Rotation axis rotation angle limit adjustment mechanism

Abstract

The present invention discloses a rotation angle limit adjustment mechanism for a rotating shaft, comprising a mechanism shaft, a stop block, a stop block, a worm wheel and a worm, two worm wheels are arranged on the mechanism shaft and are in clearance with the mechanism shaft, two worm wheels are placed on one side of the mechanism shaft and respectively mesh with the two worm wheels, two stop blocks are respectively fixedly connected to the two worm wheels and rotate with the worm wheels, the stop block is fixedly connected to the mechanism shaft and placed between the two worm wheels, two staggered stop arms are arranged on the stop block, and the two stop blocks are respectively located on the rotation path of the two stop arms rotating around the axis of the mechanism shaft. The present invention realizes the position fixing of the stop block through the self-locking of the worm wheel and worm, has a wide adjustment range, is flexible to use, two stop blocks are arranged, the positions are independent of each other, can be adjusted and controlled separately, the mechanism operates reliably, and is easy to use.

Description

Technical field:

[0002] The invention relates to a rotation angle limiting and regulating mechanism for a rotation shaft. Background technology:

[0004] When a mechanical reciprocating swing structure based on a rotating shaft as the rotation center is in use, in order to prevent the swinging action from exceeding a limited range during the mechanical execution process, an adjustment mechanism for adjusting the rotation angle of the rotating shaft is often provided in the rotation direction of the rotating shaft.

[0005] The existing adjustment structure generally fixes a limit block on the rotating shaft, and then sets two limit pins on the circumferential path of the limit block rotating along the axis of the rotating shaft. The two limit pins are correspondingly located on the circumferential path of the limit block. When the limit block rotates to the position of the limit pins, it is limited by the limit pins to avoid out-of-range movement during the reciprocating swing of the machine.

[0006] When this structure is in use, the position change of the limit pin is generally that a plurality of limit holes are provided on a preset rotation path (i.e., on the circumferential path of the above-mentioned limit block). When a certain position is required to be limited, the limit pin is threadedly connected to the hole at the corresponding position. This structure has poor flexibility and is inconvenient to adjust. Summary of the invention:

[0008] The present invention provides a rotation angle limiting and adjusting mechanism for a rotating shaft in order to solve the problems existing in the prior art.

[0009] The technical solutions adopted in the present invention are:

[0010] The rotating shaft rotation angle limit adjustment mechanism includes a mechanism shaft, a stop block, a limit block, a worm wheel and a worm. The two worm wheels are inserted into the mechanism shaft and are clearance-matched with the mechanism shaft. The two worm wheels are placed on one side of the mechanism shaft and respectively mesh with the two worm wheels. The two stop blocks are respectively fixedly connected to the two worm wheels and rotate with the worm wheels. The limit block is fixedly connected to the mechanism shaft and placed between the two worm wheels. Two staggered limit arms are provided on the limit block. The two stop blocks are respectively located on the rotation paths of the two limit arms rotating around the axis of the mechanism shaft.

[0011] Furthermore, the limit block includes a limit arm and a sleeve portion, the two limit arms are welded to the outer wall of the sleeve portion and are staggered, and the sleeve portion is fixedly connected to the mechanism shaft by screws.

[0012] Furthermore, the limiting arm includes a connecting portion arranged along the radial direction of the sleeve portion and a limiting portion arranged along the axial direction of the sleeve portion, the connecting portion is welded to the outer wall of the sleeve portion, and the stop block is located on the rotation path of the corresponding limiting portion around the axis of the mechanism shaft.

[0013] Furthermore, the stop block comprises a mounting sleeve and a stop arm, the stop arm is fixed on the outer wall of the mounting sleeve, the mounting sleeve is clearance-matched with the mechanism shaft, and the worm gear is fixed to the mounting sleeve by screws.

[0014] Furthermore, the adjustment mechanism also includes a mounting seat, and the mechanism shaft and the worm are both rotatably connected to the mounting seat via bearings, and the axis of the worm is perpendicular to the axis of the mechanism shaft.

[0015] Furthermore, the mounting sleeve in the stop block is connected to the mounting seat via a copper sleeve, two slots are provided on the outer wall of the mounting sleeve, a clamp is provided in each slot, and the two clamps axially position the mounting sleeve in the copper sleeve.

[0016] Furthermore, the worm is driven by a motor, and an encoder for controlling the rotation angle of the motor shaft is provided on the motor.

[0017] The present invention uses the self-locking principle of worm gears to adjust the rotation angle range of the mechanism shaft. The encoder sets the rotation range, rotates the worm, and the worm gear drives the stop arm to rotate to a specified angle. When the mechanism shaft drives the limit block to rotate, the limit arm on the limit block contacts the stop arm in the stop block, thereby preventing the mechanism shaft from continuing to rotate, thereby achieving rotation angle adjustment. The mechanism shaft can be controlled to adjust the angle of 0°-360° through the stop arms on both sides. The beneficial effects produced by this are: the present invention realizes the position fixing of the stop block through the self-locking of the worm gear, has a wide adjustment range, is flexible to use, and has two stop blocks, which are positioned independently of each other and can be adjusted and controlled separately. The mechanism operates reliably and is easy to use. Description of the drawings:

[0019] Figure 1 and Figure 2 This is a structural diagram of the present invention.

[0020] FIG. 3 is an exploded view of the installation of the mechanism shaft, the stop block, the limit block, the worm wheel and the worm in the present invention.

[0021] FIG. 4 is a diagram showing the installation structure of the mechanism shaft, the stop block, the limit block and the worm gear in the present invention.

[0022] FIG. 5 is a structural diagram of the stop block and the limit block in the present invention. Specific implementation method:

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 5The rotary angle limit adjustment mechanism of the rotary shaft of the present invention comprises a mechanism shaft 11, a stop block 12, a limit block 13, a worm wheel 21 and a worm 22. The two worm wheels 21 are penetrated on the mechanism shaft 11 and are clearance-matched with the mechanism shaft 11. The two worm wheels 22 are placed on one side of the mechanism shaft 11 and respectively mesh with the two worm wheels 21. The two stop blocks 12 are respectively fixedly connected to the two worm wheels 21 and rotate with the worm wheels 21. The limit block 13 is fixedly connected to the mechanism shaft 11 and placed between the two worm wheels 21. Two staggered limit arms 131 are provided on the limit block 13. The two stop blocks 12 are respectively located on the rotation path of the two limit arms 131 rotating around the axis of the mechanism shaft 11.

[0026] The limiting block 13 in the present invention comprises a limiting arm 131 and a sleeve portion 132 . The two limiting arms 131 are welded to the outer wall of the sleeve portion 132 and are staggered. The sleeve portion 132 is fixedly connected to the mechanism shaft 11 by screws.

[0027] The limiting arm 131 includes an integrally formed connecting portion 133 and a limiting portion 134. The connecting portion 133 is welded to the outer wall of the sleeve portion 132 and is arranged along the radial direction of the sleeve portion 132. The limiting portion 134 is arranged at the end of the connecting portion 133 and along the axial direction of the sleeve portion 132. The stop block 12 is located on the rotation path of the corresponding limiting portion 134 rotating around the axis of the mechanism shaft 11.

[0028] The stop block 12 of the present invention comprises a mounting sleeve 121 and a stop arm 122 . The stop arm 122 is fixed on the outer wall of the mounting sleeve 121 . The worm gear 21 is fixed on the mounting sleeve 121 by screws. The mounting sleeve 121 and the mechanism shaft 11 are clearance-matched.

[0029] To facilitate the installation of various structural parts, the present invention also includes a mounting seat 5, the mechanism shaft 11 is rotatably connected to the mounting seat 5 through a bearing, and the worm shaft is rotatably connected to the mounting seat 5. The axis of the worm shaft is perpendicular to the axis of the mechanism shaft 11, and the worm 22 is fixedly connected to the worm shaft.

[0030] During installation, the worm 22 is fixedly connected to the worm shaft with bolts, the worm shaft is installed on the mounting seat 5 with two-disc bearings, the top end of the worm shaft is fixedly connected to the coupling, the coupling is fixedly connected to the encoder, and the worm shaft is driven by the motor 41.

[0031] The mounting sleeve 121 in the stopper 12 is connected to the mounting seat 5 through a copper sleeve 61. Two slots are provided on the outer wall of the mounting sleeve 121. A clamp 62 is provided in each slot. The two clamps axially position the mounting sleeve 121 in the copper sleeve 61. The mounting sleeve 121 is fixedly connected to the worm wheel 21 by screws. When the worm wheel rotates, the stopper 12 is driven to rotate. The worm wheel 21 is meshed with the worm 22. At this time, when the worm is rotated, the worm wheel 21 drives the stopper 12 to rotate together.

[0032] The mechanism shaft 11 is installed on the mounting seat 5 by means of two-disc bearings. The mechanism shaft 11 is fixedly connected to the limit block 13 by means of screws. The mechanism shaft 11 passes through the stop block 12 and does not contact the mounting sleeve 121 .

[0033] The present invention uses the self-locking principle of worm gear to adjust the rotation angle range of the mechanism shaft 11. The encoder sets the rotation range, rotates the worm 22, and the worm gear 21 drives the stop arm 122 to rotate to a specified angle. When the mechanism shaft 11 drives the limit block 13 to rotate, the limit arm 131 on the limit block 13 contacts the stop arm 122 in the stop block 12, thereby preventing the mechanism shaft from continuing to rotate, thereby achieving rotation angle adjustment. The stop arms 122 on both sides can control the mechanism shaft to adjust the angle between 0° and 360°.

[0034] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. The rotation angle limit adjustment mechanism of the rotating shaft is characterized by: The invention comprises a mechanism shaft (11), a stop block (12), a limiting block (13), a worm wheel (21) and a worm (22); the two worm wheels (21) are arranged on the mechanism shaft (11) and are clearance-matched with the mechanism shaft (11); the two worm wheels (22) are arranged on one side of the mechanism shaft (11) and respectively mesh with the two worm wheels (21); the two stop blocks (12) are respectively fixedly connected to the two worm wheels (21) and rotate with the worm wheels (21); the limiting block (13) is fixedly connected to the mechanism shaft (11) and is arranged between the two worm wheels (21); two limiting arms (131) are arranged staggered on the limiting block (13); and the two stop blocks (12) are respectively located on a rotation path of the two limiting arms (131) rotating around the axis of the mechanism shaft (11).

2. The rotation angle limiting adjustment mechanism of the rotating shaft according to claim 1, characterized in that: The limit block (13) comprises a limit arm (131) and a sleeve portion (132); the two limit arms (131) are welded to the outer wall of the sleeve portion (132) and are arranged in a staggered manner; and the sleeve portion (132) is fixedly connected to the mechanism shaft (11) by means of screws.

3. The rotation angle limiting adjustment mechanism of the rotating shaft according to claim 2, characterized in that: The limiting arm (131) comprises a connecting portion (133) arranged along the radial direction of the sleeve portion (132) and a limiting portion (134) arranged along the axial direction of the sleeve portion (132); the connecting portion (133) is welded to the outer wall of the sleeve portion (132); and the stop block (12) is located on a rotation path corresponding to the limiting portion (134) rotating around the axis of the mechanism shaft (11).

4. The rotation angle limiting adjustment mechanism of the rotating shaft according to claim 1, characterized in that: The stop block (12) comprises a mounting sleeve (121) and a stop arm (122); the stop arm (122) is fixed on the outer wall of the mounting sleeve (121); the mounting sleeve (121) and the mechanism shaft (11) are clearance-matched; and the worm gear (21) is fixed to the mounting sleeve (121) by means of screws.

5. The rotation angle limiting and adjusting mechanism of the rotating shaft according to claim 4, characterized in that: The adjustment mechanism also includes a mounting seat (5), the mechanism shaft (11) and the worm (22) are both rotatably connected to the mounting seat (5) via bearings, and the axis of the worm (22) is perpendicular to the axis of the mechanism shaft (11).

6. The rotation angle limiting and adjusting mechanism of the rotating shaft according to claim 5, characterized in that: The mounting sleeve (121) in the stop block (12) is connected to the mounting seat (5) via a copper sleeve (61); two clamping grooves are provided on the outer wall of the mounting sleeve (121); a clamping hoop (62) is clamped in each of the clamping grooves; the two clamping hoop axially positions the mounting sleeve (121) in the copper sleeve (61).

7. The rotation angle limiting and adjusting mechanism of the rotating shaft according to claim 1, characterized in that: The worm (22) is driven by a motor (41), and an encoder for controlling the rotation angle of the motor shaft is provided on the motor (41).

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