Wear-resistant bolt assembly

Abstract

The utility model relates to the technical field of bolts, in particular to a wear-resistant bolt assembly which comprises a bolt, the bolt needs to be matched with a nut sleeve for use when being fixed, a bolt groove is formed in the nut sleeve, a thread ring is fixedly connected to the inner wall of the bolt groove, and a plurality of thread grooves which are evenly distributed at equal intervals are formed in the inner wall of the thread ring. A threaded groove is formed in the nut sleeve, the threaded groove is in threaded connection to the outer wall of the bolt, a cavity is formed in the nut sleeve, an oiling mechanism used for adding lubricating oil to the joint of the bolt and the threaded groove is arranged in the cavity, the oiling mechanism comprises a rebound bag, the rebound bag is fixedly connected to the interior of the cavity, and the rebound bag is round. Compared with the prior art, abrasion generated by direct metal contact between the bolt and the nut sleeve can be remarkably reduced, the connection reliability is improved, friction resistance in the screwing process can be reduced, torque loss is reduced, the pre-tightening force precision is guaranteed, and good practical value and popularization significance are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt technical field especially relates to a wear -resisting bolt assembly. BACKGROUND

[0002] Bolt and nut as common matched fastener, are widely used in mechanical equipment, building structure, vehicle system, bridge construction and electronic assembly etc. multiple industrial fields, are one of basic elements that realize detachable connection between parts. Through the thread engagement between bolt and nut, can tightly compress under the action of external force multiple structural members, form firm axial connection, thereby guarantee the stability and reliability of structure whole. Because its assembly is convenient, connection strength is high, is convenient for post -periodic dismounting maintenance's characteristics, bolt and nut combination in industrial manufacturing and assembly link has irreplaceable function.

[0003] In prior art, part assembly operation does not coat lubricating oil on bolt and nut thread surface, or cannot add lubricant in time when dismounting and fixing, and this connection mode used under the state of no lubrication can cause the following problems: on the one hand, direct dry friction between metals causes thread to wear quickly, reduces fastening reliability, on the other hand, larger frictional resistance can make bolt produce torque loss in tightening process, influence pre-tightening force accuracy, further cause looseness, slip tooth and other faults, in addition, long -term dry friction can also cause bolt and nut to be " stuck " or jammed, bring great difficulty to subsequent dismounting maintenance, reduce the service life of bolt. SUMMARY

[0004] Therefore, the utility model discloses a kind of wear-resistant bolt assemblies to solve the connection mode used under the state of no lubrication, on the one hand, direct dry friction between metals causes thread to wear quickly, reduces fastening reliability, also make bolt produce torque loss in tightening process, reduce the service life of bolt.

[0005] Based on the above purpose, the utility model provides a kind of wear-resistant bolt assemblies, including bolt, the bolt needs to use nut sleeve when fixed, the inside of the nut sleeve is equipped with bolt slot, the inner wall of the bolt slot is fixedly connected with a circle of thread circle, the inner wall of the thread circle is equipped with a plurality of equidistantly evenly distributed thread grooves, the thread groove is threadedly connected on the outer wall of bolt, the inside of the nut sleeve is equipped with cavity, the inside of the cavity is provided with the oiling mechanism for adding lubricating oil to bolt and thread groove junction.

[0006] Preferably, the oiling mechanism comprises a rebounding bag fixedly connected inside the cavity, the rebounding bag is circular in shape, press blocks for extruding the rebounding bag are arranged on both sides of the top of the rebounding bag, press rods are fixedly connected to the top of each of the two press blocks, the top of each of the press rods is slidably penetrated through the outer wall of the nut sleeve, a press plate is fixedly connected between the top ends of the two press rods, four first oil outlets are communicated with the top of the rebounding bag, one end of each of the four first oil outlets is penetrated through the inside of the bolt slot and is located on the top of the thread ring, four second oil outlets are communicated with the bottom of the rebounding bag, and one end of each of the four second oil outlets is penetrated through the inside of the bolt slot and is located on the bottom of the thread ring.

[0007] Preferably, four oil flow grooves for flowing lubricating oil to the other end of the thread ring are formed in the inner wall of the thread ring.

[0008] Preferably, an oil inlet nozzle is fixedly connected to the top of the rebounding bag, and the top end of the oil inlet nozzle is penetrated through the top of the nut sleeve.

[0009] Preferably, slopes for guiding oil to flow to the bolt direction when the first oil outlets and the second oil outlets spray oil are formed in both ends of the thread ring.

[0010] Preferably, the press plate is semicircular in shape.

[0011] Preferably, the end of the first oil outlet close to the inside of the rebounding bag extends to the bottom of the inner wall of the rebounding bag.

[0012] Preferably, the outer wall of the bolt and the inner wall of the thread ring are matched with each other.

[0013] The utility model discloses the beneficial effects of the following:

[0014] The wear-resistant bolt, the oiling mechanism is through setting press plate, press rod, press block, rebounding bag, first oil outlet, second oil outlet, thread ring and oil flow groove, realizes in the process of dismounting or installing bolt and nut sleeve, can fast, accurate with lubricating oil delivery to threaded connection part, effectively overcome the dry friction problem caused by the fact that the threaded surface is not coated with lubricant or lubricating oil cannot be added in time in the prior art, the structure can reduce the wear and tear between the bolt and the nut sleeve caused by the direct contact of the metal, improve the connection reliability, prolong the service life on one hand, on the other hand, can reduce the friction resistance in the tightening process, reduce the torque loss, guarantee the pre-tightening force accuracy, avoid the threaded tooth slipping, loosening or seizing and other phenomena, thereby improve the overall assembly efficiency and the post-maintenance convenience, have good practical value and popularization significance. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only illustrate the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0016] Figure 1 It is a whole three-dimensional structure schematic diagram of the present application.

[0017] Figure 2 It is a nut sleeve three-dimensional structure schematic diagram of the present application.

[0018] Figure 3 It is a thread ring and cavity three-dimensional structure schematic diagram of the present application.

[0019] Figure 4 It is an oil flow groove and pressing plate three-dimensional structure schematic diagram of the present application.

[0020] Figure 5 It is a first oil outlet pipe and second oil outlet pipe three-dimensional structure schematic diagram of the present application.

[0021] In the figure, the marks are:

[0022] 1, bolt; 2, nut sleeve; 3, bolt groove; 4, thread ring; 5, thread groove; 6, cavity; 7, rebounding bag; 8, pressing block; 9, pressing rod; 10, pressing plate; 11, first oil outlet pipe; 12, second oil outlet pipe; 13, oil flow groove; 14, oil inlet nozzle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will further describe the present application in combination with specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the usual meaning by those skilled in the art. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] As Figures 1 to 5 shown, a wear-resistant bolt assembly, comprising a bolt 1, which needs to be used in cooperation with a nut sleeve 2 when fixed, a bolt slot 3 is opened in the inside of the nut sleeve 2, a thread ring 4 is fixedly connected to the inner wall of the bolt slot 3, the outer wall of the bolt 1 and the inner wall of the thread ring 4 are matched with each other, a plurality of equidistantly and uniformly distributed thread grooves 5 are opened in the inner wall of the thread ring 4, the thread grooves 5 are threadedly connected on the outer wall of the bolt 1, a cavity 6 is opened in the inside of the nut sleeve 2, and an oiling mechanism for adding lubricating oil to the connection between the bolt 1 and the thread groove 5 is arranged in the inside of the cavity 6.

[0026] Further, referring to the drawings Figures 1 to 5 shown, the oiling mechanism comprises a rebounding capsule 7, which is fixedly connected in the inside of the cavity 6, the shape of the rebounding capsule 7 is circular, press blocks 8 for extruding the rebounding capsule 7 are placed on the top of both sides of the rebounding capsule 7, press rods 9 are fixedly connected to the top of each of the two press blocks 8, the top of each of the two press rods 9 is slidably penetrated out of the outer wall of the nut sleeve 2, a pressing plate 10 is fixedly connected between the top ends of the two press rods 9, four first oil outlet pipes 11 are communicated with the top of the rebounding capsule 7, one end of each of the four first oil outlet pipes 11 is penetrated into the inside of the bolt slot 3 and is located on the top of the thread ring 4, four second oil outlet pipes 12 are communicated with the bottom of the rebounding capsule 7, one end of each of the four second oil outlet pipes 12 is penetrated into the inside of the bolt slot 3 and is located on the bottom of the thread ring 4, and four oil flow grooves 13 for flowing lubricating oil into the other end of the thread ring 4 are opened in the inner wall of the thread ring 4.

[0027] When the oiling mechanism needs to be used, the operator can press the pressing plate 10 arranged on the device by hand before disassembling or assembling the bolt 1 and the nut sleeve 2, the pressing plate 10 moves downward under the action of external force and drives the press rods 9 connected at both ends thereof to slide downward, and the press rods 9 further drive the press blocks 8 at the lower ends thereof to move downward synchronously.

[0028] When the press blocks 8 move downward, compression is generated on the rebounding capsule 7 arranged below the press blocks 8, in the compression process, the lubricating oil stored in the rebounding capsule 7 is forced to extrude and enter the first oil outlet pipes 11 and the second oil outlet pipes 12, at this time, the lubricating oil discharged in the first oil outlet pipes 11 and the second oil outlet pipes 12 will drop onto the surfaces of both ends of the thread ring 4.

[0029] Since the structure of the thread ring 4 is designed to be inclined to the bolt 1, the lubricating oil dropped on the top of the thread ring 4 will flow to the connection position of the thread ring 4 and the bolt 1, when the thread ring 4 is rotated, the lubricating oil will be uniformly distributed and applied to the outer wall of the bolt 1, effectively reducing the dry friction phenomenon on the surface thereof.

[0030] Meanwhile, part of the lubricating oil will flow into the oil flow groove 13 provided above the threaded ring 4 before completely entering the threaded connection position, and then guide the lubricating oil to penetrate the joint between the threaded ring 4 and the bolt 1 again, further improving the lubricating effect.

[0031] The oiling mechanism sets the pressing plate 10, the pressing rod 9, the pressing block 8, the rebounding bag 7, the first oil outlet pipe 11, the second oil outlet pipe 12, the threaded ring 4, and the oil flow groove 13, etc., which can quickly and accurately deliver lubricating oil to the threaded connection position during the disassembly or installation of the bolt 1 and the nut sleeve 2, effectively overcoming the dry friction problem caused by the lack of lubricant on the threaded surface or the inability to add lubricating oil in time in the prior art. On the one hand, this structure can significantly reduce the wear between the bolt 1 and the nut sleeve 2 caused by direct metal contact, improve the connection reliability, prolong the service life, on the other hand, it can reduce the friction resistance during tightening, reduce the torque loss, ensure the pre-tightening force accuracy, avoid the phenomenon of thread slipping, loosening or "stuck", etc., thereby improving the overall assembly efficiency and post-maintenance convenience, having good practical value and popularization significance.

[0032] Further, referring to the accompanying drawings Figure 3 As shown, the top of the rebounding bag 7 is fixedly connected with an oil inlet nozzle 14, the top end of the oil inlet nozzle 14 penetrates the top of the nut sleeve 2, and the setting of the oil inlet nozzle 14 allows the lubricating oil to be added into the rebounding bag 7 and directly added into the top of the threaded ring 4.

[0033] Further, referring to the accompanying drawings Figure 3 As shown, the threaded ring 4 is provided with a slope at both ends for guiding the oil to flow in the direction of the bolt 1 when the first oil outlet pipe 11 and the second oil outlet pipe 12 spray oil, and the slope allows the lubricating liquid to fully contact the connection between the bolt 1 and the threaded ring 4.

[0034] Further, referring to the accompanying drawings Figure 2 As shown, the pressing plate 10 is semicircular in shape, which allows the two pressing rods 9 to be pressed at the same time without hindering the bolt 1 from penetrating into the bolt groove 3.

[0035] Further, referring to the accompanying drawings Figure 5 As shown, the first oil outlet pipe 11 extends into the inner wall bottom of the rebounding bag 7 at the end close to the inside of the rebounding bag 7, which allows the oil to flow out of the first oil outlet pipe 11 and the second oil outlet pipe 12 when the rebounding bag 7 is pressed, and also avoids the situation that the oil cannot flow out of the first oil outlet pipe 11 when the oil is less.

[0036] Those skilled in the art will understand that the above discussion of any of the embodiments is merely exemplary in nature and is not intended to imply that the scope of the present application, including the claims, is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

[0037] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications and variations are intended to be encompassed by the appended claims.

Claims

1. A wear resistant bolt assembly comprising a bolt (1) which, when fixed, requires the use of a nut sleeve (2) for cooperation, characterized in that: The nut sleeve (2) is internally provided with a bolt slot (3), the inner wall of the bolt slot (3) is fixedly connected with a thread ring (4), the inner wall of the thread ring (4) is provided with a plurality of equidistantly and uniformly distributed thread grooves (5), the thread grooves (5) are threadedly connected on the outer wall of the bolt (1), the nut sleeve (2) is internally provided with a cavity (6), and the cavity (6) is internally provided with an oiling mechanism for adding lubricating oil to the connection between the bolt (1) and the thread groove (5).

2. A wear-resistant bolt assembly according to claim 1, wherein The oiling mechanism comprises a rebound capsule (7) fixedly connected in the cavity (6), the rebound capsule (7) is annular in shape, press blocks (8) for extruding the rebound capsule (7) are arranged on the top of the rebound capsule (7), press rods (9) are fixedly connected to the top of the two press blocks (8), the press rods (9) are slidably penetrated out of the outer wall of the nut sleeve (2), a press plate (10) is fixedly connected between the top ends of the two press rods (9), four first oil outlet pipes (11) are communicated with the top of the rebound capsule (7), one end of each of the four first oil outlet pipes (11) is penetrated into the bolt slot (3) and located on the top of the thread ring (4), four second oil outlet pipes (12) are communicated with the bottom of the rebound capsule (7), and one end of each of the four second oil outlet pipes (12) is penetrated into the bolt slot (3) and located on the bottom of the thread ring (4).

3. A wear-resistant bolt assembly according to claim 2, wherein, The inner wall of the thread ring (4) is provided with four oil flow grooves (13) for flowing lubricating oil into the other end of the thread ring (4).

4. A wear-resistant bolt assembly according to claim 2, wherein The top of the rebound capsule (7) is fixedly connected with an oil inlet nozzle (14), and the top end of the oil inlet nozzle (14) is penetrated through the top of the nut sleeve (2).

5. A wear-resistant bolt assembly according to claim 2, wherein The two ends of the thread ring (4) are provided with slopes for guiding the oil to flow towards the bolt (1) when the first oil outlet pipes (11) and the second oil outlet pipes (12) spray oil.

6. A wear-resistant bolt assembly according to claim 2, wherein The press plate (10) is semicircular in shape.

7. A wear-resistant bolt assembly according to claim 2, wherein The end of the first oil outlet pipe (11) close to the inside of the rebound capsule (7) extends to the bottom of the inner wall of the rebound capsule (7).

8. A wear-resistant bolt assembly according to claim 1, wherein The outer wall of the bolt (1) and the inner wall of the thread ring (4) are matched with each other.

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