Load overload protection component for hydraulic jack

Abstract

The utility model discloses a load overload protection component for a hydraulic jack, belongs to the technical field of jack protection components, and aims to solve the problem that a fixed shell is easy to slip due to insufficient stability of connection in a manner that one end of a fastening screw is propped against the output end of the jack, and the load overload protection component comprises a jack body, a connecting column is arranged at the top of the jack body, an inserting rod is inserted into the top of the connecting column, a bearing disc is fixed to the top of the inserting rod, a pressure sensor is fixed to an inner cavity of the top surface of the bearing disc, a bottom groove is formed in the surface of the bottom of the connecting column, and the output end of the jack body extends into the bottom groove and abuts against the inner surface of the bottom groove. Under the abutting action between the clamping ring and the inner surface of the connecting opening, the situation that the connecting column slips when the device supports a heavy object can be avoided, and therefore the safety of the device in the using process is improved, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of jack protection components, and in particular relates to a load overload protection component for a hydraulic jack. Background Art

[0002] A hydraulic jack is a jack that uses a plunger or hydraulic cylinder as a rigid lifting member. It has the characteristics of compact structure, stable operation, strong lifting force, and self-locking. The hydraulic jack has a strong lifting capacity, and the lifting force of a heavy-duty hydraulic jack exceeds one hundred tons. When using a hydraulic jack, it can be used with corresponding protective components to prevent the hydraulic jack from being overloaded, thereby improving the safety of the hydraulic jack when in use.

[0003] The prior art publication number is CN215726525U, which is a pressure detection device for a jack with an overpressure protection function. The device is connected by sliding a support column inside a conducting hole, so that the spring is compressed, and the inner shell applies a downward force to the top column through the through hole. One end of the top column slides into the accommodating groove, so that the inner shell slides downward, and the inner shell drives the top plate to move downward. At the same time, the pressure sensor moves downward, thereby preventing the pressure sensor from being damaged by excessive pressure, realizing that the pressure sensor has an overpressure protection function, and preventing the jack body from being deformed due to excessive lifting force. However, in actual use, the fixed shell and the jack body are connected by rotating four fastening screws respectively, so that one end of the four fastening screws is against the top of the jack body, thereby achieving detachability from the jack body. However, the stability of the connection is insufficient by only using one end of the fastening screw to resist the output end of the jack. When the jack body supports a heavy object, the fixed shell is prone to slipping due to pressure, which is not conducive to use.

[0004] Therefore, a load overload protection component for a hydraulic jack is needed to solve the problem in the prior art that the connection by only fastening one end of the screw against the output end of the jack is not stable enough and the fixed housing is prone to slippage. Utility Model Content

[0005] The utility model aims to provide a load overload protection component for a hydraulic jack to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a load overload protection component for a hydraulic jack, comprising a jack body, a connecting column is arranged on the top of the jack body, a plug rod is inserted on the top of the connecting column, a bearing plate is fixed on the top of the plug rod, a pressure sensor is fixed on the inner cavity of the top surface of the bearing plate, a bottom groove is opened on the surface of the bottom of the connecting column, the output end of the jack body extends to the inside of the bottom groove and conflicts with the inner surface of the bottom groove, the outer peripheral surface of the bottom groove is connected with four rectangular grooves which are equidistantly distributed, a connecting port is opened on the surface of the inner part of the bottom groove where the output end of the jack body is located, four clamping rings are inserted inside the connecting port, a threaded rod is rotatably connected to the inner cavity surface of the rectangular groove, one end of the threaded rod passes through the connecting column and extends to the outside of the connecting column, a threaded sleeve is threadedly connected to the outer peripheral surface of the threaded rod at the position of the inner part of the rectangular groove, and the surface of the threaded sleeve close to one end of the clamping ring at the adjacent position is fixed to the surface of the clamping ring at the adjacent position.

[0007] It should be noted in the scheme that an inner warehouse is opened at the middle position of the inner surface of the connecting column, and a connecting disk is movably inserted inside the inner warehouse. The surface of the bottom of the insertion rod extends to the inside of the inner warehouse and is fixed to the surface of the top of the connecting disk. A spring is provided at the position of the inner cavity of the inner warehouse at the bottom of the connecting disk.

[0008] It is further worth noting that one end of the spring is fixed to the surface of the connecting disk, and the other end of the spring is fixed to the bottom of the inner cavity surface of the inner chamber.

[0009] It should be further explained that the outer circumferential surface of the connecting disk is provided with four openings which are equidistantly distributed around the connection disk, and a limiting strip is inserted through the interior of the opening. The surface of one end of the limiting strip passes through the adjacent opening and is fixed to the inner circumferential surface of the inner bin.

[0010] As a preferred embodiment, the top of the bottom groove is connected to a positioning groove, a positioning block is inserted into the positioning groove, and the bottom of the positioning block extends to the interior of the inner bin and is fixed to the surface of the top of the output end of the jack body.

[0011] As a preferred embodiment, the surface of the clamping ring close to the output end of the jack body is arranged in an arc shape, and four clamping rings are arranged in an equidistant and surrounding manner.

[0012] Compared with the prior art, the load overload protection component for a hydraulic jack provided by the utility model has at least the following beneficial effects:

[0013] (1) After the output end of the jack body is extended to the inside of the bottom groove, the threaded rod is rotated respectively, so that the threaded sleeve can drive the clamp ring to extend to the inside of the connecting port, thereby clamping and fixing the output end of the jack body. Therefore, due to the interference between the clamp ring and the inner surface of the connecting port, the connecting column can be prevented from slipping when the device supports a heavy object, thereby improving the safety of the device when in use, thereby improving the practicality of the device.

[0014] (2) By starting the jack body, the rod moves in the vertical direction to support the weight, so that the rod is forced to move downward, and the connecting plate is forced to move downward. Therefore, the movement trajectory of the connecting plate can be limited under the interference between the inner surface of the opening and the limit strip, so that the connecting plate can move downward in the vertical direction, so that the spring can be evenly stressed, thereby further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of a three-dimensional structural section in the front view direction of a local structure of the utility model;

[0017] Figure 3 For the utility model Figure 2 A schematic diagram of the structure enlargement in the middle;

[0018] Figure 4 It is a schematic diagram of a three-dimensional structure cross-section of the utility model in a top view direction;

[0019] Figure 5 For the utility model Figure 4 Enlarged schematic diagram of the structure at point B in the middle.

[0020] In the figure: 1. Jack body; 2. Connecting column; 3. Insert rod; 4. Load plate; 5. Pressure sensor; 6. Inner compartment; 7. Bottom groove; 8. Positioning groove; 9. Positioning block; 10. Connecting port; 11. Threaded rod; 12. Clamp ring; 13. Spring; 14. Connecting plate; 15. Opening; 16. Limiting strip; 17. Rectangular groove; 18. Threaded sleeve. Implementation

[0021] See also Figure 1-5The utility model provides a load overload protection component for a hydraulic jack, comprising a jack body 1, a connecting column 2 is arranged on the top of the jack body 1, a plug rod 3 is inserted on the top of the connecting column 2, a bearing plate 4 is fixed on the top of the plug rod 3, a pressure sensor 5 is fixed on the inner cavity of the top surface of the bearing plate 4, a bottom groove 7 is opened on the surface of the bottom of the connecting column 2, the output end of the jack body 1 extends to the inside of the bottom groove 7 and conflicts with the inner surface of the bottom groove 7, the outer peripheral surface of the bottom groove 7 is connected with four rectangular grooves 17 which are equidistantly distributed, a connecting port 10 is opened on the surface of the inner part of the bottom groove 7 of the output end of the jack body 1, four clamping rings 12 are inserted in the connecting port 10, and the inner cavity surface of the rectangular groove 17 is rotatably connected to the inner surface of the rectangular groove 17. There is a threaded rod 11, one end of the threaded rod 11 passes through the connecting column 2 and extends to the outside of the connecting column 2. The outer peripheral surface of the threaded rod 11 is located at the position of the inner part of the rectangular groove 17 and is threadedly connected with a threaded sleeve 18. The surface of the threaded sleeve 18 close to one end of the adjacent clamp ring 12 is fixed to the surface of the adjacent clamp ring 12. After the output end of the jack body 1 is extended to the inside of the bottom groove 7, the threaded rod 11 is rotated respectively, so that the threaded sleeve 18 can drive the clamp ring 12 to extend to the inside of the connecting port 10, thereby clamping and fixing the output end of the jack body 1, so that the friction between the clamp ring 12 and the inner surface of the connecting port 10 can prevent the connecting column 2 from slipping when the device supports heavy objects.

[0022] Further Figure 1 and Figure 2 As shown, it is worth explaining in detail that an inner bin 6 is opened at the middle position of the inner surface of the connecting column 2, and a connecting disk 14 is movably inserted inside the inner bin 6. The surface of the bottom of the insertion rod 3 extends to the inside of the inner bin 6 and is fixed to the surface of the top of the connecting disk 14. A spring 13 is provided at the position where the inner cavity of the inner bin 6 is located at the bottom of the connecting disk 14. One end of the spring 13 is fixed to the surface of the connecting disk 14, and the other end of the spring 13 is fixed to the bottom of the inner cavity surface of the inner bin 6. By controlling the output end of the jack body 1, the insertion rod 3 can move in the vertical direction, so that when the load plate 4 supports the load, the insertion rod 3 can drive the connecting disk 14 to move downward, thereby compressing the spring 13 to cause it to deform, and the rebound force of the spring 13 can reduce the pressure on the output end of the jack body 1.

[0023] Further Figure 2 As shown, it is worth explaining in detail that the outer peripheral surface of the connecting disk 14 is provided with four openings 15 which are equidistantly distributed, and a limiting strip 16 is inserted through the inside of the opening 15. The surface of one end of the limiting strip 16 passes through the adjacent opening 15 and is fixed to the inner peripheral surface of the inner bin 6. When the connecting disk 14 is forced to move downward, the movement trajectory of the connecting disk 14 can be limited due to the interference between the limiting strip 16 and the inner surface of the opening 15, so that the connecting disk 14 can move vertically downward.

[0024] Further Figure 2 As shown, it is worth specifically explaining that the top of the bottom groove 7 is connected to a positioning groove 8, and a positioning block 9 is inserted into the positioning groove 8. The bottom of the positioning block 9 extends to the interior of the inner bin 6 and is fixed to the surface of the top of the output end of the jack body 1. When the output end of the jack body 1 is connected to the connecting column 2, the positioning block 9 can extend to the interior of the positioning groove 8, thereby being able to play a positioning role in the installation of the connecting column 2, thereby facilitating the installation of the connecting column 2.

[0025] The present solution has the following working process: in actual use, when the user needs to connect the jack body 1 with the connecting column 2, so as to protect the jack body 1 through the connecting column 2 to prevent the jack body 1 from being overloaded, the output end of the jack body 1 is extended to the inside of the bottom groove 7 and the positioning block 9 is extended to the inside of the positioning groove 8, and then the threaded rod 11 is rotated in sequence. Since the inner wall of the rectangular groove 17 can play a role of resisting and limiting the threaded sleeve 18, the threaded sleeve 18 can cooperate with the internal thread structure of the inner wall of the threaded sleeve 18 and the external thread structure of the outer peripheral surface of the threaded rod 11 at the adjacent position, so that the clamp ring 12 can extend to the inside of the connecting port 10 and resist the inner wall of the connecting port 10, so that the four clamp rings 12 can clamp the fixed The output end of the jack body 1 is fixed, and when supporting a heavy object, the contact between the upper and lower surfaces of the clamp ring 12 and the inner surface of the connecting port 10 can prevent the connecting column 2 from slipping. By controlling the output end of the jack body 1, the connecting column 2 can move in the vertical direction until the load-bearing plate 4 and the pressure sensor 5 can fit the heavy object and lift it up. When the semiconductor material inside the pressure sensor 5 is subjected to the effect of geostress, the stress causes the change of the conductor, and the kinetic energy of the energy valley moves, causing its resistance to change. The working pressure value is reflected according to the change of resistance, so that the accurate value of the pressure applied to the output end of the jack body 1 can be known, thereby facilitating the user to avoid the overload of the jack body 1.

[0026] According to the above working process, it can be known that: by extending the output end of the jack body 1 to the inside of the bottom groove 7, by rotating the threaded rod 11 respectively, the threaded sleeve 18 can drive the clamp ring 12 to extend to the inside of the connecting port 10, thereby clamping and fixing the output end of the jack body 1, so that under the interference between the clamp ring 12 and the inner surface of the connecting port 10, the connecting column 2 can be prevented from slipping when the device supports a heavy object, thereby improving the safety of the device when in use, thereby improving the practicality of the device, and by starting the jack body 1, the insertion rod 3 moves in the vertical direction to support the heavy object, so that the insertion rod 3 is forced to move downward, so that the connecting disk 14 is forced to move downward, so that the friction between the inner cavity surface of the opening 15 and the limit strip 16 can limit the movement trajectory of the connecting disk 14, so that the connecting disk 14 can move downward in the vertical direction, so that the spring 13 can be evenly stressed, thereby further improving the practicality of the device.

[0027] Further Figure 4 As shown, it is worth explaining in detail that the surface of the clamp ring 12 close to the output end of the jack body 1 is arranged in an arc shape, and the four clamp rings 12 are arranged in an equidistant and surrounding manner. Due to the shape of the clamp ring 12, the contact area between the clamp ring 12 and the inner surface of the connecting port 10 is increased, and due to the position distribution of the clamp ring 12, a force can be applied to the inner surface of the connecting port 10 from multiple directions, thereby improving the connection stability between the connecting column 2 and the jack body 1.

[0028] In summary: by extending the output end of the jack body 1 to the inside of the bottom groove 7, by rotating the threaded rod 11 respectively, the threaded sleeve 18 can drive the clamp ring 12 to extend to the inside of the connecting port 10, thereby clamping and fixing the output end of the jack body 1, so that under the interference between the clamp ring 12 and the inner surface of the connecting port 10, the connecting column 2 can be prevented from slipping when the device supports a heavy object, thereby improving the safety of the device when in use, thereby improving the practicality of the device, and by starting the jack body 1, the insertion rod 3 is forced to move downward when supporting a heavy object, so that the connecting disk 14 is forced to move downward, so that the movement trajectory of the connecting disk 14 can be limited under the interference between the inner cavity surface of the opening 15 and the limit strip 16, so that the connecting disk 14 can move downward in the vertical direction, so that the spring 13 can be evenly stressed, thereby further improving the practicality of the device.

[0029] The pressure sensor 5 can be purchased on the market. The pressure sensor 5 is equipped with a power supply, which is a mature technology in this field and has been fully disclosed, so it will not be repeated in the specification.

Claims

1. A load overload protection component for a hydraulic jack, comprising a jack body (1), characterized in that: The top of the jack body (1) is provided with a connecting column (2), the top of the connecting column (2) is inserted with an insertion rod (3), the top of the insertion rod (3) is fixed with a bearing plate (4), the inner cavity of the top surface of the bearing plate (4) is fixed with a pressure sensor (5), the bottom surface of the connecting column (2) is provided with a bottom groove (7), the output end of the jack body (1) extends into the inside of the bottom groove (7) and contacts the inner surface of the bottom groove (7), the outer peripheral surface of the bottom groove (7) is connected with four rectangular grooves (17) which are equidistantly distributed around, and the output of the jack body (1) is connected to the bottom groove (7). A connection port (10) is provided on the surface of the inner part of the bottom groove (7), and four clamping rings (12) are inserted into the connection port (10). A threaded rod (11) is rotatably connected to the inner surface of the rectangular groove (17), and one end of the threaded rod (11) passes through the connecting column (2) and extends to the outside of the connecting column (2). A threaded sleeve (18) is threadedly connected to the outer peripheral surface of the threaded rod (11) at a position located in the inner part of the rectangular groove (17), and a surface of the threaded sleeve (18) close to one end of the adjacent clamping ring (12) is fixed to the surface of the adjacent clamping ring (12).

2. A load overload protection component for a hydraulic jack according to claim 1, characterized in that: An inner bin (6) is provided at a middle position of the inner surface of the connecting column (2), a connecting disk (14) is movably inserted inside the inner bin (6), a bottom surface of the insert rod (3) extends into the inner bin (6) and is fixed to a top surface of the connecting disk (14), and a spring (13) is provided at a position of the inner cavity of the inner bin (6) at the bottom of the connecting disk (14).

3. A load overload protection component for a hydraulic jack according to claim 2, characterized in that: One end of the spring (13) is fixed to the surface of the connecting plate (14), and the other end of the spring (13) is fixed to the bottom of the inner cavity surface of the inner chamber (6).

4. A load overload protection component for a hydraulic jack according to claim 3, characterized in that: The outer circumferential surface of the connection disk (14) is provided with four openings (15) which are equidistantly distributed around the connection disk, and a limiting strip (16) is inserted through the interior of the opening (15), and the surface of one end of the limiting strip (16) passes through the opening (15) at an adjacent position and is fixed to the inner circumferential surface of the inner bin (6).

5. The load overload protection component for a hydraulic jack according to claim 1, characterized in that: The top of the bottom groove (7) is connected to a positioning groove (8), a positioning block (9) is inserted into the interior of the positioning groove (8), and the bottom of the positioning block (9) extends into the interior of the inner bin (6) and is fixed to the surface of the top of the output end of the jack body (1).

6. The load overload protection component for a hydraulic jack according to claim 1, characterized in that: The surface of the clamping ring (12) close to one end of the output end of the jack body (1) is arranged in an arc shape, and four clamping rings (12) are arranged in an equidistant and surrounding distribution.

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