Spherical joint facilitating rapid assembly and disassembly

Abstract

A spherical joint facilitating rapid assembly and disassembly, comprising a mandrel (1), a spherical joint portion fixed to the middle of the mandrel (1), an expansion sleeve (5) and a tensioning member. A sleeve hole of the expansion sleeve (5) is a conical sleeve hole (501), the diameter of the expansion sleeve (5) being less than the diameter of a mounting hole of a device mounting body (11); the spherical joint portion is a conical spherical joint body (2) matched with the conical sleeve hole (501); the end of the mandrel (1) where the small-diameter end of the conical spherical joint body (2) is located is a pulling end, the tensioning member being provided at the pulling end of the mandrel (1). During assembly, the expansion sleeve (5) is sleeved outside the conical spherical joint body (2), and the pulling end of the mandrel (1) is inserted in the large-diameter end of the conical sleeve hole (501) and extends out of the other end of the mounting hole, so as to locate the expansion sleeve (5) inside the mounting hole; and the mandrel (1) is further pulled by means of the tensioning member, so that the conical spherical joint body (2) radially expands the expansion sleeve (5) until the conical spherical joint body (2) is fixed inside the mounting hole. The product can achieve rapid assembly and rapid disassembly simply by means of the structural feature of the product itself while achieving a same mounting effect, and only needs using a wrench without the need for any special device.

Description

A ball joint that is easy to assemble and disassemble quickly Technical Field

[0001] The invention relates to a ball joint which is convenient for quick assembly and disassembly, and belongs to the technical field of ball joint assembly. Background Art

[0002] During equipment installation, the mounting components of device A and device B typically connect using a ball joint. This is accomplished by first inserting the ball joint into the mounting hole of device A's mounting component, with the ends of the ball joint's core exposed on either side of the hole, forming an interface for mounting device B. To ensure a secure connection and prevent the ball joint from moving within the mounting hole of device A's mounting component, specialized equipment is used to forcefully press the ball joint into the hole using an interference fit. Disassembly requires specialized equipment or forced removal of the ball joint from the other end of the hole.

[0003] This installation method, which requires specialized tooling and is time-consuming and labor-intensive, is acceptable for long-term connections between devices A and B. However, it is very inconvenient for short-term temporary connections requiring frequent assembly and disassembly. For example, a certain type of motor's external mounting interface uses a hanging structure (see Figure 5). A ball joint is installed in the motor's hanging hole as the mounting interface. When the factory conducts joint commissioning tests on batches of motors, it needs to constantly install and remove the ball joint in the motor's hanging hole. This type of assembly and disassembly usually uses a ball joint press tool to press the ball joint into the motor's hanging hole. This operation method has problems such as high tooling costs, low work efficiency, and inconvenient operation.

[0004] In order to solve the above problems more specifically, after searching, no patent documents that solve the above problems were found in the prior art.

[0005] Summary of the Invention

[0006] The technical problem to be solved by the present invention is: how to make the ball joint product itself have a structure that is convenient for quick assembly and disassembly.

[0007] In view of the above problems, the technical solution proposed by the present invention is:

[0008] A ball joint that is easy to assemble and disassemble quickly includes a core shaft and a ball joint part fixed to the middle of the core shaft, characterized in that it also includes an expansion sleeve and a tensioning piece, the sleeve hole of the expansion sleeve is a tapered sleeve hole, the diameter of the expansion sleeve is smaller than the diameter of the mounting hole of the equipment mounting body, the ball joint part is a tapered ball joint body that cooperates with the tapered sleeve hole, the end of the core shaft where the small diameter end of the tapered ball joint body is located is a pulling end, and the tensioning piece is arranged at the pulling end of the core shaft. During assembly, the expansion sleeve is sleeved on the tapered ball joint body, and the pulling end of the core shaft is inserted from the large diameter end of the tapered sleeve hole to the other end of the mounting hole and extends to make the expansion sleeve located in the mounting hole, and the tensioning piece further pulls the core shaft to radially expand the expansion sleeve until the tapered ball joint body is fixed in the mounting hole.

[0009] Furthermore, the tensioning member is a nut plate, the center of the nut plate has a threaded hole, the tightening end of the core shaft is provided with an external thread, the diameter of the nut plate is larger than the diameter of the mounting hole, during assembly, the nut plate cooperates with the external thread, and the core shaft is rotated so that the outer edge area of ​​the nut plate acts on the equipment mounting body outside the mounting hole to pull the core shaft.

[0010] Furthermore, the large diameter end of the expansion sleeve has a radially outward folding edge, and the folding edge is used to press on the equipment mounting body at the outer periphery of the mounting hole to resist the force of pulling the core shaft.

[0011] Furthermore, the two ends of the expansion sleeve are respectively provided with expansion slot 1 and expansion slot 2 which are opened at the respective ends. Expansion slot 1 and expansion slot 2 each extend axially toward the other open end. Expansion slot 1 which opens at the large diameter end includes an opening on the folded edge.

[0012] Furthermore, the diameter of the expansion sleeve is the same everywhere.

[0013] Furthermore, the tapered ball hinge body and the core shaft are integrally formed.

[0014] Furthermore, the tapered ball hinge body includes a tapered outer sleeve and a vulcanized rubber layer vulcanized between the tapered outer sleeve and the core shaft.

[0015] Furthermore, it also includes a large-diameter pressure plate and a rubber ring. A threaded hole is provided in the center of the large-diameter pressure plate, and an external thread 2 is provided on the outer periphery of the core shaft where the large-diameter end of the tapered ball hinge body is located. When used, the large-diameter pressure plate is installed on the core shaft through the threaded hole and the external thread 2, and the rubber ring 1 is pressed by the large-diameter pressure plate between the large-diameter pressure plate and the large-diameter end of the tapered sleeve.

[0016] Furthermore, it also includes a rubber ring 2. When used, the nut plate presses the rubber ring 2 onto the nut plate and the equipment mounting body outside the mounting hole.

[0017] Furthermore, it also includes a small-diameter pressure plate capable of pressing the small-diameter end of the conical outer sleeve, a threaded hole is provided in the center of the small-diameter pressure plate, and a cylindrical blind hole is provided in the center of the inner side of the nut plate. The assembled small-diameter pressure plate is installed on the core shaft through the threaded hole and the external thread and is hidden in the cylindrical blind hole and maintains a gap with the conical outer sleeve. It is used to press the small-diameter end of the conical outer sleeve to make the conical outer sleeve fall off during disassembly and assembly. Beneficial effects:

[0018] 1. Under the premise of achieving the same installation effect, the product's structural characteristics can be used to achieve quick installation and quick disassembly, and only a wrench is needed, without any professional equipment;

[0019] 2. The ball joint can be used repeatedly without being easily damaged;

[0020] 3. Simple structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a perspective schematic diagram of a core shaft and a tapered spherical hinge according to Example 1;

[0022] FIG2 is a perspective schematic diagram of the expansion sleeve according to the first embodiment;

[0023] FIG3 is a perspective schematic diagram of the nut plate according to the first embodiment;

[0024] FIG4 is a schematic diagram of the assembly of the ball joint according to the first embodiment;

[0025] FIG5 is a schematic diagram of the installation of the ball joint according to the first embodiment;

[0026] FIG6 is a schematic diagram of the ball joint and its installation according to the second embodiment.

[0027] In the figure: 1. core shaft; 101. external thread 1; 102. external thread 2; 2. tapered ball hinge; 3. tapered outer sleeve; 4. vulcanized rubber layer; 5. expansion sleeve; 501. tapered sleeve hole; 502. folded pressure edge; 503. expansion gap 1; 504. expansion gap 2; 6. nut plate; 601. cylindrical blind hole; 7. large diameter pressure plate; 8. small diameter pressure plate; 9. rubber ring 1; 10. rubber ring 2; 11. mounting body. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0029] Example 1

[0030] As shown in Figures 1, 2, 4, and 5, a ball joint that is easy to assemble and disassemble quickly includes a core shaft 1, and a ball joint part fixed to the middle of the core shaft 1, and also includes an expansion sleeve 5 and a tensioning piece. The sleeve hole of the expansion sleeve 5 is a tapered sleeve hole 501, and the diameter of the expansion sleeve 5 is smaller than the diameter of the mounting hole of the equipment mounting body 11. The ball joint part is a tapered ball joint body 2 that cooperates with the tapered sleeve hole 501. The end of the core shaft 1 where the small diameter end of the tapered ball joint body 2 is located is a pulling end, and the tensioning piece is provided at the pulling end of the core shaft 1. During assembly, the expansion sleeve 5 is sleeved on the outside of the tapered ball joint body 2, and the pulling end of the core shaft 1 is inserted from the large diameter end of the tapered sleeve hole 501 to the other end of the mounting hole and extends out to position the expansion sleeve 5 in the mounting hole. The tensioning piece further pulls the core shaft 1, so that the tapered ball joint body 2 radially expands the expansion sleeve 5 until the tapered ball joint body 2 is fixed in the mounting hole. In this way, during assembly, the ball joint relies on its own structural setting and can be fixed in the installation hole of the equipment installation body 11 using a tightening piece, and the ball joint can be removed by loosening the tightening piece.

[0031] As shown in Figures 1, 3, 4, and 5, the tensioning member is a nut plate 6 having a threaded hole in its center. The tensioning end of the core shaft 1 is provided with an external thread 101. The diameter of the nut plate 6 is larger than the diameter of the mounting hole. During assembly, the nut plate 6 cooperates with the external thread 101, and the core shaft 1 is rotated so that the outer edge of the nut plate 6 acts on the device mounting body 11 at the periphery of the mounting hole to pull out the core shaft 1. In this way, the ball joint relies on its own structural setting, and only a wrench is needed to rotate the core shaft 1 to fix the ball joint in the mounting hole of the device mounting body 11. During disassembly, the nut plate 6 can be removed by simply rotating the core shaft 1 in the opposite direction with a wrench, and then the end of the core shaft's pulling end can be gently tapped to withdraw the ball joint.

[0032] As shown in FIG4 , the large diameter end of the expansion sleeve 5 has a radially outward folding edge 502 , which is used to press on the equipment mounting body 11 at the periphery of the mounting hole to resist the force of pulling the core shaft 1 .

[0033] The expansion sleeve 5 has two ends, each with an expansion slot 1 503 and an expansion slot 2 504, which open at the respective ends. The expansion slot 1 503 and the expansion slot 2 504 extend axially toward the other end. The expansion slot 1 503, which opens at the large diameter end, opens at the folded edge 502. This ensures uniform expansion of the expansion sleeve 5.

[0034] The diameter of the expansion sleeve 5 is the same everywhere. This is because the equipment installation hole is a cylindrical hole with the same diameter everywhere.

[0035] As shown in FIG1 , the conical ball hinge body 2 and the core shaft 1 of this embodiment are integrally formed.

[0036] Example 2

[0037] As shown in FIG6 , the difference from the first embodiment is that the conical ball hinge body 2 includes a conical outer sleeve 3 and a vulcanized rubber layer 4 vulcanized between the conical outer sleeve 3 and the core shaft to meet the multi-directional shock absorption requirements of the running equipment.

[0038] The ball joint of this embodiment also includes a large-diameter pressure plate 7 and a rubber ring 9. The large-diameter pressure plate 7 has a threaded hole in its center, and external threads 102 are provided on the outer periphery of the core shaft 1 where the large-diameter end of the tapered ball joint body 2 is located. During use, the large-diameter pressure plate 7 is mounted on the core shaft 1 in question via the threaded hole and the external threads 102. The rubber ring 9 is pressed by the large-diameter pressure plate 7 between the large-diameter pressure plate 7 and the large-diameter end of the tapered outer sleeve 3. Its function is to apply pressure to the tapered outer sleeve 3 by the large-diameter pressure plate 7 when the core shaft 1 is pulled out during assembly, preventing the tapered outer sleeve 3 and core shaft 1 from exerting excessive shear force on the vulcanized rubber layer 4, which could cause tearing and damage. The rubber ring 9, on the other hand, is designed to accommodate the vibration deformation of the vulcanized rubber layer 4 during operation of the equipment.

[0039] This embodiment also includes a second rubber ring 10. When in use, the nut plate 6 presses the second rubber ring 10 against the nut plate 6 and the device mounting body 11 outside the mounting hole. The function of the second rubber ring 10 is also to accommodate the vibration deformation of the vulcanized rubber layer 4 during device operation.

[0040] The ball joint of this embodiment also includes a small-diameter pressure plate 8 that can press the small-diameter end of the conical sleeve 3. A threaded hole is provided in the center of the small-diameter pressure plate 8, and a cylindrical blind hole 601 is provided in the center of the inner side of the nut plate 6. The assembled small-diameter pressure plate 8 is mounted on the core shaft 1 through the threaded hole and the external thread 101 and is hidden in the cylindrical blind hole 601. During assembly and disassembly, it is used to press the small-diameter end of the conical sleeve 3 to remove the conical sleeve 3. In this way, when the core shaft 1 is pushed toward the large-diameter end of the expansion sleeve 5 during assembly and disassembly, the small-diameter pressure plate 8 applies pressure to the small-diameter end of the conical sleeve 3, which also prevents the conical sleeve 3 and the core shaft 1 from generating excessive shear force on the vulcanized rubber layer 4, causing tearing and damage. The assembled small-diameter pressure plate 8 is hidden in the cylindrical blind hole 601 and maintains a gap with the conical sleeve 3 to avoid interfering with the vibration of the conical sleeve 3.

[0041] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the scope of protection covered by the present invention. Any modifications in equivalent forms should be regarded as falling within the scope of protection covered by the present invention.

Claims

1. A ball hinge facilitating quick assembly and disassembly, comprising a core shaft (1) and a ball hinge part fixed in the middle of the core shaft (1), characterized in that: It also includes an expansion sleeve (5) and a tensioning member. The sleeve hole of the expansion sleeve (5) is a tapered sleeve hole (501). The diameter of the expansion sleeve (5) is smaller than the diameter of the mounting hole of the equipment mounting body (11). The ball hinge part is a tapered ball hinge body (2) that cooperates with the tapered sleeve hole (501). One end of the mandrel (1) where the small-diameter end of the tapered ball hinge body (2) is located is the pulling end. The tensioning member is arranged at the pulling end of the mandrel (1). During assembly, the expansion sleeve (5) is sleeved outside the tapered ball hinge body (2). The pulling end of the mandrel (1) is inserted into the large-diameter end of the tapered sleeve hole (501) and extends out of the other end of the mounting hole, and the expansion sleeve (5) is located in the mounting hole. The mandrel (1) is further pulled by the tensioning member, so that the tapered ball hinge body (2) radially expands the expansion sleeve (5) until the tapered ball hinge body (2) is fixed in the mounting hole.

2. The ball hinge facilitating quick assembly and disassembly according to claim 1, characterized in that: The tensioning member is a nut plate (6). The center of the nut plate (6) has a threaded hole. The tensioning end of the mandrel (1) is provided with an external thread one (101). The diameter of the nut plate (6) is larger than the diameter of the mounting hole. During assembly, the nut plate (6) cooperates with the external thread one (101), and the outer edge area of the nut plate (6) acts on the equipment mounting body (11) outside the periphery of the mounting hole by rotating the mandrel (1) to pull the mandrel (1).

3. The ball hinge facilitating quick assembly and disassembly according to claim 2, characterized in that: The large-diameter end of the expansion sleeve (5) has a radially outward folding and pressing edge (502). The folding and pressing edge (502) is used to press on the equipment mounting body (11) outside the periphery of the mounting hole to resist the force of pulling the mandrel (1).

4. The ball hinge facilitating quick assembly and disassembly according to claim 3, characterized in that: Both ends of the expansion sleeve (5) are respectively provided with an expansion slit one (503) and an expansion slit two (504) that open at the corresponding end. The expansion slit one (503) and the expansion slit two (504) axially extend towards the end where the other opens. The expansion slit one (503) that opens at the large-diameter end includes an opening on the folding and pressing edge (502).

5. The ball hinge facilitating quick assembly and disassembly according to claim 4, characterized in that: The diameter of the expansion sleeve (5) is equal everywhere.

6. The ball hinge facilitating quick assembly and disassembly according to claim 1, characterized in that: The tapered ball hinge body (2) is integrally formed with the mandrel (1).

7. The ball hinge facilitating quick assembly and disassembly according to any one of claims 2 - 5, characterized in that: The tapered ball hinge body (2) includes a tapered outer sleeve (3) and a vulcanized rubber layer (4) vulcanized between the tapered outer sleeve (3) and the mandrel.

8. The ball hinge facilitating quick assembly and disassembly according to claim 7, characterized in that: It also includes a large-diameter pressing plate (7) and a rubber ring one (9). The center of the large-diameter pressing plate (7) is provided with a threaded hole. An external thread two (102) is provided on the outer periphery of the mandrel (1) where the large-diameter end of the tapered ball hinge body (2) is located. During application, the large-diameter pressing plate (7) is installed on this section of the mandrel (1) through the threaded hole in cooperation with the external thread two (102). The rubber ring one (9) is pressed by the large-diameter pressing plate (7) between the large-diameter pressing plate (7) and the large-diameter end of the tapered outer sleeve (3).

9. The ball hinge facilitating quick assembly and disassembly according to claim 7, characterized in that: It also includes a rubber ring two (10). During application, the nut plate (6) presses the rubber ring two (10) on the nut plate (6) and the equipment mounting body (11) outside the mounting hole.

10. The ball hinge facilitating quick assembly and disassembly according to claim 7, characterized in that: It further includes a small-diameter pressing disc (8) capable of pressing the end of the small-diameter end of the conical outer sleeve (3). A threaded hole is provided in the center of the small-diameter pressing disc (8). A cylindrical blind hole (601) is provided in the center of the inner side of the nut disc (6). The assembled small-diameter pressing disc (8) is installed on this section of the mandrel (1) through the threaded hole in cooperation with the external thread I (101), hidden in the cylindrical blind hole (601), and kept at a gap with the conical outer sleeve (3). When disassembling and assembling, it is used to press the end of the small-diameter end of the conical outer sleeve (3) so that the conical outer sleeve (3) can be disengaged.

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