Adjustable swing oil cylinder

Abstract

The utility model discloses an adjustable swing oil cylinder, and particularly relates to the technical field of swing oil cylinders, the adjustable swing oil cylinder comprises a cylinder body, an end cover arranged in the middle of the outer top surface of the cylinder body and a rack arranged in the cylinder body, threaded rods are rotatably connected to the left side and the right side of the outer surface of the cylinder body, and movable holes are formed in the middles of the left side and the right side of the outer surface of the cylinder body; the interiors of the two movable holes are both slidably connected with limiting rods, and parts of the two limiting rods are both located in the cylinder body. According to the adjustable swing oil cylinder, in actual work, the threaded rod is rotated, the connecting plate and the limiting rods can be driven to move along the sliding rod, then one ends of the limiting rods move in the cylinder body, when the rack moves left and right, the two pistons can make contact with the ends, located in the cylinder body, of the two limiting rods, and the two pistons can make contact with the two limiting rods. The moving distance of the rack is limited, so that the moving distance of the rack is adjusted, and the purpose of adjusting the swing angle of the rotating shaft is achieved.

Description

Technical Field

[0001] This utility model relates to the field of swing cylinder technology, and in particular to an adjustable swing cylinder. Background Technology

[0002] Swing cylinders are divided into three structural forms: rack and pinion, vane, and spiral. The rack and pinion swing cylinder uses hydraulic pressure to drive the pistons on both sides to move, which in turn drives the rack to move left and right. The rack drives the gear to rotate, which in turn drives the rotating shaft to rotate. The rack and pinion swing cylinder is simple to manufacture.

[0003] A search revealed, for example, a utility model with publication number CN211852337U, which discloses a gear and rack swing cylinder, including a cylinder body with a first oil inlet and a second oil inlet at both ends of the outer wall of the cylinder body. A rack is provided inside the cylinder body, and pistons are provided at both ends of the rack. Since the swing angle of the gear shaft is proportional to the length of the rack, but the internal structure of this utility model is fixed, the rack length and the moving distance are also fixed, and the maximum swing angle of the gear is also fixed. When different swing angles are required for different applications, different swing cylinders can only be used, resulting in a waste of resources. Therefore, in order to solve the above defects, the inventor proposes an adjustable swing cylinder. Utility Model Content

[0004] The main purpose of this invention is to provide an adjustable swing cylinder, which can effectively solve the problem of the fixed movement distance of the rack and pinion in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An adjustable swing cylinder includes a cylinder body, an end cap located at the center of the top surface of the cylinder body, and a rack located inside the cylinder body. Threaded rods are rotatably connected to both the left and right sides of the outer surface of the cylinder body. Movable holes are opened at the center of both the left and right sides of the outer surface of the cylinder body. Limit rods are slidably connected inside the two movable holes. Parts of the two limit rods are located inside the cylinder body, and the other parts of the two limit rods are located outside the cylinder body.

[0007] Each of the two limiting rods has a connecting plate fixedly installed at one end outside the cylinder body, and the two connecting plates are threadedly connected to the two threaded rods respectively. Sliding rods are fixedly installed on the left and right sides of the outer surface of the cylinder body, and the two connecting plates are slidably connected to the two sliding rods respectively.

[0008] Preferably, a handle is fixedly installed at the end of each of the two threaded rods away from the cylinder body, and a baffle is fixedly installed on the side of each of the two limiting rods extending to the outer surface of the cylinder body.

[0009] Preferably, two support plates are fixedly installed on both the left and right sides of the outer surface of the cylinder. One side of the two support plates has a through hole, and the other side of the two support plates has a fixing hole. The outer surface of the limiting rod has multiple adjustment holes on the side outside the cylinder.

[0010] Preferably, oil ports are provided on both the left and right sides of the outer surface of the cylinder, and oil passages are provided between the two oil ports and the cylinder.

[0011] Preferably, a dustproof ring is fixedly installed on one side of the inside of the movable hole, a first guide belt is fixedly installed on the side of the inside of the movable hole near the dustproof ring, a U-shaped ring is fixedly installed on the side of the inside of the movable hole near the first guide belt, a step seal is fixedly installed on the side of the inside of the movable hole near the U-shaped ring, and a second guide belt is fixedly installed on the side of the inside of the movable hole near the step seal.

[0012] Preferably, the end cap has a gear inside, and the gear meshes with a rack. The end of the gear is coaxially connected to a rotating shaft, and pistons are fixedly installed at both ends of the rack.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model discloses an adjustable swing cylinder. By setting two limiting rods, in actual operation, rotating the threaded rod can drive the connecting plate and the limiting rods to move along the slide rod, thereby causing one end of the limiting rod to move inside the cylinder body. When the rack moves left and right, the two pistons will contact the ends of the two limiting rods located inside the cylinder body, that is, limit the movement distance of the rack, thereby adjusting the movement distance of the rack and achieving the purpose of adjusting the swing angle of the rotating shaft. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a side view of the cylinder block structure of this utility model;

[0017] Figure 3 For the present utility model Figure 2 Enlarged view of section A in the middle;

[0018] Figure 4 This is a schematic diagram of the end cap structure of this utility model;

[0019] Figure 5 For the present utility model Figure 4 Enlarged view of section B in the middle;

[0020] Figure 6 This is a schematic cross-sectional view of the movable hole structure of this utility model;

[0021] Figure 7 For the present utility model Figure 6 Enlarged view of section C;

[0022] Figure 8 This is a cross-sectional view of the cylinder block of this utility model.

[0023] In the diagram: 1. Cylinder block; 2. End cover; 3. Rotating shaft; 4. Gear; 5. Piston; 6. Rack; 101. Limiting rod; 102. Threaded rod; 103. Connecting plate; 104. Sliding rod; 105. Baffle; 106. Rotating handle; 107. Movable hole; 1021. Support plate; 1022. Through hole; 1023. Adjusting hole; 1024. Fixing hole; 1031. Oil port; 1032. Oil passage; 1071. Dustproof ring; 1072. First guide belt; 1073. U-ring; 1074. Step seal; 1075. Second guide belt. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] This utility model discloses an adjustable swing cylinder, such as Figure 1-8 As shown, it includes a cylinder body 1, an end cap 2 located in the middle of the outer top surface of the cylinder body 1, and a rack 6 located inside the cylinder body 1. Oil ports 1031 are provided on both the left and right sides of the outer surface of the cylinder body 1, and oil passages 1032 are provided between the two oil ports 1031 and the cylinder body 1.

[0026] The end cover 2 is equipped with a gear 4 inside, which meshes with a rack 6. The end of the gear 4 is coaxially connected to a rotating shaft 3. Pistons 5 are fixedly installed at both ends of the rack 6. When hydraulic oil enters the left side of the cylinder 1 through the oil port 1031 on the left side, it pushes the piston 5 to move to the right. Conversely, when the oil enters the right side of the cylinder 1 through the oil port 1031 on the right side, the piston 5 moves to the left.

[0027] The rack 6 between the two pistons 5 meshes with the gear 4. The linear motion of the rack 6 driven by the piston 5 forces the gear 4 to rotate around the axis, and the rotating shaft 3 rotates accordingly.

[0028] Threaded rods 102 are rotatably connected to both the left and right sides of the outer surface of the cylinder body 1. Movable holes 107 are opened in the middle of both the left and right sides of the outer surface of the cylinder body 1. Limiting rods 101 are slidably connected inside the two movable holes 107. Parts of the two limiting rods 101 are located inside the cylinder body 1, and the other parts are located outside the cylinder body 1. The limiting rods 101 can be inserted into the cylinder body 1. When the piston 5 and the rack 6 move, the piston 5 will contact the limiting rods 101. By adjusting the distance of the limiting rods 101 inserted into the cylinder body 1, the moving distance of the rack 6 can be adjusted, thereby adjusting the swing angle of the rotating shaft 3.

[0029] Two limiting rods 101 are fixedly mounted with connecting plates 103 at one end outside the cylinder body 1, and the two connecting plates 103 are respectively threadedly connected to two threaded rods 102. Sliding rods 104 are fixedly mounted on both sides of the outer surface of the cylinder body 1, and the two connecting plates 103 are respectively slidably connected to the two sliding rods 104. When the threaded rods 102 rotate, they will drive the connecting plates 103 to move along the sliding rods 104. When the connecting plates 103 move, they will drive the limiting rods 101 to move.

[0030] Two threaded rods 102 are each fixedly mounted with a handle 106 at the end away from the cylinder body 1. The user can rotate the threaded rods 102 by holding and rotating the handle 106. Two limit rods 101 are each fixedly mounted with a baffle 105 on one side of the outer surface of the cylinder body 1. The baffle 105 can prevent the side of the limit rod 101 with the adjustment hole 1023 from entering the cylinder body 1.

[0031] Two support plates 1021 are fixedly installed on both the left and right sides of the outer surface of the cylinder body 1. The two support plates 1021 are located on both sides of the limiting rod 101. A through hole 1022 is opened on one side of the two support plates 1021, and a fixing hole 1024 is opened on the other side of the two support plates 1021. Multiple adjustment holes 1023 are opened on the side of the outer surface of the limiting rod 101 that is outside the cylinder body 1. When the limiting rod 101 moves, the multiple adjustment holes 1023 will overlap with the through hole 1022 and the fixing hole 1024 in sequence. By inserting bolts into the overlapping adjustment holes 1023, through holes 1022 and fixing holes 1024, the limiting rod 101 can be fixed.

[0032] A dustproof ring 1071 is fixedly installed on one side of the inner side of the movable hole 107. The dustproof ring 1071 is usually annular and directly contacts the surface of the limit rod 101. It achieves sealing through elastic deformation. The contact surface is designed as a lip or a flat surface and is attached to the limit rod 101 by pre-compression force.

[0033] A first guide belt 1072 is fixedly installed inside the movable hole 107 on the side near the dustproof ring 1071, and a U-shaped ring 1073 is fixedly installed inside the movable hole 107 on the side near the first guide belt 1072. The cross-sectional shape of the U-shaped ring 1073 is U-shaped, and it contacts the limiting rod 101 to achieve dynamic sealing through elastic deformation.

[0034] A step seal 1074 is fixedly installed inside the movable hole 107 on the side near the U-shaped ring 1073. The step seal 1074 consists of an outer ring and an inner ring. The outer ring has an elliptical cross section, the outer side of the inner ring has a sloping arc transition, and the inner side of the inner ring is composed of a sloping surface and a C-shaped groove. The step seal 1074 is interference-fitted with the limit rod 101.

[0035] Furthermore, a second guide belt 1075 is fixedly installed inside the movable hole 107 on the side near the step seal 1074. Both the first guide belt 1072 and the second guide belt 1075 are in direct contact with the surface of the limit rod 101. The guide belt is responsible for guiding and reducing friction, while the dust ring 1071 is responsible for sealing and dust prevention.

[0036] The working principle of this utility model is as follows: when hydraulic oil enters the left side of the cylinder 1 through the left oil port 1031, it pushes the piston 5 to move to the right. Conversely, when the oil enters the right side of the cylinder 1 through the right oil port 1031, the piston 5 moves to the left. The rack 6 between the two pistons 5 meshes with the gear 4. The linear motion of the piston 5 and the rack 6 forces the gear 4 to rotate around the axis, and the rotating shaft 3 rotates accordingly.

[0037] The user holds and rotates the two handles 106 to drive the two threaded rods 102 to rotate, so that the two connecting plates 103 drive the two limiting rods 101 to move, so that one end of the two limiting rods 101 moves inside the cylinder 1, thereby adjusting the distance between the two limiting rods 101 and the two pistons 5, and thus adjusting the moving distance of the rack 6.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable swing cylinder, comprising a cylinder body (1), an end cap (2) disposed at the center of the outer top surface of the cylinder body (1), and a rack (6) disposed inside the cylinder body (1), characterized in that: The cylinder body (1) has threaded rods (102) rotatably connected to both the left and right sides of its outer surface. Movable holes (107) are opened in the middle of both the left and right sides of the outer surface of the cylinder body (1). Limiting rods (101) are slidably connected inside the two movable holes (107). Parts of the two limiting rods (101) are located inside the cylinder body (1), and the other parts of the two limiting rods (101) are located outside the cylinder body (1). Each of the two limiting rods (101) is fixedly mounted with a connecting plate (103) at one end outside the cylinder body (1), and the two connecting plates (103) are threadedly connected to the two threaded rods (102) respectively. Sliding rods (104) are fixedly mounted on the left and right sides of the outer surface of the cylinder body (1), and the two connecting plates (103) are slidably connected to the two sliding rods (104) respectively.

2. The adjustable swing cylinder according to claim 1, characterized in that: A handle (106) is fixedly installed at the end of each of the two threaded rods (102) away from the cylinder body (1), and a baffle (105) is fixedly installed on the side of each of the two limiting rods (101) extending to the outer surface of the cylinder body (1).

3. An adjustable swing cylinder according to claim 1, characterized in that: Two support plates (1021) are fixedly installed on the left and right sides of the outer surface of the cylinder (1). One side of the two support plates (1021) is provided with a through hole (1022), and the other side of the two support plates (1021) is provided with a fixing hole (1024). The outer surface of the limiting rod (101) is provided with multiple adjustment holes (1023) on the side outside the cylinder (1).

4. An adjustable swing cylinder according to claim 3, characterized in that: Oil ports (1031) are provided on both the left and right sides of the outer surface of the cylinder (1), and oil passages (1032) are provided between the two oil ports (1031) and the cylinder (1).

5. An adjustable swing cylinder according to claim 1, characterized in that: A dustproof ring (1071) is fixedly installed on one side of the inside of the movable hole (107). A first guide belt (1072) is fixedly installed on the side of the movable hole (107) near the dustproof ring (1071). A U-shaped ring (1073) is fixedly installed on the side of the movable hole (107) near the first guide belt (1072). A step seal (1074) is fixedly installed on the side of the movable hole (107) near the U-shaped ring (1073). A second guide belt (1075) is fixedly installed on the side of the movable hole (107) near the step seal (1074).

6. An adjustable swing cylinder according to claim 1, characterized in that: The end cap (2) is provided with a gear (4) inside, and the gear (4) meshes with the rack (6). The end of the gear (4) is coaxially connected to a rotating shaft (3), and pistons (5) are fixedly installed at both ends of the rack (6).

Images