Hydraulic piston metal casting

Abstract

The utility model relates to the technical field of jacks, and discloses a hydraulic piston metal casting which comprises a piston body, an inner cavity is coaxially formed in the top end of the piston body, a heating module is installed in the inner cavity and comprises a sealing cover, the sealing cover is further fixedly installed at the top end of the piston body, and a saddle is fixed to the sealing cover. An ejector rod is coaxially arranged on the sealing cover in a penetrating mode, the top end of the ejector rod upwards penetrates and extends out of the saddle, a heat accumulator is coaxially arranged in the inner cavity, and the bottom end of the ejector rod extends into the inner cavity and is fixedly connected with the heat accumulator. The heating module is installed in the piston body, the heat accumulator in the heating module can keep a contact state with the inner wall of the inner cavity when the jack is used so as to absorb heat generated in the working process of the jack, and when the jack is not used, a gap is kept between the heat accumulator and the inner wall of the inner cavity so as to absorb heat generated in the working process of the jack. And heat of the heat accumulator can be released at a slow speed, so that the temperature of the jack is not too low.

Description

Technical Field

[0001] The utility model relates to the technical field of jacks, and more specifically, to a hydraulic piston metal casting. Background Art

[0002] When the jack is used in cold areas, the sudden drop in temperature will cause the viscosity of the hydraulic oil of the hydraulic jack to increase significantly, and this change will seriously affect the fluidity of the hydraulic oil, which will slow down the lifting and return speed of the hydraulic jack, and even condense in extreme cases, causing the jack to take longer to operate or directly fail to work properly. Then there is the impact of the sudden drop in temperature on the seals of the hydraulic jack. The seals of the hydraulic jack may become more fragile and easily damaged at low temperatures. Once the sealing of the hydraulic jack is reduced, this will directly increase the risk of leakage in the hydraulic system and reduce the efficiency and stability of the jack. In the face of these situations, try to take some warming measures to maintain the fluidity of the hydraulic oil. However, due to relying solely on warming measures, in a long-term static environment, as heat is lost, the temperature of the jack may still be too low. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a hydraulic piston metal casting to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic piston metal casting, comprising a piston body, a coaxial inner cavity is opened at the top of the piston body, the inner cavity is cylindrical, a heating module is installed in the inner cavity, the heating module comprises a sealing cover, a saddle, a push rod, a heat storage body, and an elastic element, a sealing cover is also fixedly installed on the top of the piston body, a saddle is fixed on the sealing cover, a push rod is coaxially penetrated on the sealing cover, the top of the push rod penetrates upward and extends out of the saddle, a heat storage body is coaxially arranged in the inner cavity, and a gap is maintained around the heat storage body and the inner wall of the inner cavity in a static state, the top of the heat storage body is connected to the inner wall of the top of the inner cavity by a plurality of elastic elements, the bottom end of the push rod extends into the inner cavity, and it is fixedly connected to the heat storage body, so that when the push rod moves downward, the heat storage body can be pushed to the bottom of the inner cavity, and the bottom end contacts the inner wall of the inner cavity.

[0005] As a preferred technical solution of the utility model, the elastic element is an elastic band, and the elastic band is made of rubber material.

[0006] As a preferred technical solution of the utility model, the top rod includes a rod body, a rubber pad is fixed to the top end of the rod body, and a heat insulation block is fixed to the bottom end of the rod body, and the heat insulation block is made of nylon.

[0007] As a preferred technical solution of the utility model, the inner cavity is filled with a heat-insulating gas, and the heat-insulating gas is carbon dioxide.

[0008] As a preferred technical solution of the utility model, the heat storage body includes a storage body, a storage cavity is provided in the storage body, the storage cavity is filled with heat storage material, and a metal mesh is also embedded in the heat storage material in the storage cavity; the outer surface of the heat storage body except the bottom is sprayed with insulation material.

[0009] As a preferred technical solution of the utility model, a plurality of cones are fixed on the heat storage body at intervals along its length direction, a contact ring is coaxially fixed in the inner cavity below each of the cones, a plurality of air holes are opened on the surface of the contact ring along the circumferential direction, and the inner diameter of the contact ring is less than or equal to the maximum diameter of the cone.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] After the casting is installed in the jack, an inner cavity is opened in the piston body, and a heating module is installed in the inner cavity. When the jack is in use, the heat storage body in the heating module can keep in contact with the inner wall of the inner cavity, so as to absorb the heat generated during the operation of the jack. When the jack is not in use, a gap is maintained between the heat storage body and the inner wall of the inner cavity. The heat-insulating gas filled in the inner cavity can release the heat of the heat storage body at a slow speed, so that the jack can absorb the heat of the heat storage body for a long time, so that the temperature of the jack will not be too low. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a hydraulic piston metal casting of the utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of a hydraulic piston metal casting of the utility model;

[0014] Figure 3 It is a cross-sectional schematic diagram of a hydraulic piston metal casting of the utility model;

[0015] Figure 4 This is a schematic diagram of a hydraulic piston metal casting according to the utility model when the heat storage body is not in contact with the bottom of the inner cavity;

[0016] Figure 5 This is a schematic diagram of a hydraulic piston metal casting heat storage body in contact with the bottom of the inner cavity of the utility model.

[0017] In the figure: 1. piston body; 2. sealing cover; 3. saddle; 4. rod body; 5. rubber pad; 6. insulation block; 7. heat storage body; 8. elastic element; 9. cone; 10. contact ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figures 1 to 5 As shown, the utility model provides a hydraulic piston metal casting, including a piston body 1, a piston body 1 top end coaxially opened with an inner cavity, the inner cavity is cylindrical, a heating module is installed in the inner cavity, the heating module is used to heat the piston body 1 under low temperature state; the heating module includes a sealing cover 2, a saddle 3, a push rod, a heat storage body 7, and an elastic element 8, the piston body 1 top end is also fixedly installed with a sealing cover 2, the sealing cover 2 is fixed with a saddle 3, the sealing cover 2 is coaxially penetrated with a push rod, the top end of the push rod penetrates upward and extends to the outside of the saddle 3, a heat storage body 7 is coaxially arranged in the inner cavity, the heat storage body 7 in a static state maintains a gap around the inner wall of the inner cavity, the top end of the heat storage body 7 is connected to the inner wall of the top of the inner cavity by a plurality of elastic elements 8, the bottom end of the push rod extends into the inner cavity, and it is fixedly connected to the heat storage body 7, so that when the push rod moves downward, the heat storage body 7 can be pushed to the bottom of the inner cavity, and the bottom end of the heat storage body 7 contacts the inner wall of the inner cavity.

[0020] The elastic element 8 is an elastic band, and the elastic band is made of rubber material. Usually, the elastic element 8 is a metal spring. In this solution, if a metal spring is used as the elastic element 8, the metal spring will form a fast heat conduction channel between the heat storage body 7 and the piston body 1, thereby quickly transferring the heat of the heat storage body 7 to the piston body 1, causing the heat of the heat storage body 7 to be lost quickly. The elastic band made of rubber material can block the heat transfer between the heat storage body 7 and the piston body 1 while ensuring the elastic force of the elastic element 8.

[0021] The push rod includes a rod body 4, a rubber pad 5 is fixed to the top of the rod body 4, and a heat insulation block 6 is fixed to the bottom of the rod body 4. The heat insulation block 6 is made of nylon. Similar to the elastic element 8, the commonly used metal push rod will also form a heat conduction channel between the heat storage body 7 and the piston body 1. The heat insulation block 6 made of nylon is arranged at the bottom of the rod body 4, which can effectively reduce the heat conduction rate between the rod body 4 and the heat storage body 7.

[0022] The inner cavity is filled with heat-insulating gas, which is carbon dioxide. Carbon dioxide can be used as the heat storage body 7 in the inner cavity to keep warm, reduce the heat conduction rate between the heat storage body 7 and the piston body 1, so that the heat storage body 7 can slowly release heat for a long time.

[0023] The heat storage body 7 includes a storage body, a storage cavity is provided in the storage body, the storage cavity is filled with heat storage material, and a metal mesh is embedded in the heat storage material in the storage cavity; the outer surface of the heat storage body 7 except the bottom is sprayed with a heat preservation material. The heat storage material is paraffin, and the metal mesh can improve the temperature uniformity of the heat storage material. At the same time, the heat preservation material can be a polyurethane coating, which can reduce the heat dissipation speed of the heat storage body 7, so that the heat storage body 7 can maintain a heat dissipation state for a long time.

[0024] Several cones 9 are fixed at intervals along the length direction of the heat storage body 7. A contact ring 10 is coaxially fixed in the inner cavity below each cone 9. Several air holes are opened on the surface of the contact ring 10 along the circumferential direction. The inner diameter of the contact ring 10 is less than or equal to the maximum diameter of the cone 9. The cone 9 is made of a flexible heat-conducting silicone material, so that the cone 9 can be deformed. In this way, when the heat storage body 7 is loaded into the inner cavity, the cone 9 can pass through the contact ring 10 after deformation to avoid the cone 9 being blocked by the contact ring 10. The heat transfer is only achieved by the contact between the bottom end of the heat storage body 7 and the inner wall of the inner cavity, so that the heat absorption speed of the heat storage body 7 is limited. Therefore, the cone 9 and the contact ring 10 are set. When the bottom end of the heat storage body 7 contacts the inner wall of the inner cavity under the action of the push rod, the cone 9 also directly contacts the contact ring 10, so that the contact area between the heat storage body 7 and the piston body 1 is increased, thereby improving the heat absorption speed of the heat storage body 7.

[0025] When the utility model is in use, after the casting is installed on the jack, when the jack is used, the load above the jack will press the push rod downward, and the push rod pushes the heat storage body 7 in the inner cavity of the piston main body 1 downward, so that the bottom end of the heat storage body 7 contacts the inner wall of the bottom of the inner cavity, and then in the process of the jack working, the heat generated will be transmitted to the piston main body 1, and the piston main body 1 transfers the heat to the heat storage body 7, and the heat storage body 7 continuously absorbs heat; when the jack is withdrawn, the elastic element 8 of the heat storage body 7 pushes the heat storage body 7 and the push rod to reset, so that a gap is maintained between the heat storage body 7 and the inner wall of the inner cavity, and with the help of the heat-insulating gas filled in the inner cavity, the heat of the heat storage body 7 will be released at a slow speed, so that the piston main body 1 in the jack can release heat to the oil in the jack for a long time, so that in a low temperature environment, the fluidity of the oil in the jack can be prevented from deteriorating.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic piston metal casting, comprising a piston body (1), characterized in that: The piston body (1) has an inner cavity coaxially formed at the top end thereof, the inner cavity being cylindrical, and a heating module being installed in the inner cavity; the heating module comprising a sealing cover (2), a saddle (3), a push rod, a heat storage body (7), and an elastic element (8); the piston body (1) is also fixedly mounted with a sealing cover (2) at the top end thereof, the sealing cover (2) being fixed with a saddle (3); a push rod coaxially penetrating the sealing cover (2); the top end of the push rod penetrating upward and extending out of the saddle (3); a heat storage body (7) coaxially arranged in the inner cavity; in a stationary state, the heat storage body (7) has a gap around it and the inner wall of the inner cavity; the top end of the heat storage body (7) is connected to the inner wall of the top of the inner cavity via a plurality of elastic elements (8); the bottom end of the push rod extends into the inner cavity and is fixedly connected to the heat storage body (7), so that when the push rod moves downward, the heat storage body (7) can be pushed to the bottom of the inner cavity, and the bottom end contacts the inner wall of the inner cavity.

2. A hydraulic piston metal casting according to claim 1, characterized in that: The elastic element (8) is an elastic band, and the elastic band is made of rubber material.

3. A hydraulic piston metal casting according to claim 1, characterized in that: The top rod comprises a rod body (4), a rubber pad (5) is fixed to the top end of the rod body (4), and a heat insulation block (6) is fixed to the bottom end of the rod body (4), and the heat insulation block (6) is made of nylon.

4. A hydraulic piston metal casting according to claim 1, characterized in that: The inner cavity is filled with a heat-insulating gas, which is carbon dioxide.

5. The hydraulic piston metal casting according to claim 1, characterized in that: The heat storage body (7) comprises a storage body, a storage cavity is arranged in the storage body, the storage cavity is filled with heat storage material, and a metal mesh is embedded in the heat storage material in the storage cavity; the outer surface of the heat storage body (7) except the bottom is sprayed with heat insulation material.

6. A hydraulic piston metal casting according to claim 1, characterized in that: A plurality of cones (9) are fixed at intervals along the length direction of the heat storage body (7), a contact ring (10) is coaxially fixed in the inner cavity below each of the cones (9), a plurality of air holes are opened on the surface of the contact ring (10) along the circumferential direction, and the inner diameter of the contact ring (10) is less than or equal to the maximum diameter of the cone (9).

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