An improved hydraulic cylinder

Abstract

The present invention provides an improved hydraulic cylinder, which belongs to the technical field of hydraulic cylinders, and includes a plurality of telescopic units, a plurality of primary reinforcement units, a plurality of secondary reinforcement units, and a clamping and fixing assembly. The telescopic units are slidably connected in sequence to form a telescopic assembly. The secondary reinforcement unit includes a cylinder body with a rod body slidably arranged thereon, and the rod body is hinged to the corresponding primary reinforcement unit, and an elastic body is arranged between the rod body and the cylinder body. In the improved hydraulic cylinder, the primary reinforcement unit cooperates with the secondary reinforcement unit to improve the working strength of the telescopic assembly and the stability and reliability of the working process, thereby improving the working stability and reliability of the hydraulic cylinder, and the secondary reinforcement unit cooperates with the clamping and fixing assembly to further improve the stability and reliability of the working process of the telescopic assembly, and the overall structure is simple, and the smoothness of the working process is high, which is conducive to improving the smoothness and stability of the continuous working of the hydraulic cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinders, in particular to an improved hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is one of the important actuators in the hydraulic system, and its main function is to convert hydraulic energy into mechanical energy.

[0003] Usually, a hydraulic cylinder mainly includes three parts: a cylinder body, a piston and a piston rod. The piston, as the main element for converting hydraulic energy into mechanical energy, will move back and forth in the cylinder body. The piston rod connects the piston with external mechanical components and needs to extend out of the cylinder body to work. It must withstand certain thrust, tension or bending moments during work. Therefore, the piston rod needs to have higher strength. At present, high-strength materials are usually selected for the piston rod to meet working requirements, or a support sleeve is added to support and guide the piston rod to improve the working strength of the piston rod as well as the stability and reliability during work. However, for telescopic hydraulic cylinders under high workload environments, the aforementioned method is difficult to fully guarantee the strength of the piston rod as well as the stability and reliability of the piston rod during work, thereby reducing the working stability and reliability of the hydraulic cylinder. Summary of the invention

[0004] The present invention provides an improved hydraulic cylinder to solve the problem that the telescopic hydraulic cylinder in the related art has low working stability and reliability under a high working load environment.

[0005] The present invention provides an improved hydraulic oil cylinder, which comprises a cylinder body and a plurality of telescopic units, which are slidably connected together in sequence to form a telescopic assembly, which is mounted on the cylinder body; a plurality of primary reinforcement units, which slide together in sequence and correspond one-to-one with the telescopic units and are rotationally connected with the corresponding telescopic units; a plurality of secondary reinforcement units, which correspond one-to-one with the primary reinforcement units, and the secondary reinforcement units comprise a cylinder body with a rod body slidably arranged thereon, the rod body is hinged to the corresponding primary reinforcement unit, and an elastic body is arranged between the rod body and the cylinder body, during the extension of the rod body, the elastic body is compressed to provide a pulling force, and during the retraction of the rod body, the elastic body provides a reset force; a clamping and fixing assembly, which is mounted on any cylinder body and comprises a base, a clamping head and a control member are arranged on the base, the clamping heads are symmetrically distributed, and the clamping areas of the symmetrically distributed clamping heads cover all the rod bodies, so that all the rod bodies can be clamped and fixed uniformly, and the control member controls the symmetrical clamping heads to move synchronously in the opposite direction.

[0006] In one possible implementation, the first-level reinforcement unit includes a support frame fixedly provided with a connecting head, the support frame is provided with a transverse limiting groove, a longitudinal limiting groove and a sliding member, the sliding member is fixedly connected to the support frame, and in two first-level reinforcement units that are slidably connected to each other, the support frame in one of the first-level reinforcement units slides along the transverse limiting groove on the support frame in the other first-level reinforcement unit, and the sliding member on the corresponding support frame slides along the longitudinal limiting groove in the other support frame.

[0007] In one possible implementation, the rod body is a cylindrical structure, and the elastomer includes a plurality of elastic parts and a plurality of connecting parts with an annular structure. The elastic parts and the connecting parts are alternately distributed along the rod body and are all sleeved on the rod body, wherein the connecting part close to the end of the rod body located in the cylinder is fixedly connected to the rod body, and the remaining connecting parts are all slidably connected to the rod body, and the connecting parts are all slidably connected to the cylinder, and contact balls are evenly distributed on the circumferential surface of the connecting parts.

[0008] In one possible implementation, the longitudinal limiting groove includes a direct limiting section and an indirect limiting section, a roller limiting area is arranged in the indirect limiting section, the direct limiting section and the indirect limiting section are distributed in sequence along the direction of sliding and unfolding of the support frame, and the roller limiting area is symmetrically distributed up and down and is located on the upper and lower sides of the sliding member.

[0009] In one possible implementation, the clamping head includes a rigid clamping body and a flexible contact body covering the rigid clamping body and in contact with the rod body. The flexible contact body is in direct contact with the rod body and, during the clamping and fixing process, deforms according to the state of the rod body when it contacts the flexible contact body, thereby maintaining a close contact state with the rod body.

[0010] In one possible implementation, the total number of the telescopic units is an odd number, and the total number of the corresponding first-level reinforcement units and the second-level reinforcement units is also an odd number. The base is installed on the cylinder in one of the second-level reinforcement units, and the second-level reinforcement unit corresponds to the first-level reinforcement unit located in the middle among the first-level reinforcement units that are slidably connected in sequence.

[0011] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0012] 1. According to an improved hydraulic cylinder provided by an embodiment of the present invention, the first-level reinforcement unit cooperates with the second-level reinforcement unit to improve the working strength of the telescopic component and the stability and reliability of the working process, thereby improving the working stability and reliability of the hydraulic cylinder, and the second-level reinforcement unit cooperates with the clamping and fixing component to further improve the stability and reliability of the working process of the telescopic component, and the overall structure is simple, the working process is smooth, which is conducive to improving the smoothness and stability of the continuous work of the hydraulic cylinder.

[0013] 2. According to an improved hydraulic cylinder provided by an embodiment of the present invention, during the extension of the telescopic component, the force generated by the compression of the elastic body acts on the support frame through the rod body, and at the same time, combined with the clamping and fixing force of the clamping and fixing component on the rod body, the stability of the position state of the support frame is effectively improved. During the contraction and reset of the telescopic component, the elastomer releases the compression deformation force to assist the rod body in resetting, thereby improving the smoothness and stability of the reciprocating extension and retraction of the rod body, thereby improving the smoothness and stability of the working process of the overall structure.

[0014] 3. According to an improved hydraulic cylinder provided by an embodiment of the present invention, a plurality of elastic parts and a plurality of connecting parts are alternately distributed in sequence to form a multi-stage elastic zone, which is beneficial to improving the stability and reliability of the sliding process of the rod body with a longer sliding stroke, and the rod body is slidably connected to the cylinder body through the connecting part, which reduces the friction force of the rod body sliding process and further improves the smoothness and stability of the rod body sliding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a telescopic unit, a primary reinforcement unit, a secondary reinforcement unit and a clamping and fixing assembly of an improved hydraulic cylinder provided in an embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the working state changes of the secondary enhancement unit of an improved hydraulic cylinder provided by an embodiment of the present invention.

[0017] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0018] Figure 4 It is a structural schematic diagram of a connecting head, a supporting frame and a sliding part of an improved hydraulic cylinder provided in an embodiment of the present invention.

[0019] Figure 5 It is a structural schematic diagram of a transverse limiting slide groove and a longitudinal limiting slide groove of an improved hydraulic cylinder provided in an embodiment of the present invention.

[0020] In the figure: 1. Cylinder body; 2. Telescopic unit; 3. Primary reinforcement unit; 31. Connecting head; 32. Support frame; 33. Horizontal limiting slide; 34. Longitudinal limiting slide; 341. Direct limiting section; 342. Indirect limiting section; 343. Roller limiting area; 35. Sliding member; 4. Secondary reinforcement unit; 41. Rod body; 42. Cylinder body; 43. Elastomer; 431. Elastic member; 432. Connecting member; 433. Contact ball; 5. Clamping and fixing assembly; 51. Base; 52. Clamping head; 521. Rigid clamping body; 522. Flexible contact body; 53. Control member; 6. Fixed mounting seat. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] See also Figure 1 , an improved hydraulic cylinder, comprising a cylinder body 1, a plurality of telescopic units 2, a plurality of primary reinforcement units 3, a plurality of secondary reinforcement units 4 and a clamping and fixing assembly 5, the number of the telescopic units 2 is three and they are distributed from left to right and slidably connected together in sequence to form a telescopic assembly, the telescopic assembly is installed in the cylinder body 1 and connects the piston in the cylinder body 1 and the external mechanical structure together, the diameter of the telescopic unit 2 gradually increases from left to right, the primary reinforcement unit 3 corresponds to the telescopic unit 2 one by one and is distributed from left to right and slidably connected together in sequence, the primary reinforcement unit 3 comprises a support frame 32 fixedly connected with a connecting head 31, the connecting head 31 is an annular structure and is sleeved on the corresponding telescopic unit 2 and is rotatably connected to the corresponding telescopic unit 2, the left end of the support frame 32 is fixedly connected to the corresponding connecting head 31, the right end is slidably connected to the support frame 32 located on the right, the rightmost support frame 32 is slidably connected to the cylinder body 1, during the working process, when the telescopic assembly extends to the left, the corresponding support frame 32 slides and unfolds in sequence and provides support force for the corresponding telescopic unit 2, thereby increasing the strength of the telescopic unit 2.

[0023] See also Figure 1 and Figure 2 The secondary reinforcement unit 4 includes a cylinder 42 slidably connected to a rod body 41. The lower end of the rod body 41 is hinged to the support frame 32 in the corresponding primary reinforcement unit 3. The upper end of the cylinder 42 is installed in the fixed installation area or the fixed installation seat 6 at the work site through a hinge seat. An elastic body 43 is arranged between the rod body 41 and the cylinder 42. During the extension of the telescopic component, the rod body 41 moves with the corresponding support frame 32 and slides and extends on the corresponding cylinder 42. During this process, the elastic body 43 will be compressed, so that its deformation generates a force acting on the rod body 41, and the rod body 41 acts on the corresponding support frame 32 to form an upward pulling force, thereby improving the working stability of the support frame 32. During the contraction and reset process of the telescopic component, the elastic body 43 releases the compression deformation force, which is beneficial to assist the contraction and reset of the rod body 41, and improves the stability and reliability of the entire telescopic working process of the telescopic component.

[0024] See also Figure 1 , Figure 2 and Figure 3The rod body 41 is a cylindrical structure, and the elastic body 43 includes a plurality of elastic members 431 and a plurality of connecting members 432 of annular structure. The elastic members 431 and the connecting members 432 are alternately distributed along the rod body 41 and are all sleeved on the rod body 41. Among them, the connecting member 432 located at the upper end of the rod body 41 is fixedly connected to the rod body 41, and the remaining connecting members 432 are all slidably connected to the rod body 41, and the connecting members 432 are all slidably connected to the cylinder body 42. The rod body 41 is slidably connected to the cylinder body 42 through the connecting member 432, thereby reducing the contact surface between the rod body 41 and the cylinder body 42 and improving the smoothness of the sliding process of the rod body 41. The elastic member 431 and the connecting member 432 are fixedly connected to the rod body 41, and the connecting member 432 is fixedly connected to the rod body 41. 32 are distributed alternately in sequence to form a multi-stage elastic zone. Since the sliding stroke of the rod body 41 is long, the multi-stage elastic zone can effectively prevent the elastic member 431 from getting stuck during the compression process and affecting the reset situation, which is beneficial to improving the stability and reliability of the sliding process of the rod body 41. Among them, contact balls 433 are evenly distributed on the circumferential surface of the connecting member 432, which further reduces the friction and improves the smoothness of the sliding process of the rod body 41. Secondly, lubricant can be injected into the cylinder 42 according to actual needs to further improve the smoothness of the reciprocating movement of the rod body 41.

[0025] See also Figure 1 The clamping and fixing component 5 is installed on the middle cylinder 42 and the clamping and fixing component 5 includes a base 51, the base 51 is fixedly connected to the middle cylinder 42 and a clamping head 52 and a control component 53 are arranged on the base 51, the clamping heads 52 are symmetrically distributed and connected to the base 51 for forward and backward sliding, and the clamping areas of the symmetrically distributed clamping heads 52 cover all the rod bodies 41. When the telescopic component is extended to a preset position, the control component 53 controls the clamping head 52 to move toward the middle rod body 41 and clamp and fix all the rod bodies 41, so that the rod bodies 41 are stably in the current position state, thereby providing a stable upper pulling force for the support frame 32 to improve the stability of the position state of the support frame 32.

[0026] See also Figure 1 The clamping head 52 includes a rigid clamping body 521 and a flexible contact body 522 covering the rigid clamping body 521 and in contact with the rod body 41. The flexible contact body 522 is in direct contact with the rod body 41 and deforms according to the state of the rod body 41 when it contacts it during the clamping and fixing process, maintaining a close contact state with the rod body 41, thereby increasing the clamping force acting on the rod body 41 and thereby improving the stability of the position state of the rod body 41.

[0027] See also Figure 1 , Figure 4 and Figure 5The support frame 32 is provided with a transverse limiting groove 33, a longitudinal limiting groove 34 and a sliding member 35. The sliding member 35 is fixedly connected to the support frame 32. The support frame 32 on the left side of the current support frame 32 slides in the transverse limiting groove 33 on the current support frame 32, and the sliding member 35 on the left support frame 32 slides in the longitudinal limiting groove 34 on the current support frame 32. The transverse limiting groove 33 limits the corresponding support frame 32 from the front and rear directions, and the longitudinal limiting groove 34 limits the corresponding support frame 32 from the up and down directions to improve the stability and reliability of the working state of the support frame 32.

[0028] See also Figure 4 and Figure 5 The longitudinal limiting slide 34 includes a direct limiting section 341 and an indirect limiting section 342. The indirect limiting section 342 is provided with a roller limiting area 343. The indirect limiting section 342 is located on the left side of the corresponding direct limiting section 341. The roller limiting area 343 is symmetrically distributed in the indirect limiting section 342 and is respectively located on the upper and lower sides of the sliding member 35. Figure 5 As shown, the roller limiting area 343 includes a connection seat provided with a plurality of rollers, and the rollers are evenly distributed from left to right and directly contact the sliding member 35 to limit the sliding member 35, and on the basis of ensuring the limiting stability, reduce the friction force on the sliding member 35, and improve the smoothness of the sliding of the sliding member 35, especially in the process of the sliding member 35 resetting, such as Figure 5 As shown, at this time, most of the sliding member 35 has been offset from the longitudinal limit slot 34 and is not in the limit area of ​​the longitudinal limit slot 34. When the sliding member 35 is reset, the limiting of the sliding member 35 by the roller reduces the friction force on the sliding member 35, which is beneficial to the smooth reset of the sliding member 35, improves the smoothness of the reciprocating sliding of the sliding member 35, and improves the stability and reliability of the telescopic operation of the telescopic assembly.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection 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 invention can be understood according to specific circumstances.

[0031] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An improved hydraulic cylinder, characterized in that: It comprises a cylinder body (1) and a plurality of telescopic units (2), wherein the telescopic units (2) are slidably connected in sequence to form a telescopic assembly, and the telescopic assembly is mounted on the cylinder body (1); A plurality of primary reinforcement units (3), wherein the primary reinforcement units (3) slide together in sequence and correspond one-to-one with the telescopic units (2) and are rotationally connected with the corresponding telescopic units (2); A plurality of secondary reinforcement units (4), wherein the secondary reinforcement units (4) correspond to the primary reinforcement units (3) one by one, and the secondary reinforcement units (4) comprise a cylinder (42) on which a rod body (41) is slidably arranged, the rod body (41) is hinged to the corresponding primary reinforcement unit (3), and an elastic body (43) is arranged between the rod body (41) and the cylinder (42), and when the rod body (41) is extended, the elastic body (43) is compressed to provide a pulling force, and when the rod body (41) is retracted, the elastic body (43) provides a restoring force; A clamping and fixing assembly (5), wherein the clamping and fixing assembly (5) is installed on any cylinder (42) and comprises a base (51), a clamping head (52) and a control member (53) are arranged on the base (51), the clamping heads (52) are symmetrically distributed and the clamping areas of the symmetrically distributed clamping heads (52) cover all the rod bodies (41), and all the rod bodies (41) are uniformly clamped and fixed, and the control member (53) controls the symmetrical clamping heads (52) to move synchronously in opposite directions; The primary reinforcement unit (3) comprises a support frame (32) fixedly provided with a connecting head (31); the support frame (32) is provided with a transverse limiting slide groove (33), a longitudinal limiting slide groove (34) and a sliding member (35); the sliding member (35) is fixedly connected to the support frame (32); in two primary reinforcement units (3) slidably connected to each other, the support frame (32) in one of the primary reinforcement units (3) slides along the transverse limiting slide groove (33) on the support frame (32) in the other primary reinforcement unit (3), and the sliding member (35) on the corresponding support frame (32) slides along the longitudinal limiting slide groove (34) in the other support frame (32); The rod body (41) is a cylindrical structure, and the elastic body (43) includes a plurality of elastic members (431) and a plurality of connecting members (432) of annular structures. The elastic members (431) and the connecting members (432) are alternately distributed along the rod body (41) and are sleeved on the rod body (41), wherein the connecting member (432) close to the end of the rod body (41) located in the cylinder (42) is fixedly connected to the rod body (41), and the remaining connecting members (432) are all slidably connected to the rod body (41), and the connecting members (432) are all slidably connected to the cylinder (42), and contact balls (433) are evenly distributed on the circumferential surface of the connecting member (432); The longitudinal limiting slide groove (34) comprises a direct limiting section (341) and an indirect limiting section (342), a roller limiting area (343) is arranged in the indirect limiting section (342), the direct limiting section (341) and the indirect limiting section (342) are sequentially distributed along the direction in which the support frame (32) slides and unfolds, and the roller limiting area (343) is symmetrically distributed up and down and is located on the upper and lower sides of the sliding member (35).

2. An improved hydraulic cylinder according to claim 1, characterized in that: The clamping head (52) comprises a rigid clamping body (521) and a flexible contact body (522) covering the rigid clamping body (521) and in contact with the rod body (41); the flexible contact body (522) is in direct contact with the rod body (41) and deforms according to the state of the rod body (41) when in contact with it during the clamping and fixing process, and maintains a state of close contact with the rod body (41).

3. An improved hydraulic cylinder according to claim 1, characterized in that: The total number of the telescopic units (2) is an odd number, and the total number of the corresponding primary reinforcement units (3) and secondary reinforcement units (4) is also an odd number. The base (51) is mounted on a cylinder (42) in one of the secondary reinforcement units (4), and the secondary reinforcement unit (4) corresponds to the primary reinforcement unit (3) located in the middle of the primary reinforcement units (3) that are slidably connected in sequence.

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