Detachable mechanical self-locking hydraulic oil cylinder

Abstract

The utility model relates to a detachable mechanical self-locking type hydraulic oil cylinder which comprises an oil cylinder body and a hydraulic oil cylinder, the oil cylinder body comprises an oil cylinder body and a piston rod, one end of the piston rod is located in the oil cylinder body and connected with the oil cylinder body in a sliding mode, and the end, extending out of the oil cylinder body, of the piston rod is provided with external threads; the self-locking mechanism comprises a nut connected with the external threads of the piston rod, a plurality of adjusting laminations are sequentially laminated on the piston rod between the nut and the oil cylinder body, and the adjusting laminations are detachably connected with the piston rod. According to the detachable mechanical self-locking hydraulic oil cylinder, external threads are arranged at the end, extending out of the oil cylinder body, of the piston rod, the piston rod is connected with a self-locking mechanism, the self-locking mechanism comprises a nut in threaded connection with the piston rod, and a plurality of adjusting laminations are sequentially laminated on the piston rod between the nut and the oil cylinder body. Mechanical self-locking is achieved by adjusting mutual combination of the laminations and the nut, the number of the laminations is adjusted to be additionally installed according to needs, the laminations are detachably connected with the piston rod, and therefore the purpose of reducing the minimum installation distance of the oil cylinder body is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic cylinders, and in particular to a detachable mechanical self-locking hydraulic cylinder. Background Art

[0002] In the engineering application of hydraulic cylinders, with the upgrading of technology, the functions that hydraulic cylinders need to meet are increasing. In application scenarios that require stepless load self-locking, such as when used as a jacking cylinder, it generally adopts a mechanical self-locking method.

[0003] In mechanical self-locking, a nut is generally installed on the piston rod. Its load-bearing capacity is greater than that of hydraulic circuit self-locking, but this method will increase the minimum installation length of the hydraulic cylinder by nearly 1.5 times. In application scenarios with compact space, other spaces will be compressed during the design, increasing the design difficulty.

[0004] In the related art, the mechanical self-locking cylinder is mainly composed of a cylinder body, a piston and a nut. The piston and the nut are matched by threads, see Figure 3 As shown, the stroke does not exceed 320mm, and the thread length needs to be greater than 320mm, so that when the maximum stroke is reached, there is still enough thread length to meet the load-bearing requirements.

[0005] When ejecting, after the cylinder is extended to the predetermined position, the nut is tightened to press against the cylinder body, and then the oil circuit is depressurized, and the thread load is utilized to achieve stepless mechanical self-locking; when retracting, first oil is added to eject the piston, and after the nut is rotated back, the piston is retracted.

[0006] The minimum installation distance of the cylinder refers to the distance from the bottom of the cylinder to the center of the piston earring, that is, Figure 3 From the 1525mm in the figure, it can be seen that the minimum installation distance of the mechanical self-locking cylinder is longer than the length of the nut part of the ordinary cylinder, and the length of the nut is greater than the sum of the stroke and the minimum load-bearing thread length, that is, Figure 3 The minimum installation distance is 500mm, which increases the minimum installation distance by about half. In space-constrained application scenarios, the minimum installation space often cannot meet the cylinder stroke requirements. Summary of the invention

[0007] The embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder to solve the problem in the related art that the mechanical self-locking cylinder is difficult to use in application scenarios with limited space.

[0008] The embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder, comprising:

[0009] The oil cylinder body comprises an oil cylinder body and a piston rod at one end of which is located in the oil cylinder body and is slidably connected to the oil cylinder body, and an end of the piston rod extending out of the oil cylinder body is provided with an external thread;

[0010] A self-locking mechanism comprises a nut connected to the external thread of the piston rod, a plurality of adjustment laminations are sequentially stacked on the piston rod between the nut and the cylinder body, and the adjustment laminations are detachably connected to the piston rod.

[0011] In some embodiments: the thread length of the external thread is greater than the sum of the thickness of the nut and the thickness of the single-piece adjusting lamination, so that the nut moves on the piston rod in a direction approaching or away from the adjusting lamination.

[0012] In some embodiments: the adjustment lamination includes two mutually opposed semicircular ring-shaped steel rings, and the two mutually opposed semicircular ring-shaped steel rings are connected to each other to form a circular ring structure surrounding the piston rod.

[0013] In some embodiments: one end of the two mutually engaged semicircular steel rings are connected to each other by a hinge, and the other end is connected to each other by a buckle.

[0014] In some embodiments: connecting plates are provided at both ends of the semicircular steel ring, and bolts are used to pass through two adjacent connecting plates to fix the two semicircular steel rings that are aligned with each other together to form a circular ring.

[0015] In some embodiments: a plurality of threaded holes are provided on the outer wall of the nut, and a handle for driving the nut to rotate on the piston rod is threadedly connected to each of the threaded holes.

[0016] In some embodiments: a ball head is provided at one end of the piston rod close to the external thread, a mounting plate is rotatably connected to the ball head, a ball socket matched with the ball head and a baffle for limiting the ball head in the ball socket are provided on the mounting plate.

[0017] In some embodiments: the adjustment stack is a steel plate structure with a set thickness, and a "U"-shaped slot matching the outer diameter of the piston rod is opened on the adjustment stack.

[0018] In some embodiments: the notch of the "U"-shaped slot of the adjustment stack is slidably connected to a slider for opening or closing the notch.

[0019] In some embodiments: the maximum thickness of the adjustment lamination is less than the thread length of the external thread.

[0020] The beneficial effects of the technical solution provided by this application include:

[0021] The embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder. Since the detachable mechanical self-locking hydraulic cylinder of the present application is provided with a cylinder body, the cylinder body includes a cylinder body and a piston rod at one end of which is located in the cylinder body and slidably connected to the cylinder body, and an external thread is provided at the end of the piston rod extending out of the cylinder body; a self-locking mechanism, the self-locking mechanism includes a nut connected to the external thread of the piston rod, and a plurality of adjustment laminations are sequentially stacked on the piston rod between the nut and the cylinder body, and the adjustment laminations are detachably connected to the piston rod.

[0022] Therefore, the detachable mechanical self-locking hydraulic cylinder of the present application is provided with an external thread at one end of the piston rod extending out of the cylinder body, and a self-locking mechanism is connected to the piston rod, the self-locking mechanism includes a nut threadedly connected to the piston rod, and a plurality of adjustment laminations are sequentially stacked on the piston rod between the nut and the cylinder body, and the adjustment laminations are detachably connected to the piston rod. The adjustment laminations and the nut are combined to achieve mechanical self-locking, and the number of adjustment laminations is added as needed and detachably connected to the piston rod, thereby achieving the purpose of reducing the minimum installation distance of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0025] Figure 2 This is a schematic structural diagram of a semicircular ring steel ring according to an embodiment of the present application;

[0026] Figure 3 It is a structural schematic diagram of a mechanical self-locking cylinder in the background technology.

[0027] Reference numerals:

[0028] 10. Cylinder body; 11. Cylinder body; 12. Piston rod; 13. External thread; 14. Ball head; 15. Mounting plate; 16. Baffle; 20. Self-locking mechanism; 21. Nut; 22. Adjusting lamination; 23. Semicircular steel ring; 24. Connecting plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder, which can solve the problem in the related art that the mechanical self-locking cylinder is difficult to use in application scenarios with limited space.

[0031] See also Figure 1 As shown, the embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder, comprising:

[0032] The cylinder body 10 comprises a cylinder body 11 and a piston rod 12 at one end of which is located inside the cylinder body 11 and is slidably connected to the cylinder body 11 , and an end of the piston rod 12 extending outside the cylinder body 11 is provided with an external thread 13 .

[0033] The self-locking mechanism 20 includes a nut 21 connected to the external thread 13 of the piston rod 12 , and a plurality of adjustment laminations 22 are sequentially stacked on the piston rod 12 between the nut 21 and the cylinder body 11 , and the adjustment laminations 22 are detachably connected to the piston rod 12 .

[0034] The adjustment stack 22 and the nut 21 of the embodiment of the present application are combined to achieve mechanical self-locking. The number of adjustment stacks 22 is added as needed and is detachably connected to the piston rod 12, thereby achieving the purpose of reducing the minimum installation distance of the cylinder body 10.

[0035] When installing the oil cylinder body 10 , there is no need to install the adjustment stack 22 on the oil cylinder body 10 , so the minimum installation distance is increased by the thickness of the nut 21 compared with the ordinary oil cylinder.

[0036] When the piston rod 12 is pushed out, the nut 21 is located Figure 1 At the rightmost position, after the piston rod 12 reaches the predetermined position, the adjusting lamination 22 is installed until the remaining gap width is smaller than the thickness of the single-piece adjusting lamination 22, the nut 21 is tightened to resist the adjusting lamination 22, and then the oil circuit is depressurized.

[0037] When the piston rod 12 contracts, the cylinder body 10 first supplies oil to push out the piston rod 12, then removes the adjustment stack 22 and screws the nut 21 to the initial position. After the piston rod 12 reaches the predetermined position, the nut 21 is tightened and the oil circuit is depressurized.

[0038] In some alternative embodiments: See Figure 1As shown, an embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder, wherein the thread length of the external thread 13 of the detachable mechanical self-locking hydraulic cylinder is greater than the sum of the thickness of the nut 21 and the thickness of the single-piece adjustment stack 22, so that the nut 21 can move on the piston rod 12 in a direction approaching or away from the adjustment stack 22.

[0039] The thread length of the external thread 13 in the embodiment of the present application is greater than the sum of the thickness of the nut 21 and the thickness of the single-piece adjustment lamination 22. When the distance between the stacked adjustment lamination 22 and the nut 21 is less than the thickness of the single-piece adjustment lamination 22, it is convenient for the nut 21 to rotate in the direction of the adjustment lamination 22 to press the adjustment lamination 22, thereby realizing stepless regulation.

[0040] In some alternative embodiments: See Figure 1 and Figure 2 As shown, an embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder, the adjustment stack 22 of which includes two mutually opposed semicircular steel rings 23, which are interconnected to form a circular ring structure surrounding the piston rod 12.

[0041] Specifically, one end of the two semicircular ring steel rings 23 facing each other is connected to each other by a hinge, and the other end is connected to each other by a buckle. When installing or removing the two semicircular ring steel rings 23 facing each other, the buckle can be manually locked or unlocked without using a manipulation tool, which is convenient for on-site operation of the semicircular ring steel rings 23.

[0042] Alternatively, connecting plates 24 are provided at both ends of the semicircular steel ring 23. When the semicircular steel rings 23 are aligned with each other to form a circular ring structure, bolts are passed through two adjacent connecting plates 24 to fix the two aligned semicircular steel rings 23 together to form a circular ring. The radius of the two aligned semicircular steel rings 23 is greater than the radius of the piston rod 12, so as to prevent the semicircular steel rings 23 from interfering with the piston rod 12.

[0043] The adjustment lamination 22 of the embodiment of the present application is in a spliced ​​form, and the two halves of the adjustment lamination 22 are connected by bolts. The minimum thickness of each adjustment lamination 22 must meet the load-bearing requirements to ensure that the load will not crush the adjustment lamination 22 when only one adjustment lamination 22 is padded. At the same time, the maximum thickness of the adjustment lamination 22 must be less than the length of the external thread 13 to achieve stepless regulation.

[0044] In some alternative embodiments: See Figure 1 As shown, an embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder, wherein a plurality of circumferentially evenly distributed threaded holes are provided on the outer side wall of the nut 21 of the detachable mechanical self-locking hydraulic cylinder, and each threaded hole is threadedly connected to a handle (not shown in the figure) for driving the nut 21 to rotate on the piston rod 12.

[0045] When the diameter of the cylinder body 10 is large, the outer diameter of the nut 21 threadedly connected to the piston rod 12 is also large, and it is difficult to use operating tools such as wrenches. In the embodiment of the present application, a plurality of circumferentially evenly distributed threaded holes are opened on the outer wall of the nut 21, and a handle is connected to the threaded hole. The operator drives the nut 21 to rotate by manually operating the handle to adjust the nut 21 to a predetermined position.

[0046] In some alternative embodiments: See Figure 1 As shown, an embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder, a piston rod 12 of which is provided with a ball head 14 at one end close to the external thread 13, a mounting plate 15 is rotatably connected to the ball head 14, a ball socket matched with the ball head 14 is provided on the mounting plate 15, and a baffle 16 that limits the ball head 14 in the ball socket.

[0047] The end of the piston rod 12 close to the external thread 13 is the pushing operation end, and the piston rod 12 is connected to the mounting plate 15 by the ball head 14, so that the angle between the mounting plate 15 and the piston rod 12 can be adaptively adjusted. The baffle 16 on the mounting plate 15 is used to limit the ball head 14 in the ball socket to prevent the mounting plate 15 and the ball head 14 from loosening.

[0048] In some alternative embodiments: See Figure 1 As shown, an embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder, the adjustment stack 22 of which is a steel plate structure of a set thickness, and a "U"-shaped slot matching the outer diameter of the piston rod 12 is provided on the adjustment stack 22.

[0049] A slider for opening or closing the slot is slidably connected to the slot of the "U"-shaped slot of the adjustment stack. When the adjustment stack 22 needs to be assembled in front of the piston rod 12, the slider is slid to open the slot of the "U"-shaped slot. When the adjustment stack 22 is assembled behind the piston rod 12, the slider is slid to close the slot of the "U"-shaped slot to prevent the adjustment stack 22 from sliding off the piston rod 12.

[0050] In some alternative embodiments: See Figure 1 As shown, the embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder, the maximum thickness of the adjustment stack 22 of the detachable mechanical self-locking hydraulic cylinder is less than the thread length of the external thread 13. When the spacing between the stacked adjustment stack 22 and the nut 21 is less than the thickness of the single-piece adjustment stack 22, it is convenient for the nut 21 to rotate in the direction of the adjustment stack 22 to press the adjustment stack 22, thereby realizing stepless regulation.

[0051] How it works

[0052] The embodiment of the present application provides a detachable mechanical self-locking hydraulic cylinder. The detachable mechanical self-locking hydraulic cylinder of the present application is provided with a cylinder body 10, which includes a cylinder body 11 and a piston rod 12 at one end of which is located in the cylinder body 11 and is slidably connected to the cylinder body 11, and the end of the piston rod 12 extending outside the cylinder body 11 is provided with an external thread 13; a self-locking mechanism 20, which includes a nut 21 connected to the external thread of the piston rod 12, and a plurality of adjustment laminations 22 are sequentially stacked on the piston rod 12 between the nut 21 and the cylinder body 11, and the adjustment laminations 22 are detachably connected to the piston rod 12.

[0053] Therefore, the detachable mechanical self-locking hydraulic cylinder of the present application is provided with an external thread 13 at one end of the piston rod 12 extending outside the cylinder body 11, and a self-locking mechanism 20 is connected to the piston rod 12, and the self-locking mechanism 20 includes a nut 21 threadedly connected to the piston rod 12, and a plurality of adjustment laminations 22 are sequentially stacked on the piston rod 12 between the nut 21 and the cylinder body 11, and the adjustment laminations 22 are detachably connected to the piston rod 12. The adjustment laminations 22 and the nut 21 are combined with each other to realize mechanical self-locking, and the number of adjustment laminations 22 is added as needed and detachably connected to the piston rod 12, thereby achieving the purpose of reducing the minimum installation distance of the cylinder body 10.

[0054] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0055] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0056] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A detachable mechanical self-locking hydraulic cylinder, characterized in that: include: A cylinder body (10), the cylinder body (10) comprising a cylinder body (11) and a piston rod (12) one end of which is located inside the cylinder body (11) and is slidably connected to the cylinder body (11), and one end of the piston rod (12) extending outside the cylinder body (11) is provided with an external thread (13); A self-locking mechanism (20), the self-locking mechanism (20) comprising a nut (21) connected to the external thread (13) of the piston rod (12), a plurality of adjustment laminations (22) being sequentially stacked on the piston rod (12) between the nut (21) and the cylinder body (11), the adjustment laminations (22) being detachably connected to the piston rod (12).

2. A detachable mechanical self-locking hydraulic cylinder according to claim 1, characterized in that: The thread length of the external thread (13) is greater than the sum of the thickness of the nut (21) and the thickness of the single-piece adjustment lamination (22), so that the nut (21) can move on the piston rod (12) in a direction approaching or moving away from the adjustment lamination (22).

3. A detachable mechanical self-locking hydraulic cylinder according to claim 1, characterized in that: The adjustment lamination (22) comprises two mutually facing semicircular annular steel rings (23), and the two mutually facing semicircular annular steel rings (23) are connected to each other to form a circular ring structure surrounding the piston rod (12).

4. A detachable mechanical self-locking hydraulic cylinder as claimed in claim 3, characterized in that: One ends of the two mutually engaged semicircular ring-shaped steel rings (23) are connected to each other via a hinge, and the other ends are connected to each other via a buckle.

5. A detachable mechanical self-locking hydraulic cylinder as claimed in claim 3, characterized in that: Both ends of the semicircular ring steel ring (23) are provided with connecting plates (24), and bolts are used to penetrate two adjacent connecting plates (24) to fix two mutually matched semicircular ring steel rings (23) together to form a circular ring.

6. A detachable mechanical self-locking hydraulic cylinder according to claim 1, characterized in that: A plurality of threaded holes are provided on the outer wall of the nut (21), and a handle for driving the nut (21) to rotate on the piston rod (12) is threadedly connected to each of the threaded holes.

7. A detachable mechanical self-locking hydraulic cylinder according to claim 1, characterized in that: A ball head (14) is provided at one end of the piston rod (12) close to the external thread (13), and a mounting plate (15) is rotatably connected to the ball head (14). The mounting plate (15) is provided with a ball socket matched with the ball head (14), and a baffle (16) for limiting the ball head (14) in the ball socket.

8. A detachable mechanical self-locking hydraulic cylinder according to claim 1, characterized in that: The adjusting stack (22) is a steel plate structure with a set thickness, and a "U"-shaped slot matching the outer diameter of the piston rod (12) is provided on the adjusting stack (22).

9. A detachable mechanical self-locking hydraulic cylinder as claimed in claim 8, characterized in that: The notch of the "U"-shaped slot of the adjustment lamination (22) is slidably connected to a slider for opening or closing the notch.

10. A detachable mechanical self-locking hydraulic cylinder according to claim 1, characterized in that: The maximum thickness of the adjustment lamination (22) is smaller than the thread length of the external thread (13).

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