Lifting cylinder

Abstract

The lifting air cylinder comprises a cylinder barrel, a piston, a piston rod and a buffering piece, and the cylinder barrel is provided with a front end cover and a rear end cover; the piston is in sliding fit with the cylinder barrel; the piston rod is connected with the piston, the piston is provided with a first rod body located outside the cylinder barrel and a second rod body located inside the cylinder barrel, and the first rod body comprises an external rod located outside the cylinder barrel when stretching out and retracting back; and the buffer piece can be telescopically deformed in the first direction and is arranged on the external rod, so that when the piston rod retracts, the buffer piece is propped against the front end cover to deform. The buffer part is arranged on the part, exposed out of the cylinder barrel, of the piston rod, when the piston rod retracts, the buffer part collides with the front end cover of the cylinder barrel to deform, the buffering and damping effects are achieved, and then the safety of anode bus lifting operation is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrolytic aluminum, and particularly to a lifting cylinder applied to an electrolytic aluminum device. BACKGROUND

[0002] In the electrolytic aluminum industrial production, the anode bus is placed in the electrolytic cell, and as the anode bus is consumed, it will gradually descend in the electrolytic cell, so it is necessary to lift the anode bus. Usually, a lifting cylinder is used to lift the anode bus. The lifting cylinder usually includes a cylinder, a piston and a piston rod. The piston is placed inside the cylinder and is in sliding connection with the cylinder. One end of the piston rod is placed inside the cylinder and is fixedly connected with the piston, and the other end of the piston rod is placed outside the cylinder. The anode bus is lifted by moving the piston rod. However, when the piston rod is retracted, the speed is relatively fast, and the piston rod is easy to collide with the cylinder hard, and the collision force is easy to cause the piston rod to break and the piston rod to fall off from the piston, affecting the lifting operation of the anode bus. CONTENT OF THE UTILITY MODEL

[0003] The embodiment of the present application provides a lifting cylinder which can effectively improve the safety of the anode bus lifting operation.

[0004] The embodiment of the present application provides a lifting cylinder, which comprises:

[0005] a cylinder, the cylinder having a front end cover and a rear end cover arranged oppositely;

[0006] a piston, the piston being arranged inside the cylinder and being in sliding fit with the cylinder;

[0007] a piston rod, the piston rod being connected with the piston, the piston having a first rod body located outside the cylinder and a second rod body located inside the cylinder, the piston rod being capable of extending outward and retracting inward in a first direction relative to the cylinder, the first rod body including an external rod located outside the cylinder during extension and retraction;

[0008] a buffer, the buffer being capable of being deformed in extension and retraction in the first direction, the buffer being arranged on the external rod, so that the buffer is in abutment with the front end cover and is deformed when the piston rod is retracted.

[0009] In some embodiments, the buffer is a sleeve with elasticity, and the sleeve is sleeved on the external rod.

[0010] In some embodiments, the buffer is a sleeve made of PU material.

[0011] In some embodiments, the inner diameter of the sleeve is greater than the diameter of the external rod, the difference between the inner diameter and the diameter is within a preset difference range, and the length of the sleeve is greater than the length of the external rod in the first direction.

[0012] In some embodiments, the sleeve is a bellows.

[0013] In some embodiments, the sleeve has a C-shaped cross section with an opening, the cross section being perpendicular to the first direction. By arranging a C-shaped sleeve, it is convenient to fit the sleeve on the outside of the outer rod.

[0014] In some embodiments, the buffer is a spring, the spring being fitted on the outer rod, the spring having a front end away from the cylinder and a rear end close to the cylinder in the first direction, the front end being connected to the outer rod, and the rear end being a free end.

[0015] In some embodiments, the lifting cylinder further comprises a mounting seat, the mounting seat comprising a fixed plate and a movable plate, the fixed plate being fixed to the outer rod, and the movable plate being fitted on the outer rod and movably connected to the outer rod in the first direction, the front end of the spring being connected to the fixed plate, and the rear end of the spring being connected to the movable plate, so that when the piston rod retracts, the buffer abuts against the front end cover through the movable plate.

[0016] In some embodiments, the lifting cylinder further comprises a locking nut, an end of the outer rod being threadedly connected to the locking nut, and an end of the buffer away from the front end cover abutting against the locking nut.

[0017] In some embodiments, the lifting cylinder further comprises a locking nut and a limiting member, an end of the outer rod being threadedly connected to the locking nut, and the limiting member being fixed to the outer rod, and an end of the buffer away from the front end cover abutting against the limiting member.

[0018] Beneficial effects: by arranging a buffer on the part of the piston rod exposed to the cylinder, when the piston rod retracts, the buffer deforms by colliding with the front end cover of the cylinder, thereby playing a role of buffering and shock absorption, so as to effectively reduce the situation of the piston rod breaking and falling off the piston, ensure the service life of the piston rod, and further improve the safety of the lifting anode busbar operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 Fig. 1 is a perspective view of the lifting cylinder according to an embodiment of the present application;

[0021] Figure 2 Fig. 1 is a sectional view of a lifting cylinder according to a first embodiment of the present application;

[0022] Figure 3 Fig. 2 is a sectional view of a lifting cylinder according to a second embodiment of the present application;

[0023] Figure 4 Fig. 3 is a sectional view of a lifting cylinder according to a third embodiment of the present application;

[0024] Figure 5 Fig. 4 is a sectional view of a lifting cylinder according to a fourth embodiment of the present application.

[0025] Reference signs: 100, lifting cylinder; 1, cylinder barrel; 11, front end cover; 12, rear end cover; 2, piston; 3, piston rod; 31, first rod body; 32, second rod body; 33, external rod; 4, buffer; 41, front end; 42, rear end; 5, locking nut; 6, mounting seat; 61, fixed plate; 62, movable plate; X, first direction; Z, central axis. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be 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 the present application and not intended to limit the present application.

[0027] As Figures 1 to 5As shown, the lifting cylinder 100 according to the embodiments of the present application can be used to lift the anode bus, which comprises a cylinder barrel 1, a piston 2, a piston rod 3 and a buffer 4. The cylinder barrel 1 has a certain volume, and has a front end cover 11 and a rear end cover 12 oppositely arranged in a first direction X. The piston 2 is located inside the cylinder barrel 1 and can be slidingly fitted with the inner wall of the cylinder barrel 1, so that the piston 2 can move linearly back and forth between the front end cover 11 and the rear end cover 12. The piston rod 3 is connected with the piston 2 and can be driven by the piston 2 to extend outward and retract inward in the first direction X. The first direction X is the length direction of the piston rod 3 and also the extension direction of the central axis Z of the piston rod 3. The part of the piston rod 3 located outside the cylinder barrel 1 is a first rod body 31, and the part of the piston rod 3 located inside the cylinder barrel 1 is a second rod body 32, which is fixedly connected with the piston 2. During the movement of the piston 2, the length of the first rod body 31 and the length of the second rod body 32 change in real time. A section of the first rod body 31 away from the front end cover 11 of the cylinder barrel 1 is an external rod 33, which is located outside the cylinder barrel 1 during the extension and retraction of the piston rod 3, i.e., the external rod 33 is the exposed part of the piston rod 3. The buffer 4 has elasticity and can be deformed in the first direction X. The buffer 4 is arranged on the external rod 33, and when the piston rod 3 retracts inward, the end of the buffer 4 close to the front end cover 11 can abut against the front end cover 11 of the cylinder barrel 1, so that the buffer 4 is deformed.

[0028] The buffer 4 has a front end 41 away from the front end cover 11 of the cylinder barrel 1 and a rear end 42 close to the front end cover 11 of the cylinder barrel 1 in the first direction X. The front end 41 and the rear end 42 are oppositely arranged, the front end 41 can be connected with the external rod 33 of the piston rod 3, and the rear end 42 can be a free end. When the piston rod 3 extends outward, the buffer 4 can move outward together with the piston rod 3. When the piston rod 3 retracts inward, the buffer 4 can move inward together with the piston rod 3, and at the end of the retraction stroke, the rear end 42 of the buffer 4 collides with the front end cover 11 of the cylinder barrel 1, which collides before the piston rod 3 and the rear end cover 12 of the cylinder barrel 1 collide. Since the buffer 4 has elasticity and can be elastically deformed when subjected to the impact force, it can absorb the energy generated by the collision, play a role of buffering and shock absorption, buffer the hard collision between the piston rod 3 and the rear end cover 12 of the cylinder barrel 1, reduce or avoid the situation that the piston rod 3 is broken or the piston rod 3 is loose from the piston 2 due to the collision, ensure the service life of the piston rod 3, and ensure the efficiency and safety of the lifting anode bus operation. At the same time, by arranging the buffer on the part of the piston rod exposed to the cylinder barrel, the buffer effect can be achieved while the modification of the cylinder structure is minimized.

[0029] In some embodiments, as Figure 1As shown, the buffer 4 is an elastic sleeve, which is sleeved outside the outer rod 33, and the inner diameter of the buffer 4 can be slightly larger than the diameter of the outer rod 33. The difference between the inner diameter of the buffer 4 and the diameter of the outer rod 33 is within a preset difference range, within which the buffer 4 can be sleeved on the outer rod 33 and is not easy to move axially forward and backward along the outer rod 33 and move radially up and down along the outer rod 33. In the first direction X, the length of the buffer 4 can be slightly longer than the length of the outer rod 33, so that the buffer 4 can be compressed and deformed during the retraction of the piston rod 3, thereby playing a role of shock absorption and buffering. The material of the sleeve can be PU (polyurethane), rubber, silicone, etc. Generally, the sleeve can be made of PU material. The sleeve can be C-shaped with openings on the sides, thereby facilitating the overall sleeve installation on the outer rod.

[0030] The end of the piston rod 3 away from the cylinder barrel 1, i.e. the end of the outer rod 33 away from the cylinder barrel 1, can have a threaded segment that is threadedly connected and fixed with the locking nut 5. The front end 41 of the buffer 4 can abut against the locking nut 5, and the rear end 42 of the buffer 4 can be a free end. When the piston rod 3 retracts, the rear end 42 of the buffer 4 collides with the front end cover 11 of the cylinder barrel 1, and under the limiting action of the locking nut 5 on the front end 41 of the buffer 4, the buffer 4 is compressed and deformed, thereby playing a role of shock absorption and buffering.

[0031] In this embodiment, the buffer 4 is an elastic sleeve, which can be a corrugated tube with better elasticity. In a natural state, the length of the sleeve can be slightly longer than the length of the outer rod 33.

[0032] In this embodiment, the elastic sleeve is sleeved outside the outer rod 33 by the friction force between the sleeve and the outer rod 33, and the front end 41 and the rear end 42 of the sleeve can be both connected with the outer rod 33, i.e. the sleeve is sleeved on the outer rod 33.

[0033] In some embodiments, as shown, Figure 4 the buffer 4 is an elastic spring, which is sleeved outside the outer rod 33, and the inner diameter of the buffer 4 can be greater than the diameter of the outer rod 33. The length of the buffer 4 in the first direction X can be slightly greater than the length of the outer rod 33, the front end 41 of the buffer 4 close to the locking nut 5 can be connected with the outer rod 33, and the rear end 42 of the buffer 4 away from the locking nut 5 can be a free end, i.e. the buffer 4 is suspended on the outer rod 33 in the first direction X. When the piston rod 3 retracts, the rear end 42 of the buffer 4 collides with the front end cover 11 of the cylinder barrel 1, and the buffer 4 is compressed and deformed, thereby playing a role of shock absorption and buffering.

[0034] In some embodiments, the buffer 4 is an elastic spring. Two springs are symmetrically arranged about the central axis Z of the piston rod 33. Both springs are located outside the outer rod 33. The front ends 41 of both springs can be connected to the outer rod 33, and the rear ends 42 of both springs can be free ends. When the piston rod 3 retracts, the rear ends 42 of both springs collide with the front end cover 11 of the cylinder 1, causing the springs to compress and deform.

[0035] In some embodiments, such as Figure 5 As shown, the lifting cylinder 100 also includes a mounting base 6, which includes a fixed plate 61 and a movable plate 62. An installation space 63 is formed between the fixed plate 61 and the movable plate 62, and the buffer 4 is disposed within the installation space 63. The fixed plate 61 is fixedly connected to the external rod 33, and the movable plate 62 is movably connected to the external rod 33, allowing the movable plate 62 to move back and forth relative to the fixed plate 61 and the external rod 33 in the first direction X. The external rod 33 can be fitted onto both the fixed plate 61 and the movable plate 62. When the piston rod 3 retracts, the movable plate 62 collides with the front end cover 11 of the cylinder 1, causing the spring to compress and deform. In some alternative structures, a limiting member can also be fixed to the external rod 33. This limiting member can be connected to the front end 41 of the buffer 4, thereby allowing the buffer 4 to be installed on the external rod 33.

[0036] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lifting cylinder, characterized in that, include: A cylinder barrel having a front end cap and a rear end cap disposed opposite to each other; A piston, wherein the piston is disposed inside the cylinder and slides in cooperation with the cylinder; A piston rod connected to the piston, the piston having a first rod body located outside the cylinder and a second rod body located inside the cylinder, the piston rod being capable of extending outward and retracting inward relative to the cylinder in a first direction, the first rod body including an external rod located outside the cylinder when both extending and retracting; A buffer member is provided, which is capable of telescopic deformation in the first direction. The buffer member is disposed on the external rod so that when the piston rod retracts, the buffer member abuts against the front end cover and deforms.

2. The lifting cylinder according to claim 1, characterized in that, The buffer is an elastic sleeve that covers the external rod.

3. The lifting cylinder according to claim 2, characterized in that, The buffer component is a sleeve made of PU material.

4. The lifting cylinder according to claim 2, characterized in that, The inner diameter of the sleeve is greater than the diameter of the outer rod, and the difference between the inner diameter and the diameter is within a preset difference range. In the first direction, the length of the sleeve is greater than the length of the outer rod.

5. The lifting cylinder according to claim 2, characterized in that, The sleeve is a corrugated pipe.

6. The lifting cylinder according to claim 2, characterized in that, The sleeve has a C-shaped cross-section with an opening, and the cross-section is perpendicular to the first direction.

7. The lifting cylinder according to claim 1, characterized in that, The buffer is a spring, which is sleeved on the external rod. In the first direction, the spring has a front end away from the cylinder and a rear end close to the cylinder. The front end is connected to the external rod, and the rear end is a free end.

8. The lifting cylinder according to claim 7, characterized in that, The lifting cylinder also includes a mounting base, which includes a fixed plate and a movable plate. The fixed plate is fixed to the external rod, and the movable plate is sleeved on the external rod and forms a movable connection with the external rod in the first direction. The front end of the spring is connected to the fixed plate, and the rear end of the spring is connected to the movable plate, so that when the piston rod retracts, the buffer abuts against the front end cover through the movable plate.

9. The lifting cylinder according to claim 1, characterized in that, The lifting cylinder also includes a locking nut, the end of the external rod is threadedly connected and fixed to the locking nut, and the end of the buffer member away from the front end cover abuts against the locking nut.

10. The lifting cylinder according to claim 1, characterized in that, The lifting cylinder also includes a locking nut and a limiting member. The end of the external rod is threadedly connected and fixed to the locking nut. The limiting member is fixed to the external rod. The end of the buffer member away from the front end cover abuts against the limiting member.

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