Shaft rod straightening mechanism

Abstract

The utility model belongs to the field of straightening tools and instruments, and relates to a shaft rod straightening mechanism which comprises four lead screws, a supporting plate, a jack, a lower top plate, an upper top plate and four springs, external threads are manufactured on the upper sections and the lower sections of the lead screws, and the middle sections of the lead screws are not provided with threads. The four lead screws penetrate through the supporting plate, and the supporting plate is fixed through four lower fastening bolts. The jack is fixedly arranged on the top surface of the supporting plate; the lower top plate is arranged above the jack, and the lower top plate can move on the unthreaded section of the lead screw; the upper top plate is located above the lower top plate and fixed through four upper fastening bolts. And the four springs are respectively sleeved on the four lead screws between the upper top plate and the lower top plate. The shaft bar is arranged on the top face of the lower top plate, the jack drives the lower top plate to ascend to approach the upper top plate, and the shaft bar is straightened through extrusion of the upper top plate and the lower top plate.

Description

Technical Field

[0001] The utility model belongs to the field of straightening tools, in particular to a shaft rod straightening mechanism. Background Art

[0002] For shaft rod connectors used at high temperatures and rotating repeatedly, local deformation of the shaft rod will occur to varying degrees. After deformation, obvious shaking will occur during rotation, affecting the operation effect and resulting in a high replacement frequency.

[0003] CN220461803U discloses a roll pressing device for bar straightening, including a roll pressing structure and a bearing bracket. Both ends of the two roll pressing structures are movably connected to the bearing bracket. The roll pressing structure located above includes a roll shaft, a first roller and a second roller. The surface of the shaft body of the roll shaft is symmetrically provided with screw holes arranged in an annular array along the axis core from the center, and the first roller is fixedly connected to the roll shaft by the threaded connection of the lower end of the fixing screw inside the screw hole. Both ends of the roll shaft located above are rotatably connected inside the first movable bearing and the second movable bearing. Both ends of the roll shaft located below are rotatably connected to the first bearing bracket and the second bearing bracket. The middle position at the bottom of the second bearing bracket is fixedly connected with a sliding strip along the radial direction of the roll shaft. When using the roll pressing device for bar straightening, first, a plurality of roll pressing devices for bar straightening are linearly installed on the designated production line and the driving device is connected to the driving gear. Then, a suitable roller is selected according to the radius of the bar. Then, the bar is pushed to the roll pressing groove of the first roller or the second roller, and the first roller driven by the driving device will cooperate with the second roller to perform roll pressing transmission on the bar. After being roll pressed by a plurality of roll pressing devices, the straightening of the bar can be completed. After a long time of roll pressing operation, the roller needs to be replaced.

[0004] The above patent uses the roll pressing method to straighten the bar. The problems are: 1. The operation is cumbersome and a suitable roller needs to be selected according to the radius of the bar; 2. The equipment maintenance is troublesome and the roller needs to be replaced regularly. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a shaft rod straightening mechanism with a scientific and reasonable structural design, which is convenient for operation and maintenance.

[0006] The technical solution adopted by the utility model to solve the technical problem is:

[0007] The utility model provides a straightening mechanism for a shaft rod, which comprises: four lead screws, a support plate, a jack, a lower top plate, an upper top plate, and four springs. External threads are made on the upper and lower sections of the lead screws, and there is no thread in the middle section. The four lead screws are symmetrically arranged at the four corners of the support plate. The four lead screws pass through the support plate, and the support plate is fixed by four lower fastening bolts. The jack is fixedly installed on the top surface of the support plate. The lower top plate is placed above the jack. The four lead screws pass through the four corners of the lower top plate, and the lower top plate can move on the threadless section of the lead screws. The upper top plate is located above the lower top plate. The four lead screws pass through the four corners of the upper top plate, and the upper top plate is fixed by four upper fastening bolts. The four springs are respectively sleeved on the four lead screws between the upper top plate and the lower top plate. The shaft rod is placed on the top surface of the lower top plate. The jack drives the lower top plate to rise and approach the upper top plate, and the straightening of the shaft rod is realized through the extrusion between the upper top plate and the lower top plate.

[0008] Further, it further comprises a shaft rod limiting member, and the shaft rod limiting member is installed on the top surface of the lower top plate.

[0009] Further, the shaft rod limiting member is composed of a plurality of limiting blocks and two chutes. The two chutes are made on the top surface of the lower top plate in parallel at intervals. The limiting blocks are slidably installed in the chutes, and the shaft rod is placed between the two chutes.

[0010] Further, the jack is a vertical manual hydraulic jack.

[0011] Further, a base is installed at the bottom of each of the four lead screws.

[0012] Further, the upper top plate, the lower top plate and the support plate are made of steel plates with a thickness of 8 - 15 mm.

[0013] The advantages and positive effects of the utility model are:

[0014] 1. In the utility model, the jack drives the lower top plate to rise and approach the upper top plate, and the straightening of the shaft rod is realized through the extrusion between the upper top plate and the lower top plate. There is a large operating space between the upper and lower top plates, and the operation is flexible and controllable. It is not necessary to select and match suitable rollers or replace rollers, and the maintenance is convenient.

[0015] 2. The utility model adopts lead screw support, and the installation positions of the upper top plate and the support plate on the lead screws can be adjusted according to the use requirements.

[0016] 3. The utility model further comprises a limiting member, which can better fix the position of the shaft rod and avoid deviation. Description of the Drawings

[0017] Figure 1 is a three-dimensional structure diagram of the utility model;

[0018] Figure 2 It is the top view of the lower top plate. Specific embodiments

[0019] The present utility model will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not restrictive, and the protection scope of the present utility model cannot be limited thereby.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] Such as Figure 1-2 shown, a shaft rod straightening mechanism includes: four lead screws 7, a support plate 9, a jack 8, a lower top plate 6, an upper top plate 1 and four springs 4. External threads are provided on the upper and lower sections of the lead screw 7, and there is no thread in the middle section.

[0022] The upper top plate 1, the lower top plate 6 and the support plate 9 are sequentially arranged on the four lead screws 7 from top to bottom. The upper top plate 1, the lower top plate 6 and the support plate 9 are parallel and spaced apart by a certain distance. The four lead screws 7 pass through the four corners of the support plate 9, the upper top plate 1 and the lower top plate 6.

[0023] The upper top plate 1 is fixed to the upper section of the lead screw 7 by an upper locking bolt, and the support plate 9 is fixed to the lower section of the lead screw 7 by a lower locking bolt. According to the use requirements, the installation positions of the upper top plate 1 and the support plate 9 on the lead screw 7 can be adjusted.

[0024] The support plate 9 is used to support the jack 8, and the jack 8 is fixedly installed on the top surface of the support plate 9. As a preferred method, the jack 8 adopts a vertical manual hydraulic jack.

[0025] The jack 8 is used to lift the lower top plate 6. The lower top plate 6 can move on the threadless section of the lead screw 7 through the jack 8. The shaft rod 5 is placed on the top surface of the lower top plate 6. The jack 8 drives the lower top plate 6 to rise and approach the upper top plate 1. Through the extrusion between the upper top plate 1 and the lower top plate 6, the straightening of the shaft rod 5 is achieved.

[0026] In order to improve the tightening force between the upper and lower top plates 6, four springs 4 are further included. The four springs 4 are respectively sleeved on the four lead screws 7 between the upper top plate 1 and the lower top plate 6.

[0027] To limit the position of the shaft rod 5, a shaft rod position limiter is further included, and the shaft rod position limiter is installed on the top surface of the lower top plate 6. As a preferred method, the shaft rod position limiter is composed of a plurality of limit blocks 3 and two sliding grooves 12. The two sliding grooves 12 are formed on the top surface of the lower top plate 6 at parallel intervals. The limit blocks 3 are slidably installed in the sliding grooves 12, and the shaft rod 5 is placed between the two sliding grooves 12.

[0028] To support the lead screw 7, a base 11 is installed at the bottom of each of the four lead screws 7.

[0029] As a preferred embodiment, the upper top plate 1, the lower top plate 6 and the support plate 9 are made of steel plates with a thickness of 8 - 15 mm.

[0030] The usage method of this shaft rod straightening mechanism is as follows:

[0031] First, place the shaft rod 5 to be straightened on the top surface of the lower top plate 6, press the pressing rod of the jack 8 to move the lower top plate 6 upward and approach the upper top plate 1, and straighten the shaft rod 5 by the extrusion of the upper top plate 1 and the lower top plate 6. If the straightening effect is not good at one time, the lower top plate 6 can be lowered, the angle of the shaft rod 5 can be adjusted, and the tightening operation can be repeated until the shaft rod 5 is straightened.

[0032] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the inventive concept, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A shaft rod straightening mechanism, characterized in that: include: Four lead screws (7), wherein the upper and lower sections of the lead screws (7) are provided with external threads, and the middle section is free of threads; A support plate (9), wherein the four lead screws (7) are symmetrically arranged at four corners of the support plate (9), the four lead screws (7) pass through the support plate (9), and the support plate (9) is fixed by four lower fastening bolts (10); A jack (8), wherein the jack (8) is fixedly mounted on the top surface of the support plate (9); A lower top plate (6), the lower top plate (6) being placed above the jack (8), the four lead screws (7) passing through four corners of the lower top plate (6), and the lower top plate (6) being movable on the non-threaded section of the lead screws (7); An upper top plate (1), the upper top plate (1) being located above the lower top plate (6), the four lead screws (7) passing through four corners of the upper top plate (1), and the upper top plate (1) being fixed by four upper fastening bolts (2); Four springs (4), the four springs (4) being respectively mounted on four lead screws (7) between the upper top plate (1) and the lower top plate (6); The shaft rod (5) is placed on the top surface of the lower top plate (6), and the jack (8) drives the lower top plate (6) to rise and approach the upper top plate (1), and the shaft rod (5) is straightened by squeezing the upper top plate (1) and the lower top plate (6).

2. The shaft rod straightening mechanism according to claim 1, characterized in that: It also includes a shaft rod limiting piece, which is installed on the top surface of the lower top plate (6).

3. The shaft rod straightening mechanism according to claim 2, characterized in that: The shaft rod limiting member is composed of a plurality of limiting blocks (3) and two slide grooves (12); the two slide grooves (12) are parallelly spaced apart on the top surface of the lower top plate (6); the limiting blocks (3) are slidably installed in the slide grooves (12); and the shaft rod (5) is placed between the two slide grooves (12).

4. The shaft rod straightening mechanism according to claim 3, characterized in that: The jack (8) is a vertical manual hydraulic jack.

5. The shaft rod straightening mechanism according to claim 4, characterized in that: A base (11) is installed at the bottom of each of the four lead screws (7).

6. The shaft rod straightening mechanism according to claim 5, characterized in that: The upper top plate (1), the lower top plate (6) and the support plate (9) are made of steel plates with a thickness of 8-15 mm.

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