Hydraulic oil cylinder convenient for stroke adjustment

Abstract

The hydraulic oil cylinder convenient to adjust the stroke comprises an oil cylinder body and a hollow adjusting plate, the inner cavity wall of the oil cylinder body is connected with a hollow piston rod in a sliding mode, the left end of the hollow piston rod extends to the outer side of the oil cylinder body, and the right end of the hollow piston rod extends to the outer side of the oil cylinder body. The hydraulic oil cylinder convenient to adjust the stroke is reasonable in structural design, when the length of the hydraulic oil cylinder is larger than the maximum stroke length of the hollow piston rod, the length of the hydraulic oil cylinder can be adjusted, and the length of the hydraulic oil cylinder can be adjusted. The length of the adjusting rod is adjusted according to actual conditions to adapt to different operation conditions, so that the overall applicability is improved, the stroke of the hollow piston rod can be conveniently limited under the condition that the sealing performance of the oil cylinder body is not affected, and the stopping position of the hollow piston rod is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a hydraulic cylinder that is easy to adjust the stroke. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. When used to achieve reciprocating motion, it has no transmission backlash and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines, and the use of cylinders is quite extensive in equipment manufacturing.

[0003] A patent document with authorization announcement number CN218624866U discloses a hydraulic cylinder with easy stroke adjustment, including a cylinder barrel. A controller is fixedly connected to one side of the outer wall of the cylinder barrel, and a sensing hole is provided on one side of the controller. A sliding opening is formed on one side of the outer wall of the cylinder barrel, and a limit block is movably connected within the sliding opening. A sensing head is provided on one side of the limit block, and the sensing head can be inserted into the sensing hole. A spring is fixedly connected to one side of the limit block and is fixed to the cylinder barrel. A piston rod is movably connected to one side of the cylinder barrel, and a mounting bracket is fixedly connected to the circumferential outer wall of the piston rod. This utility model not only controls the stroke distance of the piston rod through the cooperation of the limit block and the contact block, improving the use effect of the hydraulic cylinder, but also controls the extension and retraction length of the piston rod through the screw, improving the flexibility of the hydraulic cylinder. Furthermore, it can change the control method of the piston rod through the magnetic block, improving the practicality of the device.

[0004] When using the above-mentioned device, if the stroke distance exceeds the maximum extension length of the hydraulic cylinder, it cannot be used and a hydraulic cylinder with a matching stroke distance needs to be replaced. It is not convenient to adjust the stroke of the hydraulic cylinder according to the actual use, resulting in low overall applicability. In addition, the above-mentioned device has a sliding port on the cylinder to limit the stroke of the piston rod in conjunction with other structures, but the sliding port will affect the sealing performance of the hydraulic cylinder, leading to a decrease in the sealing performance. Therefore, we propose a hydraulic cylinder that is easy to adjust the stroke. Utility Model Content

[0005] The purpose of this utility model is to provide a hydraulic cylinder with easy stroke adjustment, in order to solve the problem mentioned in the background art that when the above-mentioned device is used, if the stroke distance is greater than the maximum extension length of the hydraulic cylinder, it cannot be used and a hydraulic cylinder with a matching stroke distance is required. It is not convenient to adjust the stroke of the hydraulic cylinder according to the actual use, resulting in low overall applicability. In addition, the above-mentioned device has a sliding port on the cylinder to limit the stroke of the piston rod in conjunction with other structures, but the sliding port will affect the sealing performance of the hydraulic cylinder, resulting in a decrease in the sealing performance of the hydraulic cylinder.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder with easy stroke adjustment, comprising a cylinder body and a hollow adjusting plate, wherein a hollow piston rod is slidably connected to the inner wall of the cylinder body, the left end of the hollow piston rod extends to the outer side of the cylinder body, and the left end of the hollow piston rod is fixedly connected to the middle of the right side wall of the hollow adjusting plate; an adjusting rod is slidably connected to the inner wall of the hollow piston rod, the left end of the adjusting rod penetrates the hollow adjusting plate and extends to the outer side of the hollow adjusting plate, and the outer side wall of the adjusting rod is slidably connected to the inner side wall of the hollow adjusting plate;

[0007] A long groove plate is fixedly connected to the top of the cylinder body. A mounting plate is fixedly connected to the top of the hollow piston rod and between the left end of the cylinder body and the right side wall of the hollow adjusting plate. A connecting rod is fixedly connected to the upper side of the right side wall of the mounting plate. The right end of the connecting rod extends into the inner cavity of the long groove plate and is fixedly connected to a positioning plate. The outer side wall of the positioning plate is slidably connected to the inner cavity wall of the long groove plate.

[0008] As a further description of the above technical solution:

[0009] The hollow adjusting plate has mounting grooves on its left side wall, located on both sides of the adjusting rod. A T-shaped block is slidably connected to the inner wall of the mounting groove. The left side wall of the T-shaped block extends to the outside of the mounting groove. A double-ended screw is rotatably connected to the upper rear side of the inner wall of the rear mounting groove via a bearing. The front end of the double-ended screw extends to the outside of the hollow adjusting plate and is fixedly connected to a knob. The T-shaped blocks on both sides are screwed to the outer sides of the double-ended screw respectively. A fixing arc plate is fixedly connected to the inner side wall of the T-shaped blocks on both sides, located on the outside of the mounting groove. A fixing rod is fixedly connected to the inner side wall of the fixing arc plate on both sides.

[0010] As a further description of the above technical solution:

[0011] The adjusting rod has fixing holes on its front and rear side walls, and the fixing holes are evenly distributed from left to right. The end of the fixing rod extends into the inner cavity of the fixing hole and engages with the inner wall of the fixing hole.

[0012] As a further description of the above technical solution:

[0013] The outer wall of the knob is evenly provided with teeth, and the front side wall of the hollow adjustment plate is fixedly connected to a limit block by bolts. The top of the limit block is engaged with the outer wall of the knob by the teeth.

[0014] As a further description of the above technical solution:

[0015] An adjusting screw is rotatably connected to the right side of the inner cavity wall of the long slot plate and above the positioning plate via a bearing. The left end of the adjusting screw extends to the outside of the long slot plate. A movable plate is screwed to the left side of the outer wall of the adjusting screw. The outer wall of the movable plate is slidably connected to the inner cavity wall of the long slot plate. A micro switch is fixedly connected to the right side wall of the movable plate and below the adjusting screw.

[0016] As a further description of the above technical solution:

[0017] A controller is fixedly connected to the middle of the front side wall of the long groove plate, and the controller is electrically connected to the micro switch and the cylinder body respectively.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This hydraulic cylinder, which facilitates stroke adjustment, allows for the removal of the adjusting rod from its fixed position when the stroke exceeds the maximum stroke of the hollow piston rod. The rod is then pulled out to a suitable length by rotating a knob, which in turn rotates a bidirectional screw. This rotation causes the T-blocks on both sides to move in opposite directions, engaging with the mounting slots. The T-blocks, through a fixed arc plate, guide the fixing rod into the current fixing hole, thus securing the adjusting rod. The limiting block, after being fixed, engages with the teeth on the knob surface to limit the knob's position, improving the fixing effect. This design allows for adjustment of the adjusting rod's length to adapt to different operating conditions when the stroke exceeds the maximum stroke of the hollow piston rod, thereby enhancing overall applicability.

[0020] 2. This hydraulic cylinder, which facilitates stroke adjustment, allows for easy movement of the movable plate and long slot plate by rotating the adjusting screw before use. The position of the microswitch is then adjusted according to the required extension stroke of the hollow piston rod during operation. During use, the controller activates the cylinder body, causing the hollow piston rod to move the mounting plate and connecting rod, which in turn moves the positioning plate within the long slot plate. When the hollow piston rod reaches its stroke point, the positioning plate contacts the microswitch, triggering it. The microswitch then closes the cylinder body via the controller. This design allows for easy limitation of the hollow piston rod's stroke without affecting the cylinder's sealing, resulting in a more accurate stopping position for the hollow piston rod. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a hydraulic cylinder that facilitates stroke adjustment according to the present invention.

[0022] Figure 2 This is a schematic front sectional view of the structure of a hydraulic cylinder that facilitates stroke adjustment according to this utility model.

[0023] Figure 3This is a left-side sectional view of the hollow adjusting plate structure of a hydraulic cylinder that facilitates stroke adjustment, as proposed in this utility model.

[0024] Figure 4 This is a front view schematic diagram of a structural limiting block for a hydraulic cylinder that facilitates stroke adjustment, as proposed in this utility model.

[0025] Figure 5 This utility model proposes a hydraulic cylinder with easily adjustable stroke. Figure 2 Enlarged structural diagram at point A in the middle.

[0026] In the diagram: 100, cylinder body; 110, hollow piston rod; 111, adjusting rod; 120, long slot plate; 121, mounting plate; 122, connecting rod; 123, positioning plate; 130, fixing hole; 140, adjusting screw; 141, movable plate; 142, micro switch; 150, controller; 200, hollow adjusting plate; 210, mounting slot; 211, T-block; 212, bidirectional screw; 213, knob; 214, fixing arc plate; 215, fixing rod; 220, limit block. Detailed Implementation

[0027] 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.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] This utility model provides a hydraulic cylinder with easily adjustable stroke. When the stroke length exceeds the maximum stroke length of the hollow piston rod 110, the length of the adjusting rod 111 can be adjusted according to the actual situation to adapt to different operating conditions, thereby improving overall applicability. (See also: [link to relevant documentation]) Figure 1-5 It includes the cylinder body 100 and the hollow adjusting plate 200;

[0031] Please refer to it again. Figure 1-4A hollow piston rod 110 is slidably connected to the inner wall of the cylinder body 100. The hollow piston rod 110 is used to move an object in conjunction with the cylinder body 100. The left end of the hollow piston rod 110 extends to the outside of the cylinder body 100 and is fixedly connected to the middle of the right side wall of the hollow adjusting plate 200. An adjusting rod 111 is slidably connected to the inner wall of the hollow piston rod 110. The adjusting rod 111 is used to connect to the object by extending the adjusting rod 111 to a suitable length when it is larger than the hollow piston rod 110. The left end of the adjusting rod 111 passes through the hollow adjusting plate 200 and extends to the outside of the hollow adjusting plate 200. The outer wall of the adjusting rod 111 is connected to the inner wall of the hollow adjusting plate 200. A sliding connection is used. The left side wall of the hollow adjusting plate 200, located on both sides of the adjusting rod 111, has mounting grooves 210 for mounting T-blocks 211. T-blocks 211 are slidably connected to the inner wall of the mounting groove 210. The T-blocks 211 are used to mount the fixed arc plate 214. The left side wall of the T-blocks 211 extends to the outside of the mounting groove 210. A double-acting screw 212 is rotatably connected to the upper rear side of the inner wall of the rear mounting groove 210 via a bearing. The double-acting screw 212 drives the T-blocks 211 on both sides to move in opposite directions. The front end of the double-acting screw 212 extends to the outside of the hollow adjusting plate 200 and is fixedly connected to a knob 213. The knob 213 drives the double-acting screw 212 to rotate. The T-shaped blocks 211 are screwed to the front and rear sides of the outer sidewalls of the bidirectional screw 212. The inner sidewalls of the front and rear T-shaped blocks 211, located outside the mounting groove 210, are fixedly connected to fixing arc plates 214. The fixing arc plates 214 are used to cooperate with fixing rods 215 to fix the adjusting rod 111. Fixing rods 215 are fixedly connected to the inner sidewalls of the front and rear fixing arc plates 214. The fixing rods 215 are used to cooperate with fixing holes 130 to fix the adjusting rod 111. Fixing holes 130 are opened on the front and rear sidewalls of the adjusting rod 111. The fixing holes 130 are used to cooperate with the fixing rods 215 to adjust the length of the adjusting rod 111. The fixing holes 130 are evenly distributed from left to right. The end of the fixing rod 215 extends into the inner cavity of the fixing hole 130 and... The inner wall of the fixing hole 130 is engaged. The outer wall of the knob 213 is evenly toothed, which is used to engage with the limiting block 220 to limit the knob 213. The front side wall of the hollow adjusting plate 200 is fixedly connected to the limiting block 220 by bolts. The limiting block 220 is used to limit the knob 213. The top of the limiting block 220 is engaged with the outer wall of the knob 213 by the toothed engagement. During operation, when the maximum stroke of the hollow piston rod 110 is encountered, the adjusting rod 111 is released from its fixed position and pulled out of the hollow piston rod 110 for a suitable length. Then, by rotating the knob 213, the bidirectional screw 212 is rotated. The rotation of the bidirectional screw 212 causes the front and rear T-blocks 211 to move in opposite directions in conjunction with the mounting groove 210.The T-block 211, through the fixed arc plate 214, drives the fixed rod 215 to be inserted into the current fixed hole 130, thus fixing the adjusting rod 111, adapting to different operating conditions. Then, by fixing the limit block 220 and engaging it with the teeth on the surface of the knob 213, the knob 213 is limited, improving the fixing effect.

[0032] In summary, when encountering a stroke length greater than the maximum stroke length of the hollow piston rod 110, the length of the adjusting rod 111 can be adjusted according to the actual situation to adapt to different operating conditions, thereby improving the overall applicability.

[0033] Please refer to it again. Figure 1-5A long slotted plate 120 is fixedly connected to the top of the cylinder body 100. The long slotted plate 120 is used to limit the movement of the movable plate 141 and the positioning plate 123. A mounting plate 121 is fixedly connected to the top of the hollow piston rod 110, located between the left end of the cylinder body 100 and the right side wall of the hollow adjusting plate 200. The mounting plate 121 is used to install the connecting rod 122. The connecting rod 122 is fixedly connected to the upper side of the right side wall of the mounting plate 121. The connecting rod 122 is used to install the positioning plate 123. The right end of the connecting rod 122 extends into the inner cavity of the long slotted plate 120 and is fixedly connected to the positioning plate 123. The positioning plate 123 is used to trigger the micro switch 1. 42. The outer wall of the positioning plate 123 is slidably connected to the inner wall of the long slot plate 120. An adjusting screw 140 is rotatably connected to the right side of the inner wall of the long slot plate 120, above the positioning plate 123, via a bearing. The adjusting screw 140 is used to drive the movable plate 141 to move. The left end of the adjusting screw 140 extends to the outer side of the long slot plate 120. The movable plate 141 is screwed to the left side of the outer wall of the adjusting screw 140. The movable plate 141 is used to adjust the micro switch 142 according to the required extension stroke of the hollow piston rod 110. The outer wall of the movable plate 141 is slidably connected to the inner wall of the long slot plate 120. The right side of the movable plate 141... A micro switch 142 is fixedly connected to the side wall below the adjusting screw 140. The micro switch 142 is used to accurately stop the hollow piston rod 110 after it reaches its stroke position. A controller 150 is fixedly connected to the middle of the front side wall of the long slot plate 120. The controller 150 is used to control the cylinder body 100. After the hollow piston rod 110 reaches its position, it is accurately stopped by the micro switch 142. The controller 150 is electrically connected to the micro switch 142 and the cylinder body 100 respectively. Before use, rotating the adjusting screw 140 drives the movable plate 141 to cooperate with the long slot plate 120. The position of the micro switch 142 is adjusted according to the required extension stroke of the hollow piston rod 110 during operation. During use, the cylinder body 100 is started by the controller 150, which causes the hollow piston rod 110 to drive the mounting plate 121 in conjunction with the connecting rod 122 to drive the positioning plate 123 to move in the long slot plate 120. When the hollow piston rod 110 moves to the stroke point, the positioning plate 123 contacts the micro switch 142 and triggers the micro switch 142. The micro switch 142 closes the cylinder body 100 through the controller 150, thereby limiting the stroke of the hollow piston rod 110 and making the hollow piston rod 110 stop accurately at the stroke point.

[0034] In summary, the stroke of the hollow piston rod 110 can be easily limited without affecting the sealing performance of the cylinder body 100, thereby making the stopping position of the hollow piston rod 110 more accurate.

[0035] In practical use, when the operator encounters a stroke greater than the maximum stroke of the hollow piston rod 110, the adjusting rod 111 is released from its fixed position and pulled out to a suitable length from the hollow piston rod 110. Then, by rotating the knob 213, the double-ended screw 212 is rotated. The rotation of the double-ended screw 212 causes the T-blocks 211 on both sides to move in opposite directions, engaging with the mounting grooves 210. The T-blocks 211, through the fixing arc plate 214, drive the fixing rod 215 into the current fixing hole 130 to fix the adjusting rod 111. Next, the limiting block 220 is fixed and engages with the teeth on the surface of the knob 213 to limit the knob 213, improving the fixing effect. Before use, the knob 213 is rotated... The adjusting screw 140 drives the movable plate 141 to move in conjunction with the long slot plate 120, thereby adjusting the position of the micro switch 142 according to the required extension stroke of the hollow piston rod 110 during operation. In use, the controller 150 starts the cylinder body 100, causing the hollow piston rod 110 to drive the mounting plate 121 in conjunction with the connecting rod 122 to move the positioning plate 123 in the long slot plate 120. When the hollow piston rod 110 moves to the stroke point, the positioning plate 123 contacts the micro switch 142, triggering the micro switch 142. The micro switch 142 closes the cylinder body 100 through the controller 150, thereby limiting the stroke of the hollow piston rod 110 and ensuring that the hollow piston rod 110 stops accurately at the stroke point.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A hydraulic cylinder with easily adjustable stroke, characterized in that: The system includes a cylinder body (100) and a hollow adjusting plate (200). A hollow piston rod (110) is slidably connected to the inner wall of the cylinder body (100). The left end of the hollow piston rod (110) extends to the outer side of the cylinder body (100), and the left end of the hollow piston rod (110) is fixedly connected to the middle of the right side wall of the hollow adjusting plate (200). An adjusting rod (111) is slidably connected to the inner wall of the hollow piston rod (110). The left end of the adjusting rod (111) passes through the hollow adjusting plate (200) and extends to the outer side of the hollow adjusting plate (200). The outer side wall of the adjusting rod (111) is slidably connected to the inner side wall of the hollow adjusting plate (200). A long groove plate (120) is fixedly connected to the top of the cylinder body (100). A mounting plate (121) is fixedly connected to the top of the hollow piston rod (110) and between the left end of the cylinder body (100) and the right side wall of the hollow adjusting plate (200). A connecting rod (122) is fixedly connected to the upper side of the right side wall of the mounting plate (121). The right end of the connecting rod (122) extends into the inner cavity of the long groove plate (120) and is fixedly connected to a positioning plate (123). The outer side wall of the positioning plate (123) is slidably connected to the inner wall of the long groove plate (120).

2. The hydraulic cylinder with easily adjustable stroke according to claim 1, characterized in that: The hollow adjusting plate (200) has mounting grooves (210) on its left side wall, located on both the front and rear sides of the adjusting rod (111). A T-shaped block (211) is slidably connected to the inner wall of the mounting groove (210). The left side wall of the T-shaped block (211) extends to the outside of the mounting groove (210). A bidirectional screw (212) is rotatably connected to the upper rear side of the inner wall of the rear mounting groove (210) via a bearing. The front of the bidirectional screw (212)... The end extends to the outside of the hollow adjustment plate (200) and is fixedly connected to a knob (213). The T-shaped blocks (211) on the front and rear sides are respectively screwed to the front and rear sides of the outer side wall of the bidirectional screw (212). The inner side wall of the T-shaped blocks (211) on the front and rear sides and located outside the mounting groove (210) is fixedly connected to a fixing arc plate (214). The inner side wall of the fixing arc plate (214) on the front and rear sides is fixedly connected to a fixing rod (215).

3. A hydraulic cylinder with easily adjustable stroke according to claim 2, characterized in that: The front and rear side walls of the adjusting rod (111) are provided with fixing holes (130), and the fixing holes (130) are evenly distributed from left to right. The end of the fixing rod (215) extends into the inner cavity of the fixing hole (130) and engages with the inner cavity wall of the fixing hole (130).

4. A hydraulic cylinder with easily adjustable stroke according to claim 2, characterized in that: The outer wall of the knob (213) is evenly provided with teeth, and the front side wall of the hollow adjustment plate (200) is fixedly connected to the limit block (220) by bolts. The top of the limit block (220) is engaged with the outer wall of the knob (213) by teeth.

5. A hydraulic cylinder with easily adjustable stroke according to claim 1, characterized in that: An adjusting screw (140) is rotatably connected to the right side of the inner cavity wall of the long slot plate (120) and above the positioning plate (123) via a bearing. The left end of the adjusting screw (140) extends to the outside of the long slot plate (120). A movable plate (141) is screwed to the left side of the outer wall of the adjusting screw (140). The outer wall of the movable plate (141) is slidably connected to the inner cavity wall of the long slot plate (120). A micro switch (142) is fixedly connected to the right side wall of the movable plate (141) and below the adjusting screw (140).

6. A hydraulic cylinder with easily adjustable stroke according to claim 5, characterized in that: A controller (150) is fixedly connected to the middle of the front side wall of the long groove plate (120). The controller (150) is electrically connected to the micro switch (142) and the cylinder body (100).

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