CN210799655U

CN210799655U - Combined screw capable of fixing torque, pump body assembly and compressor thereof

Info

Publication number: CN210799655U
Application number: CN201921941050.4U
Authority: CN
Inventors: 张博; 李建民; 皮明超; 尤杰
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhengzhou Landa Compressor Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhengzhou Landa Compressor Co Ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-06-19
Anticipated expiration: 2029-11-11

Abstract

The utility model provides a but combination screw of definite moment of torsion, pump body subassembly and compressor thereof, including the cover establish screw overcoat and plug together, the head of screw overcoat is equipped with the nut, is equipped with a step hole in the nut, and the bottom in step hole is equipped with a through-hole that runs through nut and screw overcoat, through-hole and the coaxial setting of screw overcoat, and the one end of plug sets up in the through-hole, and the other end of plug is equipped with one with the tip dog of step hole looks adaptation, and the tip dog sets up in the step hole, and the terminal surface of tip dog flushes with the terminal surface of nut, the utility model discloses change original screw structure, make original integrative screw change into combination screw, reduce threaded fatigue strength to and the possibility that the moment of torsion changes, realize that the screw is not attenuated again after squeezing into according.

Description

Combined screw capable of fixing torque, pump body assembly and compressor thereof

Technical Field

The utility model belongs to the technical field of the air condition compressor technique and specifically relates to a but combination screw, pump body subassembly and compressor of definite moment of torsion are related to.

Background

At present, the connection of air condition compressor pump body subassembly, cylinder and flange muffler three all is through screw connection to there is the moment of torsion requirement to the screw of connecting, as shown in figure 1, current screw is integrative screw, after throwing into the connecting piece according to certain moment of torsion, takes place to warp along with the screw thread on the time change screw, leads to the moment of torsion decay, influences air condition compressor's performance.

SUMMERY OF THE UTILITY MODEL

The utility model provides a but combination screw, pump body subassembly and compressor of fixed moment of torsion have changed original screw structure, make original integrative screw change into combination screw, reduce the fatigue strength of screw thread to and the possibility that the moment of torsion changes, realize that the screw is not attenuated again after squeezing into according to the technology moment of torsion.

The utility model discloses a first technical scheme is realized like this:

but combination screw of fixed moment of torsion is established including the cover and is established screw overcoat and plug together, the head of screw overcoat is equipped with the nut, be equipped with a step hole in the nut, the bottom in step hole is equipped with one and runs through the through-hole of nut and screw overcoat, the through-hole with the coaxial setting of screw overcoat, the one end of plug set up in the through-hole, the other end of plug be equipped with one with the tip dog of step hole looks adaptation, the tip dog set up in the step is downthehole, the terminal surface of tip dog with the terminal surface of nut flushes.

As a preferable technical scheme, the diameter of the mandrel is 0.2-0.6 times of that of the screw outer sleeve, and the unilateral gap between the outer side wall of the mandrel and the inner wall of the through hole is 0.01-0.04 mm.

As a preferable technical scheme, the thread distance of the screw outer sleeve is 0.01-100 mm.

As a preferable technical solution, the height of the stepped hole is less than half of the height of the nut.

As a preferable technical scheme, the core rod is a rod body made of metal materials with Brinell hardness of more than or equal to 80.

The second technical scheme of the utility model is realized like this:

and the pump body assembly comprises the combined screw.

The third technical scheme of the utility model is realized like this:

the compressor comprises the pump body assembly.

By adopting the technical scheme, the beneficial effects of the utility model are that:

because but the combination screw of moment of torsion, establish screw overcoat and plug together including the cover, use the utility model discloses the time, according to the moment of torsion value of setting for, adopt manual or electronic mode, squeeze into the screw overcoat in treating two spare parts of connecting, use in the plug inserts the through-hole of screw overcoat, when beating because of the screw, receive radial inward power, the screw atress changes, and can arouse reducing of through-hole size, uses the plug to insert the through-hole, flushes with the terminal surface of screwhead portion until the terminal surface of plug.

The utility model discloses in utilized shaft hole complex principle and stress compensation's principle, confirm screw thread distance and external diameter size on the screw overcoat and produce the screw overcoat according to assembly connection's needs, and make hollow structure with the screw overcoat, and cooperation hollow structure increases the plug, the mode of squeezing into of screw is unchangeable, the screw overcoat is squeezed into behind the connecting piece according to the moment of torsion of requirement, push into the through-hole with the plug in, can avoid the moment of torsion change because of the deformation of thread atress arouses, the deformation of screw overcoat has been supplemented in the insertion of plug, make the screw thread in close contact with on the screw overcoat and the connecting piece, thereby make the screw moment of torsion no longer change.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural view of a conventional integrated screw;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic structural view of the screw casing of the present invention.

Wherein: 1. a screw housing; 2. a core rod; 3. a nut; 4. a stepped bore; 5. a through hole; 6. an end stop.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

As shown in fig. 2 and fig. 3 together, the torque-fixable combination screw comprises a screw outer sleeve 1 and a core rod 2 which are sleeved together, wherein the head of the screw outer sleeve 1 is provided with a nut 3, a step hole 4 is arranged in the nut 3, the bottom of the step hole 4 is provided with a through hole 5 which penetrates through the nut 3 and the screw outer sleeve 1, the through hole 5 is arranged coaxially with the screw outer sleeve 1, one end of the core rod 2 is arranged in the through hole 5, the other end of the core rod 2 is provided with an end stop 6 which is matched with the step hole 4, the end stop 6 is arranged in the step hole 4, the end face of the end stop 6 is flush with the end face of the nut 3, when the utility model is used, the screw outer sleeve 1 is driven into two parts to be connected by adopting a manual or electric mode according to a set torque value, the core rod 2 is inserted into the through hole 5 of the screw outer sleeve 1, and is subjected, the thread is stressed and causes a reduction in the size of the through hole 5, the core rod 2 is inserted into the through hole 5 until the end face of the core rod 2 is flush with the end face of the head of the screw.

Wherein the diameter of the core rod 2 is 0.2-0.6 times of the diameter of the screw outer sleeve, and the unilateral clearance between the outer side wall of the core rod 2 and the inner wall of the through hole 5 is 0.01-0.04 mm.

The thread distance of the screw outer sleeve 1 is 0.01-100 mm.

Also, the height of the stepped hole 4 is less than half of the height of the nut 3.

The mandrel 2 is a rod body made of a metal material having a brinell hardness of 80 or more.

The utility model discloses in utilized shaft hole complex principle and stress compensation's principle, confirm screw thread distance and external diameter size on the screw overcoat 1 and produce screw overcoat 1 according to the needs of erection joint, and make hollow structure with screw overcoat 1, and cooperation hollow structure increases plug 2, the mode of squeezing into of screw is unchangeable, screw overcoat 1 squeezes into the connecting piece back according to the moment of torsion that requires, push into in through-hole 5 with plug 2, can avoid the moment of torsion change because of the deformation of thread atress arouses, plug 2 inserts the deflection that has supplemented screw overcoat 1, make the screw thread in close contact with on the screw thread on the screw overcoat 1 and the connecting piece, thereby make the screw moment of torsion no longer change.

Example two

And the pump body assembly comprises the combined screw.

EXAMPLE III

The compressor comprises the pump body assembly.

Compare in traditional compressor, use the utility model discloses connect, reduce the fatigue strength of screw thread on the screw overcoat 1, reduced the possibility that the moment of torsion changed, guaranteed the reliability of connecting between two spare parts, avoid appearing influencing the performance of compressor because of the moment of torsion changes, improved the quality of compressor.

To sum up, the utility model provides a but combination screw, pump body subassembly and compressor of fixed moment of torsion have changed original screw structure, make original integrative screw change into combination screw, reduce the fatigue strength of screw thread to and the possibility that the moment of torsion changes, realize that the screw is not attenuated again after squeezing into according to the technology moment of torsion.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. But combination screw of fixed moment of torsion, its characterized in that establishes screw overcoat and plug together including the cover, the head of screw overcoat is equipped with the nut, be equipped with a step hole in the nut, the bottom in step hole is equipped with one and runs through the through-hole of nut and screw overcoat, the through-hole with the coaxial setting of screw overcoat, the one end of plug set up in the through-hole, the other end of plug be equipped with one with the tip dog of step hole looks adaptation, the tip dog set up in the step hole, the terminal surface of tip dog with the terminal surface of nut flushes.

2. The torque settable combination screw according to claim 1, wherein the core rod has a diameter of 0.2 to 0.6 times the diameter of the screw outer sleeve, and the single-sided clearance between the outer sidewall of the core rod and the inner wall of the through hole is 0.01 to 0.04 mm.

3. A settable combination screw according to claim 1, wherein the screw outer sleeve has a thread pitch of 0.01-100 mm.

4. The torque settable combination screw according to claim 1, wherein the stepped bore has a height less than half of the height of the nut.

5. The torque settable combination screw according to claim 1, wherein the core rod is a rod made of a metal material having a brinell hardness of 80 or greater.

6. Pump body assembly, characterized in that it comprises a combination screw according to any one of claims 1 to 5.

7. A compressor, comprising the pump body assembly of claim 6.