Automatic anti-backlash worm wheel dividing mechanism

An indexing mechanism and anti-backlash technology, applied in metal processing mechanical parts, precision positioning equipment, metal processing equipment, etc., can solve the problems that the indexing mechanism is difficult to achieve accuracy, cannot eliminate gaps, etc., to eliminate non-uniqueness, eliminate The effect of radial clearance of worm gear bearing and improving repeatability

Inactive Publication Date: 2009-09-23
邵文远
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is still difficult to achieve an accuracy of more than 10 seconds even with an indexing mechanism made of an expensive high-precision worm gear pair.
[0004] There are many mechanisms for finely adjusting the gap between worm gear and worm, but all of them can only be adjusted to a small size but cannot eliminate the gap

Method used

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  • Automatic anti-backlash worm wheel dividing mechanism
  • Automatic anti-backlash worm wheel dividing mechanism
  • Automatic anti-backlash worm wheel dividing mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 , In this embodiment, a worm wheel 2 and a worm 3 meshing with each other are set in the box 1, and the servo motor 7 is connected to the worm 3 through a coupling 6.

[0029] In this embodiment, the anti-backlash mechanism adopts a hydraulic mechanism, which is composed of a piston 9 with a piston rod, a cylinder body and a cylinder cover 8a, and the axis of the piston 9 is installed perpendicular to the axis of the worm. When the indexing mechanism is rotated and indexed, the cylinder A chamber in the hydraulic mechanism enters oil and chamber B returns oil, the piston 9 retracts, and the pressurized contact 10 breaks away from the contact with the pressure bearing surface 4 of the worm; when positioning is required after rotation, Cavity B of the oil cylinder in the hydraulic mechanism enters pressure oil, chamber A returns oil, the piston 9 is pushed upwards, and the pressurized contact 10 contacts the outer circle of the pressure bearing surface 4 of t...

Embodiment 2

[0033] see figure 2 In this embodiment, a worm wheel 2 and a worm 3 meshing with each other are also provided in the box body 1 , and the servo motor 7 is connected to the worm 3 through a coupling 6 .

[0034] In this embodiment, the anti-backlash mechanism is an oil cylinder or an air cylinder, and the oil cylinder or air cylinder is formed by the piston 9 and the cylinder body 8 . The piston 9 is installed coaxially with the worm 3, and this structural form can simplify the processing technology of the housing;

[0035] In this embodiment, the end face of the pressure contact 10 is an inclined surface, the pressure bearing surface 4 of the worm is a conical surface coaxial with the worm, and the inclined surface on the pressure contact 10 is parallel to the generatrices of the conical surface 4 of the pressure contact 4 of the worm .

[0036] When rotating and indexing, the oil cylinder A chamber of the anti-backlash mechanism enters the oil, and the B chamber returns oi...

Embodiment 3

[0039] see image 3 In this embodiment, a worm wheel 2 and a worm 3 meshing with each other are also provided in the box body 1 , and the servo motor 7 is connected to the worm 3 through a coupling 6 .

[0040] The anti-backlash mechanism in this embodiment is composed of a cylinder and a mechanical booster, and is installed coaxially with the worm. touch.

[0041] image 3As shown, the right end push rod of the piston 9 has a tapered hole 9a, the booster lever 11 is installed in the casing 1 with the lever shaft 13 and the lever support 14, and the effect of the return spring 12 makes the booster lever 11 rod end The pressure contact 10 leaves the pressure bearing surface 4 of the worm. When the air in the chamber A and the air in the chamber B return, the piston 9 moves to the left, so that the booster lever 11 can swing clockwise under the action of the return spring 12, so the pressure contact 10 leaves the pressure bearing surface 4 of the pot rod, at this time There ...

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Abstract

The invention provides an automatic anti-backlash worm wheel dividing mechanism. A worm wheel and a worm mutually meshed are arranged in a case. A servo motor is connected with the worm through a coupling. The mechanism is characterized in that an anti-backlash mechanism is arranged in the case; the movable part of the anti-backlash mechanism has a pressurizing contact capable of extending out to contact a pressure bearing surface of the worm and exerting pressure on the worm; and the direction of pressure is perpendicular to or inclined to the axis of the worm, points at the worm and passes through the central plane of the worm wheel. The dividing mechanism can effectively eliminate the non-uniqueness of the output angle of existing worm wheel dividing mechanisms, greatly increase the non-uniqueness and is beneficial to decreasing the manufacturing difficulty of a precision worm wheel dividing mechanism.

Description

technical field [0001] The invention relates to a precision indexing mechanism, in particular to a mechanical device for realizing precise indexing by means of a worm gear pair to greatly reduce the rotational speed of a high-speed servo motor and greatly increase the torque. Background technique [0002] Existing precision indexing mechanisms include worm gear indexing mechanisms, preloaded double helical gear indexing mechanisms, low-speed high-torque servo motor direct-drive indexing mechanisms, and end tooth plate indexing mechanisms. Compared with the latter two, the worm gear indexing mechanism has the advantages of simple structure, self-locking and ability to withstand the impact of cutting force. Compared with the latter three, the worm gear indexing mechanism has the advantage of being able to index at any angle. The disadvantage of the worm gear indexing mechanism is that the indexing accuracy is low. [0003] The existing worm gear indexing mechanism generally a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q16/02
Inventor 邵文远
Owner 邵文远
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