A nut fixing device for air conditioner stop valve

Abstract

The invention discloses a nut fixing device for a stop valve of an air conditioner, comprising a sleeve body, a reset spring and an end cover, wherein the sleeve body is composed of an outer cylinder and an inner cylinder nested inside the outer cylinder, a connection hole is provided in the middle of the end cover, the end cover connection hole is connected to a torque wrench, a groove is provided inside the outer cylinder, a flange structure is provided between the grooves inside the tail end of the outer cylinder, a convex tooth structure is connected to one end of the inner cylinder, the convex tooth structure and the inner cylinder are an integrated structure, the convex tooth structure and the groove at the tail end of the outer cylinder are cross-connected and abutted against each other, the reset spring is located between the end cover and the convex tooth structure, and the end cover is detachably installed at the tail end of the outer cylinder. The invention can be applied to the fixing of nuts of different specifications, reduce beat waste, facilitate maintenance and servicing, and has a long service life and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of nut sleeves, in particular to a nut fixing device for a stop valve of an air conditioner. Background Art

[0002] Patent No. 201920421040.1 discloses a sleeve structure, including a sleeve body, and specifically discloses that the handle connection part at one end of the sleeve body is an integrated structure with the sleeve body, and the mutually nested multi-layer annular sleeves are installed inside the sleeve, and the tail end of each annular sleeve is correspondingly connected to a spring, which is fixed to the bottom of the sleeve body. The technical problem solved by the comparative document is to provide a sleeve structure that is suitable for nuts of various sizes and can effectively prevent the nuts from falling off.

[0003] The defects of the comparative document are: the handle connection part at one end of the sleeve of the comparative document is an integrated structure with the sleeve body, which is a non-detachable structure, which is not convenient for replacement of the sleeve and spring, internal lubrication, and maintenance, and has a short service life and increased costs. In addition, the sleeve of the comparative document nests the sleeves with each other through guide grooves and top screws. Damage to any internal sleeve will affect the use of the entire sleeve. The convenience and flexibility are not high, the structure is relatively complex, and the cost-effectiveness of repeated use is not high. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a fixing device that can realize nuts of different specifications; and the structure is simple, convenient and practical, and can be reused repeatedly, avoiding the waste of beats caused by converting nut sleeves when tightening the air-conditioning stop valve nut, the increased labor intensity caused by one person using two tools, and the loss of matching tools.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a nut fixing device for an air conditioner stop valve, comprising a sleeve body, a return spring and an end cover, wherein the sleeve body is composed of an outer cylinder and an inner cylinder nested in the outer cylinder, a connecting hole is provided in the middle of the end cover, and the connecting hole in the end cover is connected to a torque wrench, wherein a groove is provided inside the outer cylinder, a flange structure is provided between the grooves inside the rear end of the outer cylinder, a convex tooth structure is connected to one end of the inner cylinder, the convex tooth structure and the inner cylinder are an integrated structure, the convex tooth structure and the groove at the rear end of the outer cylinder cross-abut each other, the return spring is located between the end cover and the convex tooth structure, and the end cover can be detachably installed on the rear end of the outer cylinder.

[0006] As a further improvement of the present invention: when the return spring is in a semi-compressed state, the flange structure abuts against the convex tooth structure.

[0007] As a further improvement of the present invention: a plurality of flange structures are provided; the flange structure is provided on the inner wall of the inner groove at the rear end of the outer tube, and is used to support the convex tooth structure after the inner tube is reset, so as to limit the reset position of the inner tube.

[0008] As a further improvement of the present invention: a receiving groove for receiving the inner tube and the return spring in a fully compressed state is provided inside the rear end of the outer tube.

[0009] As a further improvement of the present invention: the size of the convex tooth structure is smaller than the size of the groove formed inside the outer cylinder; the size of the convex tooth structure is optimally matched with the size of the groove formed inside the outer cylinder, ensuring that the inner cylinder can slide freely in the outer cylinder and will not slide relative to each other when tightening the nut.

[0010] As a further improvement of the present invention: the end cover is movably mounted on the tail end of the outer cylinder by screws.

[0011] As a further improvement of the present invention: the diameter of the cross section of the return spring is between the diameter of the inner cylinder and the diameter of the outer cylinder.

[0012] As a further improvement of the present invention: the interiors of the outer cylinder and the inner cylinder are both provided with polygonal grooves suitable for the nut.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention combines two nut sleeves of different specifications through a reset spring, an outer tube flange, and an inner tube convex tooth. The end cover is detachably fixed to the tail of the outer tube by four screws. The reset spring is installed between the inner tube convex tooth and the end cover, so that the inner tube can freely expand and contract in the outer tube, thereby achieving the technical effect of being suitable for nuts of different specifications.

[0015] 2. Avoid the problems of wasted time due to conversion of nut sleeve when tightening the air-conditioning stop valve nut, increased labor intensity due to one person using two tools, and tool wear and tear.

[0016] 3. Compared with the traditional method, the cycle of the present invention is reduced from 13s to 11s, with a reduction ratio of 15.4%, the tool weight is reduced by 48%, and the matching torque wrench types are reduced from the original 3 to 2, reducing the tool loss cost by 33.3%. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded view of the nut fixing device of the present invention.

[0018] Figure 2 It is a three-dimensional cross-sectional view of the nut fixing device of the present invention.

[0019] Figure 3It is a cross-sectional view of the nut fixing device of the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described with reference to the accompanying drawings and embodiments:

[0021] The design is based on the fact that each type of air conditioner stop valve nut has two models. This solves the technical problem that before using this device, two different specifications of sockets and torque wrenches had been used. When employees operate, they need to switch tools frequently, which not only has a certain impact on the production rhythm, but also doubles the number of matching torque wrenches.

[0022] like Figures 1 to 3 As shown, the present invention provides a nut fixing device for a stop valve of an air conditioner, comprising a sleeve body, a return spring 4 and an end cover 5, wherein the sleeve body is composed of an outer cylinder 2 and an inner cylinder 1 nested in the outer cylinder 2, the outer cylinder 2 is provided with a groove, a flange structure is provided between the grooves in the rear end of the outer cylinder 2, one end of the inner cylinder 1 is connected with a convex tooth structure 11, the convex tooth structure 11 and the inner cylinder 1 are an integrated structure, the convex tooth structure 11 and the groove at the rear end of the outer cylinder 2 are cross-abutted with each other, the return spring 4 is provided in the rear end of the outer cylinder 2, the return spring 4 is located between the end cover 5 and the convex tooth structure 11, the end cover 5 is installed at the rear end of the outer cylinder 2, a connecting hole 7 is provided in the middle of the end cover 5, and the end cover 5 is connected to the torque wrench through the connecting hole 7.

[0023] Specifically, when the return spring 4 is in a semi-compressed state, the flange structure 21 abuts against the convex tooth structure 11. The flange structure 21 plays a limiting role, which can prevent the spring from pushing out the inner tube 1 during use, and limit the position of the inner tube 1 when it is reset. Four flange structures 21 are provided, or several flange structures 21 are provided, forming a circular flange structure 21 as a whole.

[0024] Specifically, in order to enable the inner tube 1 to slide freely in the outer tube 2 and avoid relative sliding when tightening the nut, the size of the convex tooth structure 11 is set to be smaller than the size of the groove formed inside the outer tube 2, so that the position of the inner tube 1 relative to the outer tube 2 is fixed when replacing and fixing the small valve, that is, the position of the inner tube 1 relative to the torque wrench is fixed.

[0025] Specifically, a receiving groove for accommodating the inner cylinder 1 and the return spring 4 in a fully compressed state is provided inside the rear end of the outer cylinder 2, and the receiving groove is the space formed between the flange structure 21 and the end cover 5. When the return spring 4 is fully compressed, the open end of the inner cylinder 1 is flush with the lower end of the flange structure 21, or the open end of the inner cylinder 1 protrudes from the lower end of the flange structure 21.

[0026] The return spring 4 is a compression spring, which enables the inner cylinder 1 to freely expand and contract in the outer cylinder 2 . The diameter of the cross section of the return spring 4 is between the diameter of the inner cylinder 1 and the diameter of the outer cylinder 2 .

[0027] Specifically, a fixing hole is provided at the rear end of the outer cylinder 2, and a corresponding positioning hole is provided at the end cover 5. The end cover 5 is movably mounted on the rear end of the outer cylinder 2 by means of screws 6, so that the end cover 5 and the outer cylinder 2 can be detachably mounted, which is convenient for replacement of the sleeve of the nut fixing device and the return spring 4, internal lubrication, and maintenance, which is more beneficial to the service life and cost of the device.

[0028] Specifically, the outer cylinder 2 and the inner cylinder 1 are both polygonal structures, and the grooves inside the outer cylinder 2 and the inner cylinder 1 are both polygonal grooves suitable for fastening nuts.

[0029] Detailed description of the present invention: First, the inner cylinder 1 is installed through the tail end of the outer cylinder 2 until the flange structure 21 of the outer cylinder 2 abuts against the convex teeth of the inner cylinder 1 structure, and then the return spring 4 and the end cover 5 are installed in sequence. At this time, the spring located between the convex tooth structure 11 and the end cover 5 is in a semi-compressed state. Finally, the end cover 5 is fixed to the outer cylinder 2 with the fixing screws of the end cover 5 to complete the installation of the nut fixing device.

[0030] Working principle of the present invention: When using this device, first fix the torque wrench on the square through hole of the end cover to fix the relative position of the outer cylinder and the torque wrench. For fixing the large valve of the air conditioner, when the large valve nut is inserted into this device, the large valve nut will push the inner cylinder to the bottom of the outer cylinder. Turning the torque wrench can achieve the tightening of the large valve. At this time, the reset spring is in a fully compressed state. After the large valve nut is fixed, pull out this device, and the inner cylinder can be automatically reset by the elastic force of the reset spring until the convex teeth of the inner cylinder hit the flange of the outer cylinder. The inner cylinder can be used directly to fix the small valve. The convex teeth of the inner cylinder and the internal grooves of the outer cylinder intersect with each other to achieve the fixation of the relative position of the outer cylinder, that is, the fixation of the position of the inner cylinder relative to the torque wrench. At this time, turning the torque wrench can achieve the fixation of the small valve nut.

[0031] The main function of the present invention: The present invention utilizes the groove inside the polygonal outer cylinder itself, the integrated convex tooth structure of the nested inner cylinder, the reset spring and the end cover to fix nuts of different specifications, which has high convenience and flexibility, low cost, reduces the beat waste caused by converting the nut sleeve, and improves efficiency.

[0032] In summary, after reading the present invention document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the present invention without creative mental work, which all fall within the scope of protection of the present invention.

Claims

1. A nut fixing device for a stop valve of an air conditioner, comprising a sleeve body, a return spring and an end cover, wherein the sleeve body is composed of an outer cylinder and an inner cylinder nested inside the outer cylinder, a connecting hole is provided in the middle of the end cover, and the end cover is connected to a torque wrench through the connecting hole, characterized in that: A groove is provided inside the outer cylinder, and a flange structure is provided between the grooves inside the rear end of the outer cylinder. A convex tooth structure is connected to one end of the inner cylinder, and the convex tooth structure and the inner cylinder are an integrated structure. The convex tooth structure and the groove at the rear end of the outer cylinder cross-abut each other, and the reset spring is located between the end cover and the convex tooth structure, and the end cover can be detachably installed on the rear end of the outer cylinder; when the reset spring is fully compressed, the open end of the inner cylinder is flush with the lower end of the flange structure or the open end of the inner cylinder protrudes from the lower end of the flange structure.

2. The air conditioner stop valve nut fixing device according to claim 1, characterized in that: When the return spring is in a semi-compressed state, the flange structure abuts against the convex tooth structure.

3. The air conditioner stop valve nut fixing device according to claim 1, characterized in that: The flange structures are provided in plurality.

4. The air conditioner stop valve nut fixing device according to claim 1, characterized in that: An accommodating groove for accommodating the inner tube and the return spring in a fully compressed state is provided inside the rear end of the outer tube.

5. The air conditioner stop valve nut fixing device according to claim 1, characterized in that: The size of the convex tooth structure is smaller than the size of the groove formed inside the outer cylinder.

6. The air conditioner stop valve nut fixing device according to claim 1, characterized in that: The end cover is movably mounted on the rear end of the outer cylinder by means of screws.

7. The air conditioner stop valve nut fixing device according to claim 1, characterized in that: The diameter of the cross section of the return spring is between the diameter of the inner cylinder and the diameter of the outer cylinder.

8. The air conditioner stop valve nut fixing device according to claim 1, characterized in that: The outer cylinder and the inner cylinder are both provided with polygonal grooves suitable for the nut.

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