Joint assembly

Abstract

The utility model relates to joint connecting piece technical field, concretely points to a joint assembly, including fixed link and adjusting lever, be equipped with axle joint on the fixed link, be equipped with the active head on the adjusting lever, be equipped with one way bearing on the active head, the outer ring fixed connection active head of one way bearing, be equipped with the rotating shaft in the axle joint, and the inner ring cooperation and connection of one way bearing are connected with the rotating shaft, be equipped with the clutch device on the axle joint, and the clutch device is connected with the rotating shaft, thereby making active head can rotate clockwise on the rotating shaft, or drive rotating shaft anticlockwise rotate on the axle joint, the utility model discloses reasonable structure, when adjusting lever anticlockwise adjustment, active head drives rotating shaft integral rotation through one way bearing, and adjusting lever needs to overcome the resistance of clutch device to rotating shaft to be able to rotate relative to fixed link, and the control angle adjustment range and realize joint self -locking, and active head can rotate freely along clockwise directly on the rotating shaft through one way bearing, and can be easily reset and use flexible.

Description

Technical Field

[0001] This utility model relates to the field of joint connector technology, specifically a joint assembly. Background Technology

[0002] With economic development and improved living standards, various physiotherapy devices and appliances have emerged. Through various drug and physical therapies, they relieve fatigue and treat various diseases, effectively improving people's quality of life. In current physiotherapy scenarios such as moxibustion and infrared therapy, patients typically receive treatment in a fixed position, such as sitting or lying down. The instrument's functional head needs to be aimed at the treatment area, thus often requiring frequent adjustments to the height and angle of the physiotherapy equipment to align with the treatment site.

[0003] The hinged joints used in existing physiotherapy devices primarily employ nuts and screws to fasten two joints together. An elastic washer is placed between the nut and screw, and the sliding friction between the joints is controlled by the tightening force of the nut. This makes the device difficult to adjust, and the joints are prone to loosening after multiple adjustments. Frequent adjustments of the nut are necessary to change the tightness between the joint heads, making it very inconvenient to use.

[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a joint assembly that is structurally sound, flexibly adjustable in angle, and easy to operate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The present invention discloses a joint assembly comprising a fixed rod and an adjusting rod. The fixed rod is provided with a shaft joint, and the adjusting rod is provided with a movable head. The movable head is provided with a one-way bearing, the outer ring of which is fixedly connected to the movable head. A rotating shaft passes through the shaft joint and is connected to the inner ring of the one-way bearing. The shaft joint is provided with a clutch device, which is connected to the rotating shaft, thereby allowing the movable head to rotate clockwise on the rotating shaft or to drive the rotating shaft to rotate counterclockwise on the shaft joint.

[0008] According to the above scheme, a rotary groove is vertically opened on the upper edge of the shaft joint, and the movable head is rotatably inserted into the rotary groove; a central through hole is horizontally opened on the upper edge of the shaft joint, the central through hole passes through the rotary groove and is concentrically arranged with the one-way bearing; the rotating shaft passes through the central through hole and the inner ring of the one-way bearing, and the rotating shaft is connected to the clutch device.

[0009] According to the above scheme, the shaft joint includes a first housing and a second housing, which are respectively located on both sides of the rotary groove; the central through hole penetrates the first housing to form a first limiting hole on the first housing, and the first end of the rotating shaft passes through the first limiting hole; the central through hole penetrates the second housing to form a second limiting hole on the second housing, and the second end of the rotating shaft passes through the second limiting hole.

[0010] According to the above scheme, the clutch device includes a friction disc, a damping disc, guide posts, and a spring. The friction disc is rotatably disposed in the first housing, and the first end of the rotating shaft passes through the first limiting hole to be fixedly connected to the friction disc. The first housing is provided with a plurality of guide posts, which are arranged laterally and fixedly connected to the first housing. The damping disc is slidably mounted on the plurality of guide posts. The first end of the spring contacts the inner wall of the first housing, and the second end of the spring contacts the damping disc, thereby pairing the damping disc with the friction disc to form a clutch connection.

[0011] According to the above scheme, the mating surface of the friction disk is provided with hysteresis teeth, the mating surface of the damping disk is provided with a toothed disk, and the spring touches the damping disk and moves towards the friction disk so that the toothed disk meshes with the hysteresis teeth.

[0012] According to the above scheme, the clutch device also includes an adjusting nut, and a tensioning screw is provided on the second end of the rotating shaft. The tensioning screw passes through the second limiting hole and is thus set in the inner cavity of the second housing. The adjusting nut is assembled on the tensioning screw, and a gasket structure is provided between the adjusting nut and the inner wall of the second housing.

[0013] According to the above scheme, the rotating shaft is provided with a keyway, and a transmission key that can slide laterally along the keyway is provided with the keyway. The transmission key is fixedly connected to the inner ring of the one-way bearing, so that the rotating shaft can rotate as a whole with the inner ring of the one-way bearing.

[0014] According to the above scheme, the second housing is provided with a cover plate, and the cover plate is provided with an opening and a soft rubber plug.

[0015] The beneficial effects of this utility model are as follows: This utility model has a reasonable structure. A one-way bearing is set between the movable head and the rotating shaft, and a clutch device is set between the rotating shaft and the shaft seat. When the adjusting rod is adjusted counterclockwise, the movable head drives the rotating shaft to rotate as a whole through the one-way bearing. The adjusting rod needs to overcome the resistance of the clutch device on the rotating shaft in order to rotate relative to the fixed rod, thereby controlling the range of angle adjustment and realizing joint self-locking. When the adjusting rod is adjusted clockwise, the movable head can rotate freely on the rotating shaft directly clockwise through the one-way bearing. The adjusting rod can be easily reset for readjustment, making it flexible and convenient to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the shaft joint and the hinge head of this utility model;

[0018] Figure 3 This is a schematic diagram of the disassembled structure of this utility model.

[0019] In the picture:

[0020] 1. Shaft joint; 2. Hinged head; 3. First housing; 4. Second housing; 10. Fixed rod; 11. Rotating shaft; 12. Rotary groove; 13. Friction disc; 14. Delay gear; 15. Tightening screw; 16. Keyway; 20. Adjusting rod; 21. One-way bearing; 22. Transmission key; 31. First limiting hole; 32. Damping disc; 33. Guide post; 34. Spring; 35. Gear disc; 41. Second limiting hole; 42. Adjusting nut; 43. Cover plate; 44. Soft rubber plug. Detailed Implementation

[0021] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1-3 As shown, the joint assembly of this utility model includes a fixed rod 10 and an adjusting rod 20. The fixed rod 10 is provided with a shaft joint 1, and the adjusting rod 20 is provided with a movable head 2. The movable head 2 is provided with a one-way bearing 21, and the outer ring of the one-way bearing 21 is fixedly connected to the movable head 2. A rotating shaft 11 is passed through the shaft joint 1, and the rotating shaft 11 is connected to the inner ring of the one-way bearing 21. The shaft joint 1 is provided with a clutch device, which is connected to the rotating shaft 11, so that the movable head 2 can rotate clockwise on the rotating shaft 11, or drive the rotating shaft 11 to rotate counterclockwise on the shaft joint 1.

[0023] As is known, the one-way bearing 21 refers to a mechanical component that can only rotate in one direction between the outer ring and the inner ring. The one-way bearing 21 is fixedly mounted on the hinge head 2. Generally speaking, the hinge head 2 has a hole for mounting the one-way bearing 21. The one-way bearing 21 and the hinge head 2 can be an interference fit or a keyway connection to achieve assembly.

[0024] The rotating shaft 11 can be inserted into the inner ring of the one-way bearing 21. Of course, the one-way shaft 21 and the rotating shaft 11 can also be connected by a keyway, so that the movable head 2 and the rotating shaft 11 form a clockwise rotational fit and a counterclockwise transmission connection.

[0025] The fixed rod 10 is equivalent to the main body of the equipment. The adjusting rod 20 is connected to the functional components and needs to be adjusted at an angle relative to the fixed rod 10 or the main body of the equipment. Of course, the fixed rod 10 can also rotate relative to the main body of the equipment. The specific method will not be described here.

[0026] Specifically, clockwise rotation of the adjustable head 2 corresponds to the reset action of the adjusting rod 20 relative to the fixed rod 10, at which time the one-way bearing 21 can rotate freely. Counterclockwise rotation of the adjustable head 2 corresponds to the angle adjustment action of the adjusting rod 20 relative to the fixed rod 10, at which time the one-way bearing 21 cannot rotate, that is, the adjustable head 2 needs to drive the rotating shaft 11 to rotate as a whole on the shaft joint 1.

[0027] Furthermore, a clutch device is provided between the rotating shaft 11 and the shaft joint 1. The clutch device provides resistance to keep the adjusting rod 20 and the fixed rod 10 in a self-locking and stable state. When the adjusting rod 20 is subjected to an external force in the counterclockwise direction, the movable head 2 and the rotating shaft 11 can only rotate by overcoming the resistance of the clutch device. The rotating shaft 11 is always subjected to this resistance during its rotation, which makes the angle adjustment have a jerky feel and prevents the angle adjustment range from being too large. Of course, if the angle of the adjusting rod 20 is adjusted too large, it can be rotated clockwise by a certain angle. At this time, the rotational freedom provided by the one-way bearing 21 makes the reset adjustment relatively easy.

[0028] The shaft joint 1 has a vertically formed rotary groove 12, and the movable head 2 is rotatably inserted into the rotary groove 12; the shaft joint 1 has a horizontally formed central through hole, which passes through the rotary groove 12 and is concentrically arranged with the one-way bearing 21; the rotating shaft 11 passes through the central through hole and the inner ring of the one-way bearing 21, and the rotating shaft 11 is connected to the clutch device.

[0029] Furthermore, the shaft joint 1 includes a first housing 3 and a second housing 4, which are respectively disposed on both sides of the rotary groove 12. The first housing 3, the second housing 4, and the shaft joint 1 are integral structures, and the first housing 3 and the second housing 4 are paired to form the rotary groove 12 on the shaft joint 1. The central through hole penetrates the first housing 3 to form a first limiting hole 31 on the first housing 3, and the first end of the rotating shaft 11 passes through the first limiting hole 31. The central through hole penetrates the second housing 4 to form a second limiting hole 41 on the second housing 4, and the second end of the rotating shaft 11 passes through the second limiting hole 41.

[0030] It is understood that the rotating shaft 11 passes through the central through hole of the shaft joint 1 to form a rotational fit, and the rotating shaft 11 and the shaft joint 1 are in a hole-shaft fit, which can have a gap to produce lateral sliding. That is, the rotating shaft 11 forms a hole-shaft connection with the first limiting hole 31 and the second limiting hole 41 respectively.

[0031] The clutch device includes a friction disc 13, a damping disc 32, guide posts 33, and a spring 34. The friction disc 13 is rotatably disposed within the first housing 3. The first end of the rotating shaft 11 passes through the first limiting hole 31 and is fixedly connected to the friction disc 13. The first housing 3 is provided with a plurality of guide posts 33, which are arranged laterally and fixedly connected to the first housing 3. The damping disc 32 is slidably mounted on the guide posts 33. The first end of the spring 34 contacts the inner wall of the first housing 3, and the second end of the spring 34 contacts the damping disc 32, thereby pairing the damping disc 32 with the friction disc 13 to form a clutch connection. The spring 34 provides elastic potential energy, causing the damping disc 32 and the friction disc 13 to cooperate and generate resistance, which can lock the rotational degree of freedom of the rotating shaft 11. As described above, the rotating shaft 11 can slide laterally along the central through hole on the shaft joint 1. The damping disc 32 fits against the inner wall of the first housing 3, restricting the lateral displacement freedom of the rotating shaft 11, so that the spring 34 can drive the damping disc 32 to fit against the friction plate 13 to form a clutch connection. It can be understood that this clutch connection can be overcome under a certain external force, causing the rotating shaft 11 to rotate relative to the shaft joint 1. That is, the user can drive the movable head 2 through the adjusting rod 20, which will drive the one-way bearing 21 and the rotating shaft 11 to rotate counterclockwise.

[0032] Preferably, the mating surface of the friction disk 13 is provided with hysteresis teeth 14, and the mating surface of the damping disk 32 of the hysteresis teeth 14 is provided with a toothed disk 35. The spring 34 pushes against the damping disk 32 and moves towards the friction disk 13, thereby causing the toothed disk 35 to mesh with the hysteresis teeth 14. The friction disk 13 is provided with at least two hysteresis teeth 14 for meshing with the toothed disk 35, so that a clutch-engagement connection is formed between the friction disk 13 and the damping disk 32.

[0033] The clutch device also includes an adjusting nut 42. A tensioning screw 15 is provided on the second end of the rotating shaft 11, passing through the second limiting hole 41 and thus positioned within the inner cavity of the second housing 4. The adjusting nut 42 is mounted on the tensioning screw 15, and a gasket structure is provided between the adjusting nut 42 and the inner wall of the second housing 4. The adjusting nut 42 can adjust the lateral position of the rotating shaft 11 to control the friction disc 13 to move towards or away from the damping disc 32. It is understood that when the friction disc 13 moves towards the damping disc 32, it is equivalent to compressing the spring 34 to provide greater damping force, and vice versa.

[0034] The rotating shaft 11 is provided with a keyway 16, and a transmission key 22 that can slide laterally along the keyway 16 is provided with the keyway 16. The transmission key 22 is fixedly connected to the inner ring of the one-way bearing 21, so that the rotating shaft 11 can rotate integrally with the inner ring of the one-way bearing 21. The rotating shaft 11 forms a rotatable connection with the one-way bearing 21 through the cooperation of the keyway 16 and the transmission key 22, and the rotating shaft 11 can be displaced laterally relative to the one-way bearing 21 to adjust the damping force of the clutch device.

[0035] The second housing 4 is provided with a cover plate 43, which has an opening and a soft rubber plug 44. The soft rubber plug 44 is used to close the opening on the cover plate 43. Removing the soft rubber plug 44 allows the adjusting nut 42 inside the second housing 4 to be adjusted, thereby adjusting the tightness of the joint assembly.

[0036] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A joint assembly, comprising a fixed rod (10) and an adjusting rod (20), wherein the fixed rod (10) is provided with a shaft joint (1), and the adjusting rod (20) is provided with a movable head (2); characterized in that: The swivel head (2) is provided with a one-way bearing (21), and the outer ring of the one-way bearing (21) is fixedly connected to the swivel head (2); a rotating shaft (11) is provided on the shaft joint (1), and the rotating shaft (11) is connected to the inner ring of the one-way bearing (21). The shaft joint (1) is provided with a clutch device, and the clutch device is connected to the rotating shaft (11), so that the swivel head (2) can rotate clockwise on the rotating shaft (11), or drive the rotating shaft (11) to rotate counterclockwise on the shaft joint (1).

2. The joint assembly according to claim 1, characterized in that: The shaft joint (1) has a vertically oriented rotary slot (12) on its upper edge, and the movable head (2) is rotatably inserted into the rotary slot (12); the shaft joint (1) has a horizontally oriented central through hole on its upper edge, which passes through the rotary slot (12) and is concentrically arranged with the one-way bearing (21); the rotating shaft (11) passes through the central through hole and the inner ring of the one-way bearing (21), and the rotating shaft (11) is connected to the clutch device.

3. The joint assembly according to claim 2, characterized in that: The shaft joint (1) includes a first housing (3) and a second housing (4), which are respectively located on both sides of the rotary slot (12); the central through hole penetrates the first housing (3) to form a first limiting hole (31) on the first housing (3), and the first end of the rotating shaft (11) passes through the first limiting hole (31); the central through hole penetrates the second housing (4) to form a second limiting hole (41) on the second housing (4), and the second end of the rotating shaft (11) passes through the second limiting hole (41).

4. The joint assembly according to claim 2, characterized in that: The clutch device includes a friction disc (13), a damping disc (32), a guide post (33), and a spring (34). The friction disc (13) is rotatably disposed in the first housing (3). The first end of the rotating shaft (11) passes through the first limiting hole (31) and is fixedly connected to the friction disc (13). The first housing (3) is provided with a plurality of guide posts (33), which are arranged laterally and fixedly connected to the first housing (3). The damping disc (32) is slidably mounted on the plurality of guide posts (33). The first end of the spring (34) contacts the inner wall of the first housing (3), and the second end of the spring (34) contacts the damping disc (32), thereby pairing the damping disc (32) with the friction disc (13) to form a clutch connection.

5. The joint assembly according to claim 4, characterized in that: The friction disc (13) has a hysteresis tooth (14) on its mating surface, and the damping disc (32) has a toothed disc (35) on its mating surface. The spring (34) touches the damping disc (32) and tends to the friction disc (13), so that the toothed disc (35) meshes with the hysteresis tooth (14).

6. The joint assembly according to claim 2, characterized in that: The clutch device also includes an adjusting nut (42), and a tensioning screw (15) is provided on the second end of the rotating shaft (11). The tensioning screw (15) passes through the second limiting hole (41) and is thus set in the inner cavity of the second housing (4). The adjusting nut (42) is assembled on the tensioning screw (15), and a gasket structure is provided between the adjusting nut (42) and the inner wall of the second housing (4).

7. The joint assembly according to claim 6, characterized in that: The rotating shaft (11) is provided with a keyway (16), and a transmission key (22) that can slide laterally is provided on the keyway (16). The transmission key (22) is fixedly connected to the inner ring of the one-way bearing (21), so that the rotating shaft (11) can rotate integrally with the inner ring of the one-way bearing (21).

8. The joint assembly according to claim 6, characterized in that: The second housing (4) is provided with a cover plate (43), and the cover plate (43) is provided with an opening and a soft rubber plug (44).

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