Ball cage type universal joint coupling

Abstract

The utility model belongs to the technical field of universal joint couplings, and particularly relates to a ball cage type universal joint coupling which comprises a universal joint which is a ball cage type universal joint. One end of a shaft rod of the universal joint is provided with a connecting circular plate, the side wall of the connecting circular plate is provided with a cross-shaped fixing groove, the inner side wall of the fixing groove is rotationally provided with two positive and negative double-end lead screws which are perpendicular to each other, and the two positive and negative double-end lead screws are arranged in a front-back staggered mode. The rotary knob drives the positive and negative double-end lead screws to rotate, then the worm and the worm gear drive the other positive and negative double-end lead screw to rotate at the same time, and therefore the four movable rods gradually move towards the direction where the connecting disc is located, the movable blocks are pushed to compress the springs till the plug pins are aligned with the inserting holes, and at the moment, the springs reversely push the plug pins to be inserted into the inserting holes. Therefore, the connection disc and the connection disc can be quickly assembled without tools, and the connection disc is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of universal joint couplings, in particular to a ball cage type universal joint coupling. Background Art

[0002] A coupling is a device that connects two shafts or a shaft and a rotating part, and rotates together during the transmission of motion and power, and does not disengage under normal circumstances. Sometimes it is also used as a safety device to prevent the connected parts from being subjected to excessive loads, playing the role of overload protection.

[0003] Some existing couplings are evenly installed around the connecting ends of the two connecting rods using multiple bolts. The bolt installation method requires fixing the bolts one by one, which is inconvenient during installation. Therefore, it is necessary to develop a ball cage universal joint coupling. 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 ball cage type universal joint coupling, comprising:

[0007] A universal joint, wherein the universal joint is a ball cage type universal joint;

[0008] A connecting circular plate, one end of the shaft of the universal joint is provided with a connecting circular plate, a cross-shaped fixing groove is opened on the side wall of the connecting circular plate, two mutually perpendicular positive and negative double-ended screws are rotatably provided on the inner side wall of the fixing groove, the two positive and negative double-ended screws are staggered front and back, a worm gear is provided in the middle of the rod body of one of the positive and negative double-ended screws, and a worm gear meshing with the worm gear is provided in the middle of the rod body of the other positive and negative double-ended screw;

[0009] A movable rod, each of the two ends of the forward and reverse double-end screw rods is provided with a movable rod for screw transmission, each of the movable rods is provided with a mounting groove on one side close to the center of the connecting circular plate, a transverse sliding rod is provided for sliding through the inner side wall of the mounting groove, one end of the sliding rod is located in the inner cavity of the mounting groove and is provided with a movable block perpendicular to the mounting groove, a transverse latch is provided on the side wall of the movable block, a total of four latches are provided and are arranged around the center of the connecting circular plate at equal intervals, a transverse spring is provided between the outer side wall of the movable block and the inner side wall of the mounting groove, and the rod body gap of the sliding rod passes through the inner side of the spring;

[0010] The connecting rod is to be connected, and the other side of the connecting circular plate is disassembled and installed with the connecting rod to be connected. The end of the connecting rod is connected with a circular connecting disc, and the connecting disc fits the center of the side wall of the connecting circular plate. The diameter of the connecting disc is larger than the diameter of the connecting rod, and the thickness of the connecting disc is larger than the distance between the end of the pin and the side of the connecting circular plate, and the side walls of the connecting disc are opened with sockets for inserting the pins.

[0011] As a preferred solution of the ball cage universal joint coupling described in the utility model, one end of the forward and reverse double-ended screw on which the worm is installed extends and rotates to penetrate the outer side wall of the connecting circular plate, and a knob is provided at the end.

[0012] As a preferred solution of the ball cage universal joint coupling described in the utility model, the outer side wall of the connecting circular plate is fixedly provided with an annular hollow shell, the inner diameter of the shell is larger than the outer diameter of the rod to be connected, and the inner cavity of the shell accommodates all the movable rods.

[0013] As a preferred solution of the ball cage universal joint coupling described in the utility model, the other end of the slide rod is located outside the shell and is provided with a pull plate, and the side wall of the shell is opened with sliding openings around it for the slide rod to move freely.

[0014] As a preferred solution of the ball cage universal joint coupling described in the utility model, the end of the latch away from the movable block is in a hemispherical shape, and the edge of the connecting disc close to the insertion hole is in an arc shape.

[0015] As a preferred solution of the ball cage universal joint coupling described in the utility model, the thickness of the movable rod is equal to the inner groove width of the fixed groove, and the outer diameter of the pin is equal to the inner diameter of the insertion hole.

[0016] As a preferred solution of a ball cage universal joint coupling described in the utility model, a cross-shaped positioning strip is arranged at the center of one side of the connecting disc away from the rod to be connected, the positioning strip is aligned and inserted into the fixed groove, and the positive and negative double-headed screw, worm wheel and worm are arranged with a gap between the positioning strip.

[0017] Compared with the prior art, the beneficial effect of the utility model is that when it is necessary to quickly assemble the rod to be connected and the connecting circular plate on the universal joint shaft rod, the positioning bar of the rod to be connected is inserted into the groove of the fixed groove, and the positive and negative double-ended screw is driven to rotate by the knob, and then the other positive and negative double-ended screw is driven to rotate at the same time by the worm and the worm gear, so that the four movable rods gradually move toward the direction of the connecting disk, and the end of the pin will contact along the edge of the connecting disk to generate a small friction force, while causing the pin to move, thereby pushing the movable block to compress the spring until the pin is aligned with the socket. At this time, the spring pushes the pin back and inserts it into the hole of the socket to lock the connecting disk, thereby realizing tool-free and quick assembly of the two, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is an exploded view of the utility model connecting the circular plate, the housing and the rod to be connected;

[0021] Figure 3 This is a schematic diagram of the structure of the connecting circular plate and its connecting parts in the side view of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the cross section of the movable rod and its connecting parts of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the utility model in the side view of the connecting rod;

[0024] Figure 6 It is a schematic diagram of the structure of the utility model after the plug is inserted into the socket.

[0025] In the figure: universal joint 100, connecting circular plate 200, fixing groove 210, positive and negative double-ended screw 220, worm wheel 240, worm 250, knob 260, movable rod 300, mounting groove 310, sliding rod 320, movable block 330, latch 340, spring 350, housing 360, pull plate 370, sliding mouth 380, rod to be connected 400, connecting disc 410, socket 420, positioning strip 430. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] See also Figure 1-Figure 6 , which shows a schematic diagram of the structure of a ball cage universal joint coupling embodiment of the utility model, please refer to Figure 1-Figure 6 , a ball cage type universal joint coupling is introduced in detail.

[0031] A ball cage type universal joint coupling comprises a universal joint 100, wherein the universal joint 100 is a ball cage type universal joint;

[0032] A connecting circular plate 200 is provided at one end of the shaft of the universal joint 100, and a cross-shaped fixing groove 210 is provided on the side wall of the connecting circular plate 200. Two mutually perpendicular positive and negative double-ended screw rods 220 are rotatably provided on the inner side wall of the fixing groove 210. The two positive and negative double-ended screw rods 220 are staggered in front and back. A worm gear 240 is provided in the middle of the shaft of one of the positive and negative double-ended screw rods 220, and a worm 250 meshing with the worm gear 240 is provided in the middle of the shaft of the other positive and negative double-ended screw rod 220.

[0033] The two ends of each of the forward and reverse double-ended screw rods 220 are screwed together to provide a movable rod 300, and each of the movable rods 300 is provided with a mounting groove 310 on one side close to the center of the connecting circular plate 200, and a transverse sliding rod 320 is slidably penetrated through the inner wall of the mounting groove 310, and one end of the sliding rod 320 is located in the inner cavity of the mounting groove 310 and is provided with a movable block 330 perpendicular to the mounting groove 310, and a transverse latch 340 is protruded from the side wall of the movable block 330, and a total of four latches 340 are provided and are arranged around the center of the connecting circular plate 200 at equal intervals, and a transverse spring 350 is provided between the outer wall of the movable block 330 and the inner wall of the mounting groove 310, and the shaft gap of the sliding rod 320 penetrates the inner side of the spring 350;

[0034] A connecting rod 400 is disassembled and installed on the other side of the connecting circular plate 200, and a circular connecting disc 410 is connected to the end of the connecting rod 400. The connecting disc 410 fits the center of the side wall of the connecting circular plate 200, and the diameter of the connecting disc 410 is larger than the diameter of the connecting rod 400. The thickness of the connecting disc 410 is larger than the distance between the end of the plug 340 and the side of the connecting circular plate 200, and the side walls of the connecting disc 410 are opened with sockets 420 for inserting the plug 340.

[0035] Furthermore, one end of the forward and reverse double-ended screw rod 220 on which the worm 250 is installed extends and rotates to penetrate the outer wall of the connecting circular plate 200, and a knob 260 is provided at the end. When the connecting rod 400 is installed, the knob 260 is used to conveniently drive the forward and reverse double-ended screw rod 220 to rotate, and then the worm 250 and the worm wheel 240 drive the other forward and reverse double-ended screw rod 220 to rotate at the same time, so that the four movable rods 300 gradually move toward the direction of the connecting disk 410.

[0036] Furthermore, an annular hollow shell 360 is fixedly provided on the outer wall of the connecting circular plate 200, and the inner diameter of the shell 360 is larger than the outer diameter of the rod 400 to be connected. The inner cavity of the shell 360 accommodates all the movable rods 300. The shell 360 is set to prevent the components from being directly exposed to the outside world.

[0037] Furthermore, the other end of the slide rod 320 is located on the outside of the shell 360 and is provided with a pull plate 370. The side walls of the shell 360 are opened with sliding openings 380 for the slide rod 320 to move freely. The slide rod 320 can be easily pulled by the pull plate 370. When the connecting rod 400 needs to be disassembled, the pull plate 370 is pulled first to drive the spring 350 to be completely compressed, so that the pin 340 is pulled out from the hole of the socket 420, and then the knob 260 is rotated in the opposite direction to make the four movable rods 300 gradually move away from the position of the connecting disk 410. The connecting rod 400 can be pulled out from the inner side of the shell 360 to complete the disassembly.

[0038] Furthermore, the end of the latch 340 away from the movable block 330 is in the shape of a hemisphere, and the edge of the connecting disk 410 close to the socket 420 is in the shape of an arc. When the four movable rods 300 gradually move toward the direction of the connecting disk 410, since the thickness of the connecting disk 410 is greater than the distance between the end of the latch 340 and the side of the connecting circular plate 200, the end of the latch 340 will first touch the edge of the connecting disk 410. Since its end is in the shape of a hemisphere and has a smooth surface, and the edge surface of the connecting disk 410 is also smooth, the end of the fixed latch 340 will contact along the edge of the connecting disk 410 to generate a small friction force, while causing the latch 340 to move, thereby pushing the movable block 330 to compress the spring 350. Until the latch 340 is aligned with the socket 420, the spring 350 pushes the latch 340 back to insert into the hole of the socket 420, thereby locking the connecting disk 410.

[0039] Furthermore, the thickness of the movable rod 300 is equal to the inner groove width of the fixed groove 210. When the forward and reverse double-ended screw rod 220 rotates, since the thickness of the movable rod 300 is equal to the inner groove width of the fixed groove 210, the fixed movable rod 300 will not rotate, but move along the rod body of the forward and reverse double-ended screw rod 220. The outer diameter of the pin 340 is equal to the inner diameter of the socket 420, so that the pin 340 fits better after being inserted into the socket 420.

[0040] Furthermore, a cross-shaped positioning bar 430 is provided at the center of one side of the connecting disc 410 away from the rod 400 to be connected. The positioning bar 430 is aligned and inserted into the fixed groove 210, and the positive and negative double-headed screw 220, the worm wheel 240 and the worm 250 are provided with a gap between the positioning bar 430. When the connecting disc 410 is inserted into the inner side of the outer shell 360, the rod 400 to be connected is appropriately rotated to see whether the connecting rod 400 and the shaft of the universal joint 100 can rotate relative to each other. If they can rotate, it means that the positioning bar 430 is not inserted into the groove of the fixed groove 210, and the socket 420 and the movable block 330 cannot be aligned at this time; if they cannot rotate, it means that the positioning bar 430 is inserted into the groove of the fixed groove 210, and the socket 420 and the movable block 330 can be aligned.

[0041] When the connecting rod 400 needs to be quickly assembled with the connecting circular plate 200 on the shaft of the universal joint 100, the positioning bar 430 of the connecting rod 400 is inserted into the groove of the fixing groove 210, and the positive and negative double-ended screw rod 220 is driven to rotate by the knob 260, and then the other positive and negative double-ended screw rod 220 is driven to rotate at the same time by the worm 250 and the worm wheel 240, so that the four movable rods 300 gradually move toward the direction of the connecting disk 410, and the end of the pin 340 will contact along the edge of the connecting disk 410 to generate a small friction force, while causing the pin 340 to move, thereby pushing the movable block 330 to compress the spring 350 until the pin 340 is aligned with the socket 420. At this time, the spring 350 pushes the pin 340 back and inserts it into the hole of the socket 420 to lock the connecting disk 410, thereby realizing tool-free and quick assembly of the two, which is convenient for use.

[0042] 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 ball cage universal joint coupling, characterized in that: include: A universal joint (100), wherein the universal joint (100) is a ball cage type universal joint; A connecting circular plate (200), wherein one end of the shaft of the universal joint (100) is provided with a connecting circular plate (200), a cross-shaped fixing groove (210) is provided on the side wall of the connecting circular plate (200), two mutually perpendicular positive and negative double-ended screw rods (220) are rotatably provided on the inner side wall of the fixing groove (210), the two positive and negative double-ended screw rods (220) are arranged in a staggered manner in front and back, a worm gear (240) is provided in the middle of the rod body of one of the positive and negative double-ended screw rods (220), and a worm gear (250) meshing with the worm gear (240) is provided in the middle of the rod body of the other positive and negative double-ended screw rod (220); A movable rod (300), wherein both ends of each of the forward and reverse double-ended screw rods (220) are screw-connected and provided with movable rods (300), a mounting groove (310) is provided on one side of each movable rod (300) close to the center of the connecting circular plate (200), a transverse sliding rod (320) is slidably penetrated through the inner wall of the mounting groove (310), one end of the sliding rod (320) is located in the inner cavity of the mounting groove (310) and is provided with a movable block (330) perpendicular to the mounting groove (310), a transverse latch (340) is protruding from the side wall of the movable block (330), a total of four latches (340) are provided and are equidistantly arranged around the center of the connecting circular plate (200), a transverse spring (350) is provided between the outer wall of the movable block (330) and the inner wall of the mounting groove (310), and the shaft of the sliding rod (320) passes through the inner side of the spring (350); The connecting rod (400) is disassembled and installed on the other side of the connecting circular plate (200), and the end of the connecting rod (400) is connected with a circular connecting disc (410), and the connecting disc (410) fits the center of the side wall of the connecting circular plate (200), the diameter of the connecting disc (410) is larger than the diameter of the connecting rod (400), the thickness of the connecting disc (410) is larger than the distance between the end of the plug (340) and the side of the connecting circular plate (200), and the side wall of the connecting disc (410) is opened with a socket (420) for the plug (340) to be inserted.

2. A ball cage universal joint coupling according to claim 1, characterized in that: One end of the forward and reverse double-ended screw (220) on which the worm (250) is mounted extends and rotates to penetrate the outer side wall of the connecting circular plate (200), and a knob (260) is provided at the end.

3. The ball cage universal joint coupling according to claim 1, characterized in that: An annular hollow shell (360) is fixedly provided on the outer side wall of the connecting circular plate (200); the inner diameter of the shell (360) is larger than the outer diameter of the rod (400) to be connected; and the inner cavity of the shell (360) accommodates all the movable rods (300).

4. A ball cage universal joint coupling according to claim 3, characterized in that: The other end of the slide bar (320) is located outside the housing (360) and is provided with a pull plate (370), and a sliding opening (380) is opened around the side wall of the housing (360) to allow the slide bar (320) to move freely.

5. The ball cage universal joint coupling according to claim 1, characterized in that: The end of the latch pin (340) away from the movable block (330) is in the shape of a hemisphere, and the edge of the connecting disc (410) close to the insertion hole (420) is in the shape of an arc.

6. The ball cage universal joint coupling according to claim 1, characterized in that: The thickness of the movable rod (300) is equal to the inner groove width of the fixing groove (210), and the outer diameter of the latch pin (340) is equal to the inner diameter of the insertion hole (420).

7. The ball cage universal joint coupling according to claim 1, characterized in that: A cross-shaped positioning bar (430) is provided at the center of one side of the connecting disc (410) away from the rod (400) to be connected. The positioning bar (430) is aligned and inserted into the fixing groove (210) in a snug fit. The forward and reverse double-ended lead screw (220), the worm wheel (240) and the worm (250) are provided with a gap between the positioning bar (430).

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