Automatic centering clamping mechanism with self-locking

Abstract

The present invention relates to the field of mechanical processing technology, and in particular to an automatic centering clamping mechanism with self-locking. An automatic centering clamping mechanism with self-locking includes a centering clamping machine base, a support plate is welded on the centering clamping machine base, a centering assembly is provided at the outer end of the support plate, and clamping assemblies are provided on both sides of the support plate. The power of this automatic centering clamping mechanism with self-locking comes entirely from the motor. During the clamping process, the force is transmitted to the connecting rod mechanism through the worm gear, and the connecting rod mechanism then transmits the force to the clamping wedge block, which clamps the workpiece through the clamping wedge block. The worm gear itself has good self-locking performance, which serves the purpose of self-locking. The connecting rod mechanism achieves self-locking by passing the dead point and ensures that the clamping force becomes larger and larger, providing sufficient force to ensure that the clamping is in place.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to an automatic centering clamping mechanism with self-locking function. Background Art

[0002] The existing centering clamping mechanism is a manual clamping mechanism, which is clamped by manually turning the screw to transmit the force to the pressure plate. This method is difficult to ensure that the clamping is in place when a large pressure is required. Centering is also achieved by manually rotating the hand wheel and pushing the top block through the screw. This method requires a lot of thrust for larger workpieces, and it is difficult to manually turn the hand wheel, making it difficult to center and ensure that the clamping is in place. The existing mechanism takes a long time to clamp, and the manual tightening force is large and difficult to ensure that it is in place, and the product qualification rate cannot be guaranteed. The clamping depends entirely on the thread, which is prone to failure after long-term use. Summary of the invention

[0003] In order to overcome the shortcomings of the existing centering clamping mechanism, the present invention provides an automatic centering clamping mechanism with self-locking function.

[0004] The technical solution adopted by the present invention to solve its technical problem is: an automatic centering clamping mechanism with self-locking, including a centering clamping machine base, a support plate welded on the centering clamping machine base, a centering assembly at the outer end of the support plate, and clamping assemblies on both sides of the support plate.

[0005] According to another embodiment of the present invention, it further includes that the centering assembly includes a centering motor, the centering motor is connected to a centering reducer, the centering reducer is connected to a screw through a centering coupling, both sides of the screw are installed in bearings in a centering seat, the centering seat is fixed to the center clamping machine base by bolts, there are two sets of T-nuts on the screw, and a top block is installed above the T-nut by bolts.

[0006] According to another embodiment of the present invention, the support plate further comprises grooves on both sides for the T-nuts to move.

[0007] According to another embodiment of the present invention, it further includes that the clamping assembly includes a clamping motor, the clamping motor is connected to a clamping reducer, the clamping reducer is connected to the worm gear lift through a clamping coupling, the upper end of the worm gear lift is provided with a connecting rod 1, the opening at the upper end of the connecting rod 1 is movably connected to the connecting rod 2 and the connecting rod 3 through a shaft, the tail end of the connecting rod 2 is movably connected to the connecting rod seat through a shaft, the connecting rod 3 is movably connected to the wedge block through the shaft, and the wedge block is embedded in the wedge groove.

[0008] According to another embodiment of the present invention, the connecting rod seat is further fixed to the connecting rod seat bracket by bolts, and the connecting rod seat bracket is installed on the centering clamping machine base by bolts.

[0009] According to another embodiment of the present invention, the wedge block further comprises an open groove at the tail end, and protruding bumps at both ends of the connecting rod.

[0010] The beneficial effect of the present invention is that the power of the automatic centering clamping mechanism with self-locking comes entirely from the motor. During the clamping process, the force is transmitted to the connecting rod mechanism through the worm gear, and the connecting rod mechanism then transmits the force to the clamping wedge block. The workpiece is clamped by the clamping wedge block. The worm gear itself has good self-locking performance and serves the purpose of self-locking. The connecting rod mechanism achieves self-locking by passing the dead point and ensures that the clamping force becomes larger and larger, providing sufficient force to ensure that the clamping is in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] Figure 2 is a top view of the present invention;

[0014] Figure 3 It is a schematic diagram of the mechanism of the centering assembly of the present invention;

[0015] Figure 4 The present invention Figure 3 A top view of

[0016] Figure 5 is a schematic structural diagram of the clamping assembly of the present invention;

[0017] Figure 6 The present invention Figure 5 A top view of

[0018] In the figure, 1, centering clamping machine base, 2, support plate, 3, centering assembly, 4, clamping assembly, 5, connecting rod seat bracket, and 6, workpiece.

[0019] 3-1. Center the motor, 3-2. Center the reducer, 3-3. Center the coupling, 3-4. Center the seat, 3-5. Screw, 3-6. T-nut, 3-7. Top block.

[0020] 4-1, clamping motor, 4-2, clamping reducer, 4-3, worm gear lift, 4-4, connecting rod one, 4-5, connecting rod seat, 4-6, connecting rod two, 4-7, connecting rod three, 4-8, wedge groove, 4-9, wedge block, 4-10, groove, 4-11, coupling, 4-12, protrusion. DETAILED DESCRIPTION

[0021] like Figure 1-6It is a structural schematic diagram of the present invention, an automatic centering clamping mechanism with self-locking, including a centering clamping machine base 1, a support plate 2 is welded on the centering clamping machine base 1, a centering assembly 3 is provided at the outer end of the support plate 2, and clamping assemblies 4 are provided on both sides of the support plate 2.

[0022] When this automatic centering clamping mechanism with self-locking function is in use, the centering assembly 3 of the device is used to center the workpiece 6 placed on the support plate 2, that is, the workpiece is placed in the middle of the support plate 2 to ensure the processing accuracy. After the centering is completed, the workpiece 6 is clamped by the clamping assembly to facilitate subsequent processing.

[0023] According to another embodiment of the present invention, it further includes that the centering assembly 3 includes a centering motor 3-1, the centering motor 3-1 is connected to a centering reducer 3-2, the centering reducer 3-2 is connected to a screw 3-5 through a centering coupling 3-3, both sides of the screw 3-5 are installed in bearings in a centering seat 3-4, the centering seat 3-4 is fixed to the center clamping machine base 1 by bolts, there are two sets of T-nuts 3-6 on the screw 3-5, and a top block 3-7 is installed above the T-nut 3-6 by bolts.

[0024] The centering assembly is mainly composed of a centering seat 3-4, a T-nut 3-6, a top block 3-7, a positive and negative thread T-screw, namely, a screw 3-5, a centering coupling 3-3, a worm gear reducer, namely, a centering reducer 3-2, and a centering motor 3-1. The centering motor 3-1 transmits the torque to the positive and negative thread screw 3-5 through the centering reducer 3-2 and the centering coupling 3-3, and drives the T-nut 3-6 through the positive and negative threads on the screw 3-5, and at the same time converts the torque into a force acting on the T-nut 3-6, and then acts on the box beam, namely, the workpiece 6, through the top block 3-7. Since the screw 3-5 adopts positive and negative threads, it ensures that the T-nuts 3-6 on both sides can move synchronously toward the center, thereby ensuring the centering of the box beam.

[0025] The worm gear reducer itself has a self-locking function, so that the centering assembly 3 also has a self-locking function.

[0026] According to another embodiment of the present invention, further comprising: grooves for movement of T-nuts 3 - 6 are provided on both sides of the support plate 2 .

[0027] The groove limits the moving direction of the T-nut 3-6, and it can only move forward and backward along the groove to avoid rotation on the screw 3-5.

[0028] According to another embodiment of the present invention, it further includes that the clamping assembly 4 includes a clamping motor 4-1, the clamping motor 4-1 is connected to a clamping reducer 4-2, the clamping reducer 4-2 is connected to the worm gear lift 4-3 through a clamping coupling 4-11, the worm gear lift 4-3 has a connecting rod 1 4-4 at the upper end, the opening at the upper end of the connecting rod 1 4-4 is movably connected to the connecting rod 2 4-6 and the connecting rod 3 4-7 through an axis, the tail end of the connecting rod 2 4-6 is movably connected to the connecting rod seat 4-5 through an axis, the connecting rod 3 4-7 is movably connected to the wedge block 4-9 through an axis, and the wedge block 4-9 is embedded in the wedge groove 4-8.

[0029] The clamping assembly mainly includes a worm gear reducer, namely a clamping reducer 4-2, a clamping motor 4-1, a wedge block 4-9, a wedge groove 4-8, a clamping coupling 4-11, a worm gear lift 4-3, and a connecting rod mechanism, namely a connecting rod 1 4-4, a connecting rod 2 4-6, and a connecting rod 3 4-7. The clamping motor 4-1 transmits the torque to the worm gear lift 4-3 through the clamping reducer 4-2 and the clamping coupling 4-11, and the worm gear lift 4-3 converts the torque into force, and transmits the force to the connecting rod 1 4-4, the connecting rod 2 4-6, and the connecting rod 3 4-7, and then the connecting rod 1 4-4, the connecting rod 2 4-6, and the connecting rod 3 4-7 transmit the force to the wedge block 4-9, and the wedge block 4-9 converts the horizontal water force into downward pressure directly on the box beam, thereby playing the role of clamping the box beam.

[0030] The worm gear reducer has a self-locking function, so that the centering assembly also has a self-locking function.

[0031] When the clamping assembly clamps the box beam, it is required that the connecting rod 1 4-4, the connecting rod 2 4-6 and the connecting rod 3 4-7 must pass the dead point, so that the box beam can be effectively clamped and will not be easily loosened. In addition, the connecting rod 1 4-4, the connecting rod 2 4-6 and the connecting rod 3 4-7 are near the dead point, and the force exerted on the wedge block is the largest, that is, the corresponding clamping force on the box beam is the largest.

[0032] The dead point is the connecting point where connecting rod two 4-6 and connecting rod three 4-7 are in the same horizontal plane.

[0033] According to another embodiment of the present invention, it further includes that the connecting rod seat 4-5 is fixed to the connecting rod seat bracket 5 by bolts, and the connecting rod seat bracket 5 is installed on the centering clamping machine base 1 by bolts.

[0034] The connecting rod mechanism is installed on the connecting rod seat bracket 5 through the connecting rod seat 4-5, and finally configured on the centering clamping machine base 1 to complete the installation.

[0035] According to another embodiment of the present invention, it further includes that the tail end of the wedge block 4-9 is an open groove 4-10, and the two ends of the connecting rod three 4-7 are raised bumps 4-12.

[0036] The protrusion 4-12 limits the maximum bending angle of the entire connecting rod mechanism, preventing the wedge block 4-9 from slipping out of the wedge groove 4-8.

[0037] The medium reducer 3-2 and the clamping reducer 4-2 used in this case are worm reducers. The worm reducer mainly consists of a worm wheel, a worm, and a housing. The rotation of the worm drives the rotation of the worm wheel.

[0038] In a worm gear reducer, when the helix angle of the worm is small, such as a single-start worm, when the worm stops rolling, the worm wheel gives the worm a reverse sliding force, which prevents the worm from rolling in the opposite direction. This phenomenon is called worm self-locking. The oblique angle at this time is called the conflict angle, and the tangent of the conflict angle φ is the conflict coefficient f, tanφ= f. Therefore, the smaller the conflict angle, the stronger the self-locking ability. The single-start worm has a small helix angle and a small conflict angle, so it has a strong self-locking ability.

[0039] In the transmission method of the reducer, the worm gear reducer has a feature that other gear transmissions do not have, that is, the worm can easily roll the worm wheel, but the worm wheel cannot roll the worm. This is because the structure and transmission of the worm gear reducer are completed through the friction method. The worm gear transmission method has a self-locking function.

[0040] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. An automatic centering clamping mechanism with self-locking function, comprising a centering clamping machine base (1), characterized in that: A support plate (2) is welded to a centering clamping machine base (1), a centering assembly (3) is provided at the outer end of the support plate (2), clamping assemblies (4) are provided on both sides of the support plate (2), the clamping assembly (4) comprises a clamping motor (4-1), a clamping reducer (4-2) is connected to the clamping motor (4-1), the clamping reducer (4-2) is connected to a worm gear lift (4-3) via a clamping coupling (4-11), a connecting rod 1 (4-4) is provided at the upper end of the worm gear lift (4-3), an opening at the upper end of the connecting rod 1 (4-4) is movably connected to a connecting rod 2 (4-6) and a connecting rod 3 (4-7) via a shaft, a tail end of the connecting rod 2 (4-6) is movably connected to a connecting rod base (4-5) via a shaft, the connecting rod 3 (4-7) is movably connected to a wedge block (4-9) via a shaft, and the wedge block (4-9) is embedded in a wedge groove (4-8).

2. The self-locking automatic centering clamping mechanism according to claim 1 is characterized in that: The centering assembly (3) includes a centering motor (3-1), the centering motor (3-1) is connected to a centering reducer (3-2), the centering reducer (3-2) is connected to a screw rod (3-5) via a centering coupling (3-3), both sides of the screw rod (3-5) are installed in bearings in a centering seat (3-4), the centering seat (3-4) is fixed to a center clamping machine seat (1) via bolts, two sets of T-nuts (3-6) are arranged on the screw rod (3-5), and a top block (3-7) is installed above the T-nut (3-6) via bolts.

3. The self-locking automatic centering clamping mechanism according to claim 1 is characterized in that: The two sides of the support plate (2) are provided with grooves for the movement of the T-nuts (3-6).

4. The self-locking automatic centering clamping mechanism according to claim 1 is characterized in that: The connecting rod seat (4-5) is fixed to the connecting rod seat bracket (5) by bolts, and the connecting rod seat bracket (5) is installed on the centering clamping machine base (1) by bolts.

5. The self-locking automatic centering clamping mechanism according to claim 1 is characterized in that: The tail end of the wedge block (4-9) is an open groove (4-10), and both ends of the connecting rod three (4-7) are raised bumps (4-12).

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