Swing device and universal quick connector

Abstract

The invention relates to the technical field of universal connectors, in particular to a swing device and a universal quick connector. The upper support comprises a first vertical plate and a second vertical plate which are oppositely arranged; an inner gear ring is arranged on the inner wall of the box body; one side of the box body is movably connected with the first vertical plate through a mounting pin shaft; the piston and the transmission shaft are arranged in the box body and are both coaxial with the mounting pin shaft, and the execution piece is connected to the box body; when the piston moves in the axial direction, the box body and the execution piece can be driven to rotate around the installation pin shaft. The box body is movably assembled through the first vertical plate, the transmission shaft is positioned and assembled through the second vertical plate, the assembly process of the transmission shaft can be completed without rotating, and assembly is convenient; and in the axial movement process of the piston, the rotation angle between the piston and the box body and the rotation angle between the piston and the transmission shaft are overlapped to form an actual swing angle, so that a large swing angle is achieved through small axial displacement of the piston, and the overall structure is compact.

Description

Technical Field

[0001] The present invention relates to the technical field of universal connectors, and in particular to a swing device and a universal quick connector. Background Art

[0002] A universal quick coupler, also known as a universal quick coupler or hydraulic wrist, is a device that connects to the front end of an excavator's arm at its upper end and to various attachments at its lower end. It generally consists of an upper bracket and a swinging section, enabling the rotation and swinging of attachments. A universal quick coupler is a core actuator in construction machinery, designed specifically for complex earthmoving operations. It uses hydraulic drive to achieve precise movement of attachments, supporting multi-degree-of-freedom compound motions such as 360° rotation, ±45° to 55° tilt and swing.

[0003] Universal quick-change joints are categorized by the structure of their swing mechanism into push-pull swing and spiral swing cylinder types. The push-pull swing type achieves swing motion by rotating the lower half of the cylinder around a hinge after it is extended or retracted, offering advantages such as a simple structure and low manufacturing cost, but also has disadvantages such as larger dimensions. The spiral swing type achieves swing motion by converting the linear motion of a piston in a double-helix or single-helix cylinder into rotary motion. However, the linear motion of the piston is limited in the swing angle it can achieve, and the assembly of the upper bracket and the swing part is more complex. Summary of the Invention

[0004] The object of the present invention is to provide a swing device and a universal quick connector, in which the box body is movably assembled by a first vertical plate, and the transmission shaft is positioned and assembled by a second vertical plate. The assembly process can be completed without rotating the transmission shaft, and the assembly is relatively convenient; and during the axial movement of the piston, the rotation angles between the piston and the box body and between the piston and the transmission shaft are superimposed to form an actual swing angle, so that a larger swing angle can be achieved through a smaller axial displacement of the piston, and the overall structure is compact.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a swing device comprising: The upper bracket includes a first vertical plate and a second vertical plate that are arranged opposite to each other; The box body has an inner gear ring on its inner wall; one side of the box body is movably connected to the first vertical plate through a mounting pin; The piston and the transmission shaft are arranged in the housing and are coaxial with the mounting pin. The front end outer wall of the piston is connected to the inner gear ring via a first thread. The front end inner wall of the piston is connected to the outer wall of the inner side of the transmission shaft via a second thread with a rotation direction opposite to that of the first thread. The outer end surface of the transmission shaft is positioned and connected to the second vertical plate. The actuator is connected to the box body; when the piston moves axially, it can drive the box body and the actuator to rotate around the mounting pin.

[0006] Optionally, a limiting groove is provided on the inner gear ring, and a screw hole for screwing in a top screw is provided on the box body. The top screw can be screwed into the screw hole and enter the limiting groove to position the inner gear ring at a predetermined position on the inner wall of the box body.

[0007] Optionally, it also includes: The rear end cover is connected to the first side of the box body, and a mounting circular hole is provided on the rear end cover, and a circular hole is provided on the first vertical plate; a mounting bearing is provided in the mounting circular hole; the mounting pin passes through the circular hole and is installed on the mounting bearing to movably connect the box body and the first vertical plate.

[0008] Optionally, a through screw hole for installing an oil nozzle is opened axially on the mounting pin shaft, and the oil nozzle is used to lubricate the mounting bearing.

[0009] Optionally, a circular groove for installing a dust ring is provided on the outer end surface of the rear end cover.

[0010] Optionally, it also includes: A hollow pin shaft, an outer circular hole and a threaded hole connected in a stepped manner are opened on the outer end surface of the transmission shaft, and a flange seat is provided on the second vertical plate; the hollow pin shaft is used to pass through the through hole on the flange seat and be screwed into the outer circular hole; A gland, disposed on the outer side of the flange seat to limit the axial position of the hollow pin shaft; A bolt is used to pass through the pressure cover and the hollow pin and screw into the threaded hole to position and connect the outer end surface of the transmission shaft with the second vertical plate.

[0011] Optionally, it also includes: The front end cover is connected to the second side of the box body; the transmission shaft is formed with a protrusion along the circumferential direction outward, and when the outer end surface of the transmission shaft is positioned and connected with the second vertical plate, the front end cover can be located between the protrusion and the second vertical plate to limit the axial position of the transmission shaft.

[0012] Optionally, the contact end between the front end cover and the protrusion and the contact end between the front end cover and the second vertical plate are both provided with thrust bearings.

[0013] Optionally, a staggered straight groove is provided on the outer end surface of the transmission shaft, and the staggered straight groove is used to lubricate the thrust bearing between the front end cover and the second vertical plate.

[0014] Optionally, the upper bracket also includes oppositely arranged side panels, and the first vertical panel and the second vertical panel are both connected to the lower portion of the side panels; the upper portion of the side panels is used to be connected to the excavator arm; the lower portion of the box body is also provided with a rotating device, and the rotating end of the rotating device is connected to the actuator through a connecting device.

[0015] In a second aspect, the present invention provides a universal quick connector, which includes the swing device.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention flexibly connects the housing and the upper bracket via a first vertical plate, and positions and connects the transmission shaft and the upper bracket via a second vertical plate. The assembly process can be completed without rotating the transmission shaft, making assembly relatively convenient. Furthermore, the transmission shaft fixedly connected to the second vertical plate can serve as the supporting fixed end of the housing, and the mounting pin between the first vertical plate and the housing serves as the supporting rotating end of the housing. The housing can rotate relative to the transmission shaft around the mounting pin under the support of the transmission shaft and the mounting pin. During the axial movement of the piston, the transmission shaft serves as the supporting fixed end to maintain its position. Under the action of the thread, the piston first forms a first rotation angle relative to the transmission shaft. During the rotation of the piston, the housing is driven to rotate by the inner gear ring, and the housing forms a second rotation angle relative to the piston. With the transmission shaft serving as the supporting fixed end as a reference, the rotation angle of the housing carrying the actuator relative to the transmission shaft is the sum of the first rotation angle and the second rotation angle, thereby achieving a larger swing angle using a limited piston stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the connection between the universal quick connector and the excavator in Example 1; Figure 2 for Figure 1 Axonometric drawing of the universal quick connector; Figure 3 for Figure 1 Cross-sectional view of the universal quick connector; Figure 4 for Figure 3 Schematic diagram of the structure of the middle and upper bracket; Figure 5 for Figure 3 Schematic diagram of the structure of the middle swing device; Figure 6 for Figure 3 Schematic diagram of the structure of the middle and rear end covers; Figure 7 for Figure 3 Schematic diagram of the structure of the middle pressure cover; Figure 8 for Figure 3 Schematic diagram of the structure of the hollow pin; Figure 9 for Figure 3 Schematic diagram of the structure of the transmission shaft;.

[0018] Reference numerals in the figure: 1, upper bracket; 101, side plate; 102, first vertical plate; 103, second vertical plate; 101-1, pin hole; 102-1, circular hole; 104, flange seat; 104-1, through hole; 2, box body; 21, first internal space; 22, second internal space; 2-1, screw hole; 3, swing device; 31, piston; 32, inner gear ring; 33, transmission shaft; 34, front end cover; 35, rear end cover; 31-1, external thread structure; 31-2, internal thread structure; 31-3, front end face; 31-4, first end face; 33-1, external spiral structure; 33-2, side plane; 33-3, external circular hole; 33- 4. Threaded hole; 33-5. Second end face; 33-6. Staggered slots; 34-1. Inner surface; 35-1. Chamfer; 35-2. Slots; 35-3. Mounting circular hole; 35-4. Annular groove; 4. Rotating device; 41. Motor; 42. Worm; 43. Worm gear; 5. Connecting device; 6. Finger clamping device; 61. Clamping jaw; 62. Cylinder; 7. Excavator arm; 8. Connecting pin; 9. Mounting pin; 11. Jackscrew; 12. Mounting bearing; 13. Oil nozzle; 14. Dust ring; 15. Hollow pin; 16. Pressure cover; 16-1. Through circular hole; 17. Bolt; 18. First thrust bearing; 19. Second thrust bearing. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Example 1

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0022] Combine Figure 1The present embodiment provides a swing device for a universal quick connector, which includes an upper bracket 1, a housing 2, a piston 31, a transmission shaft 33, and an actuator (or attachment). The upper bracket 1 includes a first vertical plate 102 and a second vertical plate 103 arranged opposite to each other. An inner gear ring 32 is provided on the inner wall of the housing 2. One side of the housing 2 is movably connected to the first vertical plate 102 via a mounting pin 9. The piston 31 and the transmission shaft 33 are disposed within the housing 2 and are both coaxial with the mounting pin 9. The front outer wall of the piston 31 is connected to the inner gear ring 32 via a first thread. The front inner wall of the piston 31 is connected to the inner outer wall of the transmission shaft 33 via a second thread that rotates in the opposite direction to the first thread. The outer end surface of the transmission shaft 33 is positioned and connected to the second vertical plate 103. An actuator (such as a rotating device 4 and a finger clamping device 6) is connected to the housing 2. When the piston 31 moves axially, it can drive the housing 2 and the actuator to swing around the mounting pin 9 relative to the transmission shaft 33.

[0023] First, in this embodiment, the upper bracket 1, housing 2, and transmission shaft 33 are assembled using a first vertical plate 102 and a second vertical plate 103. The transmission shaft 33 is fixed to the second vertical plate 103 as the support and fixed end of the entire housing 2. The housing 2 and the first vertical plate 102 are movably connected by a mounting pin 9, allowing the housing 2 to rotate relative to the transmission shaft 33 around the mounting pin 9, making assembly convenient. Furthermore, during the axial movement of the piston 31, the transmission shaft 33 remains fixedly connected to the second vertical plate 103 of the upper bracket 1. Under the action of the threads, the piston 31 first rotates relative to the transmission shaft 33 to a first angle. During the rotation of the piston 31, the housing 2 is driven by the internal gear ring 32 to rotate, resulting in a second angle of rotation relative to the piston 31. Because the transmission shaft 33 remains fixed, the rotation angle of the housing 2 carrying the actuator relative to the transmission shaft 33 is the sum of the first and second angles, based on the transmission shaft 33. This allows a large swing angle to be achieved within the limited travel range of the piston 31.

[0024] Further explanation in combination with the specific structure, such as Figure 1 、 Figure 2 、 Figure 3 As shown, this embodiment provides a swing device for a universal quick connector, wherein the universal quick connector is composed of an upper bracket 1, a box body 2, a swing device 3, a rotating device 4, a lower connecting device 5, a finger clamping device 6, etc., wherein the finger clamping device 6 is not a necessary component, and the finger clamping device can be flexibly selected according to the customer.

[0025] like Figure 3As shown, the box body 2 is provided with two non-connected spaces, the first internal space 21 at the upper portion is used for installing the swing device part, and the second internal space 22 at the lower portion is used for installing the rotating device.

[0026] like Figure 1 、 Figure 2 、 Figure 3 As shown, the upper part of the upper bracket 1 is connected to the excavator arm 7 through the connecting pin 8, and the lower part is connected to the swing device 3. The rotating device 4 is a worm gear structure, which drives the worm 42 to rotate through the motor 41. The worm 42 engages with the worm wheel 43, thereby driving the worm wheel 43 to rotate. The worm wheel 43 is connected to the lower connecting device 5 through a long bolt, and the rotation of the worm wheel 43 drives the lower connecting device 5 to rotate. The lower part of the connecting device 5 is used to connect different work accessories. The finger clamping device 6 is installed on the connecting device 4. The two clamping claws 61 are respectively controlled by two oil cylinders 62 for clamping objects.

[0027] like Figure 4 As shown, the upper bracket 1 is welded together from two side panels 101, two vertical panels (a first vertical panel 102 and a second vertical panel 103), and a flange mount 104. Each of the two side panels 101 is provided with two pin holes 101-1. The upper bracket 1 is connected to the lower end of the excavator's arm 7 via a connecting pin 8. The first vertical panel 102 is provided with a circular hole 102-1, with the axis X of the circular hole 102-1. The second vertical panel 103 on the other side is connected to the flange mount 104 via a non-detachable mechanism. The flange mount 104 is provided with evenly distributed through-holes 104-1 around its circumference, with the pitch circle of these evenly distributed through-holes 104-1 coinciding with the axis X of the circular hole 102-1.

[0028] like Figure 3 、 Figure 5 As shown, the swing mechanism 3 includes a piston 31, an inner gear ring 32, a transmission shaft 33, a front cover 34, and a rear cover 35. The upper side of the upper bracket 1 is connected to the excavator arm 7 via a detachable connecting pin 8. The first vertical plate 102 of the upper bracket 1 is movably connected to the rear cover 35 of the swing mechanism 3 via a mounting pin 9. The second vertical plate 103 is positioned and connected to the transmission shaft 33 of the swing mechanism via a hollow pin 15. The piston has an external thread structure 31-1 on the outside and an internal thread structure 31-2 on the inside. The external spiral structure 31-1 of the piston cooperates with the internal spiral structure of the inner gear ring 32 in the cylinder of the housing 2. The piston 31 moves axially in a spiral manner under the push of hydraulic pressure. The internal spiral structure 31-2 of the piston 31 cooperates with the external spiral structure of the transmission shaft 33, driving the housing 2 to rotate relative to the transmission shaft to complete the swinging motion.

[0029] like Figure 3As shown, the inner gear ring 32 is non-detachably connected to the housing 2. The housing 2 is provided with at least three screw holes 2-1 distributed around the circumference, and a limiting groove is provided in the center of the outer portion of the inner gear ring 32. A top screw 11 is screwed into the circumferentially distributed screw holes 2-1 on the housing 2 and then presses into the limiting groove of the inner gear ring 32. In this embodiment, the radial and axial positions of the inner gear ring 32 can be determined by using at least three top screws 11. After the inner gear ring 32 is positioned, it is welded to the housing 2 as a whole. The screw holes 2-1 of the external top screw 11 are welded or plugged to prevent leakage of hydraulic oil.

[0030] like Figure 3 、 Figure 5 As shown, an external thread structure 31-1 is provided on the outside of the piston 31, and an internal thread structure 31-2 is provided on the inside. The internal and external thread structures have different rotation directions. For example, the external thread structure 31-1 is left-handed, and the internal thread structure 31-2 is right-handed. This design of different rotation directions of the internal and external spiral structures makes the relative rotation angle between the box body 2 and the piston 31, and the relative rotation angle between the piston 31 and the transmission shaft 33, the two rotation angles are positively superimposed, so that a smaller axial displacement of the piston can make the box body 2 relative to the transmission shaft 33 (the transmission shaft 33 is connected to the second vertical plate 103 and remains stationary) achieve a larger rotational swing, thereby ensuring that the structure is relatively compact and a larger swing angle can be achieved.

[0031] like Figure 6 As shown, the inner end surface of the rear end cap 35 is provided with a chamfer 35-1 and a slot 35-2. This facilitates the contact between the inner end surface of the piston and the inner surface of the rear end cap 35. Hydraulic oil can enter the connection between the piston 31 and the rear end cap 35 through the chamfer 35-1 and the slot 35-2, thereby driving the piston. When pushed by the hydraulic oil, the piston 31, constrained by the internal gear ring 32, performs a spiral axial movement. This is a superposition of axial movement and axial rotation. The hydraulic pressure drives the piston 31 to move axially in a spiral manner, driving the housing 2 to oscillate.

[0032] like Figure 5 As shown, the swing angle of the swing mechanism 3 is determined by the axial travel distance of the piston 31 and the pitch angle of the internal and external helical structures of the piston 31. The axial travel distance of the piston 31 is limited by the front end face 31-3 of the piston 31 and the inner surface 33-2 of the protruding portion of the transmission shaft. The distance between the front end face 31-3 and the inner surface 33-2 of the transmission shaft is a. The limit position is when the rear end face of the piston abuts the inner end face of the rear end cover. a is the axial travel distance of the piston. a and the pitch angle of the internal and external threads of the piston jointly determine the swing angle of the housing 2.

[0033] like Figure 3As shown, a mounting circular hole 35-3 (not through) and an annular groove 35-4 are provided on the outer side of the rear end cover 35. The mounting circular hole 35-3 cooperates with the mounting pin 9. The mounting pin 9 is fixed to the upper bracket 1 by bolts. The mounting pin 9 serves as a hinge pin for the rotation of the upper bracket 1 (first vertical plate 102) and the swing device (rear end cover). A mounting bearing 12 is provided between the mounting pin 9 and the mounting circular hole 35-3 of the rear end cover 35. A through screw hole is provided in the center of the mounting pin 9 for installing an oil nozzle 13. Grease can lubricate the mounting bearing 12 through the oil nozzle.

[0034] like Figure 3 As shown, there is a certain gap between the rear end cover 35 and the first vertical plate 102 of the upper bracket 1. This gap can facilitate the assembly between the upper bracket 1 and the swing device, and this gap allows the mounting bearing 12 to be exposed. By installing a dust ring 14 in the annular groove 35-4 on the rear end cover 35, dust can be prevented from entering the mounting bearing 12, thereby increasing the service life of the bearing.

[0035] like Figure 5 As shown, one side of the transmission shaft 33 is provided with an external spiral structure 33-1 that mates with the piston 31. The outer end surface of the transmission shaft 33 is provided with a circumferentially distributed, non-through stepped circular hole. The pitch circle and number of the stepped circular holes match those of the through-holes 104-1 in the flange seat 104 of the upper bracket 1. The evenly distributed stepped circular holes on the transmission shaft 33 are arranged as a two-stage stepped hole system, comprising threaded holes and outer circular holes connected in a stepped manner. The diameter of the first-stage outer circular hole 33-3 matches that of the flange seat through-hole 104-1. The inner side of the second-stage outer circular hole 33-4 has a threaded hole with a nominal diameter smaller than that of the first-stage outer circular hole 33-3.

[0036] like Figure 3 As shown, the hollow pin shaft 15 with a variable diameter passes through the circumferentially evenly distributed through holes 104-1 on the flange seat 104 of the upper bracket 1, and further passes through the primary outer circular hole 33-3 of the transmission shaft 33. The length c1 of the hollow pin shaft 15 is slightly smaller than the sum of the depth c2 of the flange seat circular hole 104-1 and the depth c3 of the primary outer circular hole 33-3 of the transmission shaft.

[0037] like Figure 3 、 Figure 7As shown, the gland 16 is a circular plate with through-holes 16-1 evenly distributed around the circumference. The pitch diameter and number of the through-holes 16-1 are consistent with the through-holes 104-1 evenly distributed on the flange seat. The gland 16 is placed outside the flange seat 104 to prevent axial movement of the hollow pin 15. Bolts 17 are inserted through the through-holes 16-1 of the gland 16. The bolts 17 pass through the through-holes 16-1 and the primary outer hole 33-3 on the transmission shaft 33, and connect with the secondary inner threaded hole 33-4 on the transmission shaft 33. The diameter of the through-holes 16-1 on the gland 16 should be slightly smaller than the outer diameter of the hollow pin 15 and slightly larger than the nominal diameter of the bolts 17.

[0038] like Figure 8 As shown, the variable-diameter hollow pin 15 is a metal circular tube with a slotted or other opening. This opening allows for diameter flexibility to facilitate assembly and torque transmission. The initial diameter of the hollow pin 15 should be slightly larger than the diameters of the through-hole 104-1 of the flange seat 104 and the outer circular hole 33-3 of the drive shaft 33. After insertion, the hollow pin 15 adapts to the diameter of the corresponding holes through its own structural elasticity.

[0039] like Figure 3 、 Figure 5 As shown, the transmission shaft 33's only mode of motion is rotation, with its axial movement limited by the mechanical structure. First, in the positive X-axis direction, the transmission shaft 33 is restrained by the inner surface 34-1 of the front end cover 34. A first thrust bearing 18 is positioned between the inner surface 34-1 of the front end cover and the transmission shaft to reduce wear. Second, in the negative X-axis direction, the flange seat 104 is bolted to the transmission shaft 33. Movement of the piston 31 in the negative X-axis direction drives the transmission shaft 33 and the flange seat 104 in the negative X-axis direction. A second thrust bearing 19 is positioned between the inner side of the flange seat 104 and the outer side of the front end cover 34. When the flange seat 104 moves in the negative X-axis direction, it is blocked by the second thrust bearing 19 on the outer side of the front end cover 34, limiting its negative X-axis movement.

[0040] like Figure 5 As shown, the maximum distance b between the first end surface 31-4 inside the piston 31 and the second end surface 33-5 inside the transmission shaft 33 is required to be greater than a to ensure the swing range of the swing device. Figure 9 As shown, the outer side of the transmission shaft 33 is provided with staggered slots 33-6, which enable lubrication of the second thrust bearing 19 between the outer side of the front cover 34 and the inner side of the flange seat 104. A marking with an angle resolution is provided on the outer side of the transmission shaft 33 to determine the relative angle between the transmission shaft and the housing, ensuring ease of assembly.

[0041] In summary, in this embodiment, the swing torque is constant through the design of the double-helix oil cylinder, and the swing angle of the box body 2 is the superposition of the swing angle between the cylinder of the box body 2 and the piston 31, and the swing angle between the piston 31 and the transmission shaft 33, so that a larger swing angle is achieved through a smaller axial displacement of the piston 31, and the structure is compact; in this embodiment, the upper bracket 1 and the lower swing part are supported by the installation pin 9 and the elastic hollow pin to transmit torque, and the transmission shaft does not need to be rotated to complete the assembly process, and the assembly process is simple. Example 2

[0042] Based on the same inventive concept as in Example 1, this embodiment provides a universal quick connector, including the swing device described in Example 1.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A swing device, characterized in that: include: The upper bracket (1) comprises a first vertical plate (102) and a second vertical plate (103) arranged opposite to each other; The box body (2) has an inner gear ring (32) on its inner wall; one side of the box body (2) is movably connected to the first vertical plate (102) via a mounting pin (9); The piston (31) and the transmission shaft (33) are arranged in the housing (2) and are coaxial with the mounting pin (9). The front end outer wall of the piston (31) is connected to the inner gear ring (32) via a first thread. The front end inner wall of the piston (31) is connected to the inner outer wall of the transmission shaft (33) via a second thread having a rotation direction opposite to that of the first thread. The outer end surface of the transmission shaft (33) is positioned and connected to the second vertical plate (103). An actuator is connected to the housing (2); when the piston (31) moves axially, it can drive the housing (2) and the actuator to rotate around the mounting pin (9).

2. The swing device according to claim 1, characterized in that A limiting groove is provided on the inner gear ring (32), and a screw hole (2-1) for screwing in a top screw (11) is provided on the box body (2). The top screw (11) can be screwed into the screw hole (2-1) and enter the limiting groove to position the inner gear ring (32) at a predetermined position on the inner wall of the box body (2).

3. The swing device according to claim 1, characterized in that Also includes: A rear end cover (35) is connected to the first side of the box body (2); a mounting circular hole (35-3) is provided on the rear end cover (35); a circular hole (102-1) is provided on the first vertical plate (102); a mounting bearing (12) is provided in the mounting circular hole (35-3); and the mounting pin (9) passes through the circular hole (102-1) and is mounted on the mounting bearing (12) to movably connect the box body (2) and the first vertical plate (102).

4. The swing device according to claim 3, characterized in that A through screw hole for installing an oil nozzle (13) is provided in the axial direction on the mounting pin shaft (9), and the oil nozzle (13) is used to lubricate the mounting bearing (12).

5. The swing device according to claim 3, characterized in that: A circular groove (35-4) for mounting a dust ring (14) is provided on the outer end surface of the rear end cover (35).

6. The swing device according to claim 1, characterized in that Also includes: A hollow pin shaft (15), an outer circular hole (33-3) and a threaded hole (33-4) connected in a stepped manner are provided on the outer end surface of the transmission shaft (33), and a flange seat (104) is provided on the second vertical plate (103); the hollow pin shaft (15) is used to pass through the through hole (104-1) on the flange seat (104) and be screwed into the outer circular hole (33-3); A pressure cover (16) is provided on the outside of the flange seat (104) to limit the axial position of the hollow pin shaft (15); A bolt (17) is used to pass through the pressure cover (16) and the hollow pin shaft (15) and be screwed into the threaded hole (33-4) to position and connect the outer end surface of the transmission shaft (33) with the second vertical plate (103).

7. The oscillating device according to claim 6, characterized in that Also includes: A front end cover (34) is connected to the second side of the box body (2); the transmission shaft (33) is formed with a protrusion outwardly along the circumferential direction, and when the outer end surface of the transmission shaft (33) is positioned and connected to the second vertical plate (103), the front end cover (34) can be located between the protrusion and the second vertical plate (103) to limit the axial position of the transmission shaft (33).

8. The oscillating device according to claim 7, characterized in that The contact ends of the front end cover (34) and the protrusion, as well as the contact ends of the front end cover (34) and the second vertical plate (103), are both provided with thrust bearings; and staggered straight grooves (33-6) are provided on the outer end surface of the transmission shaft (33), and the staggered straight grooves (33-6) are used to lubricate the thrust bearings between the front end cover (34) and the second vertical plate (103).

9. The swing device according to claim 1, characterized in that The upper bracket (1) further comprises side plates (101) arranged opposite to each other, the first vertical plate (102) and the second vertical plate (103) being connected to the lower portion of the side plates (101); the upper portion of the side plates (101) is used to be connected to the excavator arm (7); the lower portion of the box body (2) is further provided with a rotating device (4), the rotating end of the rotating device (4) being connected to the actuator via a connecting device (5).

10. A universal quick connector, characterized in that: The invention comprises the swing device according to any one of claims 1 to 9.

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