Tool device for pressing and locking threads

Abstract

The utility model relates to a tool device for pressing and locking threads, which is characterized in that two alloy pressure heads are pressed on a guide pressing body by two embedded pressing bodies through eight screws and four cylindrical pins, after the installation is completed, two halves of a tool are connected by two pressure springs and four smooth guide pins on two sides, and the two halves of the tool are connected by two pressure springs and four smooth guide pins. A hole matched with a part is formed in the middle of the guiding press-fit body, the front end of the inlaying press-fit body is a thread guiding area, the end face, abutting against the alloy pressing head through a nut, of the part serves as a positioning reference, the distance of the alloy pressing head after press-fit is controlled through the designed gap size L1, and it is guaranteed that thread teeth at the press-fit position on a part screw can be completely flattened and flattened after press-fit operation; the distance L1 between the end faces of the upper alloy pressing head and the lower alloy pressing head after pressing is equal to the distance L2 between the flattening and flattening faces of the part after screw pressing is conducted, and then certain pressure is set on a press machine to conduct pressing operation over the pressing position face. And therefore, the locking and anti-loosening effects of thread pressing are ensured.

Description

Technical Field

[0001] The utility model relates to a pressing device in the hydraulic field, in particular to a tooling device for pressing and locking threads. Background Art

[0002] The current one-way opening pressure hydraulic components are frequently started, and the spring force and hydraulic pressure act alternately. The general anti-loosening nut cannot meet the anti-loosening requirements of this working condition.

[0003] According to actual working conditions, the anti-loosening device required by the product is a hydraulic valve component, which is generally used for one-way shutoff of the oil circuit on the oil return pipeline. This component relies on a spring to adjust the hydraulic pressure. Originally, an anti-loosening nut was used for locking. However, the spring in front of the nut and the gasket worked frequently and continuously impacted the anti-loosening nut, causing the engineering plastic locking device behind the anti-loosening nut to be damaged and lose its anti-loosening effect.

[0004] The general method of preventing loosening is to drill a hole and then insert a cotter pin. However, this solution is complicated and prone to burrs. The nut adjustment position is also prone to displacement (the position of the cotter pin depends on the accuracy of the drilling). Using welding and other methods to prevent loosening is prone to produce welding slag, which may cause pollution to the hydraulic pipeline, and the product appearance is also poor.

[0005] In view of the defects of the existing anti-loosening devices mentioned above, the designers have continuously studied and designed, and after repeated trials and improvements, finally created the utility model which is truly of practical value.

[0006] According to the actual working conditions, the hydraulic components that need to lock the threads belong to pipeline cartridge valves. In the field of mobile hydraulics, thread locking, welding, smashing and other methods cannot be used, which may easily cause pipeline pollution and lead to serious consequences. Based on this, it is urgent to design a pipeline cartridge valve that can not only meet the nut anti-loosening requirements of secondary working conditions, but also improve the cleanliness of the entire valve, so as to have better stability and reliability. Summary of the invention

[0007] The purpose of the utility model is to overcome the defects of the existing one-way opening pressure hydraulic components and provide a new structure of press-fit locking thread tooling device. The technical problem to be solved is to make it meet the nut anti-loosening requirements of secondary working conditions and improve the cleanliness of the entire valve, so as to have better stability and reliability.

[0008] The purpose of the utility model and the technical problem solved are achieved by adopting the following technical solutions. According to the utility model, a press-fitting and locking thread tooling device is composed of an upper press-fitting body and a lower press-fitting body. The upper press-fitting body and the lower press-fitting body are completely identical in structure and are symmetrically installed.

[0009] Each press-fitting body is composed of an inlaid press-fitting body, a guide press-fitting body, an alloy pressure head, a cylindrical pin, and a hexagon socket screw, wherein: two inlaid press-fitting bodies are press-fitted onto the guide press-fitting body by means of eight hexagon socket screws and four cylindrical pins, the part guide groove of the guide press-fitting body is coaxial with the thread guide groove of the inlaid press-fitting body, and two pressure springs and four smooth guide pins are used on both sides of the part guide groove and the thread guide groove to connect the upper press-fitting body and the lower press-fitting body into one.

[0010] Furthermore, each inlaid and pressed body includes a threaded guide groove, an alloy press head embedding groove, a threaded socket, a first cylindrical pin hole and a second cylindrical pin hole. A threaded guide groove is arranged in the middle of the bottom surface of the inlaid and pressed body, and an alloy press head embedding groove is arranged in the middle of the inner mounting surface of the threaded guide groove. The four threaded sockets are axially symmetrically arranged on the inner mounting surface of the inlaid and pressed body, the two first cylindrical pin holes are axially symmetrically arranged on the inner mounting surface of the inlaid and pressed body and are located on the outside of the threaded sockets, and the two second cylindrical pin holes are arranged below the inlaid and pressed body.

[0011] Furthermore, each guide pressing body includes: a spring cavity, a third cylindrical pin hole, a part guide groove and a fourth cylindrical pin hole and a threaded hole. A part guide groove corresponding to the alloy pressure head embedding groove is arranged on the inner mounting surface of the guide pressing body. Two spring cavities are axially symmetrically arranged on both sides of the part guide groove, two third cylindrical pin holes are axially symmetrically arranged in the part guide groove and are located above the spring cavity, four threaded holes are axially symmetrically arranged on the outside of the guide pressing body, and two fourth cylindrical pin holes are axially symmetrically arranged in the fourth cylindrical pin hole and are located on the outside of the fourth cylindrical pin hole.

[0012] The alloy press head embedding groove of each embedded pressing body is embedded with the alloy press head. The alloy press head embedding groove and the alloy press head form a pressing position surface with the position of the threaded guide groove. The cylindrical pin inserted into the first cylindrical pin hole of the embedded pressing body and the fourth cylindrical pin hole of the guide pressing body is used for positioning. The four hexagon socket screws that penetrate into the threaded sockets of the embedded pressing body are screwed into the threaded holes of the guide pressing body.

[0013] Furthermore, the guiding pressing body of the upper pressing body and the guiding pressing body of the lower pressing body are installed and positioned by means of four smooth guide pins, wherein two smooth guide pins serving as guides in the pressing operation of the threaded rod of the workpiece are connected to the third cylindrical pin hole of the threaded guide groove in the upper pressing body and the third cylindrical pin hole of the guiding pressing body in the lower pressing body, two smooth guide pins are connected to the second cylindrical pin hole of the threaded guide groove in the upper pressing body and the second cylindrical pin hole of the threaded guide groove in the lower pressing body, and two spring cavities are respectively loaded with two springs for supporting and returning to the original position after the parts are pressed. Furthermore, the part guide groove in the middle of the two pressed guiding pressing bodies forms a hole for part matching, and the threaded guide groove at the front end of the two pressed embedded pressing bodies is the threaded guide area for the loosening direction of the part matching nut required for pressing processing. The nut adjusted to a position on the part is used to support the end faces of the two pressed alloy pressing heads as a positioning reference. The distance L1 between the end faces of the upper and lower alloy pressing heads after pressing is equal to the distance L2 between the flattened surfaces of the part screw after pressing, so as to ensure that the nut cannot move in the loosening direction.

[0014] Compared with the prior art, the utility model has obvious advantages and beneficial effects. It has at least the following advantages:

[0015] 1. The utility model not only meets the nut anti-loosening requirements of this working condition, but also improves the cleanliness of the entire valve, thereby having better stability and reliability.

[0016] 2. The locking method of the utility model is relatively clean and does not produce welding slag, drilling cuttings and other factors that cause hydraulic pipeline pollution.

[0017] 3. The processing efficiency of the utility model is relatively high. It takes an average of about 10 seconds to press and lock a part, which is much more efficient than drilling holes to install split pins, welding, etc.

[0018] 4. The utility model can produce a better locking effect when used with a 10.9 grade nut. The tooling has a stepped hole positioning structure, which can quickly flatten and lock the nut behind it to ensure the locking position of the nut. It is often used in hydraulic devices to lock the nut to a set spring pressure value.

[0019] 5. The utility model has a certain anti-vibration ability. After pressing, the pitch of the thread produces a certain deformation. On engineering hydraulic machinery, the vibration generated is not enough to counteract the deformation of the external thread and the pitch. When the nut is loose, the changed pitch is different from the nut pitch, which can also further lock the nut.

[0020] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1A This is the initial state diagram of the thread to be pressed.

[0022] Figure 1B It is a schematic diagram of the threaded guide hole of the pressing tool and the position of the alloy pressing head.

[0023] Figure 1C It is a schematic diagram of the thread state after pressing.

[0024] Figure 2A It is a schematic diagram of the upper / lower press-fit body of the utility model.

[0025] Figure 2B It is a schematic diagram of the upper / lower press-fit assembly of the utility model.

[0026] Figure 3A It is a bottom view schematic diagram of the inlaid pressed body of the utility model.

[0027] Figure 3B It is a front view schematic diagram of the inlaid pressed body of the utility model.

[0028] Figure 4A It is a front view schematic diagram of the guide pressing body of the utility model.

[0029] Figure 4B It is a top view schematic diagram of the guide pressing body of the utility model.

[0030] Figure 5 It is a three-dimensional schematic diagram of the utility model in which a cylindrical pin and a spring are installed in a downward pressing fitting body.

[0031] Fig. 6A It is a three-dimensional schematic diagram of the utility model for realizing anti-loosening decomposition.

[0032] Figure 6B It is a schematic diagram of the anti-loosening assembly of the utility model.

[0033] Fig. 7A It is the assembly diagram of the utility model

[0034] Figure 7B yes Fig. 7A AA section view.

[0035] in:

[0036] 1: Inlay press fit

[0037] 1-1: Thread guide groove 1-2: Alloy indenter embedded groove

[0038] 1-3: Threaded hole 1-4: First cylindrical pin hole

[0039] 1-5: Second cylindrical pin hole

[0040] 2: Guided press fit

[0041] 2-1: Spring cavity 2-2: Third cylindrical pin hole

[0042] 2-3: Part guide groove 2-4: Fourth cylindrical pin hole

[0043] 2-5: threaded hole

[0044] 3: Alloy indenter 4: Cylindrical pin

[0045] 5: Hexagon socket screw 6: Pressure spring

[0046] 7: Smooth guide pin DETAILED DESCRIPTION

[0047] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation method, structure, characteristics and effects of a tooling device for pressing and locking threads proposed according to the present invention in combination with the accompanying drawings and preferred embodiments.

[0048] See also Figure 2A , Figure 2B , Figure 5 As shown in FIG6 , a preferred embodiment of the utility model is a tooling device for pressing and locking threads, which mainly includes: an upper pressing body and a lower pressing body, the upper pressing body and the lower pressing body are completely identical in structure, and the upper pressing body and the lower pressing body are symmetrically installed.

[0049] Each press-fit body is composed of an inlaid press-fit body 1, a guide press-fit body 2, an alloy press head 3, a cylindrical pin 4, and a hexagon socket screw 5, wherein:

[0050] The two inlaid pressing bodies 1 are pressed together with two alloy pressing heads 3 on the guide pressing body 2 through 8 hexagon socket screws 5 and 4 cylindrical pins 4. The part guide groove 2-3 of the guide pressing body 2 is coaxial with the thread guide groove 1-1 of the inlaid pressing body 1. Two pressure springs 6 and 4 smooth guide pins 7 are used on both sides of the part guide groove 2-3 and the thread guide groove 1-1 to connect the upper pressing body and the lower pressing body into one.

[0051] See also Figure 3A and Figure 3BAs shown, each inlaid press body 1 includes a threaded guide groove 1-1, an alloy press head embedding groove 1-2, a threaded socket 1-3, a first cylindrical pin hole 1-4 and a second cylindrical pin hole 1-5. A threaded guide groove 1-1 is arranged in the middle of the bottom surface of the inlaid press body 1, and an alloy press head embedding groove 1-2 is arranged in the middle of the inner mounting surface of the threaded guide groove 1-1. Four threaded sockets 1-3 are axially symmetrically arranged on the inner mounting surface of the inlaid press body 1, two first cylindrical pin holes 1-4 are axially symmetrically arranged on the inner mounting surface of the inlaid press body 1 and are located on the outside of the threaded socket 1-3, and two second cylindrical pin holes 1-5 are arranged on the inlaid press body 1.

[0052] See also Figure 4A and Figure 4B As shown, the guide pressing body 2 includes: a spring cavity 2-1, a third cylindrical pin hole 2-2, a part guide groove 2-3 and a fourth cylindrical pin hole 2-4 and a threaded hole 2-5, and a part guide groove 2-3 corresponding to the alloy pressure head embedding groove 1-2 is arranged on the inner mounting surface of the guide pressing body 2, two spring cavities 2-1 are axially symmetrically arranged on both sides of the part guide groove 2-3, two third cylindrical pin holes 2-2 are axially symmetrically arranged in the part guide groove 2-3 and are located above the spring cavity 2-1, four threaded holes 2-5 are axially symmetrically arranged on the outside of the guide pressing body 2, and two fourth cylindrical pin holes 2-4 are axially symmetrically arranged in the fourth cylindrical pin hole 2-4 and are located on the outside of the fourth cylindrical pin hole 2-4.

[0053] See also Figure 2A , Figure 2B , Figure 3A , Figure 3B , Figure 5 As shown in Figure 6, the alloy press head embedding groove 1-2 of each embedded press body 1 embeds the alloy press head 3, and the alloy press head embedding groove 1-2 and the alloy press head 3 form a pressing position surface with the position of the threaded guide groove 1-1, which is positioned by inserting the cylindrical pin 4 into the first cylindrical pin hole 1-4 of the embedded press body 1 and the fourth cylindrical pin hole 2-4 of the guide press body 2, and is positioned by penetrating the four hexagon socket screws 5 through the threaded socket hole 1-3 of the embedded press body 1 and screwing into the threaded hole 2-5 of the guide press body 2.

[0054] The guiding pressing body 2 of the upper pressing body and the lower pressing body is installed and positioned by means of four smooth guide pins 7, two of which serve as guides in the pressing operation of the threaded rod of the workpiece. The smooth guide pins 7 connect the third cylindrical pin hole 2-2 of the guiding pressing body in the upper pressing body and the third cylindrical pin hole 2-2 of the guiding pressing body 2 in the lower pressing body, and two smooth guide pins 7 connect the second cylindrical pin hole 1-5 of the threaded guide groove 1-1 in the upper pressing body and the second cylindrical pin hole 1-5 of the threaded guide groove 1-1 in the lower pressing body. The two spring cavities 2-1 are respectively equipped with two springs 6 for supporting and returning to the original position after the parts are pressed.

[0055] The two inlaid pressing bodies 1 are press-fitted with two alloy pressing heads 3 on the guide pressing body 2 through 8 hexagon socket screws 5 and 4 cylindrical pins 4. Two smooth guide pins 7 arranged on both sides of the two inlaid pressing bodies 1 connect the two halves of the two inlaid pressing bodies 1. The part guide groove 2-3 in the middle of the two pressed guiding pressing bodies 2 forms a part matching hole. The thread guide groove 1-1 at the front end of the two pressed inlaid pressing bodies 1 is the thread guide area in the loosening direction of the part matching nut required for pressing processing. The end faces of the two pressed alloy pressing heads 3 are supported by the nuts adjusted to the position on the parts as the positioning reference. In order to control the distance between the end faces of the two pressed alloy pressing heads 3 in the pressed state, in order to ensure that the thread teeth at the pressing position on the part screw can be completely flattened after the pressing operation, the distance L1 between the end faces of the upper and lower alloy pressing heads 3 after pressing is equal to the distance L2 between the flattened surfaces of the part screw after pressing (see Figure 1). A certain pressure is set on the press. Figure 7B The pressing operation is performed just above the cross-section shown in AA. This ensures that the nut cannot move in the loosening direction, thus achieving the effect of stopping and preventing loosening.

[0056] Assembly and working principle of anti-loosening by pressing thread: Take the one-way opening pressure hydraulic component as an example:

[0057] First, the upper press-fit body and the lower press-fit body are connected by four smooth guide pins 7 which are respectively inserted into the second cylindrical pin hole 1-5 and the third cylindrical pin hole 2-2 to limit the connection and freedom of movement of the upper and lower press-fit bodies. The spring 6 installed in the spring cavity 2-1 plays a resetting role.

[0058] In the free state of the utility model of the press-fit locking thread, the inherent spring force of the spring 6 separates the upper / lower press-fit bodies so that there is a certain distance between the upper / lower press-fit bodies, and the four smooth guide pins 7 enable the upper / lower press-fit bodies to move only along the axial direction of the four smooth guide pins 7.

[0059] Insert the product - the one-way opening pressure hydraulic element into the part guide groove 2-3 of the guide pressing body 2 and push it to the bottom. At this time, the nut of the product just rests on the end face of the alloy pressure head 3 embedded in the embedded pressing body 1, and the screw in the loosening direction of the product nut just penetrates into the thread guide groove 1-1 of the embedded pressing body 1. At this time, the state of the screw is the initial state, that is, a cylindrical external thread.

[0060] See also Figure 1A , Figure 1B and Figure 1CPlace the assembled press-fit locking threaded utility model and parts on the work surface of the press, press the button to lower the press head, control the press head to be just above the position of the alloy press head 3 corresponding to the upper press-fit body, operate the press to continue to lower the press head to press the upper press-fit body and the lower press-fit body of the utility model at the position of the cylindrical external thread required for the press-fit operation, and maintain the pressure for about 3 seconds. At this time, the pressure of the press is transmitted to the upper alloy press head 3 and the lower alloy press head 3 through the press-fit body and the lower press-fit body, and acts on the upper and lower sides of the screw in the direction of loosening the nut of the product, and the cylindrical external thread is flattened by the alloy press head 3, that is, at this time, the thread behind the nut of the product becomes an ellipse with a flat structure, and the thread pitch at this position will also be destroyed, and the threaded hole of the nut of the product cannot pass through this flat structure ellipse ( Figure 1B ), and the thread pitch cannot be matched and cannot be screwed out normally, thereby locking the position of the nut on the one-way opening pressure hydraulic component of the product.

[0061] The pressure head of the lifting press is moved to the initial position. The upper and lower pressure bodies are separated by a certain distance along the axis direction of the four smooth guide pins 7 by the spring force of the spring 6. At this time, the product of the completed process - the one-way opening pressure hydraulic component can be taken out, and the above process can be repeated to process the next product.

[0062] The above description is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A tooling device for pressing and locking threads, characterized in that: It consists of an upper press-fit body and a lower press-fit body, the upper press-fit body and the lower press-fit body have the same structure, and the upper press-fit body and the lower press-fit body are installed symmetrically; Each press-fitting body is composed of an embedded press-fitting body (1), a guide press-fitting body (2), an alloy pressure head (3), a cylindrical pin (4), and an inner hexagon screw (5), wherein: two embedded press-fitting bodies (1) are press-fitted with two alloy pressure heads (3) on the guide press-fitting body (2) by means of eight inner hexagon screws (5) and four cylindrical pins (4); the part guide groove (2-3) of the guide press-fitting body (2) is coaxial with the thread guide groove (1-1) of the embedded press-fitting body (1); two pressure springs (6) and four smooth guide pins (7) are used on both sides of the part guide groove (2-3) and the thread guide groove (1-1) to connect the upper press-fitting body and the lower press-fitting body into one body.

2. A tooling device for pressing and locking threads according to claim 1, characterized in that: Each inlay press body (1) comprises a thread guide groove (1-1), an alloy press head embedding groove (1-2), a thread socket (1-3), a first cylindrical pin hole (1-4) and a second cylindrical pin hole (1-5); a thread guide groove (1-1) is arranged in the middle of the bottom surface of the inlay press body (1); an alloy press head embedding groove (1-2) is arranged in the middle of the inner mounting surface of the thread guide groove (1-1); four thread sockets (1-3) are axially symmetrically arranged on the inner mounting surface of the inlay press body (1); two first cylindrical pin holes (1-4) are axially symmetrically arranged on the inner mounting surface of the inlay press body (1) and are located outside the thread sockets (1-3); and two second cylindrical pin holes (1-5) are arranged below the inlay press body (1).

3. A tooling device for pressing and locking threads according to any one of claims 1 to 2, characterized in that: Each guide press-fit body (2) comprises: a spring cavity (2-1), a third cylindrical pin hole (2-2), a part guide groove (2-3), a fourth cylindrical pin hole (2-4) and a threaded hole (2-5); a part guide groove (2-3) corresponding to the alloy pressure head embedding groove (1-2) is arranged on the inner mounting surface of the guide press-fit body (2); two spring cavities (2-1) are axially symmetrically arranged on both sides of the part guide groove (2-3); two third cylindrical pin holes (2-2) are axially symmetrically arranged on the part guide groove (2-3) and located above the spring cavity (2-1); four threaded holes (2-5) are axially symmetrically arranged on the outside of the guide press-fit body (2); and two fourth cylindrical pin holes (2-4) are axially symmetrically arranged on the fourth cylindrical pin hole (2-4) and located on the outside of the fourth cylindrical pin hole (2-4); The alloy pressing head embedding groove (1-2) of each embedded pressing body (1) embeds the alloy pressing head (3), and the alloy pressing head embedding groove (1-2) and the alloy pressing head (3) form a pressing position surface with the position of the threaded guide groove (1-1). Positioning is performed by inserting a cylindrical pin (4) into the first cylindrical pin hole (1-4) of the embedded pressing body (1) and the fourth cylindrical pin hole (2-4) of the guide pressing body (2), and four hexagon socket screws (5) penetrated into the threaded socket hole (1-3) of the embedded pressing body (1) and screwed into the threaded hole (2-5) of the guide pressing body (2).

4. A tooling device for pressing and locking threads according to claim 3, characterized in that: The guide pressing body (2) of the upper pressing body and the guide pressing body (2) of the lower pressing body are installed and positioned by four smooth guide pins (7), wherein two smooth guide pins (7) used as guides in the pressing operation of the threaded rod of the workpiece are connected to the third cylindrical pin hole (2-2) of the guide pressing body in the upper pressing body and the third cylindrical pin hole (2-2) of the guide pressing body (2) in the lower pressing body, and two smooth guide pins (7) are connected to the second cylindrical pin hole (1-5) of the threaded guide groove (1-1) in the upper pressing body and the second cylindrical pin hole (1-5) of the threaded guide groove (1-1) in the lower pressing body, and two spring chambers (2-1) are respectively loaded with two springs (6) for supporting and returning to the original position after the parts are pressed.

5. The tooling device for pressing and locking threads according to claim 3, characterized in that: The part guide groove (2-3) in the middle of the two pressed guide pressing bodies (2) forms a hole for the part to match, and the thread guide groove (1-1) at the front end of the two pressed embedded pressing bodies (1) is a thread guide area for the loosening direction of the part matching nut required for the pressing process. The nut adjusted to a position on the part is used to support the end faces of the two pressed alloy pressing heads (3) as a positioning reference. The distance L1 between the end faces of the upper and lower alloy pressing heads (3) after pressing is equal to the distance L2 between the flattened surfaces of the part screw after pressing, so as to ensure that the nut cannot move in the loosening direction.

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