Built-in bidirectional telescopic buffer oil cylinder
By adopting a buffer ring structure in the hydraulic cylinder, the contact between the buffer head and the buffer ring and the cooperation between the slider and the buffer spring, the continuous increase in resistance is solved, and the problems of short cushioning stroke and poor effect of the existing hydraulic cylinder are solved. Achieve better buffering and longer service life.
Patent Information
- Application Number
- CN202421071732.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-16
AI Technical Summary
Among the buffering measures of existing hydraulic cylinders, the buffer stroke is short, resulting in poor buffering effect, and the elastic rubber pad is prone to deform under the impact, which requires frequent replacement.
Design a built-in bidirectional telescopic cushioning oil cylinder, adopting a buffer ring structure. When the piston is about to reach the end, the buffer head is in contact with the buffer ring. The buffer ring generates increasing resistance through the slider and the buffer spring to avoid the piston from being in contact with the cylinder. The buffer ring is a mechanical structure and is not easy to deform.
A long buffer stroke and linear growth resistance form is achieved, which significantly improves the buffering effect. The buffer ring is not easy to deform and has a long service life. It avoids direct collision between the piston and the cylinder, and improves the protection performance of the hydraulic cylinder.
Smart Images
Figure CN222254505U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hydraulic cylinder, in particular to a built-in bidirectional telescopic buffer oil cylinder, belonging to the technical field of hydraulic cylinders. Background Art
[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is smooth, so it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of the piston and the pressure difference on both sides; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application occasion, and other devices are indispensable. The bidirectional telescopic hydraulic cylinder is a double-rod hydraulic cylinder, which is a hydraulic cylinder with piston rods on both sides of the piston. It is generally bidirectional hydraulically driven and can achieve constant speed reciprocating motion.
[0003] The buffering measure of the existing hydraulic cylinder is usually to set an elastic rubber pad between the piston and the cylinder body, so that the piston directly contacts the elastic rubber pad when moving to the end position, and the elastic rubber pad bears the impact force to play a buffering role, thereby avoiding the piston from directly colliding with the cylinder body and causing damage to both. The core of this buffering measure is to use the deformation of the rubber pad to achieve the buffering effect, but the axial deformation of the rubber pad during the buffering process is small, so that the buffering stroke is extremely short, resulting in most of the impact force still needing to be dissipated by the piston and the cylinder body in a short time, and the protection effect is not good. At the same time, the rubber pad is easily deformed under the impact, so it needs to be replaced frequently. Therefore, in view of the above problems, a built-in two-way telescopic buffer oil cylinder is proposed. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a built-in two-way telescopic buffer cylinder, which can continuously apply increasing resistance through the buffer ring when the piston is about to reach the end, eventually causing the piston to stop and avoiding its direct collision with the cylinder body. The buffering effect can be improved with a longer buffering stroke, and at the same time, the structure is not easy to deform and will not age, thereby solving the technical problems of the short buffering stroke and poor buffering effect of the buffering measures of the hydraulic cylinder in the prior art.
[0005] In order to solve the above problems, the following technical solutions are provided:
[0006] A built-in bidirectional telescopic buffer oil cylinder is designed, comprising a middle cylinder and two end shells, the two end shells are detachably and tightly connected to the two sides of the middle cylinder, a piston is slidably arranged in the middle cylinder, buffer heads are fixedly arranged on both sides of the piston, a sealed rubber ring is fixedly sleeved on the piston, a transmission rod is fixedly connected to the buffer head, a buffer ring is detachably clamped on the end surface of the end shell adjacent to the middle cylinder, an oil pipe tightly connected to the end shell is fixedly arranged on the end shell, a sealing plug is fixedly arranged in the outer end opening of the end shell, and the end shell and the middle cylinder are fixedly connected by connecting bolts.
[0007] In the above-mentioned structure, when the piston is about to move to the end and collide with the end shell, the buffer head thereon will contact the buffer ring first. As the piston continues to move, the buffer head will continue to squeeze the buffer ring to deform it, so that the buffer ring can continue to provide increasing resistance, eventually causing the piston to stop and avoiding it from directly colliding with the end shell. Since the buffer ring has a longer buffer stroke and a linearly increasing resistance form, it can exert a better buffer effect. At the same time, the buffer ring is a mechanical structure and is not easy to deform and will not age.
[0008] Furthermore, the buffer ring includes a ring frame, and six sliding cylinders arranged equidistantly in a circular array are fixedly provided on the rear end face of the ring frame, a slider is slidably provided in the sliding cylinder, a connecting shaft is fixedly connected to the slider, a movable plate is fixedly connected to the end of the connecting shaft, a resist cylinder is fixedly provided on the front end face of the movable plate, and a buffer spring is provided on the outer sleeve of the connecting shaft.
[0009] In the above structure, when the buffer head moves and contacts the cylinder, it pushes the cylinder backward, thereby driving the movable plate backward, causing the slider to slide in the slide cylinder and continuously squeeze the buffer spring to deform it, thereby generating a continuously increasing buffer force, thereby achieving a better buffering effect.
[0010] Furthermore, three snap-in protrusions arranged equidistantly in a circular array are fixedly provided on the side of the ring frame, the snap-in protrusions are snap-fitted into the ring frame, and the ring frame is provided with six air holes arranged equidistantly in a circular array and connected to the slide cylinder.
[0011] In the above structural form, the snap-fitting protrusion is used to realize the detachable connection between the ring frame and the end shell, and is used to fix the entire buffer ring on the end shell, so as to facilitate the disassembly and maintenance of the entire buffer ring.
[0012] Furthermore, the outer cross-sectional diameter of the buffer cylinder is numerically smaller than the cross-sectional dimension of the buffer head.
[0013] The above-mentioned structural form can ensure close contact between the buffer head and the resistance tube, thereby realizing the transmission of impact force, and facilitating the movement of the buffer structure to play a buffering role.
[0014] Furthermore, the transmission rod comprises a sliding rod with a circular cross-section, and the outer end of the sliding rod is detachably connected to a connecting joint.
[0015] The above-mentioned structural form can, when disassembling the entire oil cylinder, remove the connecting joint and pull out the entire sliding rod from the end shell, thereby facilitating workers' inspection and maintenance.
[0016] Furthermore, six bolt holes arranged equidistantly in a circular array are provided on the end surface where the end shell is connected to the middle cylinder, and two sealing gaskets are fixedly arranged on the end surface.
[0017] The above structural form can realize a detachable connection between the end shell and the middle cylinder, which is convenient for workers to inspect and repair the inside of the cylinder body. At the same time, the sealing gasket can ensure the airtightness of the connection between the two.
[0018] Compared with the prior art, the beneficial effects of the utility model are:
[0019] In the utility model, a buffering effect is played by the arranged buffer head. When the piston is about to move to the end and collide with the end shell, the buffer head thereon will contact the buffer ring first. As the piston continues to move, the buffer head will continue to squeeze the buffer ring to deform it, so that the buffer ring can continue to provide increasing resistance, eventually causing the piston to stop and avoiding its direct collision with the end shell. It has a longer buffer stroke and a linearly increasing resistance form, and can exert a better buffering effect. At the same time, the buffer ring is a mechanical structure, which is not easy to deform and will not age. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0022] Figure 2 It is a cross-sectional view of the overall structure of the utility model;
[0023] Figure 3 This is a schematic diagram of the buffer ring structure of the utility model;
[0024] Figure 4 It is a partial structural schematic diagram of the utility model.
[0025] In the figure: 1. middle cylinder; 2. end shell; 21. bolt hole; 22. sealing gasket; 3. piston; 31. buffer head; 32. sealing rubber ring; 4. transmission rod; 41. sliding rod; 42. connecting joint; 5. buffer ring; 51. ring frame; 52. sliding cylinder; 53. sliding block; 54. connecting shaft; 55. movable sheet; 56. abutment cylinder; 57. buffer spring; 58. snap-fitting convex; 59. air hole; 6. oil pipe; 7. sealing plug; 8. connecting bolt. DETAILED DESCRIPTION
[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0027] like Figure 1 - Figure 2 As shown, a built-in bidirectional telescopic buffer oil cylinder provided in this embodiment includes a middle cylinder 1 and two end shells 2, the two end shells 2 are detachably and tightly connected to the two sides of the middle cylinder 1, a piston 3 is slidably arranged in the middle cylinder 1, buffer heads 31 are fixedly arranged on both sides of the piston 3, a sealed rubber ring 32 is fixedly sleeved on the piston 3, a transmission rod 4 is fixedly connected to the buffer head 31, a buffer ring 5 is detachably clamped on the end surface of the end shell 2 adjacent to the middle cylinder 1, an oil pipe 6 tightly connected to the end shell 2 is fixedly arranged, a sealing plug 7 is fixedly arranged in the outer opening of the end shell 2, and the end shell 2 and the middle cylinder 1 are connected. The two pistons are fixedly connected by connecting bolts 8. When the piston 3 is about to move to the end and collide with the end shell 2, the buffer head 31 thereon will contact the buffer ring 5 first. As the piston 3 continues to move, the buffer head 31 will continue to squeeze the buffer ring 5 to deform it, so that the buffer ring 5 can continue to provide increasing resistance, and finally cause the piston 3 to stop, avoiding it from directly colliding with the end shell 2. Since the buffer ring 5 has a longer buffer stroke and a linearly increasing resistance form, it can exert a better buffer effect. At the same time, the buffer ring 5 is a mechanical structure, so it is not easy to deform and will not age.
[0028] like Figure 3 As shown, the buffer ring 5 includes a ring frame 51, and six slide cylinders 52 arranged equidistantly in a circular array are fixedly provided on the rear end face of the ring frame 51, a slider 53 is slidably provided in the slide cylinder 52, a connecting shaft 54 is fixedly connected to the slider 53, a movable sheet 55 is fixedly connected to the end of the connecting shaft 54, a resist cylinder 56 is fixedly provided on the front end face of the movable sheet 55, and a buffer spring 57 is provided on the outer sleeve of the connecting shaft 54. In the above-mentioned structural form, when the buffer head 31 moves and contacts with the resist cylinder 56, it will push the resist cylinder 56 to move backward, thereby driving the movable sheet 55 to move backward, so that the slider 53 slides in the slide cylinder 52 and continuously squeezes the buffer spring 57 to deform it, thereby generating a continuously increasing buffer force, thereby achieving a better buffering effect.
[0029] In addition, three snap-in protrusions 58 are fixedly provided on the side of the ring frame 51 and are arranged equidistantly in a circular array. The snap-in protrusions 58 are snapped into the ring frame 51. The ring frame 51 is provided with six air holes 59 which are arranged equidistantly in a circular array and are connected to the slide cylinder 52. In the above-mentioned structural form, the snap-in protrusions 58 are used to realize the detachable connection between the ring frame 51 and the end shell 2, and are used to fix the entire buffer ring 5 on the end shell 2, so as to facilitate the disassembly and maintenance of the buffer ring 5 as a whole.
[0030] like Figure 2 - Figure 3 As shown, the outer cross-sectional diameter of the stopper 56 is numerically smaller than the cross-sectional size of the buffer head 31. The above-mentioned structural form can ensure the close contact between the buffer head 31 and the stopper 56, thereby realizing the transmission of impact force, and facilitating the movement of the buffer structure to play a buffering role.
[0031] like Figure 2 As shown, the transmission rod 4 includes a sliding rod 41 with a circular cross-section, and the outer end of the sliding rod 41 is detachably connected to a connecting joint 42. The above-mentioned structural form can remove the connecting joint 42 when disassembling the entire cylinder, and the entire sliding rod 41 can be pulled out from the end shell 2, thereby facilitating workers' inspection and maintenance.
[0032] like Figure 4 As shown, six bolt holes 21 are arranged equidistantly in a circular array on the end surface where the end shell 2 and the middle cylinder 1 are connected, and two sealing gaskets 22 are fixedly arranged on the end surface. The above-mentioned structural form can realize a detachable connection between the end shell 2 and the middle cylinder 1, which is convenient for workers to inspect and repair the inside of the cylinder body. At the same time, the sealing gasket 22 can ensure the airtightness of the connection between the two.
[0033] The use principle and use process of the utility model are as follows: when the piston 3 is about to move to the end and collide with the end shell 2, the buffer head 31 thereon will first contact the buffer ring 5. As the piston 3 continues to move, the buffer head 31 will continue to squeeze the buffer ring 5 to deform it, so that the buffer ring 5 can continue to provide increasing resistance, and finally cause the piston 3 to stop, avoiding it from directly colliding with the end shell 2. Because the buffer ring 5 has a longer buffer stroke and a linearly increasing resistance form, it can exert a better buffer effect.
[0034] The buffer ring 5 includes a ring frame 51, a slide cylinder 52, a slider 53, a connecting shaft 54, a movable sheet 55, a resistance cylinder 56 and a buffer spring 57. Specifically, when the buffer head 31 moves and contacts the resistance cylinder 56, it will push the resistance cylinder 56 to move backward, thereby driving the movable sheet 55 to move backward, so that the slider 53 slides in the slide cylinder 52 and continuously squeezes the buffer spring 57 to deform it, thereby generating a continuously increasing buffer force, which plays a better buffering role. At the same time, the buffer ring 5 is a mechanical structure as a whole, so it is not easy to deform, will not age, and has a long service life.
[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0036] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0037] The present invention is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on the spirit and principles of the present invention, and these modifications and variations are also within the scope of the present invention.
Claims
1. A built-in bidirectional telescopic buffer cylinder, comprising a middle cylinder (1) and two end shells (2), characterized in that: The two end shells (2) are detachably and hermetically connected to the two sides of the middle cylinder (1). A piston (3) is slidably arranged in the middle cylinder (1). Buffer heads (31) are fixedly arranged on both sides of the piston (3). A sealed rubber ring (32) is fixedly sleeved on the piston (3). A transmission rod (4) is fixedly connected to the buffer head (31). A buffer ring (5) is detachably clamped on the end surface of the end shell (2) adjacent to the middle cylinder (1). An oil pipe (6) hermetically connected to the end shell (2) is fixedly arranged. A sealed plug (7) is fixedly arranged in the outer end opening of the end shell (2). The end shell (2) and the middle cylinder (1) are fixedly connected via connecting bolts (8).
2. A built-in bidirectional telescopic buffer cylinder according to claim 1, characterized in that: The buffer ring (5) comprises a ring frame (51), the rear end surface of the ring frame (51) is fixedly provided with six slide cylinders (52) arranged equidistantly in a circumferential array, a slider (53) is slidably provided in the slide cylinder (52), a connecting shaft (54) is fixedly connected to the slider (53), a movable sheet (55) is fixedly connected to the end of the connecting shaft (54), a resisting cylinder (56) is fixedly provided on the front end surface of the movable sheet (55), and a buffer spring (57) is provided on the outer sleeve of the connecting shaft (54).
3. A built-in bidirectional telescopic buffer cylinder according to claim 2, characterized in that: The side of the ring frame (51) is fixedly provided with three clamping protrusions (58) arranged in a circumferential array at equal distances, and the clamping protrusions (58) are clamped in the ring frame (51). The ring frame (51) is provided with six air holes (59) arranged in a circumferential array at equal distances and connected to the slide cylinder (52).
4. The built-in bidirectional telescopic buffer cylinder according to claim 2, characterized in that: The outer cross-sectional diameter of the abutment cylinder (56) is numerically smaller than the cross-sectional dimension of the buffer head (31).
5. The built-in bidirectional telescopic buffer cylinder according to claim 1, characterized in that: The transmission rod (4) comprises a sliding rod (41) with a circular cross-section, and the outer end of the sliding rod (41) is detachably connected to a connecting joint (42).
6. The built-in bidirectional telescopic buffer cylinder according to claim 1, characterized in that: The end surface of the end shell (2) connected to the middle cylinder (1) is provided with six bolt holes (21) arranged equidistantly in a circumferential array, and two sealing gaskets (22) are fixedly arranged on the end surface.