A clamp for clamping a stator

Abstract

A clamp for clamping a stator, comprising: a self-rotating shaft rod with a hollow structure, a clamp fixing plate installed at one end of the self-rotating shaft rod, characterized in that: a plurality of rotatable clamp feet are installed on the clamp fixing plate, and a limiting groove of a U-shaped structure is provided on one side of the clamp foot; a movable push rod is installed inside the self-rotating shaft rod, a screw rod is installed at one end of the push rod, and the push rod and the screw rod are connected by a thread, and the rotation of the screw rod can synchronously drive the push rod to move up and down in the self-rotating shaft rod, and the other end of the push rod is provided with a clamping part that is mutually engaged with the limiting groove; this scheme mainly solves the problem that the existing clamp cannot be used for clamping stators of various different inner diameters and different lengths, and solves the problem that the clamping of the existing clamp is unstable and inconvenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of clamping fixtures, and in particular to a fixture for clamping a stator. Background Art

[0002] With the rapid development of automobiles, in order to meet the requirements of automobile generator stator insulation treatment, the stator is mainly fixed on a fixture for insulation treatment. The stators of different generators have different lengths and inner diameters. The existing fixture can only clamp stators of a single size and cannot be applied to stators of various inner diameters. The applicable scope of the fixture is small and the clamping is inconvenient. When the inner diameter of the stator deviates, the stator cannot be clamped stably. The existing fixture has the problems of small applicable scope, poor clamping stability and inconvenient use. Summary of the invention

[0003] The invention aims to solve one of the technical problems in the above-mentioned related technologies at least to some extent.

[0004] To this end, the purpose of the present invention is to provide a clamp for clamping a stator, which mainly solves the problem that the existing clamps cannot be used for clamping stators with different inner diameters and different lengths, and solves the problem that the existing clamps are unstable and inconvenient to use.

[0005] An embodiment of the present invention provides a clamp for clamping a stator, comprising: a self-rotating shaft rod with a hollow structure, a clamp fixing plate being installed at one end of the self-rotating shaft rod, and the characteristic is that: a plurality of rotatable clamp feet are installed on the clamp fixing plate, and a U-shaped limit groove is provided on one side of the clamp foot; a movable push rod is installed inside the self-rotating shaft rod, a screw rod is installed at one end of the push rod, and the push rod and the screw rod are connected by a thread, and the rotation of the screw rod can synchronously drive the push rod to move up and down in the self-rotating shaft rod, and the other end of the push rod is provided with a clamping portion that engages with the limit groove.

[0006] In the aforementioned clamp for clamping the stator, the height of the limiting groove is greater than the height of the clamping portion, and the clamping portion can move up and down in the limiting groove.

[0007] In the aforementioned clamp for clamping the stator, when the push rod moves upward, the engaging portion is located in the limiting groove and presses the clamp foot upward and drives the clamp foot to rotate outward.

[0008] In the aforementioned clamp for clamping the stator, when the push rod moves downward, the engaging portion is located in the limiting groove and presses the clamp foot downward and drives the clamp foot to rotate inward.

[0009] In the aforementioned clamp for clamping the stator, the screw is provided with a first blocking portion for limiting the upward movement of the screw and a second blocking portion for limiting the downward movement of the screw, and the screw is provided with a clearance portion for reducing the rotational friction.

[0010] In the aforementioned fixture for clamping the stator, a groove is arranged on the push rod, and a limit column for limiting the rotation of the push rod in the rotation shaft is correspondingly installed on the rotation shaft.

[0011] In the aforementioned clamp for clamping the stator, the clamping portion is configured as a disc-shaped structure, and the side surface of the clamping portion is configured as an arc-shaped structure.

[0012] In the aforementioned clamp for clamping the stator, the clamp foot is connected to the clamp fixing plate through a pin shaft, and the clamp foot can rotate around the pin shaft.

[0013] In the aforementioned fixture for clamping the stator, the number of the fixture legs is set to three, and the fixture legs are evenly distributed and installed on the fixture fixing plate.

[0014] In the aforementioned clamp for clamping the stator, a clamp foot accessory is installed at the end of the clamp foot.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The scheme of the present invention drives the clamp foot to rotate outward or inward by arranging a push rod to move up and down in the rotating shaft rod, so that the clamp foot can clamp stators with different inner diameters, making the clamp of the scheme more applicable to clamp stators with different inner diameters and more stable in clamping.

[0017] This solution sets the height of the limit groove to be greater than the height of the clamping part, so that the clamping part can move in the limit groove. The ejector rod can drive the fixture foot to rotate during the up and down movement. The rotation angle can be adjusted to be applicable to the clamping of stators with different inner diameters. The ejector rod can be driven to move by twisting the screw rod, which is convenient to use and has high stability.

[0018] This solution provides multiple clamp feet, which form limited clamping for the inner diameter of the stator in multiple directions, eliminating the problem of unstable clamping caused by deviation of the inner diameter of the stator. The clamp of this solution has high stability in clamping the stator and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the main view of this scheme;

[0020] Figure 2 This is a top view of the scheme;

[0021] Figure 3 This is a schematic diagram of the main cross-sectional structure of this scheme;

[0022] Figure 4 This is the diagram for this project;

[0023] Figure 5 This is a partial exploded diagram of the rotating shaft rod of this scheme;

[0024] Figure 6 This is the explosion diagram of this scheme.

[0025] Figure markings: 1-rotating shaft, 101-limiting column, 2-clamp fixing plate, 3-clamp foot, 301-limiting groove, 4-top rod, 401-clamping part, 402-groove, 5-screw, 501-first blocking part, 502-second blocking part, 503-air avoidance part, 6-clamp foot attachment. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0027] Embodiment: A clamp for clamping a stator according to the present invention, such as Figures 1 to 6 The structure is shown in: it includes: a self-rotating shaft rod with a hollow structure, a clamp fixing plate is installed at one end of the self-rotating shaft rod, and a plurality of rotatable clamp feet are installed on the clamp fixing plate, that is, the clamp foot can rotate a certain angle on the clamp fixing plate, and a limiting groove of a U-shaped structure is arranged on one side of the clamp foot; a movable push rod is installed inside the self-rotating shaft rod, a screw is installed at one end of the push rod, and the push rod is connected to the screw by a thread, and the rotation of the screw can synchronously drive the push rod to move up and down in the self-rotating shaft rod, and the other end of the push rod is provided with a clamping part that engages with the limiting groove; by setting the threaded connection between the push rod and the screw, the rotation of the screw is realized to drive the push rod to move up and down linearly, and the rotation of the clamp foot is realized by setting the cooperation of the clamping part and the limiting groove, thereby realizing the adjustment of the clamping range of the clamp foot, which can be suitable for clamping stators with different inner diameters. The clamp foot in this scheme extends out a certain length, which can realize the clamping of stators of different lengths, and the length of the clamp foot can be specifically set according to needs.

[0028] The push rod moving structure in this scheme is that the screw rod can only rotate but cannot move up and down. The rotation of the screw rod drives the push rod to move linearly up and down to realize the rotation of the clamp foot. The clamp foot is rotated outward by moving the push rod upward, and the clamp foot is rotated inward by moving the push rod downward. The push rod can be moved linearly up and down by simply rotating the screw rod clockwise or counterclockwise. It is more convenient to use and safer and more reliable.

[0029] In this solution, in order to realize that the engaging part can move in the limiting groove, the height of the limiting groove is set to be greater than the height of the engaging part, and the engaging part can move up and down in the limiting groove. Only when the engaging part moves up and down in the limiting groove can the clamp foot be pressed upward and driven to rotate outward and the clamp foot be pressed downward and driven to rotate inward. The height of the limiting groove can be set according to different clamping requirements. The higher the height of the limiting groove, the greater the distance that the engaging part can move up and down in the limiting groove, the greater the angle that the clamp foot can rotate, and the greater the inner diameter range of the stator that can be clamped. On the contrary, the smaller the height of the limiting groove, the smaller the distance that the engaging part can move up and down in the limiting groove, the smaller the angle that the clamp foot can rotate, and the smaller the inner diameter range of the stator that can be clamped. It can be seen that the height of the limiting groove can be set according to different clamping requirements to realize the clamping of stators with different inner diameters. This makes the clamp of this solution have a wider application range.

[0030] The moving structure of the push rod of this scheme is that when the screw rotates clockwise, the screw drives the push rod to move upward; when the push rod moves upward, the engaging portion is located in the limiting groove and presses the clamp foot upward and drives the clamp foot to rotate outward, that is, the engaging portion presses the clamp foot upward in the limiting groove, causing the clamp foot to rotate outward, and a stator with a large inner diameter can be clamped at this time.

[0031] The moving structure of the push rod of this scheme is that when the screw rotates counterclockwise, the screw drives the push rod to move downward; when the push rod moves downward, the engaging portion is located in the limiting groove and presses the clamp foot downward and drives the clamp foot to rotate inward, that is, the engaging portion presses the clamp foot downward in the limiting groove, causing the clamp foot to rotate inward, and a stator with a small inner diameter can be clamped at this time.

[0032] The screw of the present invention drives the push rod to move up and down during the rotation process. In order to prevent the screw from moving up and down, a first blocking portion that limits the upward movement of the screw and a second blocking portion that limits the downward movement of the screw are arranged on the screw. The end face of the rotating shaft is between the first blocking portion and the second blocking portion, so that the end face of the rotating shaft limits the upward movement of the screw. The screw can only rotate inside the rotating shaft but cannot move up and down. When the screw rotates, the external thread on the screw and the internal thread in the push rod are threadedly connected to each other and the movement of the push rod is achieved through the thread. In order to reduce the friction force of the screw rotating around the rotating shaft, a gap avoiding portion that reduces the rotational friction force is provided on the screw. The gap avoiding portion reduces the contact area between the outer surface of the screw and the hollow inner surface of the rotating shaft, thereby reducing the friction force of the screw rotation.

[0033] In order to prevent the push rod from rotating due to the rotation of the screw, a groove is provided on the push rod, and a limit column is correspondingly installed on the rotating shaft rod for limiting the rotation of the push rod in the rotating shaft rod. The limit column is installed in the column hole on the rotating shaft rod so that the limit column is located in the groove, which can prevent the push rod from rotating in the rotating shaft rod, so that the push rod can only move up and down but not rotate in the rotating shaft rod, thereby realizing the up and down linear movement of the push rod; preferably, two symmetrical grooves are provided on the outer side surface of the push rod, and two limit columns are correspondingly provided on the rotating shaft rod, so that the limit column is located in the groove to limit the rotation of the push rod; the length of the groove on the push rod in this scheme is greater than the movable distance of the push rod, so that the limit column is always in the groove during the up and down movement of the push rod, thereby realizing the effect of limiting the rotation of the push rod.

[0034] In this scheme, the engaging part is preferably set to a disc-shaped structure, and the engaging part of the disc-shaped structure is set to an integrated structure, so that the engaging part of the disc-shaped structure can move in the limiting groove in each clamp foot, ensuring the consistency of the rotation of each clamp foot driven by the push rod, and multiple clamp feet can rotate synchronously with higher stability; in order to facilitate the movement of the engaging part in the limiting groove, the side surface of the engaging part is preferably set to a circular arc structure, which reduces the friction between the engaging part and the limiting groove, so that the engaging part can move up and down smoothly in the limiting groove.

[0035] The clamp foot of the present scheme is rotatable, mainly because the clamp foot is connected to the clamp fixing plate by a pin shaft, and the clamp foot can rotate around the pin shaft. Pin holes are respectively set on the clamp foot and the clamp fixing plate, and the installation pin shaft passes through the pin hole, so that the clamp foot can rotate through the pin shaft. When the push rod moves, the engaging part on the push rod moves in the limiting groove, so that the clamp foot can rotate around the pin shaft, thereby adjusting the clamping range of the clamp foot so as to be suitable for clamping and fixing stators with different inner diameters, that is, the rotation of the clamp foot realizes the adjustment of the clamping range of the clamp foot.

[0036] Preferably, the number of clamp feet in this solution is set to three, and the clamp feet are evenly distributed and installed on the clamp fixing plate. The three clamp feet are distributed in a triangular structure. The triangular distribution structure is stable, so that the clamp feet can clamp the stator in three directions and exert force, and the clamping stability is higher.

[0037] Optionally, the end of the clamp foot of this solution is equipped with a clamp foot accessory, which mainly fits the inner diameter of the stator. The clamp foot accessory can be set as a soft silicone or silicone rubber structure, so that the clamp foot accessory can play a certain role in anti-slip and buffering force, and the clamping is safer and more reliable.

[0038] Working principle: The scheme of the present invention realizes the outward or inward rotation of the clamp foot by setting a push rod to move up and down in the rotating shaft rod. It mainly sets a threaded connection between the push rod and the screw rod, realizes the rotation of the screw rod to drive the push rod to move up and down linearly, and realizes the rotation of the clamp foot by setting the cooperation of the clamping part and the limit groove, thereby realizing the adjustment of the clamping range of the clamp foot. When the push rod moves upward, the clamping part is located in the limit groove and presses the clamp foot upward and drives the clamp foot to rotate outward. When the push rod moves downward, the clamping part is located in the limit groove and presses the clamp foot downward and drives the clamp foot to rotate inward. This makes the clamp of this scheme have a wider range of application for clamping stators with different inner diameters, and the clamping is more stable, safe and reliable.

[0039] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made in form and detail without departing from the spirit and scope of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A fixture for clamping a stator, comprising: A self-rotating shaft rod with a hollow structure, one end of which is equipped with a clamp fixing plate, characterized in that: a plurality of rotatable clamp feet are installed on the clamp fixing plate, and a limiting groove of a U-shaped structure is provided on one side of the clamp foot; a movable push rod is installed inside the self-rotating shaft rod, one end of the push rod is installed with a screw rod, and the push rod and the screw rod are connected by a thread, and the rotation of the screw rod can synchronously drive the push rod to move up and down in the self-rotating shaft rod, and the other end of the push rod is provided with a clamping part that engages with the limiting groove; the height of the limiting groove is greater than the height of the clamping part, and the clamping part can move up and down in the limiting groove; when the push rod moves upward, the clamping part is located in the limiting groove and presses the clamp foot upward and drives the clamp The clamp foot rotates outward; when the push rod moves downward, the engaging portion is located in the limit groove and presses the clamp foot downward and drives the clamp foot to rotate inward; the screw rod is provided with a first blocking portion that limits the upward movement of the screw rod and a second blocking portion that limits the downward movement of the screw rod; a groove is provided on the push rod, and a limit column is correspondingly installed on the rotating shaft rod to limit the rotation of the push rod in the rotating shaft rod; the clamp foot is connected to the clamp fixing plate by a pin shaft, and the clamp foot can rotate around the pin shaft; the number of clamp feet is set to three, and the clamp feet are evenly distributed and installed on the clamp fixing plate; a clamp foot accessory is installed at the end of the clamp foot, and the clamp foot accessory is a soft silicone or silicone rubber structure.

2. A stator clamp according to claim 1, characterized in that: The screw rod is provided with a clearance portion for reducing the rotational friction.

3. A stator clamp according to claim 2, characterized in that: The engaging portion is configured as a disc-shaped structure, and the side surface of the engaging portion is configured as an arc-shaped structure.

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