Electric drive type automatic centering lock shaft device

Abstract

The utility model provides an electric drive type automatic centering lock axle device, characterized in that the device comprises X-direction slide rails installed in parallel on both sides of the longitudinal center axis above the base, X-direction bases installed on the X-direction slide rails, Y-direction slide rails installed in parallel on both sides of the transverse center axis above the X-direction bases, Y-direction bases installed on the Y-direction slide rails, X-direction reset springs and Y-direction reset springs for driving the X-direction bases and the Y-direction bases to reset, and a lock axle action execution mechanism installed above the Y-direction bases; the lock axle action execution mechanism comprises two double-rotation screws with opposite rotation directions and with left and right rotation nuts rotatably installed at two ends, the two double-rotation screws are installed in a transverse manner above the Y-direction bases through screw rod support seats and are driven by a power source, two clamping head mechanisms are combined with the positive and negative phase nuts in a relative manner, guide rails are parallelly arranged on both sides of the double-rotation screws, and a supporting slide is used for supporting the clamping head mechanisms and is in sliding fit with the guide rails.

Description

TECHNICAL FIELD

[0001] The present application relates to an electric drive type automatic centering lock shaft device, which can be used for braking and locking of a rotating shaft. TECHNICAL BACKGROUND

[0002] Rotary motion is the most common mechanical action in mechanical equipment, which is applied at all times. For locking of a rotating shaft, the most commonly used method at present is to adopt a pneumatic or hydraulic drive structure to tightly lock the shaft, which needs to be equipped with auxiliary equipment such as an air compressor or a hydraulic station, and the operation is relatively complex, the running is noisy, and the installation position precision is high, otherwise, when the shaft is locked, an additional load will be applied to the shaft, which is easy to damage the supporting bearing of the locked shaft. SUMMARY

[0003] The present application is just to provide an electric drive type automatic centering lock shaft device aiming at the above-mentioned deficiencies in the prior art, which can realize locking of a rotating shaft by driving of one motor, and the lock shaft mechanism can be automatically centered without applying an additional load to the shaft.

[0004] The object of the present application can be achieved by the following technical measures:

[0005] The electric drive type automatic centering lock shaft device of the present application comprises X-direction slide rails installed in parallel on both sides of the longitudinal center axis above the base, an X-direction base installed on the X-direction slide rails, Y-direction slide rails installed in parallel on both sides of the transverse center axis above the X-direction base, a Y-direction base installed on the Y-direction slide rails, X-direction and Y-direction return springs for driving the X-direction and Y-direction bases to return, and a lock shaft action execution mechanism installed above the Y-direction base; the lock shaft action execution mechanism comprises two end rotating direction opposite double rotating direction screws installed in a transverse manner above the Y-direction base through screw rod support seats and driven by a power source, two clamping head mechanisms combined with positive and negative phase screw nuts in a relative manner, guide rails installed in parallel on both sides of the double rotating direction screws, and a support slide installed in sliding fit with the guide rails and used for supporting the clamping head mechanisms; the two clamping head mechanisms can be driven by the screws to lock and release the locked shaft.

[0006] The clamping head base of the clamping head mechanism is connected with the support slide on both sides of the bottom of the clamping head base, four bushings are embedded in a uniform manner on the vertical surface of the clamping head base, one guide rod is respectively installed in sliding fit in each bushing, and the other end of the guide rod is connected with the arc clamping head through a compression spring.

[0007] The X-axis return spring is installed between the X-axis base and the base, and the Y-axis return spring is installed between the Y-axis base and the X-axis base. When locking the shaft, the shaft locking action actuator can achieve automatic centering. After the shaft is released, the device can return to the initial position under the action of the return spring.

[0008] Specifically, the key technical features of this invention are:

[0009] 1. The lead screw used is a double-headed lead screw with opposite directions of rotation at both ends. The clamping head mechanism can achieve shaft locking and unlocking movements by being driven by a single motor.

[0010] 2. By setting the X-axis and Y-axis motion combination, the locking shaft actuator can achieve automatic centering of the locked shaft;

[0011] Third, by using guide rods and compression springs, a continuous clamping force can be applied to the locked shaft.

[0012] The working principle and beneficial effects of this invention are as follows:

[0013] The drive screw in the locking shaft actuator of this invention is a double-rotating screw with opposite directions of rotation at both ends, one end being left-handed and the other right-handed. Both ends are matched with nuts, and two clamping head mechanisms are respectively connected to the two nuts. When the screw rotates, the two clamping head mechanisms move simultaneously in the direction of approaching or moving away. The device is driven by a single motor, thus achieving locking and unlocking of the locked shaft. A compression spring is incorporated into the clamping head mechanism; after the shaft is locked, the drive motor stops and engages the brake, allowing the compression spring to continuously apply clamping force to the locked shaft. The locking shaft actuator, mounted on the X-axis and Y-axis motion assembly, can achieve two-dimensional planar movement. When the locking shaft and the arc-shaped chuck are not concentric, the shaft will exert X-axis and Y-axis forces on the arc-shaped chuck when clamping the shaft. Under the action of these forces, the uppermost locking shaft actuator will move in the X-axis and Y-axis, ultimately achieving concentric alignment between the locking device and the locked shaft. If the return springs in both directions are compressed or stretched to a certain extent, the device will return to its initial position under the action of the return springs after the shaft is relaxed, preventing interference with the rotating shaft.

[0014] In addition, since the present invention can lock the rotating shaft with a single motor drive, no other external auxiliary equipment is required, the operation and control are simple, and the invention device can automatically center without applying additional load to the shaft, making it highly valuable for widespread application. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 for Figure 1 Side view.

[0017] Figure 3This is a schematic diagram showing the installation of a double-rotating lead screw and a clamping head base.

[0018] Figure 4 This is a schematic diagram of the clamping head mechanism.

[0019] In the diagram: 1 is the base, 2 is the X-axis slide rail, 3 is the X-axis base, 4 is the Y-axis slide rail, 5 is the Y-axis base, 6 is the lead screw support, 7 is the double-rotating lead screw, 7-1 is the right-hand lead screw nut, 7-1 is the left-hand lead screw nut, 8 is the support slide, 9 is the clamping head mechanism, 9-1 is the arc-shaped chuck, 9-2 is the guide rod, 9-3 is the compression spring, 9-4 is the bushing, 9-5 is the clamping head base, 10 is the locked shaft, 11 is the coupling, 12 is the power source, 13 is the Y-axis return spring, and 14 is the X-axis return spring. Detailed Implementation

[0020] The present invention will be further described below with reference to examples and accompanying drawings.

[0021] like Figure 1 , Figure 2 As shown, the electrically driven automatic centering and locking shaft device of the present invention includes an X-direction slide rail 2 mounted in parallel on both sides of the longitudinal central axis above the base 1, an X-direction base 3 mounted on the X-direction slide rail 2, a Y-direction slide rail 4 mounted in parallel on both sides of the transverse central axis above the X-direction base, a Y-direction base 5 mounted on the Y-direction slide rail, an X-direction return spring 14 and a Y-direction return spring 13 for driving the X-direction base 3 and the Y-direction base 5 to reset, and a locking shaft action actuator mounted above the Y-direction base 5; the locking shaft action actuator includes a double-rotating lead screw 7 (see [reference]) with opposite rotation directions at both ends and screwed with left and right rotating lead screw nuts 7-1 and 7-2, respectively, mounted in a transverse manner above the Y-direction base 5 via lead screw support seats 6 and driven by a power source 12. Figure 3 The device consists of two clamping head mechanisms 9 that are respectively coupled to the positive and negative screw nuts in a relatively arranged manner, guide rails arranged parallel to both sides of the double-rotation screw, and a support slide 8 that slides with the guide rails to support the clamping head mechanisms; when the double-rotation screw rotates, the two clamping head mechanisms move simultaneously in the direction of approaching or moving away. The device is driven by a single motor, which can realize the locking and unlocking of the locked shaft 10.

[0022] The X-direction return spring 14 is installed between the X-direction base 3 and the base 1, and the Y-direction return spring 13 is installed between the Y-direction base 5 and the X-direction base 3. When locking the shaft, the shaft locking action actuator can achieve automatic centering. After the shaft is released, the device can return to the initial position under the action of the return spring.

[0023] The clamping head mechanism 9 has a clamping head base connected to the support slide 8 on both sides of its bottom. Four bushings 9-4 are evenly distributed on the vertical surface of the clamping head base. A guide rod 9-2 is slidably fitted into each bushing. The other end of the guide rod 9-2 passes through a compression spring 9-3 and connects to the arc-shaped chuck 9-1 (see...). Figure 4 After the shaft is locked, the compression spring is compressed, the drive motor stops and the brake is engaged. The compression spring can continuously apply clamping force to the locked shaft 10. In specific implementations, other elastic elements such as disc springs can also be used instead of the compression spring. When the locked shaft 10 and the arc-shaped chuck 9-1 are not concentric, the shaft will exert X and Y component forces on the arc-shaped chuck when the shaft is clamped. Under the action of the force, the uppermost shaft locking actuator of the device will move in the X and Y directions, eventually achieving the centering and concentricity of the locking device and the locked shaft 10. At this time, if the return springs in the X and Y directions have a certain amount of compression or tension, after the locked shaft 10 is released, the device returns to the initial position under the action of the return spring, preventing interference with the rotating shaft.

Claims

1. An electrically driven automatic centering and locking shaft device, characterized in that: The device includes an X-axis slide rail (2) mounted in parallel on both sides of the longitudinal central axis above the base (1), an X-axis base (3) mounted on the X-axis slide rail (2), a Y-axis slide rail (4) mounted in parallel on both sides of the transverse central axis above the X-axis base, a Y-axis base (5) mounted on the Y-axis slide rail, an X-axis return spring (14) and a Y-axis return spring (13) for driving the X-axis base (3) and the Y-axis base (5) to reset, and a locking shaft action actuator mounted above the Y-axis base (5); the locking shaft action actuator includes a double-rotating lead screw (7) with opposite rotation directions at both ends and screwed with left and right rotating lead screw nuts, which are mounted in a transverse manner above the Y-axis base (5) through lead screw support seats (6) and driven by a power source (12), and connected to the positive and negative lead screw nuts respectively in a relatively arranged manner. The two clamping head mechanisms (9) are arranged in parallel on the guide rails on both sides of the double-rotating screw, and the support slide (8) is slidably engaged with the guide rails to support the clamping head mechanism; the bottom sides of the clamping head base of the clamping head mechanism (9) are respectively connected to the support slide (8), and four bushings (9-4) are evenly embedded on the vertical surface of the clamping head base. A guide rod (9-2) is slidably installed in each bushing. The other end of the guide rod (9-2) passes through the compression spring (9-3) and is connected to the arc-shaped chuck (9-1); the X-direction return spring (14) is installed between the X-direction base (3) and the base (1), and the Y-direction return spring (13) is installed between the Y-direction base (5) and the X-direction base (3). When locking the shaft, the shaft locking action actuator can achieve automatic centering. After the shaft is released, the device can return to the initial position under the action of the return spring.

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