Hydraulic cylinder lifting and locking mechanism

Abstract

The utility model discloses a hydraulic cylinder lifting and locking mechanism, and belongs to the technical field of hydraulic cylinder application. The hydraulic cylinder lifting and locking mechanism comprises a hydraulic cylinder, an upper supporting rack frame, a lower supporting rack frame and an air cylinder, an upper supporting rack is vertically connected in the upper supporting rack frame, a lower supporting rack is vertically connected in the lower supporting rack frame, and the upper supporting rack and the lower supporting rack are connected in a meshed mode; the top of the upper supporting rack frame is hinged to the top of a piston rod of the hydraulic cylinder, the air cylinder is connected to the lower portion of the upper supporting rack frame, and a telescopic rod of the air cylinder abuts against the outer wall of a cylinder body of the hydraulic cylinder. The lower part of the lower support rack frame is connected to the bottom of the cylinder body; during lifting adjustment of the piston rod of the hydraulic cylinder, the upper supporting rack and the lower supporting rack are separated from meshing firstly and then meshed and locked through the air cylinder, and the piston rod is lifted, supported and positioned. The technical problem that the locking effect is poor when a hydraulic cylinder piston rod is supported and positioned in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder application technical field more specifically, it is a kind of hydraulic cylinder lifting locking mechanism. BACKGROUND

[0002] Hydraulic cylinder is a kind of hydraulic energy conversion into mechanical energy, do linear reciprocating motion (or swing motion) hydraulic actuator, it simple structure, work reliable, with it to realize reciprocating motion, can dispense with speed reducer, and there is no transmission gap, movement smooth, therefore widely used in various mechanical equipment.

[0003] Hydraulic cylinder is also widely used in lifting equipment, in the use process of this kind of equipment, it usually needs its long time stable support to outside, at this time hydraulic cylinder piston rod needs to bear external load and does not produce any displacement.The existing hydraulic cylinder mainly supports and positions piston rod by the thrust of the hydraulic oil of cylinder body, locking mode is single, when hydraulic cylinder internal oil pressure is unstable, piston rod is prone to displacement, locking effect is poor, lifting equipment has security risk. UTILITY MODEL CONTENTS

[0004] 1, the technical problem to be solved by the utility model

[0005] In view of the poor locking effect of the piston rod of the hydraulic cylinder in the prior art when supporting and positioning, the utility model provides a hydraulic cylinder lifting locking mechanism, which supports and positions the piston rod by the meshing locking support of the two tooth bars after the cooperation of the air cylinder, upper support tooth bar and lower support tooth bar, so as to achieve the purpose of improving the locking effect.

[0006] 2, technical scheme

[0007] To achieve the above purpose, the utility model provides a technical scheme as follows:

[0008] A kind of hydraulic cylinder lifting locking mechanism, including hydraulic cylinder, upper support tooth bar frame, lower support tooth bar frame and air cylinder, wherein: upper support tooth bar frame is connected with upper support tooth bar in vertical direction, lower support tooth bar frame is connected with lower support tooth bar in vertical direction, and upper support tooth bar and lower support tooth bar are engagedly connected;The top of upper support tooth bar frame is hinged to the top of the piston rod of hydraulic cylinder, the air cylinder is connected to the lower part of upper support tooth bar frame, and the telescopic rod of air cylinder is tightly arranged on the outer wall of the cylinder body of hydraulic cylinder;The upper part of lower support tooth bar frame is connected to the top of cylinder body, and the lower part is connected to the bottom of cylinder body;When the piston rod of hydraulic cylinder is adjusted, the upper support tooth bar and the lower support tooth bar are first disengaged from engagement and then engaged and locked by air cylinder, so that the piston rod is positioned by being supported and lifted.

[0009] Further technical scheme, upper support tooth bar and lower support tooth bar are both two symmetrical tooth bars on the two sides of cylinder body, to improve the symmetrical stability of engagement and locking.

[0010] Further technical solutions, the lower part of the lower support rack frame is hinged with the bottom of the cylinder through a pin shaft, facilitating assembly on the lifting device.

[0011] Further technical solutions, the bottom of the upper support rack frame is a convex bracket, and the air cylinder is connected to the convex bracket, and the telescopic rod of the air cylinder is tightly pressed against the outer wall of the cylinder after passing through the convex bracket, so that the stroke of the telescopic rod is improved.

[0012] Further technical solutions, the top end of the cylinder extends to the side to form an ear plate, and the upper part of the lower support rack frame is connected to the lower surface of the ear plate, facilitating assembly of the lower support rack frame.

[0013] 3、Beneficial effects

[0014] Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

[0015] The hydraulic cylinder lifting locking mechanism can effectively improve the safety of the lifting device with the hydraulic cylinder as an execution element, and prevent displacement of the hydraulic cylinder piston rod caused by unstable oil pressure in the hydraulic cylinder itself, thereby preventing safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the hydraulic cylinder lifting locking mechanism of the specific embodiment;

[0017] Figure 2 is Figure 1 a side view schematic view;

[0018] Figure 3 is a structural schematic view of the hydraulic cylinder of the specific embodiment;

[0019] Figure 4 is a schematic view of the hydraulic cylinder of the specific embodiment assembled on the lifting device;

[0020] Figure 5 is a schematic view of the locking process of the hydraulic cylinder lifting locking mechanism of the specific embodiment.

[0021] In the figure: 1, hydraulic cylinder; 2, upper support rack frame; 3, lower support rack frame; 4, air cylinder; 5, upper pin shaft; 6, lower pin shaft; 10, lifting device; 11, piston rod; 12, cylinder; 13, ear plate; 21, upper support rack; 22, convex bracket; 31, lower support rack. DETAILED DESCRIPTION

[0022] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings.

[0023] Embodiment 1

[0024] The hydraulic cylinder lifting locking mechanism of the embodiment, as shown in Figure 1 , 2 , 3, 5, comprises a hydraulic cylinder 1, an upper support rack frame 2, a lower support rack frame 3 and a cylinder 4, wherein: the upper support rack frame 2 is vertically connected with an upper support rack 21, the lower support rack frame 3 is vertically connected with a lower support rack 31, and the upper support rack 21 and the lower support rack 31 are adaptively engaged; the top of the upper support rack frame 2 is hinged to the top of the piston rod 11 of the hydraulic cylinder 1 through an upper pin shaft 5, the cylinder 4 is connected to the lower part of the upper support rack frame 2, and the telescopic rod of the cylinder 4 is tightly pressed against the outer wall of the cylinder body 12 of the hydraulic cylinder 1; the upper part of the lower support rack frame 3 is connected to the top of the cylinder body 12, and the lower part is connected to the bottom of the cylinder body 12.

[0025] The hydraulic cylinder lifting locking mechanism of the embodiment, in specific use, when the piston rod 11 of the hydraulic cylinder 1 is adjusted to ascend or descend, the upper support rack 21 and the lower support rack 31 are first disengaged and then engaged and locked by the cylinder 4, so as to support and position the piston rod 11 to ascend or descend.

[0026] Embodiment 2

[0027] The hydraulic cylinder lifting locking mechanism of the embodiment, the basic structure of which is the same as that of embodiment 1, is different from or improved in that: as shown in Figure 1 , 2 , 3, 4, 5, the upper support rack 21 and the lower support rack 31 are both symmetrically arranged on both sides of the cylinder body 12, so as to improve the symmetric stability of the engagement and locking. The lower part of the lower support rack frame 3 is hinged to the bottom of the cylinder body 12 through a lower pin shaft 6, so as to facilitate the assembly on the lifting device 10. The bottom of the upper support rack frame 2 is a convex bracket 22, the cylinder 4 is connected to the convex bracket 22, and the telescopic rod of the cylinder 4 is tightly pressed against the outer wall of the cylinder body 12 after passing through the convex bracket 22, so as to improve the stroke of the telescopic rod. The top of the cylinder body 12 extends out an ear plate 13 to the side, and the upper part of the lower support rack frame 3 is connected to the lower surface of the ear plate 13, so as to facilitate the assembly of the lower support rack frame 3 outside the cylinder body 12.

[0028] The hydraulic cylinder lifting locking mechanism of the embodiment is assembled on the scissor-type lifting device 10 as shown in Figure 4 , and the application principle is as follows:

[0029] As shown in the schematic diagram ① in Figure 5 , at this time, the hydraulic cylinder 1 and the cylinder 4 are in the initial state, and the upper and lower support rack frames are also engaged with each other. When the lifting device 10 needs to run lifting, at this time, the telescopic rod of the cylinder 4 is elongated and tightly pressed against the cylinder body 12 of the hydraulic cylinder 1, and at the same time, the upper support rack frame 2 rotates around the upper pin shaft 5 under the action of the cylinder 4, as shown in Figure 5as shown in the schematic diagram 2 in the figure, the upper and lower support rack frames are slowly disengaged. Then the hydraulic cylinder 1 piston rod 11 starts to extend, the lifting device 10 will slowly rise, when reaching the required lifting position, such as Figure 5 as shown in the schematic diagram 3 in the figure, the hydraulic cylinder 1 stops moving. Finally the cylinder 4 telescopic rod starts to contract, the upper support rack frame 2 starts to move around the upper pin shaft 5, slowly approaching the lower support rack frame 3, as shown in the schematic diagram 4 in the figure Figure 5 as shown in the schematic diagram 4 in the figure, finally the two racks are engaged with each other, realizing the locking action of the lifting device 10.

[0030] The above description of the utility model and its embodiments is schematic and has no limitation. The embodiments shown in the drawings are only one of the embodiments of the utility model, and the actual structure and manufacturing steps are not limited to this. Therefore, if a person skilled in the art is inspired by this, without departing from the purpose of the invention, similar structure and embodiments can be designed without creativity, which should belong to the protection scope of the utility model.

Claims

1. A hydraulic cylinder lift locking mechanism comprising a hydraulic cylinder (1), characterized by: It also includes upper support rack frame (2), lower support rack frame (3) and cylinder (4), wherein: The upper support rack frame (2) is vertically connected with upper support rack (21), the lower support rack frame (3) is vertically connected with lower support rack (31), and the upper support rack (21) and the lower support rack (31) are engagedly connected; The top of the upper support rack frame (2) is hingedly connected with the top of the piston rod (11) of the hydraulic cylinder (1), the cylinder (4) is connected to the lower part of the upper support rack frame (2), and the telescopic rod of the cylinder (4) is tightly pressed against the outer wall of the cylinder body (12) of the hydraulic cylinder (1); The upper part of the lower support rack frame (3) is connected to the top of the cylinder body (12), and the lower part is connected to the bottom of the cylinder body (12).

2. The hydraulic cylinder lift locking mechanism of claim 1, wherein: The upper support rack (21) and the lower support rack (31) are both symmetrical on both sides of the cylinder body (12).

3. The hydraulic cylinder lift lock mechanism of claim 1, wherein: The lower part of the lower support rack frame (3) is hingedly connected with the bottom of the cylinder body (12) through a pin shaft.

4. The hydraulic cylinder lift lock mechanism of claim 1, wherein: The bottom of the upper support rack frame (2) is a convex bracket (22), the cylinder (4) is connected to the convex bracket (22), and the telescopic rod of the cylinder (4) is tightly pressed against the outer wall of the cylinder body (12) after passing through the convex bracket (22).

5. The hydraulic cylinder lift lock mechanism according to any one of claims 1 to 4, characterized in that: The top of the cylinder body (12) extends out an ear plate (13) to the side, and the upper part of the lower support rack frame (3) is connected to the lower surface of the ear plate (13). The top of the cylinder body (12) extends out an ear plate (13) to the side, and the upper part of the lower support rack frame (3) is connected to the lower surface of the ear plate (13).

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