surfaces of the four expansion plates 4. When in use, the length between the two expansion plates 4 is adjusted according to the width of the connection. When in use, it is pulled to both sides and the internal springs 103 are stretched by using the two connecting rods 104, and then it is installed and positioned through the mounting holes 5. After disassembly, it quickly returns to its original shape under the action of the springs 103, which is convenient for adjustment.

[0031] The connecting structure 2 includes a connecting block 202, and an oil filling hole 203 is provided at the center of the upper end surface of the connecting block 202. The lower end of the oil filling hole 203 passes through the upper end surface of the connecting block 202 and passes into the interior. An oil storage chamber 204 is provided inside the connecting block 202. The internal thread of the oil filling hole 203 is connected to a sealing plug 201. The four side walls of the connecting block 202 are respectively provided with through holes 205 at the center. When in use, the lubricating oil is injected into the interior of the oil storage chamber 204 and sealed by the sealing plug 201. It can be used when in use and does not need to be repeatedly added in a short time.

[0032] The fixing structure 6 includes a connecting sleeve 604, and oil holes 603 are respectively provided on one side wall of the connecting sleeve 604 at four quadrant points. Balls 605 are respectively provided at the inner centers of the four oil holes 603 and at the edges thereof. A mounting plate 602 is provided inside the connecting sleeve 604, and four fixing bolts 601 are provided on one side wall of the mounting plate 602. The other ends of the four fixing bolts 601 respectively penetrate the side walls of the mounting plate 602 and pass to the other side. When in use, friction is generated between the ball 605 and the side wall of the mounting plate 602, driving the ball 605 to roll inside the oil hole 603. During the rolling process, the lubrication inside the oil hole 603 is fully brought out, thereby lubricating the rotating connection well and reducing friction. At the same time, the overall setting is modular, so that it can be flexibly disassembled and assembled.

[0033] The upper connecting column 1 has the same internal structure as the lower connecting column 3. A slideway that matches the ball 605 is provided on the other side wall of the mounting plate 602. The sealing plug 201 is made of rubber and the connecting block 202 is in the shape of a cube, which facilitates good transmission inside.

[0034] Working principle: The utility model is an adjustable universal joint. When in use, the length between the two expansion plates 4 is adjusted according to the width of the connection. When in use, it is pulled to both sides and the internal spring 103 is stretched by the two connecting rods 104. It is then installed and positioned through the mounting hole 5. After disassembly, it quickly returns to its original shape under the action of the spring 103, which is convenient for adjustment. When in use, lubricating oil is injected into the oil storage chamber 204 and sealed by the sealing plug 201. It can be used when in use and does not need to be repeatedly added in a short time. Friction is generated between the ball 605 and the side wall of the mounting plate 602, driving the ball 605 to roll inside the oil hole 603. During the rolling process, the lubrication inside the oil hole 603 is fully brought out, thereby lubricating the rotating connection well and reducing friction. At the same time, the overall setting is modular, so that it can be flexibly disassembled and assembled.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An adjustable universal joint, comprising an upper connecting post (1) and a lower connecting post (3), characterized in that: The upper connecting column (1) and the lower connecting column (3) are connected via a connecting structure (2). A fixing structure (6) is provided at the lower end of the center of the two side walls of the upper connecting column (1) and the upper end of the two side walls of the lower connecting column (3). The other ends of the four fixing structures (6) respectively penetrate the two side walls of the upper connecting column (1) and the lower connecting column (3) and respectively pass into the interior of the connecting structure (2). A movable groove (101) is provided at the center of the two side walls of the upper connecting column (1) and the lower connecting column (3). A spring (103) is provided inside the four movable grooves (101). ), one end of the four springs (103) is respectively fixedly connected to the center of an inner wall of the four movable grooves (101), a connecting rod (104) is respectively provided inside the four movable grooves (101), and a sliding groove (102) is respectively provided on the two inner walls of the four movable grooves (101), the other end of the four springs (103) is respectively fixedly connected to the center of a side wall of the four connecting rods (104), the other end of the four connecting rods (104) is respectively fixedly connected to an expansion plate (4), and two mounting holes (5) are respectively provided on the upper end surface of the four expansion plates (4).

2. The adjustable universal joint according to claim 1, characterized in that: The connection structure (2) comprises a connection block (202), an oil filling hole (203) is provided at the center of the upper end surface of the connection block (202), the lower end of the oil filling hole (203) passes through the upper end surface of the connection block (202) and leads to the interior, an oil storage cavity (204) is provided inside the connection block (202), a sealing plug (201) is connected to the internal thread of the oil filling hole (203), and through holes (205) are respectively provided at the centers of the four side walls of the connection block (202).

3. The adjustable universal joint according to claim 1, characterized in that: The fixing structure (6) comprises a connecting sleeve (604), one side wall of the connecting sleeve (604) is respectively provided with oil holes (603) at four quadrant points, and balls (605) are respectively provided at the inner centers of the four oil holes (603) at the edges thereof, and a mounting plate (602) is provided inside the connecting sleeve (604), and four fixing bolts (601) are provided on one side wall of the mounting plate (602), and the other ends of the four fixing bolts (601) respectively penetrate the side wall of the mounting plate (602) and respectively pass to the other side.

4. The adjustable universal joint according to claim 1, characterized in that: The upper connecting column (1) and the lower connecting column (3) have the same internal structure.

5. The adjustable universal joint according to claim 3, characterized in that: A slideway adapted to the ball bearing (605) is provided on the other side wall of the mounting plate (602).

6. The adjustable universal joint according to claim 2, characterized in that: The sealing plug (201) is made of rubber.

7. The adjustable universal joint according to claim 2, characterized in that: The connection block (202) is in the shape of a cube.

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