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CN-224229065-U - Hydraulic nut for coal mine machinery

CN224229065UCN 224229065 UCN224229065 UCN 224229065UCN-224229065-U

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, a stretching head and a positioning assembly, wherein the positioning assembly is arranged on the outer surface of the nut main body and comprises an annular plate fixedly arranged at the lower end of the outer surface of the nut main body, an 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 a piston top, two positioning rods slide in a through hole formed in the outer surface of a connecting block, the positioning rods can be adjusted up and down along with the stretching head, the stability of the stretching head can be improved, the stretching head is prevented from being deviated and misplaced, the stretching head is enabled to be sleeved on a screw rod more stably, the positioning rods are driven to rotate through a connecting plate when the stretching head rotates, the annular plate is driven to rotate in the annular groove through the connecting block, the stretching head is not influenced by the positioning rods when being adjusted, and the mounting efficiency of the stretching head is improved.

Inventors

  • ZHANG JING
  • SUN HAIYUN
  • GU XULIANG

Assignees

  • 嘉兴紫云精密科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250610

Claims (8)

  1. 1. The hydraulic nut for the coal mine machinery comprises a nut main body (1) and a stretching head (105), and is characterized by further comprising: the locating component, set up in the surface of nut main part (1), the locating component includes: The annular plate (103) is fixedly arranged at the lower end of the outer surface of the nut main body (1); an annular groove (110) which is formed on the outer surface of the annular plate (103); the annular plate (104) is movably arranged in the annular groove (110) and can rotate in the annular groove (110); And a seal assembly provided in the nut body (1).
  2. 2. The hydraulic nut for coal mine machinery of claim 1, wherein the positioning assembly further comprises: the two connecting blocks (106) are fixedly arranged on the outer surface of the annular plate (104), and the two connecting blocks (106) are symmetrical; the through hole (118) is formed in the outer surface of the connecting block (106); the two connecting plates (107) are fixedly arranged on the outer surface of the bottom of the stretching head (105), and the two connecting plates (107) are symmetrical; The two positioning rods (111) are fixedly arranged on the outer surface of the connecting plate (107), and the two positioning rods (111) are movably arranged in the through holes (118); the positioning rod (111) can longitudinally slide in the through hole (118).
  3. 3. The hydraulic nut for coal mine machinery according to claim 1, wherein the seal assembly comprises: A piston (117) fixedly provided on the outer surface of the stretching head (105); a seal ring (113) fixedly arranged on the top of the piston (117); two semicircular gaskets (112) are movably arranged on the outer surface of the stretching head (105).
  4. 4. The hydraulic nut for coal mine machinery according to claim 3, wherein the hydraulic oil groove (116) is formed in the bottom of the nut body (1), and the sealing ring (113) and the piston (117) are movably arranged in the hydraulic oil groove (116).
  5. 5. The hydraulic nut for coal mine machinery according to claim 1, wherein an oil inlet (114) is formed in one side of the outer surface of the top of the nut body (1), an oil drain port (115) is formed in the other side of the outer surface of the top of the nut body (1), and the oil inlet (114) and the oil drain port (115) are communicated with a hydraulic oil groove (116).
  6. 6. The hydraulic nut for coal mine machinery according to claim 1, wherein the nut body (1) and the stretching head (105) are provided with screw grooves (109) inside.
  7. 7. The hydraulic nut for coal mine machinery according to claim 2, wherein limiting blocks (108) are fixedly arranged at the tops of the two positioning rods (111), and the positioning rods (111) can limit.
  8. 8. The hydraulic nut for coal mine machinery according to claim 1, wherein a joint (101) is fixedly arranged on the outer surface of the nut body (1) close to the oil inlet (114), and a deflation valve (102) is fixedly arranged on the outer surface of the nut body (1) close to the oil drain port (115).

Description

Hydraulic nut for coal mine machinery Technical Field The utility model relates to the technical field of hydraulic nuts, in particular to a hydraulic nut for coal mine machinery. Background The hydraulic nut is a high-precision and high-strength connecting element which is fastened by utilizing a hydraulic principle, and is widely applied to heavy machinery equipment which needs high pretightening force and high reliability. The hydraulic pressure stretching bolt can uniformly fasten and lock the connecting part, and is an advanced fastening solution which is difficult to replace by a traditional spanner or a torque tool. But in prior art, traditional hydraulic nut stretching head top stability after stretching out is relatively poor, especially uses in colliery exploitation place, and the dust is great makes stretching head skew easily to the condition that appears screw dislocation or smooth silk has reduced hydraulic nut's result of use and life-span, adopts external fixed lantern ring moreover, then needs stretching head top to stretch out the back and fix again, consequently can reduce stretching head's fixed effect, and later stage dismouting is all more time consuming laborious. Disclosure of utility model The utility model aims to solve the problems that in the prior art, the stability of the stretching head top of the traditional hydraulic nut after stretching out is poor, particularly in coal mining places, the stretching head is easy to deflect due to larger dust, so that screw dislocation or slipping occurs, the service effect and the service life of the hydraulic nut are reduced, and an external fixing lantern ring is adopted, so that the stretching head top is required to stretch out and then be fixed, the fixing effect of the stretching head is reduced, and later disassembly and assembly are time-consuming and labor-consuming. In order to achieve the purpose, the hydraulic nut for the coal mine machinery adopts the following technical scheme that the hydraulic nut comprises a nut main body and a stretching head, and further comprises: The locating component, set up in the surface of nut main part, the locating component includes: The annular plate is fixedly arranged at the lower end of the outer surface of the nut main body; an annular groove formed on the outer surface of the annular plate; the annular plate is movably arranged in the annular groove and can rotate in the annular groove; And the sealing assembly is arranged in the nut main body. Preferably, the positioning assembly further comprises: The two connecting blocks are fixedly arranged on the outer surface of the annular plate and are symmetrical; the through hole is formed in the outer surface of the connecting block; the two connecting plates are fixedly arranged on the outer surface of the bottom of the stretching head and are symmetrical; The two positioning rods are fixedly arranged on the outer surface of the connecting plate and are movably arranged in the through holes; the locating rod can longitudinally slide in the through hole. The technical effect of adopting the further scheme is that the positioning rod can improve the stability of the stretching head, prevent the stretching head from deflection dislocation, and enable the stretching head to be sleeved on the screw more stably. Preferably, the seal assembly comprises: the piston is fixedly arranged on the outer surface of the stretching head; The sealing ring is fixedly arranged at the top of the piston; The two semicircular gaskets are movably arranged on the outer surface of the stretching head. The technical effect of adopting the further scheme is that the sealing ring can improve the tightness and prevent hydraulic oil from leaking from the hydraulic oil groove. Preferably, the bottom of nut main part has seted up hydraulic oil groove, sealing washer and piston all activity set up the inside at hydraulic oil groove. The technical effect of adopting the further scheme is that hydraulic oil enters the hydraulic oil groove when pressurization is convenient, so that the piston is pushed to move. Preferably, an oil inlet is formed in one side of the outer surface of the top of the nut body, an oil drain port is formed in the other side of the outer surface of the top of the nut body, and the oil inlet and the oil drain port are both communicated with the hydraulic oil tank. The technical effect of adopting the further scheme is that hydraulic oil enters the hydraulic oil groove through the oil inlet, and the sealing ring and the piston are pushed to move in the hydraulic oil groove by pressurization. Preferably, the nut body and the stretching head are provided with thread grooves inside. The technical effect of adopting the further scheme is that the nut main body and the stretching head can be arranged on the screw rod through the thread groove. Preferably, the top of two locating rods is fixedly provided with a limiting block, and the locating rods can be limite