Hydraulic nut for coal mine machinery

Abstract

The utility model relates to the technical field of hydraulic nuts, and provides a hydraulic nut for coal mine machinery, which comprises a nut main body and a stretching head, and further comprises a positioning assembly arranged on the outer surface of the nut main body, and the positioning assembly comprises an annular plate fixedly arranged at the lower end of the outer surface of the nut main body; the annular groove is formed in the outer surface of the annular plate; the annular plate is movably arranged in the annular groove; when the stretching head stretches out through the piston top, the two positioning rods slide in the through holes formed in the outer surface of the connecting block, the stability of the stretching head can be improved through the positioning rods along with up-down adjustment of the stretching head, the stretching head is prevented from deviating and misplacing, the stretching head is arranged on the screw rod in a sleeving mode more stably, and the service life of the stretching head is prolonged. When the stretching head rotates, the positioning rod is driven to rotate through the connecting plate, the positioning rod drives the annular plate to rotate in the annular groove through the connecting block, the stretching head cannot be affected by the positioning rod during adjustment, and the installation efficiency of the stretching head is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic nut technology, and in particular to a hydraulic nut for coal mining machinery. Background Technology

[0002] Hydraulic nuts are high-precision, high-strength connecting components that utilize hydraulic principles for tightening. They are widely used in heavy machinery requiring high preload and high reliability. By using hydraulic pressure to stretch the bolt, they achieve uniform tightening and locking of the connection, providing an advanced tightening solution that is difficult to replace with traditional wrenches or torque tools.

[0003] However, in the existing technology, the traditional hydraulic nut has poor stability after the top of the extension head is extended. Especially when used in coal mining sites, the dust can easily cause the extension head to deviate, resulting in thread misalignment or stripping, which reduces the performance and life of the hydraulic nut. Moreover, if an external fixing collar is used, the extension head needs to be extended before fixing, which reduces the fixing effect of the extension head, and the subsequent disassembly and assembly are more time-consuming and laborious. Utility Model Content

[0004] The purpose of this invention is to solve the problem that traditional hydraulic nuts have poor stability after the top of the extension head is extended, especially when used in coal mining sites where dust can easily cause the extension head to deviate, resulting in thread misalignment or stripping, which reduces the effectiveness and lifespan of the hydraulic nut. In addition, the use of an external fixing collar requires the extension head to be extended before fixing, which reduces the fixing effect of the extension head and makes subsequent disassembly and assembly time-consuming and laborious.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a hydraulic nut for coal mining machinery, comprising: a nut body and a tensioning head, and further comprising:

[0006] A positioning component is disposed on the outer surface of the nut body, and the positioning component includes:

[0007] An annular plate is fixedly disposed at the lower end of the outer surface of the nut body;

[0008] An annular groove is formed on the outer surface of the annular plate;

[0009] The annular plate is movably disposed inside the annular groove and can rotate inside the annular groove;

[0010] A sealing component is located inside the nut body.

[0011] Preferably, the positioning component further includes:

[0012] Both connecting blocks are fixedly mounted on the outer surface of the annular plate, and the two connecting blocks are symmetrical to each other;

[0013] A through hole is formed on the outer surface of the connecting block;

[0014] Two connecting plates are fixedly mounted on the bottom outer surface of the stretching head, and the two connecting plates are symmetrical to each other;

[0015] Both positioning rods are fixedly mounted on the outer surface of the connecting plate, and both positioning rods are movably mounted inside the through hole;

[0016] The positioning rod can slide longitudinally inside the through hole.

[0017] The technical effect of adopting the above-mentioned further solution is that the positioning rod can improve the stability of the tensioning head, prevent the tensioning head from being skewed or misaligned, and make the tensioning head more stably sleeved on the screw.

[0018] Preferably, the sealing assembly includes:

[0019] The piston is fixedly mounted on the outer surface of the stretching head;

[0020] A sealing ring is fixedly installed on the top of the piston;

[0021] Two semi-circular ring gaskets are movably mounted on the outer surface of the stretching head.

[0022] The technical effect of adopting the above-mentioned further solution is that the sealing ring can improve the sealing performance and prevent hydraulic oil from leaking from the hydraulic oil tank.

[0023] Preferably, a hydraulic oil groove is provided at the bottom of the nut body, and the sealing ring and piston are both movably disposed inside the hydraulic oil groove.

[0024] The technical effect of adopting the above-mentioned further solution is that it facilitates the entry of hydraulic oil into the hydraulic oil tank during pressurization, thereby driving the piston to move.

[0025] Preferably, an oil inlet is provided on one side of the top outer surface of the nut body, and an oil drain is provided on the other side of the top outer surface of the nut body. Both the oil inlet and the oil drain are connected to the hydraulic oil tank.

[0026] The technical effect of adopting the above-mentioned further solution is that hydraulic oil enters the interior of the hydraulic oil tank through the oil inlet, and the pressurization pushes the sealing ring and piston to move inside the hydraulic oil tank.

[0027] Preferably, both the nut body and the tensioning head have threaded grooves inside.

[0028] The technical effect of adopting the above-mentioned further solution is that the nut body and the tensioning head can be installed on the screw through the threaded groove.

[0029] Preferably, a limit block is fixedly provided at the top of each of the two positioning rods to limit the positioning rods.

[0030] The technical effect of adopting the above-mentioned further solution is that the limiting block can prevent the positioning rod from detaching from the through hole.

[0031] Preferably, a connector is fixedly provided on the outer surface of the nut body near the oil inlet, and a vent valve is fixedly provided on the outer surface of the nut body near the oil drain.

[0032] The technical effect of adopting the above-mentioned further solution is that the connector is connected to the pump body, the pressure is increased through the connector, and the pressure is reduced through the vent valve, so that the nut body is connected to the screw through the threaded groove.

[0033] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0034] 1. In this utility model, when the stretching head extends through the piston, the two positioning rods slide inside the through holes on the outer surface of the connecting block. As the stretching head is adjusted up and down, the positioning rods can improve the stability of the stretching head and prevent it from tilting or misaligning, making the stretching head more stably fitted onto the screw. When the stretching head rotates, it drives the positioning rods to rotate through the connecting plate. The positioning rods drive the annular plate to rotate inside the annular groove through the connecting block. Therefore, the adjustment of the stretching head is not affected by the positioning rods, which improves the installation efficiency of the stretching head. The limiting block fixedly installed on the top of the positioning rod can prevent the positioning rod from detaching from the through hole.

[0035] 2. In this utility model, the connector is connected to the pump body. The connector is used to pressurize the hydraulic oil, which enters the hydraulic oil tank through the inlet. The pressurization pushes the sealing ring and piston to move inside the hydraulic oil tank, thereby causing the top of the tensioning head to extend. The sealing ring can improve the sealing performance and prevent hydraulic oil from leaking from the hydraulic oil tank. Then, the gap between the tensioning head and the nut body is measured, and a suitable semi-circular washer is inserted into the gap between the tensioning head and the nut body. The pressure is reduced by the vent valve, so that the nut body is connected to the screw through the threaded groove. Attached Figure Description

[0036] Figure 1 This utility model provides a structural schematic diagram of a hydraulic nut for coal mining machinery;

[0037] Figure 2 This utility model provides a side view of a hydraulic nut for coal mining machinery.

[0038] Figure 3 This utility model provides an exploded structural diagram of a hydraulic nut for coal mining machinery.

[0039] Figure 4This utility model provides a cross-sectional structural diagram of a hydraulic nut for coal mining machinery.

[0040] Legend:

[0041] 1. Nut body; 101. Connector; 102. Air release valve; 103. Annular plate; 104. Circular plate; 105. Pulling head; 106. Connecting block; 107. Connecting plate; 108. Limiting block; 109. Threaded groove; 110. Annular groove; 111. Positioning rod; 112. Semi-circular ring washer; 113. Sealing ring; 114. Oil inlet; 115. Oil drain; 116. Hydraulic oil groove; 117. Piston; 118. Through hole. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0044] Example 1, as Figure 1-4 As shown, this utility model provides a hydraulic nut for coal mining machinery, including: a nut body 1, a tensioning head 105, a positioning component, and a sealing component;

[0045] The positioning assembly includes: an annular plate 103 fixedly installed on the lower end of the outer surface of the nut body 1; an annular groove 110 is opened on the outer surface of the annular plate 103; a circular plate 104 is movably embedded in the annular groove 110; two connecting blocks 106 are fixedly installed on the outer surface of the circular plate 104; each of the two connecting blocks 106 has a through hole 118 on its outer surface; two connecting plates 107 are fixedly installed on the bottom outer surface of the tension head 105; positioning rods 111 are fixedly installed on the top of each of the two connecting plates 107; the positioning rods 111 are movably embedded in the through hole 118; and a limit block 108 is fixedly installed on the top of the positioning rods 111.

[0046] In this embodiment, when the stretching head 105 is extended by the piston 117, the two positioning rods 111 slide inside the through hole 118 on the outer surface of the connecting block 106. As the stretching head 105 is adjusted up and down, the positioning rods 111 can improve the stability of the stretching head 105 and prevent the stretching head 105 from being skewed or misaligned, so that the stretching head 105 is more stably sleeved on the screw. When the stretching head 105 rotates, it drives the positioning rods 111 to rotate through the connecting plate 107. The positioning rods 111 drive the annular plate 104 to rotate inside the annular groove 110 through the connecting block 106. Therefore, the stretching head 105 is not affected by the positioning rods 111 when it is adjusted, which improves the installation efficiency of the stretching head 105. The limiting block 108 fixedly installed on the top of the positioning rod 111 can prevent the positioning rod 111 from detaching from the through hole 118.

[0047] Example 2, as Figure 1-4 As shown, the sealing assembly includes: a hydraulic oil groove 116 is provided at the bottom of the nut body 1, a sealing ring 113 is movably embedded inside the hydraulic oil groove 116, a piston 117 is fixedly installed at the bottom of the sealing ring 113, the piston 117 is fixedly installed at the top of the tension head 105, an oil inlet 114 is provided on one side of the top outer surface of the nut body 1, and an oil drain 115 is provided on the other side. Both the oil inlet 114 and the oil drain 115 are connected to the hydraulic oil groove 116. A connector 101 is fixedly installed on the outer surface of the nut body 1 near the oil inlet 114, and a vent valve 102 is fixedly installed on the outer surface of the nut body 1 near the oil drain 115.

[0048] In this embodiment, connector 101 is connected to the pump body. The hydraulic oil is pressurized through connector 101 and enters the hydraulic oil groove 116 through the oil inlet 114. The pressurization pushes the sealing ring 113 and piston 117 to move inside the hydraulic oil groove 116, thereby causing the tension head 105 to extend. The sealing ring 113 can improve the sealing performance and prevent the hydraulic oil from leaking from the hydraulic oil groove 116. Then, the gap between the tension head 105 and the nut body 1 is measured, and a suitable semi-circular ring washer 112 is inserted into the gap between the tension head 105 and the nut body 1. The pressure is reduced through the vent valve 102, so that the nut body 1 is connected to the screw through the thread groove 109.

[0049] Working principle: When the stretching head 105 is pushed out by the piston 117, the two positioning rods 111 slide inside the through hole 118 on the outer surface of the connecting block 106. As the stretching head 105 is adjusted up and down, the positioning rods 111 can improve the stability of the stretching head 105 and prevent the stretching head 105 from being tilted or misaligned, so that the stretching head 105 is more stably sleeved on the screw. When the stretching head 105 rotates, it drives the positioning rods 111 to rotate through the connecting plate 107. The positioning rods 111 drive the annular plate 104 to rotate inside the annular groove 110 through the connecting block 106. Therefore, the stretching head 105 is not affected by the positioning rods 111 when it is adjusted, which improves the installation efficiency of the stretching head 105. The limiting block 108 fixedly installed on the top of the positioning rods 111 can prevent the positioning rods 111 from detaching from the through hole 118.

[0050] Connector 101 is connected to the pump body. Hydraulic oil is pressurized through connector 101 and enters the hydraulic oil groove 116 through inlet 114. The pressurization pushes the sealing ring 113 and piston 117 to move inside the hydraulic oil groove 116, thereby causing the tension head 105 to extend. The sealing ring 113 can improve the sealing performance and prevent hydraulic oil from leaking from the hydraulic oil groove 116. Then, the gap between the tension head 105 and the nut body 1 is measured, and a suitable semi-circular ring washer 112 is inserted into the gap between the tension head 105 and the nut body 1. The pressure is reduced through the vent valve 102, so that the nut body 1 is connected to the screw through the thread groove 109.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A hydraulic nut for coal mining machinery, comprising: The nut body (1) and the tensioning head (105) are characterized in that they further include: A positioning component is disposed on the outer surface of the nut body (1), and the positioning component includes: An annular plate (103) is fixedly disposed at the lower end of the outer surface of the nut body (1); An annular groove (110) is formed on the outer surface of the annular plate (103); The annular plate (104) is movably disposed inside the annular groove (110) and can rotate inside the annular groove (110); A sealing component is located inside the nut body (1).

2. The hydraulic nut for coal mining machinery according to claim 1, characterized in that: The positioning components also include: Two connecting blocks (106) are fixedly disposed on the outer surface of the annular plate (104), and the two connecting blocks (106) are symmetrical to each other; A through hole (118) is formed on the outer surface of the connecting block (106); Two connecting plates (107) are fixedly disposed on the bottom outer surface of the stretching head (105), and the two connecting plates (107) are symmetrical to each other; Two positioning rods (111) are fixedly disposed on the outer surface of the connecting plate (107), and both positioning rods (111) are movably disposed inside the through hole (118); The positioning rod (111) can slide longitudinally inside the through hole (118).

3. A hydraulic nut for coal mining machinery according to claim 1, characterized in that: The sealing assembly includes: The piston (117) is fixedly disposed on the outer surface of the stretching head (105); A sealing ring (113) is fixedly disposed on the top of the piston (117); Two semi-circular ring gaskets (112) are movably disposed on the outer surface of the stretching head (105).

4. A hydraulic nut for coal mining machinery according to claim 3, characterized in that: The bottom of the nut body (1) is provided with a hydraulic oil groove (116), and the sealing ring (113) and piston (117) are both movably arranged inside the hydraulic oil groove (116).

5. A hydraulic nut for coal mining machinery according to claim 1, characterized in that: An oil inlet (114) is provided on one side of the top outer surface of the nut body (1), and an oil drain (115) is provided on the other side of the top outer surface of the nut body (1). Both the oil inlet (114) and the oil drain (115) are connected to the hydraulic oil tank (116).

6. A hydraulic nut for coal mining machinery according to claim 1, characterized in that: Both the nut body (1) and the tension head (105) have threaded grooves (109) inside.

7. A hydraulic nut for coal mining machinery according to claim 2, characterized in that: Limiting blocks (108) are fixedly provided on the top of both positioning rods (111) to limit the positioning rods (111).

8. A hydraulic nut for coal mining machinery according to claim 1, characterized in that: A connector (101) is fixedly provided on the outer surface of the nut body (1) near the oil inlet (114), and a vent valve (102) is fixedly provided on the outer surface of the nut body (1) near the oil drain (115).

Images