阅读说明：本技术 一种重载精密虎克铰链 (Heavy-load precise Hooke hinge ) 是由 刘喜平 徐玮珩 肖小刚 潘能微 霍国亮 于 2020-05-20 设计创作，主要内容包括：一种重载精密虎克铰链,包括Y轴,所述Y轴下端套装有Y轴支架,Y轴支架内设有套装在Y轴上的上Y轴轴承和下Y轴轴承,上Y轴轴承的上端设有Y轴轴承盖,下Y轴轴承的下端经Y轴螺母固定,Y轴下端设有固定在Y轴支架底部的Y轴端盖；所述Y轴上端套装有X轴支架,Y轴上端还设有径向穿孔,径向穿孔内安装有X轴,所述径向穿孔内的两端对称安装有左X轴轴承和右X轴轴承,左X轴轴承的一侧设有固定在X轴支架上的左X轴轴承盖,左X轴轴承盖上位于X轴左端固定有X轴端盖；右X轴轴承的一侧设有右X轴轴承盖。本发明中的两个轴系在空间正交并相交布置,且都由一对圆锥滚子轴承配对安装,可承载较大的负载和提供较高的回转精度。(A heavy-duty precision Hooke hinge comprises a Y shaft, wherein a Y-shaft support is sleeved at the lower end of the Y shaft, an upper Y-shaft bearing and a lower Y-shaft bearing which are sleeved on the Y shaft are arranged in the Y-shaft support, a Y-shaft bearing cover is arranged at the upper end of the upper Y-shaft bearing, the lower end of the lower Y-shaft bearing is fixed through a Y-shaft nut, and a Y-shaft end cover fixed at the bottom of the Y-shaft support is arranged at the lower end of the Y shaft; an X-axis support is sleeved at the upper end of the Y axis, a radial through hole is further formed in the upper end of the Y axis, an X axis is installed in the radial through hole, a left X-axis bearing and a right X-axis bearing are symmetrically installed at two ends in the radial through hole, a left X-axis bearing cover fixed on the X-axis support is arranged on one side of the left X-axis bearing, and an X-axis end cover is fixed at the left end of the X axis on the left X-axis bearing cover; and a right X-axis bearing cover is arranged on one side of the right X-axis bearing. The two shafting are arranged in an orthogonal and intersected mode in space, and are installed in a matched mode through the pair of tapered roller bearings, so that the large load can be borne, and high rotation precision can be provided.)

1. A heavy-load precision Hooke hinge comprises a Y shaft (11) and is characterized in that a Y shaft support (12) is sleeved at the lower end of the Y shaft (11), an upper Y shaft bearing (17) and a lower Y shaft bearing (13) which are sleeved on the Y shaft are arranged in the Y shaft support (12), a Y shaft bearing cover (9) is arranged at the upper end of the upper Y shaft bearing (17), the lower end of the lower Y shaft bearing (13) is fixed through a Y shaft nut (14), and a Y shaft end cover (16) fixed at the bottom of the Y shaft support (12) is arranged at the lower end of the Y shaft (11); an X-axis support (4) is sleeved at the upper end of the Y-axis (11), a radial through hole is further formed in the upper end of the Y-axis (11), an X-axis (7) is installed in the radial through hole, a left X-axis bearing (3) and a right X-axis bearing (6) are symmetrically installed at two ends of the radial through hole, a left X-axis bearing cover (2) fixed on the X-axis support (4) is arranged on one side of the left X-axis bearing (3), and an X-axis end cover (1) is fixed on the left X-axis bearing cover (2) and is located at the left end of the X-axis (; one side of the right X-axis bearing (6) is provided with a right X-axis bearing cover (8).

2. The heavy-duty precision Hooke hinge is characterized in that the left X-axis bearing (3) and the right X-axis bearing (6) are two identical precision tapered roller bearings, the two bearings are arranged in a back-to-back mode, the right X-axis bearing cover (8) is located between the right X-axis bearing (6) and the X-axis bearing (7) and is fixed by the right end of the X-axis bearing (7) in a pressing mode, and the pretightening force applied to the inner ring of the bearing is changed by adjusting the thickness of the right X-axis bearing cover (8).

3. The heavy-duty precision Hooke hinge is characterized in that the upper Y-axis bearing (17) and the lower Y-axis bearing (13) are two identical precision tapered roller bearings, the two bearings are arranged in a back-to-back mode, a Y-axis bearing cover (9) is located between the upper Y-axis bearing (17) and the Y-axis bearing (11) and is fixed through extrusion at the upper end of the Y-axis bearing cover (11), and the pre-tightening force applied to the inner ring of the bearing is changed through adjusting the thickness of the Y-axis bearing cover (9).

4. The heavy-duty precision Hooke hinge according to claim 1, wherein X-axis sealing rings (5) are arranged on contact surfaces of the left X-axis bearing cover (2), the right X-axis bearing cover (8) and the inner wall of a radial through hole in a Y-axis (7), and the X-axis sealing rings (5) are fixedly embedded in side grooves of the left X-axis bearing cover (2) and the right X-axis bearing cover (8) and are extruded on the inner wall of the radial through hole.

5. A heavy-duty precision Hooke hinge according to claim 1, wherein a Y-axis sealing ring (10) is arranged on the contact surface of the upper Y-axis bearing cover (9) and the Y-axis support (12), and the Y-axis sealing ring (10) is embedded and fixed in a side groove of the upper Y-axis bearing cover (9) and extruded on the inner wall of the Y-axis support (12).

6. A precision hooke hinge under heavy load according to claim 1, wherein a Y-axis seal (15) is provided between the Y-axis cover (16) and the Y-axis support (12).

Technical Field

The invention relates to a heavy-load precision Hooke hinge.

Background

The parallel mechanism has the advantages of high rigidity, strong bearing capacity, no accumulated error and the like, and has wide application in production and life, such as various motion simulators, stable platforms, parallel machine tools, precise positioning platforms and the like. At present, ball joints are adopted at two ends (or one end) of most parallel mechanism branched chains, the ball joints have the defects of poor bearing capacity and large movement clearance, and compared with the ball joints, the Hooke joint has the advantages of larger rotation angle range, larger bearing capacity and higher rotation precision. Therefore, the Hooke hinge is widely applied to occasions requiring high precision and high load of the motion platform.

Disclosure of Invention

The present invention aims to provide a heavy-duty precision hooke hinge to solve the above problems in the background art.

The technical scheme adopted for achieving the purpose is that the heavy-load precision Hooke hinge comprises a Y shaft, wherein a Y-shaft support is sleeved at the lower end of the Y shaft, an upper Y-shaft bearing and a lower Y-shaft bearing which are sleeved on the Y shaft are further arranged in the Y-shaft support, a Y-shaft bearing cover is arranged at the upper end of the upper Y-shaft bearing, the lower end of the lower Y-shaft bearing is fixed through a Y-shaft nut, and a Y-shaft end cover fixed at the bottom of the Y-shaft support is arranged at the lower end of the Y shaft; an X-axis support is sleeved at the upper end of the Y axis, a radial through hole is further formed in the upper end of the Y axis, an X axis is installed in the radial through hole, a left X-axis bearing and a right X-axis bearing are symmetrically installed at two ends in the radial through hole, a left X-axis bearing cover fixed on the X-axis support is arranged on one side of the left X-axis bearing, and an X-axis end cover is fixed at the left end of the X axis on the left X-axis bearing cover; and a right X-axis bearing cover is arranged on one side of the right X-axis bearing.

In the invention, the left X-axis bearing and the right X-axis bearing are two identical precise tapered roller bearings, the two bearings are arranged back to back, the right X-axis bearing cover is positioned between the right X-axis bearing and the X-axis and is extruded and fixed by the right end of the X-axis, and the pretightening force applied to the inner ring of the X-axis bearing is changed by adjusting the thickness of the right X-axis bearing cover.

In the invention, the upper Y-axis bearing and the lower Y-axis bearing are two identical precise tapered roller bearings, the two bearings are arranged back to back, the Y-axis bearing cover is positioned between the upper Y-axis bearing and the Y-axis and is extruded and fixed by the upper end of the Y-axis, and the pretightening force applied to the inner ring of the bearing is changed by adjusting the thickness of the Y-axis bearing cover.

In the invention, X-axis sealing rings are respectively arranged on the contact surfaces of the left X-axis bearing cover and the right X-axis bearing cover with the inner wall of the radial through hole on the Y axis, and are respectively embedded and fixed in the side grooves of the left X-axis bearing cover and the right X-axis bearing cover and extruded on the inner wall of the radial through hole.

According to the invention, a Y-axis sealing ring is arranged on the contact surface of the upper Y-axis bearing cover and the Y-axis support, and the Y-axis sealing ring is embedded and fixed in a side groove of the upper Y-axis bearing cover and extruded on the inner wall of the Y-axis support.

In the invention, a Y-axis sealing gasket is arranged between the Y-axis end cover and the Y-axis support.

Advantageous effects

Compared with the prior art, the invention has the following advantages.

1. Compared with a ball hinge, the Hooke hinge has a large movement range and strong bearing capacity;

2. compared with a sliding bearing and a spherical roller bearing, the invention adopts the precise tapered roller bearing, so that the bearing capacity is higher and the shafting precision is higher.

Drawings

FIG. 1 is a schematic view of a partial cross-sectional structure of the present invention;

FIG. 2 is a schematic view of the present invention with the X-axis rotated 0 degrees and the Y-axis rotated 0 degrees;

FIG. 3 is a schematic view of the present invention with the X-axis rotated 45 degrees and the Y-axis rotated 45 degrees;

fig. 4 is a schematic view of the structure of the present invention combined with an electric cylinder;

shown in the figure: the bearing comprises an X-axis end cover, a 2-left X-axis bearing cover, a 3-left X-axis bearing, a 4-X-axis support, a 5-X-axis sealing ring, a 6-right X-axis bearing, a 7-X-axis bearing, a 8-right X-axis bearing cover, a 9-Y-axis bearing cover, a 10-Y-axis sealing ring, a 11-Y-axis bearing, a 12-Y-axis support, a 13-lower Y-axis bearing, a 14-Y-axis nut, a 15-Y-axis sealing gasket, a 16-Y-axis end cover and a 17-upper Y-axis bearing.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

A heavy-duty precision Hooke hinge comprises a Y shaft 11, as shown in figures 1-4, a Y shaft support 12 is sleeved at the lower end of the Y shaft 11, an upper Y shaft bearing 17 and a lower Y shaft bearing 13 which are sleeved on the Y shaft are arranged in the Y shaft support 12, a Y shaft bearing cover 9 is arranged at the upper end of the upper Y shaft bearing 17, the lower end of the lower Y shaft bearing 13 is fixed through a Y shaft nut 14, and a Y shaft end cover 16 fixed at the bottom of the Y shaft support 12 is arranged at the lower end of the Y shaft 11; an X-axis support 4 is sleeved at the upper end of the Y-axis 11, a radial through hole is further formed in the upper end of the Y-axis 11, an X-axis 7 is installed in the radial through hole, a left X-axis bearing 3 and a right X-axis bearing 6 are symmetrically installed at two ends in the radial through hole, a left X-axis bearing cover 2 fixed on the X-axis support 4 is arranged on one side of the left X-axis bearing 3, and an X-axis end cover 1 is fixed on the left X-axis bearing cover 2 and is located at the left end of the X-axis 7; and a right X-axis bearing cover 8 is arranged on one side of the right X-axis bearing 6.

The left X-axis bearing 3 and the right X-axis bearing 6 are two identical precise tapered roller bearings, the two bearings are arranged back to back, the right X-axis bearing cover 8 is positioned between the right X-axis bearing 6 and the X-axis bearing 7 and is extruded and fixed by the right end of the X-axis bearing 7, and the pretightening force applied to the inner ring of the bearing is changed by adjusting the thickness of the right X-axis bearing cover 8.

The upper Y-axis bearing 17 and the lower Y-axis bearing 13 are two identical precise tapered roller bearings which are arranged back to back, the Y-axis bearing cap 9 is positioned between the upper Y-axis bearing 17 and the Y-axis bearing 11 and is extruded and fixed by the upper end of the Y-axis bearing 11, and the pretightening force applied to the bearing inner ring is changed by adjusting the thickness of the Y-axis bearing cap 9.

All be equipped with X axle sealing washer 5 on the contact surface of radial perforation inner wall on left side X axle bearing cap 2 and right X axle bearing cap 8 and the Y axle 7, X axle sealing washer 5 is all inlayed and is fixed in the side recess of left X axle bearing cap 2 and right X axle bearing cap 8 to the extrusion is on radial perforation inner wall.

And a Y-axis sealing ring 10 is arranged on the contact surface of the upper Y-axis bearing cover 9 and the Y-axis support 12, and the Y-axis sealing ring 10 is embedded and fixed in a groove on the side surface of the upper Y-axis bearing cover 9 and extruded on the inner wall of the Y-axis support 12.

And a Y-axis sealing gasket 15 is arranged between the Y-axis end cover 16 and the Y-axis support 12.

The invention takes a Y-axis support 12 as a fixed base, an upper Y-axis bearing 17 and a lower Y-axis bearing 13 are arranged in the Y-axis support and are matched with a Y-axis 11 to form a Y-axis system, an inner ring of the upper Y-axis bearing 13 is pressed by a Y-axis bearing cover 9, and an inner ring of the lower Y-axis bearing 13 is pressed by two Y-axis nuts 14 at the lower end of the Y-axis 11; a left X-axis bearing 3 and a right X-axis bearing 6 are arranged in a radial through hole of a Y-axis 11 and matched with an X-axis 7 to form an X-axis system, a left X-axis bearing cover 2 and a right X-axis bearing cover 8 are respectively pressed on inner rings of the left X-axis bearing 3 and the right X-axis bearing 6, and an X-axis support 4 is fixed on the left X-axis bearing cover 2 and the right end face 7 of the X-axis; the X-axis system and the Y-axis system are two orthogonal rotating pairs and are arranged in series, the Y-axis 11 rotates to drive the whole X-axis system to rotate around the Y-axis, the X-axis 7 rotates to drive the X-axis support 4 to rotate, and the driving device electric cylinder (or hydraulic cylinder) is fixed on the X-axis support 4.

The X-axis is orthogonally constructed on the Y-axis, so that the function of a Hooke hinge is realized; the Y-axis support is used as a fixed base, two precision tapered roller bearings which are arranged back to back are arranged in an inner hole, the pre-tightening amount of a Y-axis is adjusted by adjusting the thickness of a Y-axis bearing cover 9 and pressing a bearing inner ring by using a Y-axis nut 14, and the precision of the Y-axis is improved; the Y-axis 11 is used as a base, two precision tapered roller bearings which are arranged back to back are arranged in the radial through hole, the left X-axis bearing cover 2 is pressed against the inner ring of the bearing by using a screw through adjusting the thickness of the right X-axis bearing cover 8, the pre-tightening amount of the X-axis is adjusted, and the precision of the X-axis is improved; and Y-axis 11 is the main shaft of Y-axis and the supporting seat of X-axis, and X-axis 7 and Y-axis 11 are orthogonally distributed.

According to the invention, the Y-axis support 12 is used as a fixed base, the X-axis support 4 is used as a movable base, the X-axis support 4 can rotate around an X-axis and rotate around a Y-axis, the two axes are orthogonal in space and are arranged in an intersecting manner, and the two axes are installed in a matched manner by a pair of tapered roller bearings, so that the large load can be borne and the high rotation precision can be provided; the Y-axis 11 rotates to be a Y-axis, a bearing is embedded in a radial through hole in the upper portion of the Y-axis 11 and matched with the X-axis 7, the X-axis support 4 is fixed on the X-axis 7 and the left X-axis bearing cover 1, and the X-axis support 4 rotates to be an X-axis.

In the specific implementation of the invention, as shown in fig. 2, the X axis and the Y axis of the hooke hinge are both in the state of 0 degree, the movement range of the X axis is 0 degree to 90 degrees, and the movement range of the Y axis is 0 degree to 360 degrees; as shown in fig. 3, when the hooke hinge is in a state where both the X axis and the Y axis are 45 degrees, the hooke hinge is actually applied to the parallel mechanism, the range of the X axis is 70 degrees to 90 degrees, and the range of the Y axis is-15 degrees to +15 degrees. Because the X-axis and the Y-axis adopt the precise tapered roller bearings, the bearing capacity of the Hooke hinge can be greatly improved on the premise of ensuring the precision of the axes.

Fig. 4 shows an application example of the present invention, which is a branched chain consisting of a lower hooke hinge, a motorized cylinder, and an upper hooke hinge, and the branched chain has a UCU configuration, i.e., the lower hinge is a hooke hinge.

According to the invention, a Y-axis support 11 is used as a fixed base, an X-axis support 4 is used as a movable base, and an electric cylinder is fixed above the X-axis support 4 to form a branched chain in a parallel mechanism; the X-axis support 4 can rotate around an X-axis and a Y-axis, the two axes are orthogonal in space and are arranged in an intersecting mode, and the two axes are installed in a matched mode through a pair of tapered roller bearings, so that the large load can be borne, and high rotation precision can be provided.