Compound oscillating cylinder

Abstract

The application provides a composite swing cylinder, which comprises a swing cylinder, a rotating connecting plate, a linear cylinder assembly, a balance valve and a spline connecting shaft, the swing cylinder is provided with a swing cylinder barrel, an inner gear ring is fixedly arranged in the inner cavity of the swing cylinder barrel, the inner surface of the inner gear ring is provided with an inner tooth ring inclined inner tooth, and an inner shaft assembly is coaxially arranged in the inner portion of the inner gear ring. The composite swing cylinder integrates the horizontal moving linear oil cylinder into the swing oil cylinder, can realize the angular rotation in the up-down direction and the position movement in the left-right direction, shortens the overall length of the device, has simple structure design, improves the reliability of the device and the convenience of maintenance, and can be widely applied to the swing cylinder technical field.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of swing cylinder, in particular to a composite swing cylinder. BACKGROUND

[0002] The swing hydraulic cylinder adopts a combined spiral tooth structure, and a larger torque can be generated in a smaller space. Under the action of the hydraulic pressure in the rotating sleeve, the piston moves linearly and rotates, and the spiral rod with the output shaft also rotates, so that the swing movement is realized. The existing swing hydraulic cylinder can only rotate and swing, and cannot move horizontally. When horizontal movement is required, the traditional structure is to connect a linear oil cylinder and a slide rail. This design structure occupies a large space and has poor stability. SUMMARY

[0003] The present application provides a composite swing cylinder, which integrates the linear oil cylinder for horizontal movement into the swing oil cylinder, can realize angle rotation in the up-down direction and position movement in the left-right direction, shortens the overall length of the device, has a simple structure design, and improves the reliability and maintenance convenience of the device.

[0004] Therefore, the technical scheme of the present application is a composite swing cylinder, which comprises a swing cylinder, a rotating connecting plate, a linear cylinder assembly, a balance valve and a spline connecting shaft, the swing cylinder is provided with a swing cylinder barrel body, a cylinder barrel body fixing member is fixedly arranged on the outer surface of the swing cylinder barrel body, an internal gear ring is fixedly arranged on the inner surface of the inner cavity of the swing cylinder barrel body, an internal gear ring inclined internal tooth is arranged on the inner surface of the internal gear ring, and an internal shaft assembly is coaxially arranged in the internal gear ring.

[0005] The internal shaft assembly comprises a circular shaft section, a threaded shaft section, a linear cylinder shaft section and a connecting shaft section, the circular shaft section and the threaded shaft section are located in the interior of the swing cylinder, the outer surface of the threaded shaft section is provided with an internal shaft inclined external tooth, the linear cylinder shaft section is located in the interior of the linear cylinder assembly, the connecting shaft section is located between the swing cylinder and the linear cylinder assembly, the connecting shaft section is provided with a linear cylinder left oil hole and a linear cylinder right oil hole, the right side of the linear cylinder left oil hole is communicated with a linear cylinder left oil pipe, and the right end of the linear cylinder right oil hole is sequentially communicated with a right first oil pipe and a right second oil pipe.

[0006] The intermediate sleeve is coaxially arranged between the inner shaft assembly and the inner gear ring, the inner surface of the right end of the intermediate sleeve is provided with an intermediate sleeve oblique inner tooth, the outer surface of the right end of the intermediate sleeve is provided with an intermediate sleeve oblique outer tooth, the intermediate sleeve oblique inner tooth of the intermediate sleeve is meshed with the inner shaft oblique outer tooth, the intermediate sleeve oblique outer tooth of the intermediate sleeve is meshed with the inner gear ring oblique inner tooth of the inner gear ring, the outer surface of the left end of the intermediate sleeve is provided with an outer guide belt and an outer sealing ring, the left end of the intermediate sleeve is slidably connected with the swing cylinder body through the outer guide belt, the inner surface of the left end of the intermediate sleeve is provided with an inner guide belt and an inner sealing ring, and the left end of the intermediate sleeve is slidably connected with the circular shaft segment through the inner guide belt;

[0007] The left end cover and the right end cover are respectively arranged at the left end and the right end of the swing cylinder body, the end cover guide belt and the end cover sealing ring are arranged between the left end cover and the swing cylinder body, the left end cover is rotatably connected with the swing cylinder body through the end cover guide belt, the left end cover is fixedly connected with the circular shaft segment, the left end cover, the inner shaft assembly, the swing cylinder body and the intermediate sleeve form a right oil cavity, the right end of the swing cylinder body is provided with a right oil hole, the right oil hole is communicated with the right oil cavity, the end cover sealing ring is arranged between the right end cover and the swing cylinder body, the thrust washer is arranged between the right end cover and the inner shaft assembly, the right end cover is sealingly and rotatably connected with the inner shaft assembly, and the right end cover, the inner shaft assembly, the swing cylinder body and the intermediate sleeve form a left oil cavity.

[0008] The outer surface of the linear cylinder shaft segment is provided with a connecting spline, the outer side of the linear cylinder shaft segment is provided with a rotary connection plate, the rotary connection plate is slidably connected with the linear cylinder shaft segment through the spline, the right side of the rotary connection plate is fixedly provided with a linear cylinder assembly, the linear cylinder assembly comprises a linear cylinder body, a piston, a piston sleeve and a linear cylinder end cover, the linear cylinder assembly is fixedly connected with the rotary connection plate through the linear cylinder body, the linear cylinder end cover is fixedly connected with the right end of the linear cylinder shaft segment, the inner portion of the linear cylinder shaft segment is coaxially provided with the piston, the outer surface of the right end of the piston is spirally fixedly provided with the piston sleeve, the outer surface of the piston sleeve is provided with a piston outer guide belt and a piston outer sealing ring, the piston sleeve is slidably connected with the linear cylinder shaft segment through the piston outer guide belt, the left end of the piston penetrates through the linear cylinder end cover, the inner surface of the linear cylinder end cover is provided with a piston inner guide belt and a piston inner sealing ring, the piston is slidably connected with the linear cylinder end cover through the piston inner guide belt, the left end of the piston is fixedly connected with the linear cylinder body, and the piston sleeve, the linear cylinder shaft segment and the linear cylinder end cover form a right oil cavity.

[0009] The left end of the left end cover is fixedly provided with a spline connection shaft, the left end of the rotary connection plate is slidably connected with the spline connection shaft, and the right end of the rotary connection plate is slidably connected with the linear cylinder shaft segment.

[0010] The right end of the piston is provided with a plurality of damping holes.

[0011] The balance valve is arranged on the outer surface of the swing cylinder body, one oil port of the balance valve is communicated with the left oil hole through the balance valve connecting pipe, and the other oil port of the balance valve is communicated with the right oil hole.

[0012] Preferably, the left end of the upper surface of the piston sleeve is provided with a damping chamfer.

[0013] Preferably, the left-right direction moving distance of the rotary connecting plate is 0-50mm.

[0014] Preferably, the up-down direction rotation angle of the rotary connecting plate is ±90 degrees.

[0015] Preferably, the circular shaft section, the threaded shaft section, the linear cylinder shaft section and the connecting shaft section are integrally machined.

[0016] Preferably, the outer sealing ring, the inner sealing ring, the end cover sealing ring, the piston outer sealing ring and the piston inner sealing ring are lip-shaped sealing rings.

[0017] The beneficial effects of the present application are that when the linear cylinder assembly works, hydraulic oil enters the linear cylinder left oil cavity through the linear cylinder left oil hole and the linear cylinder left oil pipe, and under the action of oil pressure, the piston sleeve drives the piston to move right, since the rotary connecting plate is fixedly connected with the linear cylinder assembly through the linear cylinder body assembly, the left end of the piston is fixedly connected with the linear cylinder body assembly, and the piston moving right drives the rotary connecting plate to move right; similarly, hydraulic oil enters the linear cylinder right oil cavity through the linear cylinder right oil hole, the right first oil pipe and the right second oil pipe, and under the action of oil pressure, the piston sleeve drives the piston to move left, and the piston moving left drives the rotary connecting plate to move left, this structure design integrates the horizontal moving linear oil cylinder into the swing oil cylinder, which can realize angle rotation in up-down direction and position movement in left-right direction, shortens the overall length of the device, has simple structure design, and improves the reliability and maintenance convenience of the device.

[0018] In addition, since the right end of the piston is provided with a plurality of damping holes, when the piston moves to the left end limit position, the hydraulic oil in the damping holes provides a reverse thrust to play a buffering protection role, the left end of the piston sleeve is provided with a damping chamfer, when the piston moves to the right end limit position, the damping chamfer forms a gap with the right second oil pipe, and the hydraulic oil flows back through the gap, when the hydraulic oil flows back from the right oil cavity into the gap, a reverse resistance is also formed to play a buffering protection role, and through the above buffering design, the stability and reliability of the linear oil cylinder can be improved.

[0019] And because the outer sealing ring, inner sealing ring, end cover sealing ring, piston outer sealing ring, piston inner sealing ring are lip sealing ring. This design through the lip of the lip sealing ring deformation under the action of hydraulic pressure, make lip close to the sealing surface, the higher the hydraulic pressure, the lip and sealing surface paste is more tight, sealing lip wear, with a certain ability of automatic compensation. Improve the sealing effect, and corrosion resistance, not easy to aging, wear resistance is good, wear in a certain extent can be automatically compensated, improve the long service life. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure of the present application schematic diagram;

[0021] Figure 2 is the right view of Figure 1 ;

[0022] Figure 3 is the top view of Figure 1 ;

[0023] Figure 4 is the section view of A-A in Figure 3 ;

[0024] Figure 5 is the structure schematic diagram of inner shaft assembly;

[0025] Figure 6 is the section view along the right second oil inlet pipe center line;

[0026] Figure 7 is the section view of the piston located in the right end of linear cylinder shaft section;

[0027] Figure 8 is the cross section view of the left end of the piston.

[0028] Explanation of symbols in the figure:

[0029] 1. Swing cylinder; 101. Swing cylinder barrel; 102. Cylinder barrel fixing part; 103. Inner shaft assembly; 10301. Round shaft section; 10302. Threaded shaft section; 103021. Inner shaft bevel gear; 10303. Straight cylinder shaft section; 10304. Connecting shaft section; 10305. Straight cylinder left oil hole; 10306. Straight cylinder left oil pipe; 10307. Straight cylinder right oil hole; 10308. Right first oil pipe; 10309. Right second oil pipe; 104. Inner gear ring; 105. Middle sleeve; 10501. Outer guide belt; 10502. Outer sealing ring; 10503. Inner guide belt; 10504. Inner sealing ring; 106. Right oil hole; 107. Left oil hole; 108. Right oil cavity; 109. Left oil cavity; 110. Left end cover; 111. Right end cover; 112. Thrust washer; 113. End cover guide belt; 114. End cover sealing ring; 115. End cover dustproof ring; 2. Rotary connecting plate; 3. Straight cylinder assembly; 301. Straight cylinder barrel assembly; 302. Piston; 30201. Damping hole; 303. Piston sleeve; 30301. Damping chamfer; 304. Straight cylinder end cover; 305. Straight cylinder right oil cavity; 306. Straight cylinder left oil cavity; 307. Piston outer guide belt; 308. Piston outer sealing ring; 309. Piston inner guide belt; 310. Piston inner sealing ring; 311. Piston dustproof ring; 4. Balance valve; 401. Balance valve connecting pipe; 5. Spline connecting shaft. DETAILED DESCRIPTION

[0030] The application will be further described in connection with the following examples.

[0031] Figures 1-8 is an embodiment of a composite swing cylinder of the application, which comprises a swing cylinder 1, a rotary connecting plate 2, a straight cylinder assembly 3, a balance valve 4 and a spline connecting shaft 5, the swing cylinder 1 is provided with a swing cylinder barrel 101, the outer surface of the swing cylinder barrel 101 is fixedly provided with a cylinder barrel fixing part 102, which plays a role of stabilizing and fixing, the inner cavity of the swing cylinder barrel 101 is fixedly provided with an inner gear ring 104 on the inner surface, the inner surface of the inner gear ring 104 is provided with bevel gear inner teeth, and the inner shaft assembly 103 is coaxially arranged in the inner part of the inner gear ring 104.

[0032] The inner shaft assembly 103 comprises a circular shaft segment 10301, a threaded shaft segment 10302, a linear cylinder shaft segment 10303 and a connecting shaft segment 10304, which are integrally machined, which can improve the pressure bearing capacity and reliability of the inner shaft, the circular shaft segment 10301 and the threaded shaft segment 10302 are located inside the swing cylinder 1, the outer surface of the threaded shaft segment 10302 is provided with an inner shaft bevel gear 103021, the linear cylinder shaft segment 10303 is located inside the linear cylinder assembly 3, the connecting shaft segment 10304 is located between the swing cylinder 1 and the linear cylinder assembly 3, and the connecting shaft segment 10304 is provided with a linear cylinder left oil hole 10305 and a linear cylinder right oil hole 10307, the right side of the linear cylinder left oil hole 10305 is communicated with a linear cylinder left oil pipe 10306, and the right end of the linear cylinder right oil hole 10307 is sequentially communicated with a right first oil pipe 10308 and a right second oil pipe 10309.

[0033] As can be seen in the figure, the inner shaft assembly 103 and the inner gear ring 104 are coaxially provided with an intermediate sleeve 105, the right end inner surface of the intermediate sleeve 105 is provided with an intermediate sleeve bevel internal gear, the right end outer surface of the intermediate sleeve 105 is provided with an intermediate sleeve bevel external gear, the intermediate sleeve bevel internal gear of the intermediate sleeve 105 is meshed with the inner shaft bevel external gear 103021, the intermediate sleeve bevel external gear of the intermediate sleeve 105 is meshed with the inner gear ring bevel internal gear of the inner gear ring 104, the left end outer surface of the intermediate sleeve 105 is provided with an outer guide belt 10501 and an outer sealing ring 10502, the left end outer surface of the intermediate sleeve 105 is slidably connected with the swing cylinder barrel 101 through the outer guide belt 10501, the left end inner surface of the intermediate sleeve 105 is provided with an inner guide belt 10503 and an inner sealing ring 10504, and the left end inner surface of the intermediate sleeve 105 is slidably connected with the circular shaft segment 10301 through the inner guide belt 10503.

[0034] The left and right ends of the swing cylinder body 101 are respectively provided with a left end cover 110 and a right end cover 111. The left end cover 110 and the swing cylinder body 101 are provided with an end cover guide belt 113, an end cover sealing ring 114, and an end cover dustproof ring 115. The left end cover 110 is rotationally connected to the swing cylinder body 101 through the end cover guide belt 113. The left end cover 110 is fixedly connected to the circular shaft section 10301. The left end cover 110, the inner shaft assembly 103, the swing cylinder body 101, and the intermediate sleeve 105 form a right oil cavity 108. The right end of the swing cylinder body 101 is provided with a right oil hole 106. The right oil hole 106 is in communication with the right oil cavity 108. The right end cover 111 and the swing cylinder body 101 are provided with an end cover sealing ring 114 and an end cover dustproof ring 115. The right end cover 111 and the inner shaft assembly 103 are provided with a thrust washer 112. The right end cover 111 is sealingly and rotationally connected to the inner shaft assembly 103. The right end cover 111, the inner shaft assembly 103, the swing cylinder body 101, and the intermediate sleeve 105 form a left oil cavity 109. The left end of the swing cylinder body 101 is provided with a left oil hole 107. The left oil hole 107 is in communication with the left oil cavity 109.

[0035] In this embodiment, the outer surface of the linear cylinder shaft section 10303 is provided with a connecting spline. The outer side of the linear cylinder shaft section 10303 is provided with a rotating connection plate 2. The rotating connection plate 2 is slidingly connected to the linear cylinder shaft section 10303 through the spline. The right side of the rotating connection plate 2 is fixedly provided with a linear cylinder assembly 3. The linear cylinder assembly 3 includes a linear cylinder body 301, a piston 302, a piston sleeve 303, and a linear cylinder end cover 304. The linear cylinder assembly 3 is fixedly connected to the rotating connection plate 2 through the linear cylinder body 301. The linear cylinder end cover 304 is fixedly connected to the right end of the linear cylinder shaft section 10303. The inside of the linear cylinder shaft section 10303 is coaxially provided with the piston 302. The right end of the piston 302 is provided with a plurality of damping holes 30201. The right end outer surface of the piston 302 is helically fixedly provided with the piston sleeve 303. The left end of the upper surface of the piston sleeve 303 is provided with a damping chamfer 30301. The outer surface of the piston sleeve 303 is provided with a piston outer guide belt 307 and a piston outer sealing ring 308. The piston sleeve 303 is slidingly connected to the linear cylinder shaft section 10303 through the piston outer guide belt 307. The left end of the piston 302 penetrates the linear cylinder end cover 304. The inner surface of the linear cylinder end cover 304 is provided with a piston inner guide belt 309, a piston inner sealing ring 310, and a piston dustproof ring 311. The piston 302 is slidingly connected to the linear cylinder end cover 304 through the piston inner guide belt 309. The left end of the piston 302 is fixedly connected to the linear cylinder body 301. The piston sleeve 303, the linear cylinder shaft section 10303, and the linear cylinder end cover 304 form a right oil cavity 305. The right oil cavity 305 is in communication with a right second oil pipe 10309. The left side of the piston sleeve 303, which is located inside the linear cylinder shaft section 10303, is provided with a linear cylinder left oil cavity 306. The left oil cavity 306 is in communication with a linear cylinder left oil pipe 10306.

[0036] The left end of the left end cover 110 is fixedly provided with a spline connecting shaft 5. Since the left end cover 110 is fixedly connected with the circular shaft section 10301, the spline connecting shaft 5 is integrated with the left end cover 110 and the circular shaft section 10301, and is rotatably connected with the swing cylinder body 101 through the end cover guide belt 113. This design has the characteristics of simple structure, strong impact resistance and high stability, reduces the number of parts, reduces the production and processing cost, is convenient to install and maintain, and improves the reliability and maintenance convenience of the device. The left end of the rotary connecting plate 2 is slidably connected with the spline connecting shaft 5, and the right end of the rotary connecting plate 2 is slidably connected with the linear cylinder shaft section 10303.

[0037] In this embodiment, the swing cylinder body 101 is fixedly provided with a balance valve 4 on the outer surface. One oil port of the balance valve 4 is communicated with the left oil hole 107 through a balance valve connecting pipe 401, and the other oil port of the balance valve 4 is communicated with the right oil hole 106. This design can make the input of hydraulic oil more stable and improve the stability of the equipment operation.

[0038] In this embodiment, the outer sealing ring 10502, the inner sealing ring 10504, the end cover sealing ring 114, the piston outer sealing ring 308 and the piston inner sealing ring 310 are lip-shaped sealing rings. This design deforms the lip of the lip-shaped sealing ring under the action of hydraulic pressure, so that the lip tightly abuts against the sealing surface. The higher the hydraulic pressure, the tighter the lip abuts against the sealing surface. After the sealing lip is worn, it has a certain automatic compensation ability. This improves the sealing effect, has strong corrosion resistance, is not easy to age, has good wear resistance, can automatically compensate to a certain extent after wear, and improves the long service life of the equipment.

[0039] As can be seen from the figure, the right end cover 111 and the inner shaft assembly 103 are provided with a thrust washer 112. This design can play a good fixing role and prevent the inner shaft assembly from shaking.

[0040] When the swing cylinder 1 works, hydraulic oil enters the left oil chamber 109 through the left oil hole 107, and the middle sleeve 105 moves right under the action of oil pressure. Since the inner gear ring 104 is fixed on the swing cylinder barrel 101, and the inner gear ring 104 inner tooth ring oblique inner tooth and the middle sleeve 105 middle sleeve oblique outer tooth are meshed with each other, the middle sleeve 105 will rotate when it moves due to the meshing effect of the oblique tooth. Since the inner shaft assembly 103 is fixedly connected with the left end cover 110 and the spline connecting shaft 5, the left end of the rotating connecting plate 2 is connected with the spline connecting shaft 5, the right end of the rotating connecting plate 2 is connected with the linear cylinder shaft segment 10303, and the inner shaft assembly 103 rotates when it rotates, the rotating connecting plate 2 rotates; similarly, hydraulic oil enters the right oil chamber 108 through the right oil hole 106, and the middle sleeve 105 moves left under the action of oil pressure. The middle sleeve 105 will rotate in the other direction when it moves due to the meshing effect of the oblique tooth, and the inner shaft assembly 103 will rotate in the other direction when it rotates, and the rotating connecting plate 2 will rotate in the other direction when it rotates. The up and down rotation angle of the rotating connecting plate 2 is ±90 degrees. This design has high anti-shock ability, so that the load is evenly distributed on all oblique teeth, has good durability and recovery for vibration load, and can continuously output large torque.

[0041] When the linear cylinder assembly 3 works, hydraulic oil enters the linear cylinder left oil chamber 306 through the linear cylinder left oil hole 10305 and the linear cylinder left oil pipe 10306, and the piston sleeve 303 drives the piston 302 to move right under the action of oil pressure. Since the rotating connecting plate 2 is fixedly connected with the linear cylinder assembly 3 through the linear cylinder barrel 301, the left end of the piston 302 is fixedly connected with the linear cylinder barrel 301, and the piston 302 moves right to drive the rotating connecting plate 2 to move right; similarly, hydraulic oil enters the linear cylinder right oil chamber 305 through the linear cylinder right oil hole 10307, the right first oil pipe 10308 and the right second oil pipe 10309, and the piston sleeve 303 drives the piston 302 to move left under the action of oil pressure. The piston 302 moves left to drive the rotating connecting plate 2 to move left, and the left and right movement distance of the rotating connecting plate 2 is 0-50mm. This structure design integrates the horizontal moving linear oil cylinder into the swing oil cylinder, which can realize the angle rotation in the up and down direction and the position movement in the left and right direction, shortens the overall length of the device, has simple structure design, reduces the number of parts, reduces the production cost, improves the reliability and maintenance convenience of the device.

[0042] Since the right end of the piston 302 is provided with a plurality of damping holes 30201, when the piston 302 moves to the left end limit position, the hydraulic oil in the damping holes 30201 provides a reverse thrust, playing a buffering protection role. The left end of the upper surface of the piston sleeve 303 is provided with a damping chamfer 30301. When the piston 302 moves to the right end limit position, the damping chamfer 30301 forms a gap with the right second oil pipe 10309, and the hydraulic oil flows back through the gap. When the hydraulic oil flows back from the right oil chamber 305 into the gap, a reverse resistance is also formed, playing a buffering protection role. Through the above buffering design, the stability and reliability of the linear oil cylinder can be improved.

[0043] In addition, the present application uses a multi-layer dustproof ring, which can be used in various working environments, prevents dust from entering the inside of the hydraulic cylinder, reduces the wear of parts, and increases the service life.

[0044] The above is only a specific embodiment of the present application, which cannot limit the scope of the present application. The replacement of equivalent components or equivalent changes and modifications made within the scope of the present application should still fall within the scope of the claims of the present application.

Claims

1. A compound swing cylinder characterized by: The utility model provides a swing cylinder, rotary connecting plate, linear cylinder assembly, balance valve and spline connecting shaft, the swing cylinder is equipped with swing cylinder barrel, the swing cylinder barrel outer surface is equipped with cylinder barrel fixed part, the swing cylinder barrel inner chamber is equipped with internal gear ring, the internal gear ring inner surface is equipped with internal gear ring inclined tooth, the internal gear ring inside is equipped with inner shaft assembly, The inner shaft assembly includes a circular shaft segment, a threaded shaft segment, a linear cylinder shaft segment, and a connecting shaft segment. The circular shaft segment and the threaded shaft segment are located inside the swing cylinder. The outer surface of the threaded shaft segment is provided with inner shaft inclined external teeth. The linear cylinder shaft segment is located inside the linear cylinder assembly. The connecting shaft segment is located between the swing cylinder and the linear cylinder assembly. The connecting shaft segment is provided with a linear cylinder left oil hole and a linear cylinder right oil hole. The right side of the linear cylinder left oil hole is connected to the linear cylinder left oil pipe. The right end of the linear cylinder right oil hole is sequentially connected to the right first oil pipe and the right second oil pipe. The inner shaft assembly and the internal gear ring are coaxially provided with an intermediate sleeve. The right end inner surface of the intermediate sleeve is provided with intermediate sleeve inclined internal teeth. The right end outer surface of the intermediate sleeve is provided with intermediate sleeve inclined external teeth. The intermediate sleeve inclined internal teeth of the intermediate sleeve are meshed with the inner shaft inclined external teeth. The intermediate sleeve inclined external teeth of the intermediate sleeve are meshed with the internal gear ring inclined internal teeth of the internal gear ring. The left end outer surface of the intermediate sleeve is provided with an outer guide belt and an outer sealing ring. The left end outer surface of the intermediate sleeve is slidingly connected to the swing cylinder barrel through the outer guide belt. The left end inner surface of the intermediate sleeve is provided with an inner guide belt and an inner sealing ring. The left end inner surface of the intermediate sleeve is slidingly connected to the circular shaft segment through the inner guide belt. The left and right ends of the swing cylinder barrel are respectively provided with a left end cover and a right end cover. The left end cover and the swing cylinder barrel are provided with an end cover guide belt and an end cover sealing ring. The left end cover is rotationally connected to the swing cylinder barrel through the end cover guide belt. The left end cover is fixedly connected to the circular shaft segment. The left end cover, the inner shaft assembly, the swing cylinder barrel, and the intermediate sleeve form a right oil cavity. The right end of the swing cylinder barrel is provided with a right oil hole. The right oil hole is in communication with the right oil cavity. The right end cover and the swing cylinder barrel are provided with an end cover sealing ring. The right end cover and the inner shaft assembly are provided with a thrust washer. The right end cover and the inner shaft assembly are sealingly and rotationally connected. The right end cover, the inner shaft assembly, the swing cylinder barrel, and the intermediate sleeve form a left oil cavity. The left end of the swing cylinder barrel is provided with a left oil hole. The left oil hole is in communication with the left oil cavity. The outer surface of the straight cylinder shaft section is provided with a connecting spline, the outer side of the straight cylinder shaft section is provided with a rotary connecting plate, the rotary connecting plate is slidably connected with the straight cylinder shaft section through the spline, the right side of the rotary connecting plate is fixedly provided with a straight cylinder assembly, the straight cylinder assembly comprises a straight cylinder barrel, a piston, a piston sleeve and a straight cylinder end cover, the straight cylinder assembly is fixedly connected with the rotary connecting plate through the straight cylinder barrel, the straight cylinder end cover is fixedly connected with the right end of the straight cylinder shaft section, the inside of the straight cylinder shaft section is coaxially provided with the piston, the outer surface of the right end of the piston is spirally fixedly provided with the piston sleeve, the outer surface of the piston sleeve is provided with a piston outer guide belt and a piston outer sealing ring, the piston sleeve is slidably connected with the straight cylinder shaft section through the piston outer guide belt, the left end of the piston penetrates through the straight cylinder end cover, the inner surface of the straight cylinder end cover is provided with a piston inner guide belt and a piston inner sealing ring, the piston is slidably connected with the straight cylinder end cover through the piston inner guide belt, the left end of the piston is fixedly connected with the straight cylinder barrel, the piston sleeve, the straight cylinder shaft section and the straight cylinder end cover form a right oil cavity, the right oil cavity is communicated with a right second oil pipe, the left side of the piston sleeve located in the inside of the straight cylinder shaft section is provided with a straight cylinder left oil cavity, the left oil cavity is communicated with a straight cylinder left oil pipe; The left end of the left end cover is fixedly provided with a spline connecting shaft, the left end of the rotary connecting plate is slidably connected with the spline connecting shaft, and the right end of the rotary connecting plate is slidably connected with the straight cylinder shaft section. The right end of the piston is provided with a plurality of damping holes. The outer surface of the swing cylinder barrel is fixedly provided with a balance valve, one oil port of the balance valve is communicated with the left oil hole through a balance valve connecting pipe, and the other oil port of the balance valve is communicated with the right oil hole.

2. The compound swing cylinder of claim 1, wherein: The left end of the upper surface of the piston sleeve is provided with a damping chamfer.

3. A composite oscillating cylinder according to any one of claims 1 or 2, characterized in that: The left-right direction moving distance of the rotary connecting plate is 0-50mm.

4. The compound swing cylinder of claim 3, wherein: The up-down direction rotating angle of the rotary connecting plate is ±90 degrees.

5. The compound swing cylinder of claim 4, wherein: The circular shaft section, the threaded shaft section, the straight cylinder shaft section and the connecting shaft section are integrally machined.

6. The composite oscillating cylinder of claim 5, wherein: The outer sealing ring, the inner sealing ring, the end cover sealing ring, the piston outer sealing ring and the piston inner sealing ring are lip-shaped sealing rings.

Images