Mechanism capable of adjusting starting speed of hydraulic oil cylinder
By designing an adjustable hydraulic cylinder start speed mechanism, the problem of uncontrollable hydraulic cylinder start speed is solved, flexible adjustment and stable maintenance of the start speed are achieved, and the smooth operation and safety of the equipment are improved.
Patent Information
- Application Number
- CN202422722406.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-11-08
AI Technical Summary
The existing hydraulic cylinders lack mechanisms that can adjust the starting speed, resulting in uncontrollable start speed, which may cause mechanical system impact, vibration, equipment failure and increased maintenance costs.
An adjustable hydraulic cylinder starting speed mechanism including oil cylinder, push rod, piston, control assembly and self-locking assembly is designed. The oil outlet hole area is adjusted through the coordination of the rotating shaft and the gear tooth groove, and the stop position is locked in combination with the ratchet pawl structure to achieve flexible adjustment and stable maintenance of the starting speed.
It realizes flexible adjustment of the starting speed of the hydraulic cylinder, avoids equipment impact and vibration, improves the smoothness and safety of equipment operation, and enhances the reliability and sealing of the mechanism.
Smart Images
Figure CN223257187U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of adjustable hydraulic oil cylinders, in particular to an adjustable hydraulic oil cylinder starting speed mechanism. Background Art
[0002] With the development of society, hydraulic cylinders play a vital role in many industrial fields. As an actuator that converts hydraulic energy into mechanical energy, hydraulic cylinders are widely used in engineering machinery, mining machinery, metallurgical equipment, aerospace and other fields. It can push the piston to perform linear reciprocating motion in the cylinder through the pressure of hydraulic oil, thereby realizing operations such as lifting, pushing, and stretching of the load.
[0003] In the practical application of hydraulic cylinders, starting speed is a key parameter. If the hydraulic cylinder does not have a mechanism to adjust the starting speed, in some equipment that requires high starting smoothness, excessive starting speed may cause shock and vibration in the mechanical system. This will not only accelerate the wear of equipment components and reduce the equipment's service life, but may also cause equipment failure due to uneven force at the moment of starting, affecting the continuity of the entire production process. Moreover, for some hydraulic cylinders that carry heavy loads, if the starting speed is uncontrollable, the instantaneous excessive impact force may exceed the cylinder's tolerance, causing serious failures such as cylinder leakage and piston damage, increasing repair costs and downtime. Summary of the Invention
[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an adjustable hydraulic cylinder starting speed mechanism.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: an adjustable hydraulic cylinder starting speed mechanism, comprising an oil cylinder, a front cylinder cover is fixedly mounted on the front end of the oil cylinder, a rear cylinder cover is fixedly mounted on the rear end of the oil cylinder, a first oil outlet hole is opened inside the front cylinder cover, a second oil outlet hole is opened inside the rear cylinder cover, both the first oil outlet hole and the second oil outlet hole are communicated with the interior of the oil cylinder, a push rod is slidably mounted inside the oil cylinder, a piston is fixedly mounted on the rear end of the push rod, the piston is located inside the oil cylinder, a control assembly is fixedly mounted on the top of the oil cylinder, and a self-locking assembly is mounted on the top of the control assembly;
[0006] The control assembly includes a block, a rotating shaft, a tooth groove and a gear. Two of the block are slidably installed on the top of the oil cylinder. Both of the block are located inside the first oil outlet hole and the second oil outlet hole. The rotating shaft is movably installed on the top of the oil cylinder. The gear is fixedly connected to the outer wall of the rotating shaft. The tooth groove is opened at the end of the block away from the oil outlet hole. The two tooth grooves are located on both sides of the gear and mesh with the gear.
[0007] Further: a first protective shell is fixedly connected to the top of the oil cylinder, a second protective shell is fixedly installed on the top of the first protective shell, the control component is located inside the first protective shell, and the self-locking component is located inside the second protective shell.
[0008] Further: the self-locking assembly includes a ratchet, a movable shaft, and a pawl. The ratchet is fixedly connected to the outer wall of the rotating shaft and is located at the top of the gear. The movable shaft is fixedly connected to the top of the first protective shell. The pawl is movably installed on the movable shaft and engages with the ratchet.
[0009] Further: the self-locking assembly also includes a spring, a push block and a slot, the spring is fixedly installed between the second protective shell and the pawl, the push block is fixedly connected to the rear end of the pawl, the slot is opened inside the second protective shell, and the push block is located inside the slot.
[0010] Further: screws are fixedly installed between the front cylinder cover and the rear cylinder cover, and there are four screws distributed in a rectangular shape. Nuts are threadedly installed on both ends of the screws, and the nuts are located on the outer walls of the front cylinder cover and the rear cylinder cover.
[0011] Further: the top of the rotating shaft is fixedly connected with a turning handle.
[0012] The utility model has the following beneficial effects:
[0013] 1. Compared with the prior art, the invention provides a first oil outlet, a second oil outlet, a push rod, a piston, a stopper, a rotating shaft, a turning handle, a tooth groove, and a gear. When in use, the turning handle is held and turned, and the turning handle drives the rotating shaft to rotate. The gear on the outer wall of the rotating shaft engages with the tooth groove on the stopper. As the rotating shaft rotates, the gear drives the tooth groove to move, causing the two stops to slide in the first oil outlet and the second oil outlet. To reduce the starting speed, the stopper is moved toward the center of the oil outlet to reduce the flow area of the oil outlet. In this way, the flow of hydraulic oil in and out of the oil cylinder will be reduced, and the speed at which the piston pushes the push rod in the oil cylinder will be slowed down, thereby reducing the starting speed. Conversely, moving the stopper toward the edge of the oil outlet can increase the starting speed. The present invention can flexibly adjust the starting speed of the hydraulic cylinder according to actual needs, effectively avoiding equipment shock and vibration problems caused by excessive starting speed, and improving the stability and safety of equipment operation.
[0014] 2. Compared to the prior art, by providing a stopper, rotating shaft, ratchet, pawl, spring, push block, and slot, once the starting speed is adjusted, the spring's elastic force keeps the pawl firmly engaged with the ratchet, preventing the rotating shaft from rotating due to external factors. This ensures the stopper's position remains unchanged, maintaining a stable starting speed. When the starting speed needs to be readjusted, the push block is pushed within the slot, compressing the spring and releasing the pawl from the ratchet. The rotating shaft can now rotate freely, allowing the starting speed to be readjusted. This utility model prevents accidental rotation of the rotating shaft and improves the reliability of the entire mechanism during operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;
[0017] Figure 3 This is a schematic diagram of the explosion structure of the control component in the utility model;
[0018] Figure 4 for Figure 3 A in the middle is an enlarged structural diagram;
[0019] Figure 5 This is a schematic diagram of the explosion structure of the self-locking component in the utility model;
[0020] Figure 6 for Figure 5 Enlarged structural diagram at point B in the middle.
[0021] Legend:
[0022] 1. Oil cylinder; 2. Front cylinder cover; 3. Rear cylinder cover; 4. First oil outlet; 5. Second oil outlet; 6. Push rod; 7. Piston; 8. Control assembly; 801. Stop block; 802. Rotating shaft; 803. Turn handle; 804. Tooth groove; 805. Gear; 9. Self-locking assembly; 901. Ratchet; 902. Movable shaft; 903. Pawl; 904. Spring; 905. Push block; 906. Slot; 10. First protective shell; 1001. Second protective shell; 11. Screw; 12. Nut. DETAILED DESCRIPTION
[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0024] Reference Figure 1-6The utility model provides an adjustable hydraulic cylinder starting speed mechanism: comprising an oil cylinder 1, a front cylinder cover 2 is fixedly mounted on the front end of the oil cylinder 1, a rear cylinder cover 3 is fixedly mounted on the rear end of the oil cylinder 1, a first oil outlet hole 4 is opened inside the front cylinder cover 2, a second oil outlet hole 5 is opened inside the rear cylinder cover 3, the first oil outlet hole 4 and the second oil outlet hole 5 are both connected to the interior of the oil cylinder 1, a push rod 6 is slidably mounted inside the oil cylinder 1, a piston 7 is fixedly mounted on the rear end of the push rod 6, the piston 7 is located inside the oil cylinder 1, and a control component 8 is fixedly mounted on the top of the oil cylinder 1. A self-locking component 9 is installed on the top of the component 8; the control component 8 includes a stopper 801, a rotating shaft 802, a tooth groove 804 and a gear 805. The stopper 801 has two sliding parts installed on the top of the oil cylinder 1. The two stoppers 801 are both located inside the first oil outlet 4 and the second oil outlet 5. The rotating shaft 802 is movably installed on the top of the oil cylinder 1. The gear 805 is fixedly connected to the outer wall of the rotating shaft 802. The tooth groove 804 is opened at the end of the stopper 801 away from the oil outlet. The two tooth grooves 804 are located on both sides of the gear 805 and mesh with the gear 805.
[0025] When the rotating shaft 802 rotates, the gear 805 and the tooth groove 804 cooperate to make the block 801 slide in the oil outlet hole. Their positions directly affect the flow area of the oil outlet hole. For example, when the starting speed needs to be reduced, the rotating shaft 802 can be rotated to move the block 801 toward the center of the oil outlet hole, reducing the flow area, thereby reducing the hydraulic oil flow, slowing down the movement speed of the piston 7, and realizing the adjustment of the starting speed.
[0026] Further, if Figure 1 As shown, the top of the oil cylinder 1 is fixedly connected to a first protective shell 10, the top of the first protective shell 10 is fixedly installed with a second protective shell 1001, the control component 8 is located inside the first protective shell 10, and the self-locking component 9 is located inside the second protective shell 1001.
[0027] Furthermore, the first protective shell 10 and the second protective shell 1001 form a closed protective space to protect the control component 8 and the self-locking component 9, thereby preventing external dust, debris, etc. from entering and avoiding interference with the normal operation of the control component 8 and the self-locking component 9.
[0028] In one embodiment, Figure 6 As shown, the self-locking assembly 9 includes a ratchet 901, a movable shaft 902, and a pawl 903. The ratchet 901 is fixedly connected to the outer wall of the rotating shaft 802 and is located at the top of the gear 805. The movable shaft 902 is fixedly connected to the top of the first protective shell 10. The pawl 903 is movably mounted on the movable shaft 902 and engages with the ratchet 901.
[0029] When the rotating shaft 802 is rotated to adjust the starting speed, the rotating shaft 802 cannot rotate freely due to the engagement of the pawl 903 and the ratchet 901, thereby locking the position of the stopper 801 to ensure that the starting speed will not be changed due to unexpected factors.
[0030] Furthermore, the self-locking assembly 9 also includes a spring 904, a push block 905 and a slot 906. The spring 904 is fixedly installed between the second protective shell 1001 and the pawl 903. The push block 905 is fixedly connected to the rear end of the pawl 903. The slot 906 is opened inside the second protective shell 1001, and the push block 905 is located inside the slot 906.
[0031] During use, the elastic force provided by the spring 904 causes the pawl 903 to be tightly clamped on the ratchet 901, so that the rotating shaft 802 cannot rotate freely. When the starting speed needs to be readjusted, the push block 905 is pushed to move in the slot 906 to compress the spring 904, so that the pawl 903 leaves the ratchet 901. At this time, the rotating shaft 802 can rotate freely, which facilitates the readjustment of the starting speed.
[0032] In one embodiment, Figure 5 As shown, screws 11 are fixedly installed between the front cylinder head 2 and the rear cylinder head 3. There are four screws 11 distributed in a rectangular shape. Nuts 12 are threadedly installed on both ends of the screws 11. The nuts 12 are located on the outer walls of the front cylinder head 2 and the rear cylinder head 3.
[0033] By tightening the nuts 12, the front cylinder cover 2 and the rear cylinder cover 3 are tightly fixed to the two ends of the oil cylinder 1. On the one hand, the sealing of the oil cylinder 1 is ensured to prevent leakage of hydraulic oil. On the other hand, this stable connection structure can withstand various forces generated by the oil cylinder 1 during operation, including the hydraulic oil pressure and the reaction force generated by the movement of the piston 7, thereby ensuring the integrity and stability of the entire oil cylinder 1 structure.
[0034] In one embodiment, Figure 5 As shown, the top of the rotating shaft 802 is fixedly connected to a turning handle 803 .
[0035] The rotating shaft 802 can be rotated by holding the turning handle 803 to adjust the position of the stopper 801 in the control assembly 8, thereby controlling the starting speed of the oil cylinder 1.
[0036] Working principle: When in use, hold the turning handle 803 and turn it. The turning handle 803 drives the rotating shaft 802 to rotate. The gear 805 on the outer wall of the rotating shaft 802 engages with the tooth groove 804 on the stopper 801. As the rotating shaft 802 rotates, the gear 805 drives the tooth groove 804 to move, causing the two stops 801 to slide in the first oil outlet 4 and the second oil outlet 5. If you want to reduce the starting speed, move the stopper 801 toward the center of the oil outlet hole to reduce the flow area of the oil outlet hole. In this way, the flow of hydraulic oil in and out of the oil cylinder 1 will decrease, and the speed at which the piston 7 pushes the push rod 6 in the oil cylinder 1 will slow down, thereby reducing the starting speed; conversely, moving the stopper 801 toward the edge of the oil outlet hole can increase the starting speed.
[0037] After adjusting the starting speed, the elastic force provided by spring 904 keeps pawl 903 firmly engaged with ratchet 901, preventing rotation of shaft 802 due to external factors. This ensures that the position of block 801 remains unchanged, maintaining a stable starting speed. When the starting speed needs to be readjusted, push block 905 moves within slot 906, compressing spring 904 and releasing pawl 903 from ratchet 901. Rotation shaft 802 can now rotate freely, allowing the starting speed to be readjusted.
[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. An adjustable hydraulic cylinder starting speed mechanism, comprising a cylinder (1), characterized in that: A front cylinder cover (2) is fixedly mounted on the front end of the oil cylinder (1), and a rear cylinder cover (3) is fixedly mounted on the rear end of the oil cylinder (1). A first oil outlet hole (4) is provided inside the front cylinder cover (2), and a second oil outlet hole (5) is provided inside the rear cylinder cover (3). Both the first oil outlet hole (4) and the second oil outlet hole (5) are connected to the interior of the oil cylinder (1). A push rod (6) is slidably mounted inside the oil cylinder (1), and a piston (7) is fixedly mounted on the rear end of the push rod (6). The piston (7) is located inside the oil cylinder (1). A control component (8) is fixedly mounted on the top of the oil cylinder (1), and a self-locking component (9) is mounted on the top of the control component (8). The control assembly (8) includes a stopper (801), a rotating shaft (802), a tooth groove (804) and a gear (805). The stopper (801) has two sliding parts installed on the top of the oil cylinder (1). The two stoppers (801) are both located inside the first oil outlet hole (4) and the second oil outlet hole (5). The rotating shaft (802) is movably installed on the top of the oil cylinder (1). The gear (805) is fixedly connected to the outer wall of the rotating shaft (802). The tooth groove (804) is opened at one end of the stopper (801) away from the oil outlet hole. The two tooth grooves (804) are located on both sides of the gear (805) and mesh with the gear (805).
2. The adjustable hydraulic cylinder starting speed mechanism according to claim 1, characterized in that: The top of the oil cylinder (1) is fixedly connected to a first protective shell (10), the top of the first protective shell (10) is fixedly mounted with a second protective shell (1001), the control component (8) is located inside the first protective shell (10), and the self-locking component (9) is located inside the second protective shell (1001).
3. The adjustable hydraulic cylinder starting speed mechanism according to claim 2, characterized in that: The self-locking assembly (9) comprises a ratchet (901), a movable shaft (902), and a pawl (903); the ratchet (901) is fixedly connected to the outer wall of the rotating shaft (802) and is located on the top of the gear (805); the movable shaft (902) is fixedly connected to the top of the first protective shell (10); and the pawl (903) is movably mounted on the movable shaft (902) and meshes with the ratchet (901).
4. The adjustable hydraulic cylinder starting speed mechanism according to claim 3, characterized in that: The self-locking assembly (9) further comprises a spring (904), a push block (905) and a slot (906), wherein the spring (904) is fixedly mounted between the second protective shell (1001) and the pawl (903), the push block (905) is fixedly connected to the rear end of the pawl (903), the slot (906) is provided inside the second protective shell (1001), and the push block (905) is located inside the slot (906).
5. The adjustable hydraulic cylinder starting speed mechanism according to claim 1, characterized in that: A screw rod (11) is fixedly installed between the front cylinder cover (2) and the rear cylinder cover (3), and the screw rods (11) have four arranged in a rectangular shape. Nuts (12) are threadedly installed at both ends of the screw rods (11), and the nuts (12) are located on the outer walls of the front cylinder cover (2) and the rear cylinder cover (3).
6. The adjustable hydraulic cylinder starting speed mechanism according to claim 1, characterized in that: The top of the rotating shaft (802) is fixedly connected to a turning handle (803).