Hydraulic jack

Abstract

The utility model discloses a hydraulic jack which comprises a base (1), an oil tank (2), an oil cylinder (3), a gland (4), a plunger (5), a manual pump (7) and a manual pump oil inlet pipe (8), an oil pipe (6) connected with the manual pump oil inlet pipe (8) is arranged at the bottom end of the oil tank (2), a heavy object (9) is arranged at the top of the oil pipe (6), the oil pipe (6) surrounds the oil cylinder (3), and no matter how the hydraulic jack is placed in the lateral direction, hydraulic oil can be sucked through the oil pipe (6); compared with the prior art, the vertical use is not influenced, the problem that the oil suction pipe cannot suck hydraulic oil and cannot be used even if one side of the large oil cylinder faces downwards and one side of the manual pump faces upwards during lateral use is solved, and the use is more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic tools, and in particular relates to a hydraulic jack. Background Technology

[0002] Hydraulic jacks are a common tool in the repair industry, bringing great convenience to repairmen. The working principle of a hydraulic jack is as follows: When the lever handle of the manual pump is lifted, the small piston moves upward, and the hydraulic oil in the large cylinder pushes open the suction check valve (at this time, the discharge check valve is closed) and enters the manual pump. When the lever handle of the manual pump is pressed down, the small piston moves downward, and the oil in the manual pump is squeezed out, pushing open the discharge check valve (at this time, the suction check valve is automatically closed), and the oil enters the hydraulic cylinder (oil chamber) through the oil pipe. Since the hydraulic cylinder (oil chamber) is also a sealed working volume, the force generated by the compression of the entering oil will push the large piston upward and lift the heavy object to do work. Repeatedly lifting and pressing the lever handle can continuously raise a heavy object, achieving the purpose of lifting. However, currently used hydraulic jacks are more suitable for upright use. When sideways use is required, some problems arise. For example, in sideways use, the manual pump side must face down and the large hydraulic cylinder side up. If the large hydraulic cylinder side faces down and the manual pump side faces up, to prevent the large piston of the hydraulic jack from stopping at its highest point, a pressure relief hole is located at the top of the large hydraulic cylinder. The hydraulic oil level in the large hydraulic cylinder will never exceed the height of the pressure relief hole, so the hydraulic oil in the tank will not be very high, usually just near the filler port. Because the hydraulic oil in the tank is not full, the upper part of the tank is empty when placed sideways, easily causing the suction pipe to not draw hydraulic oil, rendering it unusable. Furthermore, if the manual pump side faces down and the large hydraulic cylinder side faces up, the hydraulic jack will be unstable, posing certain safety hazards and causing inconvenience to repair workers. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a hydraulic jack that does not affect its upright use. When used on the side, even if the side of the large oil cylinder is facing down and the side of the manual pump is facing up, it will not cause the oil suction pipe to fail to draw hydraulic oil and thus become unusable, making it more convenient to use.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: it includes a base, an oil tank, an oil cylinder, a pressure cap, a plunger, a manual pump, and a manual pump inlet pipe. The feature is that an oil pipe connected to the manual pump inlet pipe is provided at the bottom of the oil tank. The oil pipe is a flexible hose, and a weight is provided at the top of the oil pipe.

[0005] As a further improvement, the oil pipe surrounds the oil cylinder.

[0006] This invention features an oil pipe at the bottom of the oil tank that connects to the manual pump's inlet pipe. A weight is placed on top of the oil pipe, which surrounds the oil cylinder. Regardless of the hydraulic jack's side orientation, hydraulic oil can be drawn through the oil pipe. Compared to existing technologies, this invention not only does not affect upright use, but also ensures that even when used sideways with the large oil cylinder facing down and the manual pump facing up, the suction pipe will not fail to draw hydraulic oil, thus preventing the jack from becoming unusable. This makes it much more convenient to use. Attached Figure Description

[0007] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0008] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0009] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0010] In the diagram: 1 is the base, 2 is the oil tank, 3 is the oil cylinder, 4 is the pressure cap, 5 is the plunger, 6 is the oil pipe, 7 is the manual pump, 8 is the manual pump inlet pipe, and 9 is the weight. Detailed Implementation

[0011] Example 1: Refer to Figure 1 , Figure 1 The diagram below shows the structure of Embodiment 1 of this utility model. The hydraulic jack includes a base 1, an oil tank 2, an oil cylinder 3, a pressure cap 4, a plunger 5, a manual pump 7, and a manual pump inlet pipe 8. At the bottom of the oil tank 2, there is an oil pipe 6 connected to the manual pump inlet pipe 8. The oil pipe 6 is a flexible hose. A weight 9 is placed on the oil pipe 6. During use, no matter how the hydraulic jack is placed on its side, the end of the oil pipe 6 always falls to the lower position under the action of the weight 9. This not only does not affect the use when it is upright, but also ensures that the oil pipe 7 can draw hydraulic oil when used on its side, even if the side of the large oil cylinder is facing down and the side of the manual pump is facing up. This prevents the oil pipe from not drawing hydraulic oil, making it very convenient to use.

[0012] Example 2: Refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention. Compared with Embodiment 1, the difference between Embodiment 2 and Embodiment 1 is that the oil pipe 6 in Embodiment 2 is longer and surrounds the oil cylinder 3, which can better ensure that the oil pipe 6 can draw hydraulic oil and the effect is better.

Claims

1. A hydraulic jack, comprising a base (1), an oil tank (2), an oil cylinder (3), a pressure cap (4), a plunger (5), a manual pump (7), and a manual pump inlet pipe (8), characterized in that: At the bottom of the oil tank (2), there is an oil pipe (6) that connects to the manual pump inlet pipe (8). The oil pipe (6) is a flexible hose, and a weight (9) is placed on the top of the oil pipe (6).

2. The hydraulic jack according to claim 1, characterized in that: The oil pipe (6) surrounds the oil cylinder (3).

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