Anti-collision safety type hydraulic oil cylinder

Abstract

The utility model discloses an anti-collision safety type hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinders, and comprises a cylinder body, an inner sheath is fixedly arranged outside the cylinder body, a piston rod for telescopic movement is arranged on the cylinder body, one rod end of the piston rod is exposed outside the cylinder body, an outer sheath for enclosing the piston rod is fixedly arranged at one rod end of the piston rod, and the outer sheath is attached to the periphery of the inner sheath. The outer sheath is movably driven by the piston rod to move outside the inner sheath; the utility model has the advantages that the outer sheath is sleeved on the outer side of the inner sheath, and the outer sheath is connected to the piston rod, so that when the piston rod moves, the position of the outer sheath is synchronously changed, the extended piston rod is also covered, and the outer sheath is attached to the periphery of the inner sheath to provide support; protection is provided when the extended piston rod is subjected to external collision force, the protection comprehensiveness is improved, and the arranged guide assembly is used for providing a supporting part when the outer sheath is attached to the outer side of the inner sheath to move, and the effect of enhancing the guide stability of the inner sheath can be provided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, and more specifically to an anti-collision safety type hydraulic oil cylinder. Background Art

[0002] A hydraulic cylinder (hydraulic oil cylinder) is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). When it is used to achieve reciprocating motion, a deceleration device can be eliminated, and there is no transmission annular gap, and the motion is smooth, so it is widely used in the hydraulic systems of various machines.

[0003] 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;

[0004] The existing hydraulic cylinder (such as application number: CN202020053420.7, a hydraulic cylinder protection device) uses a "protective box and a protective cover" to wrap and cover the "hydraulic cylinder", but the output shaft (i.e., the piston rod) of the "hydraulic cylinder" needs to be telescopic and movable. When it is exposed for use, the "protective box and the protective cover" cannot wrap and cover the output shaft for protection, and has the disadvantages of low comprehensiveness of protection and poor protection. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-collision safety hydraulic cylinder in order to solve the above technical problems.

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] The utility model proposes an anti-collision safety hydraulic oil cylinder, comprising a cylinder body, an inner sleeve fixedly arranged outside the cylinder body, a piston rod for telescopic movement is arranged on the cylinder body and one rod end thereof is exposed outside the cylinder body, an outer sleeve for surrounding the one rod end of the piston rod is fixedly arranged, the outer sleeve is fitted to the periphery of the inner sleeve, and the outer sleeve is driven by the movement of the piston rod to move outside the inner sleeve.

[0008] As a preferred technical solution of the utility model, the outer sheath is provided with a guide component for enhancing stability between the outer sheath and the inner sheath.

[0009] As an optimal technical solution of the utility model, the guide assembly includes a strip guide groove arranged on the inner sleeve, the inner wall of the strip guide groove is fitted with a soft wear-resistant layer, a universal ball is arranged in the strip guide groove and is movable in fit with the soft wear-resistant layer, and the universal ball is fixed on the outer sleeve.

[0010] As a preferred technical solution of the utility model, the cylinder body is provided with an oil hole for connecting the oil pipe, and the inner and outer sheaths are provided with passages for the oil pipe to pass through the inner sheath and move outside the outer sheath.

[0011] As a preferred technical solution of the utility model, the inner sheath and the outer sheath are respectively provided with a plurality of groups of through holes, and the inside of the inner sheath is connected with the outside of the outer sheath through the through holes.

[0012] As a preferred technical solution of the utility model, the plurality of groups of through holes are evenly distributed on the inner sheath and the outer sheath respectively.

[0013] The beneficial effects of the utility model are as follows:

[0014] By putting the outer sheath 4 on the outer side of the inner sheath 2, and the outer sheath 4 is connected to the piston rod 3, when the piston rod 3 moves, the outer sheath 4 also changes its position synchronously to cover the extended piston rod 3, and the outer sheath 4 fits on the outer periphery of the inner sheath 2 to provide support, and provides protection when the extended piston rod 3 is subjected to external impact force, thereby increasing the comprehensiveness of protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0017] Figure numerals: cylinder body -1, inner sleeve -2, piston rod -3, outer sleeve -4, guide assembly -5, oil hole -6, outlet -7, through hole -8, strip guide groove -51, universal ball -52. DETAILED DESCRIPTION

[0018] Embodiment 1:

[0019] like Figures 1-2 As shown, this embodiment proposes: an anti-collision safety hydraulic oil cylinder, comprising a cylinder body 1 (cylinder body 1 is a hydraulic cylinder body);

[0020] An inner jacket 2 is fixedly arranged outside the cylinder body 1 (as shown in the figure, a fixed reinforcing jacket is arranged around the outer side of the cylinder body 1 to improve the anti-support strength, and the inner jacket 2 is tubular);

[0021] The cylinder body 1 is provided with a piston rod 3 for telescopic movement, and one end of the piston rod 3 is exposed outside the cylinder body 1 (the piston rod 3 is a part of the cylinder body 1, as shown in the figure, the piston rod 3 is centrally arranged at the top end of the cylinder body 1 and moves up and down);

[0022] The piston rod 3 is provided with an outer sheath 4 (such as Figure 2As shown, an outer sheath 4 is arranged at the top of the piston rod 3, and the outer sheath 4 covers the piston rod 3 downwards, and a part of the top of the piston rod 3 in the figure passes through the outer sheath 4; the outer sheath 4 is tubular, but the upper tube opening is sealed by a similar closing plate);

[0023] The outer sheath 4 is attached to the outer periphery of the inner sheath 2, and the outer sheath 4 is driven by the piston rod 3 to move outside the inner sheath 2 (such as Figure 2 As shown, the outer sheath 4 is sleeved on the outer periphery of the inner sheath 2. When the piston rod 3 moves up and down, the outer sheath 4 also moves up and down to cover the piston rod 3 to provide protection (the movement of the outer sheath 4 will not separate from the fit with the inner sheath 2) and (it can provide a dustproof function).

[0024] The cylinder body 1 is provided with an oil hole 6 for connecting the oil pipe (as shown in the figure), and the inner sheath 2 and the outer sheath 4 are provided with a passage 7 for the oil pipe to pass through the inner sheath 2 and move outside the outer sheath 4 (as shown in the figure). Figure 2 As shown, the opening 7 is set as a preset space. When the oil pipe connected to the oil hole 6 is set, it passes through here. When the outer sheath 4 moves up and down, the opening 7 provides a fixed oil pipe position for movement).

[0025] The inner sheath 2 and the outer sheath 4 are respectively provided with a plurality of groups of through holes 8, and the inner sheath 2 is connected to the outer sheath 4 through the through holes 8 (such as Figures 1-2 As shown, a ventilation effect is provided between the cylinder body 1 and the outside of the outer jacket 4, providing a heat dissipation effect).

[0026] The plurality of groups of through holes 8 are evenly distributed on the inner sheath 2 and the outer sheath 4 respectively (according to the above, the positions of the plurality of groups of through holes 8 are reasonably set to make the ventilation effect uniform and ensure good heat dissipation uniformity).

[0027] Embodiment 2:

[0028] like Figures 1-2 As shown, the difference from Example 1 is that: it also includes a guide component 5 for enhancing stability between the outer sheath 4 and the inner sheath 2, which provides a support component when the outer sheath 4 fits and moves on the outside of the inner sheath 2 and provides the effect of enhancing stability.

[0029] In order to implement the above-mentioned guide assembly 5, it is proposed that Figure 2 As shown, the specific structure and composition of the guide assembly 5 can be as follows: the guide assembly 5 includes a strip guide groove 51 (such as Figure 2 shown);

[0030] A soft wear-resistant layer (the soft wear-resistant layer can be made of rubber or other materials) is fixedly provided on the inner wall of the strip-shaped guide groove 51;

[0031] A universal ball 52 is arranged in the strip guide groove 51 and moves in contact with the soft wear-resistant layer (the universal ball 52 can provide a pressing and fitting effect on the soft wear-resistant layer of the strip guide groove 51 to increase stability), and the universal ball 52 is fixed on the outer sheath 4;

[0032] At the same time, the limiting effect of the universal ball 52 in the strip guide groove 51 can provide guiding stability for the movement of the outer sheath 4, and can also improve the stability of the movement of the piston rod 3 and the protection of the guiding movement.

[0033] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A collision-proof safety hydraulic cylinder, comprising a cylinder body (1), an inner sheath (2) fixedly arranged outside the cylinder body (1), a piston rod (3) for telescopic movement arranged on the cylinder body (1) and one end of the piston rod exposed outside the cylinder body (1), characterized in that: An outer sheath (4) is fixedly provided at one rod end of the piston rod (3) to protect it. The outer sheath (4) is fitted to the outer periphery of the inner sheath (2). The outer sheath (4) is driven by the movement of the piston rod (3) to move outside the inner sheath (2).

2. The anti-collision safety hydraulic cylinder according to claim 1, characterized in that: The outer sheath (4) is provided with a guide component (5) for enhancing stability when moving with the inner sheath (2).

3. The anti-collision safety hydraulic cylinder according to claim 2, characterized in that: The guide assembly (5) comprises a strip guide groove (51) arranged on the inner sleeve (2), the inner wall of the strip guide groove (51) being fixedly provided with a soft wear-resistant layer, a universal ball (52) being provided in the strip guide groove (51) and being movable in contact with the soft wear-resistant layer, and the universal ball (52) being fixedly mounted on the outer sleeve (4).

4. The anti-collision safety hydraulic cylinder according to claim 1, characterized in that: The cylinder body (1) is provided with an oil hole (6) for connecting an oil pipe, and the inner sleeve (2) and the outer sleeve (4) are provided with a passage (7) for the oil pipe to pass through the inner sleeve (2) and move outside the outer sleeve (4).

5. The anti-collision safety hydraulic cylinder according to claim 1, characterized in that: The inner sheath (2) and the outer sheath (4) are respectively provided with a plurality of groups of through holes (8), and the inside of the inner sheath (2) is communicated with the outside of the outer sheath (4) through the through holes (8).

6. The anti-collision safety hydraulic cylinder according to claim 5, characterized in that: A plurality of groups of through holes (8) are evenly distributed on the inner sheath (2) and the outer sheath (4).

Images