Self-adaptive spring compression device

Abstract

The self-adaptive spring compression device comprises an upper bracket and a lower bracket, the upper bracket comprises a top plate and an upper bracket side edge below the edge of the top plate, the lower bracket comprises a bottom plate and a lower bracket side edge above the edge of the bottom plate, and a main body of a plate-shaped structure is further arranged between the upper bracket and the lower bracket; a first motor and a second motor are connected to the body, a first lead screw and a first lead screw nut are connected to the upper portion of the first motor, the first lead screw nut is connected with the side edge of the upper bracket, a second lead screw and a second lead screw nut are connected to the lower portion of the second motor, and the second lead screw nut is connected with the side edge of the lower bracket. After the device is adopted, a strapping steel wire does not need to be used, and meanwhile, the compressed spring can be slowly released, so that damage to peripheral parts in the releasing process of the compressed spring is avoided, and the qualification rate of finished products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical assembly technical field especially, relates to a spring compression device more specifically, for a kind of self-adapting spring compression device. BACKGROUND

[0002] Valve equipment is generally internally provided with spring, and the spring is usually compressed during assembly, for example, when assembling integral type release valve containing spring, due to limited internal space, the spring with free length cannot enter the valve body, and must be pre-pressed to the specified length before being placed into the valve body, and then sleeved into the valve core. For this work, the commonly used working method is to pre-press the spring with a press, then use steel wire to bundle and limit the spring to the specified length, then place the compressed spring into the predetermined position (such as sleeved outside the valve core, and tightened the limiting device at the upper end thereof), and finally cut the steel wire to restore the free height of the spring.

[0003] In the process of realizing the utility model, the inventor finds that there are at least the following problems in the prior art:

[0004] In the above assembly process, it is difficult to control the breaking path of the steel wire during cutting, which causes the steel wire to be easily stuck or unable to be taken out, and the compressed spring may suddenly rebound due to the instantaneous disappearance of the pressure, and the excessive rebound force may damage the limiting device for pressing the spring, and further cause the spring to collide with the adjacent component, which may cause unpredictable damage to the assembly body during the process, and finally affect the overall performance of the product, resulting in unqualified products. Therefore, how to avoid damage to the adjacent components during the release process of the compressed spring is a problem to be solved. UTILITY MODEL CONTENTS

[0005] The utility model embodiment provides a kind of self-adapting spring compression device, to realize accurate and fast spring compression, and then improve assembly efficiency.

[0006] To achieve the above purpose, the utility model embodiment provides a kind of self-adapting spring compression device, including upper support and lower support, the upper support includes horizontal top plate and the upper support side edge connected vertically below the edge of top plate, the lower support includes horizontal bottom plate and the lower support side edge connected vertically above the edge of bottom plate, and the upper support and the lower support are further provided with the main body of plate structure;First motor and second motor are connected on the main body respectively, the upper side of first motor is connected with first lead screw, first lead screw nut is screwed on first lead screw, and first lead screw nut is connected with the upper support side edge, the lower side of second motor is connected with second lead screw, second lead screw nut is screwed on second lead screw, and second lead screw nut is connected with the lower support side edge.

[0007] Further, the top plate and the bottom plate are sector plates with the same radius and the same central angle, the upper supporting seat side is connected below the arc-shaped edge of the top plate, and the lower supporting seat side is connected above the arc-shaped edge of the bottom plate; the main body is a hollow cylindrical structure with one side open, which is enclosed by an arc-shaped plate, and the central angle corresponding to the arc-shaped plate is the same as the central angle of the sector plate, and the radius of the arc of the arc-shaped plate is the same as the radius of the sector plate; the radius of the sector plate is greater than the radius of the spring.

[0008] Further, the central angle of the sector plate is 180°.

[0009] Further, the first motor and the second motor are located on the inner side of the main body; the distance between the first motor and the axis of the main body and the distance between the second motor and the axis of the main body are both greater than the radius of the spring.

[0010] Further, an upper arc-shaped opening is formed at the top of the top plate, and a lower arc-shaped opening is formed at the top of the bottom plate; the radius of the upper arc-shaped opening and the radius of the lower arc-shaped opening are both greater than the radius of the valve core matched with the spring.

[0011] Further, a first lead screw through hole is formed at the position corresponding to the first lead screw of the top plate, and a second lead screw through hole is formed at the position corresponding to the second lead screw of the bottom plate.

[0012] Further, an adjusting spring is connected between the upper supporting seat side and the top surface of the main body, and an adjusting spring is connected between the lower supporting seat side and the bottom surface of the main body.

[0013] Further, the first motor is connected to the bottom of the main body, and the second motor is connected to the top of the main body.

[0014] Further, a third lead screw nut is screwed on the first lead screw, and the third lead screw nut is connected to the main body through a compensation bellows; a fourth lead screw nut is screwed on the second lead screw, and the fourth lead screw nut is connected to the main body through a compensation bellows.

[0015] Further, the self-adapting spring compression device further comprises a controller, the first motor is electrically connected to the controller, and the second motor is electrically connected to the controller.

[0016] The above technical scheme has the following beneficial effects:

[0017] The device can adapt to springs of different specifications and has good universality. The device uses a lead screw driven by a motor to compress or relax the spring, without the need for steel wire lashing, thereby avoiding problems such as steel wire jamming. When the spring is in place at the assembly position, it can be slowly released, without causing uncontrolled and violent rebound of the spring, thereby avoiding damage to related components. Therefore, the scheme can ensure the quality of the assembled product and effectively improve the product qualification rate.

[0018] In addition, the technical scheme has the following characteristics:

[0019] The traditional bundling method cannot accurately control the spring compression amount in advance, thereby causing repeated bundling, which greatly affects the work efficiency. After the technical scheme is adopted, the rotation number (or running time) and rotation direction of the motor can be controlled to adjust the spring compression amount in real time, so that the spring can be easily compressed to an appropriate size, which is more conducive to smoothly completing the spring assembly work and greatly improves the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is a structural schematic view of a self-adaptive spring compression device according to an embodiment of the present application;

[0022] Figure 2 is a working principle schematic view of a self-adaptive spring compression device according to an embodiment of the present application when used for installing a valve core spring;

[0023] The drawings are as follows: 1, top plate; 2, upper bracket side; 3, adjusting spring; 4, main body; 5, first lead screw; 6, compensation bellows; 7, third lead screw nut; 8, lower bracket side; 9, bottom plate; 10, first motor; 11, lower arc-shaped opening; 12, second lead screw through hole; 13, second lead screw nut; 14, second lead screw; 15, fourth lead screw nut; 16, second motor; 17, upper arc-shaped opening; 18, first lead screw through hole; 19, first lead screw nut; 21, valve body; 22, limiting device; 23, spring; 24, valve core. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] For example, Figure 1The utility model discloses an adaptive spring compression device, including upper support and lower support, the upper support includes the horizontal top plate 1 and the upper support side 2 of vertical connection in the lower side of the top plate 1 edge, the lower support includes the horizontal bottom plate 9 and the lower support side 8 of vertical connection in the upper side of the bottom plate 9 edge, still be provided with the main part 4 of plate structure between the upper support and the lower support, first motor 10 and second motor 16 are connected respectively on the main part 4, the first lead screw 5 is connected above the first motor 10, the first lead screw nut 19 is screwed on the first lead screw 5, the first lead screw nut 19 is connected with the upper support side 2, the second lead screw 14 is connected below the second motor 16, the second lead screw nut 13 is screwed on the second lead screw 14, the second lead screw nut 13 is connected with the lower support side 8.

[0026] To solve the foregoing problems, in combination with referring to Figure 2 The utility model discloses an adaptive spring compression device, its top plate 1 and bottom plate 9 are used for clamping spring 23, when spring 23 is placed between the upper support and the upper support, through the controller (not shown in the drawing) to first motor 10 and second motor 16 give the action signal, first motor 10 and second motor 16 begin synchronous rotation, drive first lead screw 5 and second lead screw 14 synchronous rotation, and because two motors are one positive one negative relative arrangement, so first lead screw 5 rotates and will make first lead screw nut 19 together with the upper support move down, second lead screw 14 rotates and will make second lead screw nut 13 together with the lower support move up, thereby from both ends to the inside synchronous contraction, make the spring 23 in the middle be compressed.In this process, by controlling the rotating speed of first motor 10 and second motor 16, the compression speed of spring 23 can also be controlled.

[0027] When spring 23 is compressed to the predetermined length, it is placed in the predetermined assembly position (for example Figure 2 Because of the space limitation inside valve body 21, spring 23 must be pre-compressed before being sleeved outside valve core 24, then the spring is pressed by auxiliary facilities (for example Figure 2 Nut-shaped limiting device 22 in the middle), then the two motors are synchronously reversed, so that first lead screw 5 and second lead screw 14 are also reversed, at this time, second lead screw nut 13 together with the lower support slowly moves down, first lead screw nut 19 together with the upper support slowly moves up, and spring 23 controllably slowly recovers height, when the distance between bottom plate 9 and top plate 1 is greater than the height of spring 23, the adaptive spring compression device can be pulled out from the side, so that it is separated from spring 23, and the adaptive spring compression device is taken out from valve body 21, at this time, the spring pre-assembly work is completed.

[0028] In this process, compared with the prior art, the technical scheme has the following outstanding advantages:

[0029] 1. The spring is compressed or released by a lead screw driven by a motor. After compression, the spring 23 together with the adaptive spring compression device is placed into the assembly position. Therefore, steel wire is no longer needed for binding, which avoids problems such as steel wire jamming and prevents damage to related components.

[0030] 2. Once the spring 23 is in place and the limiting device 22 is in position, the spring 23 can be slowly released by rotating the lead screw. Unlike existing technologies, the spring 23 will not violently rebound when the wire is cut, thus reducing or even completely avoiding the probability of damage to the limiting device 22 and other components. This ensures the quality of the assembled product and effectively improves the product qualification rate.

[0031] 3. Traditional binding methods cannot precisely control the spring compression in advance, resulting in repeated binding and significantly impacting work efficiency. However, with this technical solution, the compression of spring 23 is directly proportional to the stroke of the lead screw nut (including the first lead screw nut 19 and the second lead screw nut 13), and the stroke of the lead screw nut is directly proportional to the number of rotations of the motor. Furthermore, the forward and reverse rotation of the motor allows for the forward and reverse movement of the lead screw nut, respectively. Therefore, by controlling the number of motor rotations (or running time) and the direction of rotation, the compression of spring 23 can be adjusted in real time, easily compressing spring 23 to the appropriate size. This facilitates smooth spring assembly and significantly improves work efficiency.

[0032] It should be noted that during application, the upper and lower supports are only used to clamp the spring 23, not to press against the upper and lower ends of the spring 23 respectively. That is, the top plate 1 presses down on the second turn of the spring 23, and the bottom plate 9 presses down on the second-to-last turn of the spring 23 from the bottom. In this way, when the compressed spring 23 is placed in the assembly position, the top of the spring 23 is pressed down by the limiting device 22, and the bottom of the spring 23 is supported by the valve seat and other components. At this time, after the lead screw reverses, the top plate 1 and the bottom plate 9 no longer clamp the spring 23, and the top plate 1 and the bottom plate 9 can be easily pulled out to separate from the spring 23.

[0033] Further, although the adaptive spring compression device can have various shapes, for example, the top plate 1, the main body 4, and the bottom plate 9 can be square plates, and the lower bracket side edge 8 and the upper bracket side edge 2 can be right-angled bent shapes provided along the edges of the top plate 1 and the main body 4 (one side needs to be open to accommodate the spring 23), considering that the spring 23 is generally cylindrical in structure, in order to better adapt to the shape of the spring, the preferred form of the upper bracket, the lower bracket, and the main body 4 is that the top plate 1 and the bottom plate 9 are sector plates with the same radius and the same central angle, the upper bracket side edge 2 is connected below the arc-shaped edge of the top plate 1, and the lower bracket side edge 8 is connected above the arc-shaped edge of the bottom plate 9; the main body 4 is a hollow cylindrical structure with one side open, enclosed by an arc-shaped plate, and the central angle of the arc-shaped plate corresponds to the central angle of the sector plate, and the radius of the arc of the arc-shaped plate is the same as the radius of the sector plate; the radius of the sector plate is greater than the radius of the spring 23.

[0034] Further, in order to simplify processing and make it more convenient to use, the most preferred way is to make the central angle of the sector plate 180°, at which time the central angle of the arc-shaped plate used to constitute the main body 4 is also 180°, that is, at this time, the overall structure presents a half-cut cylindrical structure, and the lower bracket side edge 8, the upper bracket side edge 2, and the main body 4 are all coaxial with the spring 23.

[0035] Further, when the overall structure is a half-cylindrical structure, the motor, lead screw, and other structures can be connected to the outside of the cylindrical structure, but in order to save space and facilitate application, the first motor 10 and the second motor 16 are preferably located on the inside of the main body 4; at this time, in order to avoid interference with the spring 23, the distance between the first motor 10 and the axis of the main body 4 and the distance between the second motor 16 and the axis of the main body 4 are both greater than the radius of the spring 23.

[0036] Further, an upper arc-shaped opening 17 is provided at the top of the top plate 1, and a lower arc-shaped opening 11 is provided at the top of the bottom plate 9; the radius of the upper arc-shaped opening 17 and the radius of the lower arc-shaped opening 11 are both greater than the radius of the spool 24 matched with the spring 23. The diameters of the upper arc-shaped opening 17 and the lower arc-shaped opening 11 can be the same or different, but they should both be greater than the radius of the spool 24, so that the spring 23 can be sleeved outside the spool 24 to achieve positioning of the spring 23.

[0037] Further, the top plate 1 is provided with a first screw rod through hole 18 corresponding to the position of the first screw rod 5, and the bottom plate 9 is provided with a second screw rod through hole 12 corresponding to the position of the second screw rod 14. When the compression stroke of the spring 23 is long, the top of the first screw rod 5 may be in contact with the top plate 1, or even need to pass through the top plate 1, and correspondingly, the bottom of the second screw rod 14 may be in contact with the bottom plate 9, or even need to pass through the bottom plate 9 from below, so it is necessary to provide corresponding screw rod through holes, and the hole diameter of the screw rod through hole is larger than the outer diameter of the corresponding screw rod.

[0038] Further, the upper support side 2 and the top surface of the main body 4 are connected by an adjusting spring 3, and the lower support side 8 and the bottom surface of the main body 4 are connected by the adjusting spring 3. Preferably, three adjusting springs 3 are respectively arranged between the upper support and the main body 4 and between the lower support and the main body 4. The upper support and the main body 4 are connected by the adjusting spring 3, and the lower support and the main body 4 are connected by the adjusting spring 3. The upper support can be inclined relative to the main body 4, and the lower support can be inclined relative to the main body 4, both having a certain angle compensation capability, so as to adjust the posture of the upper support and the lower support during the compression of the adjusting spring, so as to adapt to springs 23 of different specifications (left-handed or right-handed).

[0039] Further, as described above, the upper support and the lower support can be inclined relative to the main body 4, and therefore certain requirements are also put forward for the screw rod. If the length of the screw rod is too short, due to the connection of the first screw rod nut 19 with the upper support side 2 and the connection of the second screw rod nut 13 with the lower support side 8, it is difficult for the screw rod to deform enough to meet the above-mentioned inclination requirement under the condition that the end far from the motor is fixed. Therefore, the first motor 10 can be connected to the bottom of the main body 4, and the second motor 16 can be connected to the top of the main body 4, so as to maximize the length of the screw rod.

[0040] Further, simply lengthening the length of the screw rod may still not achieve good inclination compensation effect, and therefore in the technical solution, a third screw rod nut 7 is screwed on the first screw rod 5, and the third screw rod nut 7 is connected to the main body 4 through a compensation bellows 6; a fourth screw rod nut 15 is screwed on the second screw rod 14, and the fourth screw rod nut 15 is connected to the main body 4 through another compensation bellows 6. The deformation amplitude of the compensation bellows 6 is large, which can meet the requirement of larger compensation, so as to adapt to the adjustment of the posture of the screw rod.

[0041] Further, the self-adaptive spring compression device further comprises a controller, the first motor 10 is electrically connected with the controller, and the second motor 16 is electrically connected with the controller. In application, whether the spring 23 is compressed or released, the first motor 10 and the second motor 16 need to act synchronously.

[0042] In the detailed description above, various features are grouped together in single embodiments for the purpose of streamlining the disclosure. This method of disclosure, however, is not to be interpreted as reflecting a necessity to more features than are expressly recited in each claim. Rather, inventive embodiments can lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate preferred embodiment.

[0043] The disclosed embodiments are to be considered as illustrative of the principles of the present application and are not to be considered as limiting the scope of the application. It is the object of the appended claims to define the scope of the application. Various modifications, changes, omissions, and additions to the specific embodiments disclosed herein can be made without departing from the spirit and scope of the application.

[0044] The above detailed description has shown, described, and pointed out the aspects of the application in sufficient detail that others skilled in the art can practice the application. It is understood that various modifications, substitutions, and changes can be made to the disclosed embodiments without departing from the intended scope of the application, as defined by the following claims. Accordingly, the application is not to be restricted based on the disclosure that has been provided.

Claims

1. An adaptive spring compression device, characterized by, The upper bracket includes a horizontal top plate (1) and an upper bracket side edge (2) connected to the lower edge of the top plate (1), and the lower bracket includes a horizontal bottom plate (9) and a lower bracket side edge (8) connected to the upper edge of the bottom plate (9), and a plate-shaped main body (4) is arranged between the upper bracket and the lower bracket. A first motor (10) and a second motor (16) are connected to the main body (4) respectively, a first lead screw (5) is connected to the upper portion of the first motor (10), a first lead screw nut (19) is screwed on the first lead screw (5), the first lead screw nut (19) is connected to the upper bracket side edge (2), a second lead screw (14) is connected to the lower portion of the second motor (16), a second lead screw nut (13) is screwed on the second lead screw (14), and the second lead screw nut (13) is connected to the lower bracket side edge (8).

2. The self-adapting spring compression device of claim 1, wherein, The top plate (1) and the bottom plate (9) are sector plates with the same radius and the same central angle, the upper bracket side edge (2) is connected to the lower edge of the arc-shaped edge of the top plate (1), and the lower bracket side edge (8) is connected to the upper edge of the arc-shaped edge of the bottom plate (9). The main body (4) is a hollow cylindrical structure with one side open, which is enclosed by an arc-shaped plate, and the central angle of the arc-shaped plate is the same as that of the sector plate, and the radius of the arc of the arc-shaped plate is the same as that of the sector plate. The radius of the sector plate is greater than the radius of the spring (23).

3. The self-adapting spring compression device of claim 2, wherein, The central angle of the sector plate is 180°.

4. The self-adapting spring compression device of claim 2, wherein, The first motor (10) and the second motor (16) are located on the inner side of the main body (4), the distance between the first motor (10) and the axis of the main body (4) and the distance between the second motor (16) and the axis of the main body (4) are both greater than the radius of the spring (23).

5. The self-adapting spring compression device of claim 4, wherein, An upper arc-shaped opening (17) is formed at the vertex of the top plate (1), and a lower arc-shaped opening (11) is formed at the vertex of the bottom plate (9), the radius of the upper arc-shaped opening (17) and the radius of the lower arc-shaped opening (11) are both greater than the radius of the spool (24) matched with the spring (23).

6. The self-adapting spring compression device of claim 4, wherein, A first lead screw through hole (18) is formed at the position of the first lead screw (5) of the top plate (1), and a second lead screw through hole (12) is formed at the position of the second lead screw (14) of the bottom plate (9).

7. The self-adapting spring compression device of claim 2, wherein, Adjusting springs (3) are connected between the upper bracket side edge (2) and the top surface of the main body (4), and adjusting springs (3) are connected between the lower bracket side edge (8) and the bottom surface of the main body (4).

8. The self-adapting spring compression device of claim 7, wherein, The first motor (10) is connected to the bottom of the main body (4), and the second motor (16) is connected to the top of the main body (4).

9. The self-adapting spring compression device of claim 8, wherein, The first screw rod (5) is also screwed with a third screw rod nut (7), the third screw rod nut (7) is connected with the main body (4) through a compensation bellows (6); the second screw rod (14) is also screwed with a fourth screw rod nut (15), the fourth screw rod nut (15) is connected with the main body (4) through a compensation bellows (6).

10. The self-adapting spring compression device of any one of claims 1-9, wherein, Also include a controller, the first motor (10) is electrically connected with the controller, the second motor (16) is electrically connected with the controller.

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