Hydraulic jack with high temperature early warning function

Abstract

The utility model discloses a hydraulic jack with a high temperature early warning function, which comprises a base, a sleeve is arranged at the top of the base, a large oil cylinder is arranged in the sleeve, an ejection platform is arranged at the top of the large oil cylinder, a large piston is arranged in the large oil cylinder, and the ejection platform is arranged on the top of the large piston. A temperature early warning assembly is installed at the bottom of the large oil cylinder, a one-way valve is arranged on one side of the top of the base, a small oil cylinder is installed at the top of the one-way valve, a small piston is arranged in the small oil cylinder, and a handle is installed at the top of the small piston. According to the hydraulic jack with the high-temperature early warning function, the characteristic that the memory alloy cylinder is extremely sensitive to temperature change is utilized, the temperature of hydraulic oil can be accurately monitored in real time, in the operation process of equipment, once the oil temperature exceeds the normal range, the memory alloy cylinder can make a response rapidly, and the early warning function is achieved. When the induction alarm is triggered, the alarm immediately sends out a sharp and clear early warning signal.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic jack technology, specifically a hydraulic jack with a high temperature warning function. Background Technology

[0002] In the utility model patent application CN218434690U, published on February 3, 2023, entitled "A Hydraulic Jack with Temperature Warning Function", this utility model belongs to the field of hydraulic jack technology, specifically a hydraulic jack with temperature warning function. It includes a jack base plate, on the upper surface of which a hydraulic jack body is provided. A drive mechanism is provided on one side of the hydraulic jack body, and a warning mechanism is provided on one side of the drive mechanism. The warning mechanism is connected to the warning mechanism. This utility model solves the safety hazard problem caused by improper operation by workers due to not knowing the internal temperature of the hydraulic jack in hot weather.

[0003] In the prior art, including the aforementioned patents, hydraulic jacks, as a common lifting device, are widely used in industry and daily life due to their compact structure, ease of operation, and strong lifting capacity. However, during prolonged or high-load use, the hydraulic oil in the hydraulic system generates heat due to friction, pressure, and other factors, causing the oil temperature to rise. When the oil temperature is too high, the viscosity of the hydraulic oil decreases, reducing its lubrication performance and thus accelerating the wear of hydraulic components. This can even lead to hydraulic system failures, affecting the normal use of the jack and, in severe cases, posing safety hazards. Currently, most hydraulic jacks on the market lack effective temperature monitoring and early warning devices, and are relatively expensive and complex in structure, failing to provide timely and intuitive reminders to operators of abnormal oil temperatures, thus failing to meet the requirements for safe and reliable use. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic jack with a high temperature warning function to solve the problem mentioned in the background art that it is difficult to issue a warning signal in a timely manner when the oil temperature reaches or exceeds the set high temperature threshold.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic jack with a high-temperature early warning function, comprising a base, a sleeve installed on the top of the base, a large hydraulic cylinder disposed inside the sleeve, an ejection platform installed on the top of the large hydraulic cylinder, a large piston disposed inside the large hydraulic cylinder, a temperature early warning component disposed at the bottom of the large hydraulic cylinder, a one-way valve disposed on one side of the top of the base, a small hydraulic cylinder disposed on the top of the one-way valve, a small piston disposed inside the small hydraulic cylinder, a handle disposed on the top of the small piston, a bracket disposed on the top of the base, and a return groove opened inside the base.

[0006] Furthermore, a tension spring is provided inside the reflux trough, and a flow-stopping steel ball is provided at one end of the tension spring.

[0007] Furthermore, the temperature warning component internally includes a shape memory alloy cylinder, a transmission rod, a lever amplification mechanism, a gear, a rack, a sensor alarm, a pointer, and a return spring. The shape memory alloy cylinder is disposed inside the base, and a transmission rod is installed at the top of the inside of the shape memory alloy cylinder. A lever amplification mechanism is disposed through one end of the transmission rod, and a gear is installed at one end of the transmission rod. A rack is movably installed on the inner wall of the sleeve, and a sensor alarm is installed on the inner wall of the sleeve. A pointer is fixedly connected to one end of the transmission rod, and a return spring is installed at the bottom of the lever amplification mechanism.

[0008] Furthermore, the shape memory alloy cylinder is a nickel-titanium alloy cylinder, and the lever amplification mechanism passes through the shape memory alloy cylinder and is connected to the transmission rod.

[0009] Furthermore, the gear and rack mesh with each other, and one end of the rack after movement comes into contact with the sensor alarm. The outer wall of the sleeve at the pointer is provided with a color indicator.

[0010] Furthermore, the one-way valve is located at one end of the return channel between the large and small oil cylinders, and a pressure regulating device is provided inside the one-way valve.

[0011] Furthermore, the height of the bracket is adjustable, and the surface of the ejection platform is provided with anti-slip texture.

[0012] Compared with the prior art, the beneficial effects of this utility model are: this hydraulic jack with high temperature warning function is reasonable and has the following advantages:

[0013] (1) This utility model utilizes the temperature warning component designed by the shape memory alloy cylinder to be extremely sensitive to temperature changes. It can monitor the temperature of hydraulic oil in real time and accurately. During the operation of the equipment, once the oil temperature exceeds the normal range, the shape memory alloy cylinder will respond quickly and trigger the induction alarm. The alarm will immediately emit a sharp and clear warning signal. At the same time, the pointer will quickly point to the corresponding high temperature area on the color indicator panel. The current temperature status is displayed intuitively through the eye-catching color. The operator can notice the alarm and indication at the first time and take effective measures such as stopping the machine to cool down and checking the cooling system in time. This can effectively avoid equipment failure caused by excessive oil temperature, reduce the risk of safety accidents, and ensure the safety and stability of the operation process.

[0014] (2) Through the tension spring and the stop-flow steel ball equipped in the return groove, a tight and efficient cooperation mechanism is formed with the check valve. When the jack is working, when the hydraulic oil flows in the specified direction, the stop-flow steel ball overcomes the elastic force of the tension spring under the action of the hydraulic oil pressure, and smoothly allows the hydraulic oil to pass through the check valve. When the hydraulic oil shows a backflow tendency, the tension spring will quickly exert force to press the stop-flow steel ball tightly against the valve port of the check valve, effectively preventing the hydraulic oil from flowing back, thus ensuring the unidirectional flow of the hydraulic oil. This ensures that the jack can lift the heavy object stably. During the pressure holding stage, the predetermined pressure is maintained to avoid displacement of the heavy object due to pressure fluctuations. At the same time, the check valve is carefully designed with a pressure regulating device. This device can flexibly adjust the hydraulic system pressure according to the actual load size. When the load is light, the system pressure is appropriately reduced to avoid energy waste and improve energy utilization efficiency. When the load is heavy, the system pressure is promptly increased to ensure that the jack has sufficient lifting force, further improving the working performance of the jack and its applicability to different working scenarios. Attached Figure Description

[0015] Figure 1 This is an overall drawing of the present utility model;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 This is a side view of the present invention;

[0018] Figure 4 This is a cross-sectional view of the present invention;

[0019] Figure 5 This is a diagram of the temperature warning component and base of this utility model.

[0020] In the diagram: 1. Base; 2. Sleeve; 3. Large hydraulic cylinder; 4. Ejection platform; 5. Large piston; 6. Temperature warning component; 601. Shape memory alloy cylinder; 602. Transmission rod; 603. Lever amplification mechanism; 604. Gear; 605. Rack; 606. Sensor alarm; 607. Pointer; 608. Return spring; 7. One-way valve; 8. Small hydraulic cylinder; 9. Small piston; 10. Handle; 11. Bracket; 12. Return channel; 13. Tension spring; 14. Flow-stopping steel ball. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 The present invention provides a technical solution as follows:

[0023] Example 1:

[0024] A hydraulic jack with a high temperature warning function includes a base 1, a sleeve 2 installed on the top of the base 1, a large oil cylinder 3 installed inside the sleeve 2, an ejection platform 4 installed on the top of the large oil cylinder 3, a large piston 5 installed inside the large oil cylinder 3, a temperature warning component 6 installed at the bottom of the large oil cylinder 3, a one-way valve 7 installed on one side of the top of the base 1, a small oil cylinder 8 installed on the top of the one-way valve 7, a small piston 9 installed inside the small oil cylinder 8, a handle 10 installed on the top of the small piston 9, a bracket 11 installed on the top of the base 1, a return groove 12 opened inside the base 1, a tension spring 13 installed inside the return groove 12, and a stop-flow steel ball 14 installed at one end of the tension spring 13.

[0025] The above structure, through the combined action of the traction spring 13 and the hydraulic pressure during the flow of hydraulic oil, acts as an auxiliary function of the one-way valve 7, ensuring that the oil flows in the specified direction, preventing backflow, and ensuring the stability of the jack's operation.

[0026] Furthermore, the internal components of the temperature warning assembly 6 include a shape memory alloy cylinder 601, a transmission rod 602, a lever amplification mechanism 603, a gear 604, a rack 605, a sensor alarm 606, a pointer 607, and a return spring 608. The shape memory alloy cylinder 601 is housed inside the base 1. The transmission rod 602 is mounted on the top of the shape memory alloy cylinder 601. One end of the transmission rod 602 is connected to the lever amplification mechanism 603, and the gear 604 is mounted on one end of the transmission rod 602. A gear 604 is movably mounted on the inner wall of the sleeve 2. The rack 605 has a sensor alarm 606 installed on the inner wall of the sleeve 2. One end of the transmission rod 602 is fixedly connected to a pointer 607. A return spring 608 is installed at the bottom of the lever amplification mechanism 603. The shape memory alloy cylinder 601 is a nickel-titanium alloy cylinder, and the lever amplification mechanism 603 passes through the shape memory alloy cylinder 601 and is connected to the transmission rod 602. The gear 604 meshes with the rack 605, and one end of the rack 605 after movement is in contact with the sensor alarm 606. A color indicator is provided on the outer wall of the sleeve 2 at the pointer 607.

[0027] The above structure has a color indicator plate set on the outer wall of the sleeve 2 at the position corresponding to the pointer 607. Different colors are used to intuitively display the current oil temperature status. For example, green indicates the normal temperature range, yellow indicates the temperature is close to the critical value, and red indicates the temperature has exceeded the danger value.

[0028] Furthermore, the one-way valve 7 is located at one end of the return channel 12 between the large oil cylinder 3 and the small oil cylinder 8. The one-way valve 7 is equipped with a pressure regulating device, the height of the bracket 11 is adjustable, and the surface of the ejection platform 4 is provided with anti-slip texture.

[0029] The aforementioned structure, through its internal pressure regulating device, can adjust the opening pressure of the one-way valve 7 according to actual working needs, thereby achieving flexible control of the hydraulic system pressure and meeting the lifting requirements of different loads.

[0030] Working Principle: During operation, the temperature warning function of this hydraulic jack primarily relies on the temperature warning component 6. The shape memory alloy cylinder 601 within the temperature warning component 6 is made of nickel-titanium alloy, which is sensitive to temperature changes. During operation, the shape memory alloy cylinder 601 is in full contact with the hydraulic oil in the large cylinder 3, sensing oil temperature changes in real time. When the hydraulic oil temperature rises due to prolonged operation or high load, the shape memory alloy cylinder 601 expands and elongates. The transmission rod 602 at the top of the shape memory alloy cylinder 601 moves upwards as the cylinder expands. This movement of the transmission rod 602 drives the lever amplification mechanism 603, which amplifies the minute displacement of the transmission rod 602 using the lever principle. The amplified displacement is then transmitted to the gear 604 via the transmission rod 602, causing the gear 604 to rotate.

[0031] Secondly, since gear 604 meshes with rack 605 on the inner wall of sleeve 2, the rotation of gear 604 drives rack 605 to move linearly upward along the inner wall of sleeve 2. When the oil temperature rises to a certain level, that is, when the shape memory alloy cylinder 601 expands to a certain extent, the upward-moving end of rack 605 will contact the sensor alarm 606 installed on the inner wall of sleeve 2, triggering the sensor alarm 606 to emit an audible and visual alarm signal, reminding the operator that the hydraulic oil temperature has exceeded the safety threshold and that cooling measures should be taken in time. A pointer 607 fixedly connected to one end of transmission rod 602 rotates with the movement of transmission rod 602. A color indicator plate is set on the outer wall of sleeve 2 at the position corresponding to pointer 607. As pointer 607 rotates, it will point to different color areas, such as green area indicating that the current oil temperature is within the normal range, yellow area indicating that the oil temperature is close to the critical value, and red area indicating that the oil temperature has exceeded the danger value. The operator can intuitively judge the current oil temperature status by the color pointed to by pointer 607.

[0032] Finally, when the hydraulic oil temperature drops, the shape memory alloy cylinder 601 contracts. Under the action of the return spring 608 at the bottom of the lever amplification mechanism 603, the lever amplification mechanism 603 resets, driving the gear 604, rack 605 and pointer 607 back to their initial positions. The sensor alarm 606 stops alarming and waits for the next temperature change monitoring.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydraulic jack with high temperature early warning function, comprising a base (1), characterized in that: A sleeve (2) is installed on the top of the base (1). A large oil cylinder (3) is installed inside the sleeve (2). An ejection platform (4) is installed on the top of the large oil cylinder (3). A large piston (5) is installed inside the large oil cylinder (3). A temperature warning component (6) is installed at the bottom of the large oil cylinder (3). A one-way valve (7) is installed on one side of the top of the base (1). A small oil cylinder (8) is installed on the top of the one-way valve (7). A small piston (9) is installed inside the small oil cylinder (8). A handle (10) is installed on the top of the small piston (9). A bracket (11) is installed on the top of the base (1). A reflux groove (12) is opened inside the base (1).

2. The hydraulic jack with high temperature early warning function according to claim 1, characterized in that: The reflux trough (12) is equipped with a tension spring (13), and one end of the tension spring (13) is equipped with a flow-stopping steel ball (14).

3. The hydraulic jack with high temperature early warning function according to claim 1, characterized in that: The temperature warning component (6) includes a shape memory alloy cylinder (601), a transmission rod (602), a lever amplification mechanism (603), a gear (604), a rack (605), a sensor alarm (606), a pointer (607), and a return spring (608). The shape memory alloy cylinder (601) is installed inside the base (1). The transmission rod (602) is installed at the top inside the shape memory alloy cylinder (601). The lever amplification mechanism (603) is installed through one end of the transmission rod (602). The gear (604) is installed at one end of the transmission rod (602). The rack (605) is movably installed on the inner wall of the sleeve (2). The sensor alarm (606) is installed on the inner wall of the sleeve (2). The pointer (607) is fixedly connected to one end of the transmission rod (602). The return spring (608) is installed at the bottom of the lever amplification mechanism (603).

4. The hydraulic jack with high temperature early warning function according to claim 3, characterized in that: The shape memory alloy cylinder (601) is a nickel-titanium alloy cylinder, and the lever amplification mechanism (603) passes through the shape memory alloy cylinder (601) and is connected to the transmission rod (602).

5. The hydraulic jack with high temperature early warning function according to claim 3, characterized in that: The gear (604) meshes with the rack (605), and one end of the rack (605) after movement is in contact with the sensor alarm (606). The outer wall of the sleeve (2) at the pointer (607) is provided with a color indicator.

6. The hydraulic jack with high temperature early warning function according to claim 1, characterized in that: The one-way valve (7) is located at one end of the return groove (12) between the large oil cylinder (3) and the small oil cylinder (8), and a pressure regulating device is provided inside the one-way valve (7).

7. The hydraulic jack with high temperature early warning function according to claim 1, characterized in that: The height of the bracket (11) is adjustable, and the surface of the ejection platform (4) is provided with anti-slip texture.

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