CN114952684A

CN114952684A - Sleeve for flat joint nut

Info

Publication number: CN114952684A
Application number: CN202210506737.5A
Authority: CN
Inventors: 黄观林; 陶冬冬
Original assignee: Dongfeng Liuzhou Motor Co Ltd
Current assignee: Dongfeng Liuzhou Motor Co Ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-08-30

Abstract

The invention belongs to the technical field of automobile assembling tools, and particularly discloses a sleeve for a flat joint nut, which comprises: the sleeve comprises a sleeve body and a thimble; the sleeve body is provided with a clamping end and a mounting end; the clamping end is provided with a first caliper and a second caliper, the first caliper is provided with a first clamping surface, and the second caliper is provided with a second clamping surface; a clamping groove is formed between the first clamping surface and the second clamping surface; the thimble sets up in the joint inslot. The mounting end can be connected with a pneumatic trigger or a torque wrench, when the sleeve body rotates, the first caliper and the second caliper transmit the same torque to the flat joint nut, the two side edges of the flat joint nut are guaranteed to be equal in screwing torque, torque deviation caused by screwing by an adjustable wrench is reduced, the assembly precision of the flat joint nut is improved, the assembly quality is improved, and the assembly stability of the steering knuckle is improved; moreover, the sleeve for the flat joint nut can realize quick clamping, positioning and centering, can accelerate the screwing speed and the assembling speed of the flat joint nut, and improves the assembling efficiency.

Description

Sleeve for flat joint nut

Technical Field

The invention relates to the technical field of automobile assembling tools, in particular to a sleeve for a flat joint nut.

Background

The traditional anti-loosening mode of the steering knuckle assembly adjusting nut is a slotted nut and split pin structure, and because the slotted nut structure has the structural defect that the torque control is not accurate, in order to overcome the defect, part of enterprises change split pin anti-loosening into a bolt clamping anti-loosening mode (an adjusting nut body wipes oil in a longitudinal groove, and the adjusting nut is clamped through a bolt to realize anti-loosening). Due to the change of the nut structure, in order to realize locking and looseness prevention of the bolt, the mode of adjusting the nut joint is changed from an outer hexagonal joint mode to a flat joint mode (the flat joint is used for designing a bolt assembly plane and a bolt hole). Because the flat joint nut is an asymmetric nonstandard part, the existing tool cannot realize rotary screwing, needs to be screwed by an adjustable wrench manually during assembly, is limited by assembly space, assembly skills of workers and the like, and cannot control the assembly precision and the assembly quality of each flat joint nut during assembly. Because of unable use current rotatable sleeve, unable pneumatic, electric tool and torque wrench of use lead to assembly quality poor, assembly efficiency low, be unfavorable for the large-scale manufacturing production.

Disclosure of Invention

The purpose of the invention is: the sleeve for the flat joint nut is provided to solve the technical problems that the assembly precision is low, the assembly stability is poor, the quality is uncontrollable, the assembly efficiency is low and the like due to the fact that the steering knuckle flat joint nut in the prior assembly technology can only adopt a backward process method of manual assembly.

In order to achieve the above object, the present invention provides a sleeve for a flat union nut exclusively used for matching a flat union nut, comprising: the sleeve comprises a sleeve body and a thimble; the sleeve body is provided with a clamping end and an installation end; the clamping end is provided with a first caliper and a second caliper, the first caliper is provided with a first clamping surface parallel to the length direction of the sleeve body, and the second caliper is provided with a second clamping surface parallel to the length direction of the first clamping surface; a clamping groove is formed between the first clamping surface and the second clamping surface; the thimble is arranged in the clamping groove, the length direction of the thimble is parallel to the length direction of the sleeve body, and the rotating shaft of the sleeve body is coaxial with the center shaft of the thimble.

Preferably, the rotation center of the clamping end is provided with a mounting hole, and the thimble is arranged in the mounting hole.

Preferably, the inside of sleeve body is provided with the intercommunication the telescopic hole of mounting hole, the thimble is provided with and stretches into the end of stretching into of telescopic hole, the telescopic hole is downthehole to have a top push face, top push face with stretch into and have between the end and be used for the drive the thimble is followed the length direction of sleeve body removes reset return spring.

Preferably, the extending end is provided with a containing hole, one end of the return spring is abutted to the blind end of the containing hole, and the other end of the return spring is abutted to the pushing surface.

Preferably, the mounting end is provided with a mounting groove recessed toward the card end.

Preferably, the sleeve for a flat union nut further comprises: closing the bolt; the bottom of the mounting groove is communicated with the telescopic hole, one end of the telescopic hole communicated with the mounting groove is in threaded connection with the sealing bolt, and the pushing face is arranged on the sealing bolt.

Preferably, the closing bolt is a countersunk bolt.

Preferably, a limiting step is arranged between the mounting hole and the telescopic hole, and the extending end is provided with a limiting block matched with the limiting step.

Preferably, one end of the thimble, which faces away from the mounting end, is provided with a conical part.

Preferably, the sleeve body is cylindrical, and the thimble is located at the center of the clamping end.

The sleeve for the flat joint nut provided by the invention has the beneficial effects that: the mounting end of the sleeve for the flat joint nut can be connected with a pneumatic trigger or a torque wrench, the clamping end is clamped with the flat joint nut through the first clamp and the second clamp, and the ejector pin is matched with a machining positioning hole in the steering knuckle to perform positioning and centering to form a special tool for the flat joint nut; when a pneumatic trigger or a torque wrench drives the sleeve body to rotate, the first caliper and the second caliper transmit the same torque to the flat joint nut, so that the two side edges of the flat joint nut are ensured to be equal in screwing torque, the torque deviation caused by screwing by adopting a movable wrench is reduced, the assembly precision of the flat joint nut is improved, the assembly quality is improved, and the assembly stability of the steering knuckle is improved; and this flat joint nut uses thimble location flat joint nut, realizes quick joint, location centering, can accelerate the speed of screwing up and the assembly speed of flat joint nut, improves the assembly efficiency of knuckle, is favorable to the large-scale manufacturing production.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic view of a prior art assembly structure of a flat union nut and a knuckle;

FIG. 2 is a schematic view of a sleeve for a flat union nut according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of another perspective of a sleeve for a flat union nut in accordance with an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a sleeve for a flat union nut according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a thimble according to an embodiment of the present invention;

FIG. 6 is an exploded view of a sleeve for a flat union nut in accordance with an embodiment of the present invention;

fig. 7 is a schematic sectional view showing a structure of a sleeve for a flat union nut according to an embodiment of the present invention in use.

In the figure, 100, the sleeve body; 110. a clamping end; 111. a first caliper; 112. a second caliper; 113. a first clamping surface; 114. a second clamping surface; 115. a clamping groove; 116. mounting holes; 120. an installation end; 121. mounting grooves; 130. a telescopic hole; 140. pushing the surface; 150. a limiting step; 200. a thimble; 210. an extending end; 220. a receiving hole; 230. a limiting block; 240. a conical section; 300. closing the bolt; 310. a bump; 400. a return spring; 80. a flat union nut; 90. a knuckle; 91. and machining the positioning hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

It should be noted that, in the prior art, the mounting structure of the flat union nut 80 and the knuckle 90 is shown in fig. 1, the flat union nut 80 is sleeved outside the knuckle 90, the flat union nut 80 has a straight edge with three sides and an arc, and the center of the knuckle 90 has a machined positioning hole 91.

Referring to fig. 2 to 7, a sleeve for a flat union nut according to an embodiment of the present invention will be described.

Referring to fig. 2 to 4, a sleeve for a flat union nut according to an embodiment of the present invention includes: a sleeve body 100 and a thimble 200; the sleeve body 100 has a snap-in end 110 and a mounting end 120; the clamping end 110 is provided with a first caliper 111 and a second caliper 112, the first caliper 111 is provided with a first clamping surface 113 parallel to the length direction of the sleeve body 100, and the second caliper 112 is provided with a second clamping surface 114 parallel to the length direction of the first clamping surface 113; a clamping groove 115 is formed between the first clamping surface 113 and the second clamping surface 114; the thimble 200 is arranged in the clamping groove 115, the length direction of the thimble 200 is parallel to the length direction of the sleeve body 100, the rotating shaft of the sleeve body 100 is coaxially arranged with the central shaft of the thimble 200, and the rotating shaft of the sleeve body 100 is parallel to the length direction of the sleeve body 100, that is, the sleeve body 100 rotates around the thimble 200 when rotating, so as to ensure that the thimble 200 is a rotating center. The first caliper 111 and the second caliper 112 are symmetrically disposed at both sides of the thimble 200.

The first clamping surfaces 113 of the first calipers 111 are used for abutting against two opposite side straight edges of the flat joint nut 80, the ejector pins 200 are used for being inserted into the machining positioning holes 91 to achieve the purpose of rotating and centering, so that the sleeve body 100 can rotate around the ejector pins 200 when rotating, the first calipers 111 and the second calipers 112 can transmit the same torque to the flat joint nut 80, and the two side edges of the flat joint nut 80 are guaranteed to be screwed with the same torque. The mounting end 120 of the sleeve body 100 is adapted to be coupled to a pneumatic trigger or torque wrench to facilitate an assembler rotating the sleeve body 100 to tighten the flat union nut 80.

Referring to fig. 7, in use, the mounting end 120 of the sleeve body 100 is fixedly connected to a pneumatic trigger or a torque wrench, so that the rotating shaft of the sleeve body 100 is aligned with the rotating shaft of the pneumatic trigger or the torque wrench, and then the pneumatic trigger or the torque wrench with the sleeve for the flat union nut is clamped into a position of a knuckle 90 to be tightened, so that the thimble 200 is aligned with the machining positioning hole 91 on the knuckle 90, so that the clamping groove 115 is clamped on the flat union nut 80, and the first clamping surface 113 and the second clamping surface 114 are abutted against the straight edges of two sides of the flat union nut 80, so that the tightening operation can be performed. A pneumatic trigger is then actuated or a torque wrench is turned to tighten the flat union nut 80 to prevent loosening. On the contrary, when the flat joint nut 80 needs to be removed, only a pneumatic wrench or a torque wrench needs to drive the flat joint nut to rotate reversely by the sleeve.

The mounting end 120 of the sleeve for the flat union nut of the embodiment can be connected with a pneumatic trigger or a torque wrench, the clamping end 110 is clamped with the flat union nut 80 by using a first caliper 111 and a second caliper 112, and the ejector pin 200 is matched with a machining positioning hole 91 on the knuckle 90 for positioning and centering to form a special tool for the flat union nut 80; when a pneumatic trigger or a torque wrench drives the sleeve body 100 to rotate, the first caliper 111 and the second caliper 112 transmit the same torque to the flat joint nut 80, so that the tightening torques applied to two side edges of the flat joint nut 80 are equal, the torque deviation caused by tightening by using an adjustable wrench is reduced, the assembly precision of the flat joint nut 80 is improved, the assembly quality is improved, and the assembly stability of the steering knuckle 90 is improved; in addition, the sleeve for the flat joint nut uses the thimble 200 to position the flat joint nut 80, so that the quick clamping and the positioning centering are realized, the tightening speed and the assembling speed of the flat joint nut 80 can be increased, the assembling efficiency of the steering knuckle 90 is improved, and the large-scale manufacturing production is facilitated.

It should be noted that, the distance between the first latching surface 113 and the second latching surface 114 is matched with the distance between the two side straight edges of the flat union nut 80, and the fit clearance is less than 0.5 mm.

In a preferred embodiment of the present invention, referring to fig. 3 and 4, the center of rotation of the clamping end 110 is provided with a mounting hole 116, and the thimble 200 is disposed in the mounting hole 116. The mounting hole 116 may be formed during the machining of the sleeve body 100, so as to facilitate the direct assembly of the thimble 200 in the mounting hole 116.

In a preferred embodiment of the present invention, referring to fig. 4 to 6, a telescopic hole 130 communicating with the mounting hole 116 is disposed inside the sleeve body 100, the thimble 200 is disposed with an extending end 210 extending into the telescopic hole 130, a pushing surface 140 is disposed inside the telescopic hole 130, and a return spring 400 for driving the thimble 200 to move and return along a length direction of the sleeve body 100 is disposed between the pushing surface 140 and the extending end 210. The length direction of the telescopic hole 130 is parallel to the length direction of the sleeve body 100, so that the thimble 200 can be extended and retracted along the length direction of the telescopic hole 130, and the return spring 400 is used for driving the thimble 200 to be ejected outwards, so that the thimble 200 can be better abutted to the machining positioning hole 91 on the knuckle 90. When the sleeve for the flat joint nut is close to the assembly station of the steering knuckle 90, the ejector pin 200 is abutted with the machining positioning hole 91 of the steering knuckle 90, but the first caliper 111 and the second caliper 112 are not abutted in place with the straight edges on the two sides of the flat joint nut 80; then, the sleeve for the flat union nut is continuously made to be closer to the flat union nut 80, the extending end 210 of the thimble 200 retracts into the telescopic hole 130, and the stroke of the thimble 200 outside the mounting hole 116 is reduced until the first caliper 111 and the second caliper 112 abut against the straight edges at the two sides of the flat union nut 80 in place. When the sleeve body 100 is taken away from the knuckle 90, the end of the thimble 200 protruding from the mounting rod is released from the constraint, and the thimble 200 will return to the original position under the driving of the return spring 400.

In a preferred embodiment of the present invention, referring to fig. 4 and 5, the extending end 210 is provided with a receiving hole 220, one end of the return spring 400 abuts against a blind end of the receiving hole 220, and the other end of the return spring 400 abuts against the pushing surface 140. The receiving hole 220 facilitates the installation and positioning of the return spring 400, so that the return spring 400 is better abutted against the thimble 200 to avoid falling off. The return spring 400 is a compression spring, and provides an elastic force for the thimble 200 to eject out of the mounting hole 116.

In a preferred embodiment of the present invention, referring to fig. 3, 4, and 7, the mounting end 120 is provided with a mounting groove 121 recessed toward the catching end 110. The mounting groove 121 is a torsion groove, and most preferably, the mounting groove 121 is a square groove capable of transferring torsion. In addition, the mounting groove 121 may be a groove capable of transferring torque, such as a hexagon groove, a triangle groove, etc. The mounting groove 121 is used for connecting with a square head of a pneumatic trigger or a torque wrench so as to transmit torque, and the pneumatic trigger or the torque wrench is convenient for driving the sleeve body 100 to rotate so as to tighten the flat joint nut 80 on the knuckle 90.

In a preferred embodiment of the present invention, referring to fig. 3 to 6, the sleeve for a flat union nut further comprises: the close bolt 300; the bottom of the mounting groove 121 is communicated with the telescopic hole 130, one end of the telescopic hole 130 communicated with the mounting groove 121 is in threaded connection with the sealing bolt 300, and the pushing surface 140 is arranged on the sealing bolt 300. When the closing bolt 300 is not installed in the telescopic hole 130, the thimble 200 and the return spring 400 can be placed into the telescopic hole 130 together, and the thimble 200 extends into the installation hole 116, and then the closing bolt 300 is used to seal the return spring 400 and the thimble 200 together, so that the end of the closing bolt 300 extending into the telescopic hole 130 forms the pushing surface 140 abutting against the return spring 400, and then the return spring 400 can drive the thimble 200 to protrude outwards. It should be noted that the closing bolt 300 is provided with a protrusion 310 on the pushing surface 140 to prevent the return spring 400 from being disengaged and dislocated.

In a preferred embodiment of the present invention, referring to fig. 4, the close bolt 300 is a countersunk head bolt. That is, the end of the telescopic hole 130 connected to the mounting groove 121 has a conical surface, so that after the countersunk head bolt is mounted, the groove bottom of the mounting groove 121 is more smooth, and the interference of the sealing bolt 300 on the matching connection between the sleeve body 100 and the pneumatic trigger or the torque wrench is avoided.

In a preferred embodiment of the present invention, referring to fig. 3 and 7, a limit step 150 is disposed between the mounting hole 116 and the telescopic hole 130, and the extending end 210 is provided with a limit block 230 engaged with the limit step 150. The aperture of the retractable hole 130 is larger than the aperture of the mounting hole 116, so that a limiting step 150 is formed between the retractable hole 130 and the mounting hole 116, and the outer diameter of the limiting block 230 is larger than the aperture of the mounting hole 116 and smaller than the aperture of the retractable hole 130, so that the extending end 210 of the thimble 200 does not protrude out of the mounting hole 116, and the thimble 200 is prevented from falling off from the sleeve body 100. When the limit block 230 abuts against the limit step 150, the stroke of the thimble 200 protruding from the mounting hole 116 reaches the maximum.

In a preferred embodiment of the present invention, referring to fig. 4, 5 and 7, in order to better enable the thimble 200 to abut the machined locating hole 91 of the knuckle 90, the end of the thimble 200 facing away from the mounting end 120 has a conical portion 240. The machining positioning hole 91 is a conical concave hole, one end of the ejector pin 200 departing from the mounting end 120 is the end inserted into the machining positioning hole 91, and the conical part 240 enables the ejector pin 200 to be abutted to the machining positioning hole 91 better, so that the rotating shaft of the sleeve for the flat union nut corresponds to the center of the flat union nut 80, and the centering purpose is achieved.

In a preferred embodiment of the present invention, referring to fig. 1 and 2, the sleeve body 100 is cylindrical, and the thimble 200 is located at the center of the clamping end 110, i.e. the thimble 200 is located on the central axis of the cylinder. When the flat union nut 80 is screwed down, the sleeve for the flat union nut needs to do a rotation motion, and the sleeve body 100 is designed to be cylindrical, so that the centrifugal force of the sleeve body 100 during rotation can be reduced, and the rotation is more stable. First calliper 111 and second calliper 112 equal symmetric distribution are in the both sides of drum axis to make the mass distribution more even, let sleeve body 100 more steady when rotating.

The above are only preferred embodiments of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A sleeve for a flat union nut, comprising: the sleeve comprises a sleeve body and a thimble; the sleeve body is provided with a clamping end and an installation end; the clamping end is provided with a first caliper and a second caliper, the first caliper is provided with a first clamping surface parallel to the length direction of the sleeve body, and the second caliper is provided with a second clamping surface parallel to the length direction of the first clamping surface; a clamping groove is formed between the first clamping surface and the second clamping surface; the thimble is arranged in the clamping groove, the length direction of the thimble is parallel to the length direction of the sleeve body, and the rotating shaft of the sleeve body is coaxial with the center shaft of the thimble.

2. The socket as claimed in claim 1, wherein a mounting hole is formed in a center of rotation of the locking end, and the thimble is disposed in the mounting hole.

3. The socket as claimed in claim 2, wherein a telescopic hole communicating with the mounting hole is formed in the socket body, the pin has an extending end extending into the telescopic hole, a pushing surface is formed in the telescopic hole, and a return spring for driving the pin to move and return along a length direction of the socket body is provided between the pushing surface and the extending end.

4. The socket as claimed in claim 3, wherein the insertion end is provided with a receiving hole, one end of the return spring abuts against a blind end of the receiving hole, and the other end of the return spring abuts against the pushing surface.

5. The socket as claimed in claim 3, wherein the mounting end is provided with a mounting groove recessed toward the clamping end.

6. The socket as claimed in claim 5, further comprising: closing the bolt; the bottom of the mounting groove is communicated with the telescopic hole, one end of the telescopic hole communicated with the mounting groove is in threaded connection with the sealing bolt, and the pushing face is arranged on the sealing bolt.

7. The socket as claimed in claim 6, wherein the blind bolt is a countersunk bolt.

8. The sleeve for the flat union nut as claimed in claim 3, wherein a limiting step is provided between the mounting hole and the telescopic hole, and the extending end is provided with a limiting block engaged with the limiting step.

9. The socket as claimed in any one of claims 1 to 8, wherein an end of said thimble facing away from said mounting end has a tapered portion.

10. The socket as claimed in any one of claims 1 to 8, wherein the socket body is cylindrical, and the thimble is located at the center of the engagement end.