Air cylinder with adjustable stroke

Abstract

The utility model discloses a stroke-adjustable air cylinder, which relates to the technical field of air cylinders, and comprises an adjustable air cylinder consisting of a cylinder barrel, a piston rod, a screw rod, a limiting ring column and an adjusting nut, the limiting ring column is in threaded connection with the outer side of the screw rod through the adjusting nut, and a locking component is arranged on the screw rod. The locking assembly is used for locking and reinforcing rotation of the adjusting nut. The locking assembly is arranged, the transverse portion of the side inverted L-shaped locking rod protrudes out of the screw and is clamped into the inner side of one locking clamping groove in the adjusting nut and the inner side of one locking clamping groove in the reinforcing nut, rotating locking of the adjusting nut and the reinforcing nut is achieved, and compared with a traditional adjusting nut structure which is locked only through a thread structure, the locking assembly is simple in structure and convenient to use. The limiting ring column and the adjusting nut can be effectively prevented from integrally deflecting and loosening, so that the stability of the adjustable air cylinder is further improved.

Description

Technical Field

[0001] This utility model relates to the field of cylinder technology, specifically a cylinder with adjustable stroke. Background Technology

[0002] A cylinder is a pneumatic actuator that converts the pressure energy of compressed air into mechanical energy to achieve linear reciprocating motion or oscillation. The cylinder mainly consists of a cylinder barrel, piston, piston rod, end cap, etc. When compressed air is input from the cylinder inlet, the compressed air forms pressure in the cylinder barrel, pushing the piston to move. The pressure difference on both sides of the piston is the direct power source for the piston's movement. If compressed air is introduced into one side of the piston and the other side is open to the atmosphere or in a low-pressure state, then under the action of the pressure difference, the piston will move towards the low-pressure side.

[0003] With the technological development and production needs of cylinders, there is now a type of cylinder with adjustable stroke on the market. Its piston rod runs through both ends of the cylinder barrel, and an adjustable limiting ring is threaded to the tail end of the piston rod. By adjusting the movement of the limiting ring relative to the piston rod, the stroke of the piston rod can be adjusted. The operation is simple and convenient.

[0004] However, in actual use, the limiting ring and piston rod are only fixed by the threaded structure. During the reciprocating movement of the piston rod, the collision and vibration between the limiting ring and the cylinder can easily cause the limiting ring to deflect and loosen, resulting in a change in the stroke of the piston rod. To avoid this situation, a cylinder with adjustable stroke is provided. Utility Model Content

[0005] The purpose of this invention is to provide a cylinder with adjustable stroke in order to solve the problems mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable cylinder, comprising an adjustable cylinder consisting of a cylinder barrel, a piston rod, a screw, a limiting ring post, and an adjusting nut. The piston rod is slidably connected to the inner side of the cylinder barrel and extends to both ends of the outer side of the cylinder barrel. The screw is fixed to the rear end of the piston rod. The adjusting nut is fixed to one end of the limiting ring post. The limiting ring post is threadedly connected to the outer side of the screw through the adjusting nut, and the limiting ring post extends and sleeves on the outer side of the piston rod. A locking assembly is provided on the screw, which is used to lock and reinforce the rotation of the adjusting nut.

[0007] The locking assembly includes a side-tilted L-shaped locking rod and a locking slot;

[0008] The upper surface of the outer wall of the piston rod is provided with a side-inverted L-shaped groove. The side-inverted L-shaped locking rod is installed inside the side-inverted L-shaped groove and protrudes to the outside of the piston rod. The locking groove is provided inside the adjusting nut. The adjusting nut is engaged with the outside of the side-inverted L-shaped groove through the locking groove to realize the rotation locking of the adjusting nut.

[0009] As a further improvement of this utility model, the locking assembly also includes a convex clamping bolt;

[0010] The screw has a groove at its rear end, and the inner wall end face of the groove has a threaded hole, and the side-inverted L-shaped groove is connected to the groove.

[0011] The vertical part of the side-inverted L-shaped locking rod extends into the inside of the groove;

[0012] The convex clamping bolt is threadedly connected and fixed to the threaded hole, and the nut of the convex clamping bolt squeezes the side-inverted L-shaped locking rod to lock the side-inverted L-shaped locking rod protruding outside the screw rod.

[0013] As a further embodiment of this utility model: a horizontal hook is formed at the bottom of the vertical part of the side-inverted L-shaped locking rod, and a slot is formed at the top of the inner wall of the groove for the horizontal hook to be engaged.

[0014] The outer wall of the nut portion of the convex clamping bolt has a conical structure.

[0015] As a further embodiment of this utility model: the depth and width of the lateral groove of the side-inverted L-shaped groove are respectively matched with the height and width of the lateral part of the side-inverted L-shaped locking rod. The inner side of the adjusting nut is provided with multiple locking slots, which are evenly distributed along the ring, and the inner wall width of the locking slot is matched with the width of the side-inverted L-shaped locking rod.

[0016] As a further improvement of this utility model: a buffer rubber ring is bonded and fixed to one end of the limiting ring near the cylinder, and a reinforcing nut is threaded to the outer side of the screw, and multiple annularly distributed locking grooves are provided on the inner side of the reinforcing nut.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] By setting a locking component, the horizontal part of the side-tilted L-shaped locking rod protrudes from the screw and engages with the inner side of a locking groove on the adjusting nut and the reinforcing nut, thus achieving rotational locking of the adjusting nut and the reinforcing nut. Compared with the traditional adjusting nut structure that is only locked by a threaded structure, it can effectively prevent the limiting ring column and the adjusting nut from deflecting and loosening, thereby further improving the stability of the adjustable cylinder. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram showing the disassembled parts of this utility model;

[0021] Figure 3This is a schematic diagram of the structure of the reinforcing nut of this utility model;

[0022] Figure 4 This is a cross-sectional view of the internal structure of the screw of this utility model;

[0023] Figure 5 This is a cross-sectional view of the screw of this utility model.

[0024] In the diagram: 1. Adjustable cylinder; 101. Cylinder barrel; 102. Piston rod; 103. Screw; 104. Limiting ring; 105. Adjusting nut; 106. Buffer rubber ring; 107. Side-tilted L-shaped groove; 108. Groove; 109. Threaded hole; 2. Locking assembly; 201. Side-tilted L-shaped locking rod; 202. Convex clamping bolt; 203. Locking slot; 3. Reinforcing nut. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 In this embodiment of the present invention, an adjustable cylinder includes an adjustable cylinder 1 consisting of a cylinder barrel 101, a piston rod 102, a screw 103, a limiting ring post 104, and an adjusting nut 105. The piston rod 102 is slidably connected to the inner side of the cylinder barrel 101 and extends through to both ends of the outer side of the cylinder barrel 101. The screw 103 is fixed to the rear end of the piston rod 102. The adjusting nut 105 is fixed to one end of the limiting ring post 104. The limiting ring post 104 is threadedly connected to the outer side of the screw 103 through the adjusting nut 105, and the limiting ring post 104 extends and sleeves on the outer side of the piston rod 102. A locking assembly 2 is provided on the screw 103, which is used to lock and reinforce the rotation of the adjusting nut 105.

[0027] Locking assembly 2 includes a side-tilting L-shaped locking rod 201 and a locking slot 203;

[0028] The upper surface of the outer wall of the piston rod 102 is provided with a side-inverted L-shaped groove 107. The side-inverted L-shaped locking rod 201 is installed inside the side-inverted L-shaped groove 107 and protrudes to the outside of the piston rod 102. The locking groove 203 is provided inside the adjusting nut 105. The adjusting nut 105 is engaged with the outside of the side-inverted L-shaped groove 107 through the locking groove 203 to realize the rotation locking of the adjusting nut 105.

[0029] Locking assembly 2 also includes a convex clamping bolt 202;

[0030] The rear end of the screw 103 is provided with a groove 108, the inner wall end face of the groove 108 is provided with a threaded hole 109, and the side-inverted L-shaped groove 107 is connected to the groove 108.

[0031] The vertical part of the side-tilting L-shaped locking rod 201 extends into the inside of the groove 108;

[0032] The convex clamping bolt 202 is threadedly connected and fixed to the threaded hole 109, and the nut of the convex clamping bolt 202 presses against the side-inverted L-shaped locking rod 201 to lock the side-inverted L-shaped locking rod 201 protruding outside the screw rod 103.

[0033] The depth and width of the lateral groove 107 of the side-inverted L-shaped groove are matched with the height and width of the lateral part of the side-inverted L-shaped locking rod 201, respectively. Multiple locking grooves 203 are provided on the inner side of the adjusting nut 105. The multiple locking grooves 203 are evenly distributed along the ring, and the width of the inner wall of the locking groove 203 is matched with the width of the side-inverted L-shaped locking rod 201.

[0034] A buffer rubber ring 106 is bonded and fixed to one end of the limiting ring post 104 near the cylinder barrel 101. A reinforcing nut 3 is also threaded to the outside of the screw 103. Multiple annularly distributed locking grooves 203 are opened on the inner side of the reinforcing nut 3.

[0035] In this embodiment: When the adjustable cylinder 1 is running, as the piston rod 102 moves forward, it will drive the limiting ring 104 and the buffer rubber ring 106 closer to the cylinder barrel 101. When the limiting ring 104 contacts the cylinder barrel 101 through the buffer rubber ring 106, the piston rod 102 reaches its maximum stroke. Therefore, the stroke of the piston rod 102 can be adjusted simply by adjusting the position of the limiting ring 104. The adjustment steps for the limiting ring 104 are as follows:

[0036] First, loosen the convex clamping bolt 202 with a tool to release the compression of the side-inverted L-shaped locking rod 201. At this time, the side-inverted L-shaped locking rod 201 moves downward relative to the screw 103, so that the lateral part of the side-inverted L-shaped locking rod 201 is completely retracted into the side-inverted L-shaped groove 107. At this time, the side-inverted L-shaped locking rod 201 does not contact the adjusting nut 105 or the reinforcing nut 3. Thus, the adjusting nut 105 can be rotated and adjusted with a tool to achieve the position adjustment of the limiting ring column 104.

[0037] After determining the position of the limiting ring post 104, tighten the reinforcing nut 3 to make it fit tightly against the adjusting nut 105. Then, tighten the convex clamping bolt 202. The conical surface of the convex clamping bolt 202 compresses the side-inverted L-shaped locking rod 201, causing the side-inverted L-shaped locking rod 201 to move upward. The lateral part of the side-inverted L-shaped locking rod 201 protrudes from the screw 103 and is inserted into a locking groove 203 on the adjusting nut 105 and the reinforcing nut 3, thereby achieving rotational locking of the adjusting nut 105 and the reinforcing nut 3. Compared with the traditional adjusting nut structure that is locked only by the thread structure, it can effectively prevent the limiting ring post 104 and the adjusting nut 105 from deflecting and loosening as a whole, and further improve the stability of the adjustable cylinder 1.

[0038] Please refer to this carefully. Figures 4-5 The bottom of the vertical part of the side-tilting L-shaped locking rod 201 is formed with a horizontal hook, and the top of the inner wall of the groove 108 is formed with a slot for the horizontal hook to be engaged.

[0039] The outer wall of the nut portion of the convex clamping bolt 202 has a tapered structure.

[0040] In this embodiment: the horizontal hook on the side-tilting L-shaped locking rod 201 engages with the slot to limit the upward movement of the side-tilting L-shaped locking rod 201 and prevent the side-tilting L-shaped locking rod 201 from disengaging from the screw 103.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stroke-adjustable cylinder, comprising an adjustable cylinder (1) consisting of a cylinder barrel (101), a piston rod (102), a screw rod (103), a limiting ring post (104), and an adjusting nut (105), wherein the piston rod (102) is slidably connected to the inner side of the cylinder barrel (101) and extends to both ends of the outer side of the cylinder barrel (101), the screw rod (103) is fixed to the rear end of the piston rod (102), the adjusting nut (105) is fixed to one end of the limiting ring post (104), the limiting ring post (104) is threadedly connected to the outer side of the screw rod (103) through the adjusting nut (105), and the limiting ring post (104) extends and sleeves on the outer side of the piston rod (102), characterized in that, A locking assembly (2) is provided on the screw (103), which is used to lock and reinforce the rotation of the adjusting nut (105); The locking assembly (2) includes a side-tilted L-shaped locking rod (201) and a locking slot (203); The piston rod (102) has a side-inverted L-shaped groove (107) on its outer wall surface. The side-inverted L-shaped locking rod (201) is installed inside the side-inverted L-shaped groove (107) and protrudes to the outside of the piston rod (102). The locking groove (203) is opened inside the adjusting nut (105). The adjusting nut (105) is engaged with the outside of the side-inverted L-shaped groove (107) through the locking groove (203) to realize the rotation locking of the adjusting nut (105).

2. The cylinder with adjustable stroke according to claim 1, characterized in that, The locking assembly (2) also includes a convex clamping bolt (202); The screw (103) has a groove (108) at its rear end, and a threaded hole (109) is provided on the inner wall end face of the groove (108). The side-inverted L-shaped groove (107) is connected to the groove (108). The vertical portion of the side-inverted L-shaped locking rod (201) extends into the inside of the groove (108); The convex clamping bolt (202) is threadedly connected and fixed to the threaded hole (109), and the nut of the convex clamping bolt (202) presses against the side-inverted L-shaped locking rod (201) to lock the side-inverted L-shaped locking rod (201) protruding outside the screw rod (103).

3. A stroke-adjustable cylinder according to claim 2, characterized in that, The bottom of the vertical part of the side-inverted L-shaped locking rod (201) is formed with a horizontal hook, and the top of the inner wall of the groove (108) is formed with a slot for the horizontal hook to be inserted. The outer wall of the nut portion of the convex clamping bolt (202) has a tapered structure.

4. A stroke-adjustable cylinder according to claim 1, characterized in that, The depth and width of the lateral groove (107) are matched with the height and width of the lateral part of the lateral L-shaped locking rod (201), respectively. The adjusting nut (105) has multiple locking grooves (203) on its inner side. The multiple locking grooves (203) are evenly distributed along the ring, and the width of the inner wall of the locking groove (203) is matched with the width of the lateral L-shaped locking rod (201).

5. A stroke-adjustable cylinder according to claim 1, characterized in that, The limiting ring (104) is bonded and fixed with a buffer rubber ring (106) at one end near the cylinder (101). The outer side of the screw (103) is also threaded with a reinforcing nut (3). The inner side of the reinforcing nut (3) is provided with multiple annularly distributed locking grooves (203).

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