A lifting mechanism for a speed reducer

Abstract

The present invention relates to a lifting mechanism for a speed reducer box, which comprises a bottom plate, a driving mechanism, a clamping mechanism and an auxiliary support frame. The clamping mechanism has a speed reducer box connecting seat and a plurality of support rods for supporting and connecting the speed reducer box connecting seat. The support rods are vertically movably arranged on the bottom plate and are arranged in a straight line. A plurality of nut sleeves are rotatably arranged on the bottom plate. The nut sleeves are respectively threadedly connected with the support rods, and worm wheels are arranged on the outer walls of the nut sleeves. A worm is also arranged on the bottom plate and is connected with each worm wheel. When the worm rotates, it drives the nut sleeves to rotate, and then drives the support rods to move vertically synchronously, so as to adjust the vertical movement of the speed reducer box connecting seat. The auxiliary support frame is horizontally reciprocatingly movably connected to the lower side surface of the bottom plate. The present invention provides a lifting mechanism with adjustable height so that the speed reducer box can be at different heights to meet the needs of connecting the speed reducer box with external mechanisms at different heights.

Description

Technical Field

[0001] The present invention relates to the technical field of torque measurement devices, and particularly to a lifting mechanism for clamping a speed reducer box. Background Art

[0002] When measuring the output torque of a speed reducer box, due to the difference in height of the measuring mechanism connected to the speed reducer box, it is necessary to adjust the height of the speed reducer box so that it is on the same axis as the connecting mechanism. Currently, most speed reducer boxes cannot adjust their own height, so it is necessary to design a supporting speed reducer box lifting mechanism as a device for adjusting the height of the speed reducer box. Summary of the Invention

[0003] In view of the problem of adjusting the height of the speed reducer box, the present invention provides a speed reducer box lifting mechanism. This lifting mechanism can realize the free lifting and lowering of the speed reducer box in height, and at the same time, this mechanism can ensure the stability of the overall mechanism when the speed reducer box is working. The specific implementation is as follows:

[0004] A lifting mechanism for a speed reducer box includes a bottom plate, a driving mechanism, a clamping mechanism, and an auxiliary support frame. The clamping mechanism has a speed reducer box connecting seat and several support rods that support and connect the speed reducer box connecting seat. The support rods are vertically movably arranged on the bottom plate and are arranged in a straight line. Several nut sleeves are rotatably arranged on the bottom plate. The nut sleeves are respectively threadedly connected to the respective support rods, and a worm gear is arranged on the outer wall of the nut sleeve. A worm is also arranged on the bottom plate and is connected to each worm gear. When the worm rotates, it drives the nut sleeve to rotate, and then drives the respective support rods to move vertically synchronously, thereby adjusting the vertical movement of the speed reducer box connecting seat. The auxiliary support frame is horizontally reciprocally movably connected to the lower side of the bottom plate. The bottom plate is provided with adjustment holes corresponding to the support rods, and the lower ends of the respective support rods gradually increase so that when the support rods move downward, they can extend out of the adjustment holes by different lengths. The auxiliary support frame is provided with limit slot holes corresponding to the respective support rods. When the support rods move upward to lift the speed reducer box connecting seat, the corresponding support rods disengage from the limit slot holes, and the ends of the remaining support rods still remain in the corresponding limit slot holes and move relative to the limit slot holes.

[0005] In the further design of the lifting mechanism for a speed reducer box, a driving frame is arranged on one side of the bottom plate. A handwheel is rotatably arranged on the driving frame. The handwheel is connected to a driving sprocket. A driven sprocket is arranged at the corresponding end of the worm and the driving frame. The driving sprocket is connected to the driven sprocket through a chain.

[0006] The described lifting mechanism for a speed reducer is further designed such that the auxiliary support frame is elastically connected to the bottom side of the bottom plate via a spring. When the auxiliary support frame is received on the bottom side of the bottom plate, the spring is in a compressed energy storage state and is connected to the bottom plate via a locking pin. When the locking pin is removed, the auxiliary support frame moves outward from the bottom plate under the action of the elastic force, and the moving stroke is limited by the lower ends of the support rods.

[0007] The described lifting mechanism for a speed reducer is further designed such that rollers are provided at the ends of the auxiliary support frame.

[0008] The described lifting mechanism for a speed reducer is further designed such that a bracket fixedly connected to the bottom plate is provided on one side of the clamping mechanism.

[0009] The beneficial effects of the present invention are as follows:

[0010] The present invention provides a lifting mechanism whose height can be adjusted so that the speed reducer is at different heights to meet the needs of connecting the speed reducer to external mechanisms at different heights. By providing an auxiliary support frame, the torque generated during the operation of the speed reducer is prevented from causing the overall structure to tip over, enhancing the structural stability. In particular, the extended length of the auxiliary support frame is restricted by the rising height of the support rods. Without adding additional control components, the auxiliary support frame can be extended as short as possible while meeting the balance requirements. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the overall structure of the embodiment.

[0012] Figure 2 It is a schematic diagram of the front structure of the embodiment.

[0013] Figure 3 It is a schematic diagram of the back structure of the embodiment.

[0014] Figure 4 It is a schematic diagram of the structural principle of the auxiliary support frame. Detailed Embodiments

[0015] The present invention will be further described below in conjunction with the drawings of the specification and the embodiments:

[0016] A lifting mechanism for a speed reducer as shown in the figure, including a bottom plate 4, a driving mechanism 1, a clamping mechanism 2 and an auxiliary support frame 3. The clamping mechanism 2 has a speed reducer connecting seat 22 and several support rods 21 that support and connect the speed reducer connecting seat. The speed reducer connecting seat 22 is fixedly installed with a speed reducer by bolts. The support rods 21 are vertically movably arranged on the bottom plate and are arranged in a straight line. The lower part of the support rod has a thread. Several nut sleeves 11 are rotatably arranged on the bottom plate 4. The nut sleeves are respectively threadedly connected to the support rods. And the outer wall of the nut sleeve 11 is provided with a worm gear 12. And a worm 13 connected to each worm gear is also arranged on the bottom plate. When the worm rotates, it drives the nut sleeve to rotate and then drives the support rods to move vertically synchronously, so as to adjust the vertical movement of the speed reducer connecting seat. After driving the speed reducer installed on the speed reducer connecting seat to move vertically to a suitable height, the output shaft of the speed reducer is connected to an external torque measuring structure.

[0017] The auxiliary support frame 3 is horizontally reciprocally movably connected to the lower side of the bottom plate. The bottom plate 3 is provided with adjustment holes corresponding to the support rods. And the lower ends of the support rods gradually increase so that when the support rods move downward, they can extend out of the adjustment holes by different lengths. The auxiliary support frame 3 is provided with limit slot holes 31 corresponding to the support rods. The lengths of the limit slot holes are different. When the support rods move upward to lift the speed reducer connecting seat, the corresponding support rod (i.e., Figure 4 the leftmost first support rod in the figure) disengages from the limit slot hole 31, and the ends of the remaining support rods ( Figure 4 the two right support rods in the figure) still remain in the corresponding limit slot holes and move relative to the limit slot holes. So that the auxiliary support frame realizes different extension lengths according to the different rising heights of the speed reducer connecting seat. On the one hand, it ensures that the torque generated during the operation of the speed reducer will not cause tipping. On the other hand, it makes the extension length of the auxiliary support frame shorter under the condition of meeting the stability requirements, so as to prevent the auxiliary support frame from being greatly deformed when the torque acts on the longer auxiliary support frame. Figure 4The lengths of the two right support rods in [description] are the same, so the extension length of the auxiliary support frame in this embodiment can be set in two levels. Obviously, the lengths of the lower ends of these two support rods can be different. Specifically, the length of the second support rod from left to right in the figure is greater than that of the first support rod, and the length of the third support rod is greater than that of the first support rod, that is, the lengths of the support rods gradually increase. And the depths and longitudinal lengths of the limiting slot holes corresponding to each support rod also gradually increase in turn. That is, when the support rod moves upward, when the first support rod disengages from its corresponding limiting slot hole, the limiting constraint of this support rod on the auxiliary support frame is cancelled. At this time, although the second support rod moves upward a certain height, it is still in its corresponding limiting slot hole, and the second support rod slides in its corresponding limiting slot hole; if the support rod no longer rises, the second support rod abuts against the inner end wall of the corresponding limiting slot hole, and the auxiliary support frame no longer extends outward; assuming that the support rod continues to rise, when the second support rod also disengages from the corresponding limiting slot hole, the third support rod is still in its corresponding limiting slot hole, and the auxiliary support frame extends outward until the third support rod abuts against the inner end wall of the corresponding limiting slot hole.

[0018] The auxiliary support frame 3 is elastically connected to the bottom side of the bottom plate via a spring 6. When the auxiliary support frame is received on the bottom side of the bottom plate, the spring is in a compressed energy storage state and is connected to the bottom plate via a locking pin; when the locking pin is removed, the auxiliary support frame moves outward from the bottom plate under the action of the elastic force, and the moving stroke is limited by the lower ends of the support rods. During the extension process of the auxiliary support frame 3, whenever a part of the limiting constraint of the support rod on it is cancelled, the auxiliary support frame 3 extends out a corresponding length under the action of the elastic force. When being received, the auxiliary support frame is compressed to overcome the elastic force of the spring and is received under the bottom plate, and the relative position relationship between the auxiliary support frame and the bottom plate is fixed with a locking pin. Figure 4 In [description], for the convenience of illustration, the spring 6 is drawn at the rear end of the auxiliary support frame. In fact, it can be arranged in the middle of the auxiliary support frame and is elastically connected to the bottom side of the bottom plate through the middle of the auxiliary support frame. Of course, if a spring is not used, a pneumatic or hydraulic telescopic rod can also be used to drive the movement of the auxiliary support frame. At this time, the stroke of the telescopic rod is also restricted by the upward height of the support rod.

[0019] A drive frame 42 is provided on one side of the bottom plate 4. A handwheel 43 is rotatably provided on the drive frame. The handwheel is connected to a driving sprocket 44. A driven sprocket 45 is provided at the corresponding end of the worm and the drive frame. The driving sprocket is connected to the driven sprocket through a chain. Rotating the handwheel, the sprocket-chain transmission mechanism drives the worm to rotate, and then drives the whole support rod to rise or fall, driving the reduction box connecting seat to rise or fall.

[0020] On one side of the clamping mechanism, there is a bracket 5 fixedly connected to the bottom plate. The bracket 5 is used to support the output shaft of the speed reducer. Especially when the output shaft of the speed reducer is not connected to other mechanisms, the bracket is used to maintain the balance of the speed reducer.

Claims

1. A lifting mechanism for a speed reducer, characterized in that, The invention comprises a base plate, a driving mechanism, a clamping mechanism and an auxiliary support frame, wherein the clamping mechanism comprises a reduction gear box connecting seat and a plurality of support rods supporting and connecting the reduction gear box connecting seat, the support rods are vertically movably arranged on the base plate and are arranged in a straight line, a plurality of nut sleeves are rotatably arranged on the base plate, the nut sleeves are respectively threadedly connected to the support rods, and a worm gear is arranged on the outer wall of the nut sleeve, and a worm connected to the worm gear is also arranged on the base plate; when the worm gear rotates, the nut sleeve is driven to rotate and then drive the support rods to move vertically synchronously, thereby adjusting the vertical movement of the reduction gear box connecting seat; the auxiliary support frame is horizontally reciprocatingly connected to the lower side surface of the base plate, the base plate is provided with adjustment holes corresponding to the support rods, and the lower ends of the support rods are gradually increased so that different lengths of the adjustment holes can be extended when the support rods move downward; the auxiliary support frame is A limiting slot hole is arranged opposite to each support rod, and when the support rod moves upward to lift the reduction box connecting seat, the corresponding support rod disengages from the limiting slot hole, and the ends of the remaining support rods are still located in the corresponding limiting slot holes and move relative to the limiting slot holes; a driving frame is rotatably arranged on the driving frame, and the handwheel is connected to the active sprocket, and the ends corresponding to the worm and the driving frame are provided with a passive sprocket, and the active sprocket is connected to the passive sprocket through a chain; the auxiliary support frame is elastically connected to the bottom side surface of the base plate via a spring, and when the auxiliary support frame is stored in the bottom side surface of the base plate, the spring is in a compressed energy storage state and is connected to the base plate via a locking pin; when the locking pin is pulled out, the auxiliary support frame moves toward the outside of the base plate under the action of elastic force and the moving stroke is limited by the lower ends of each support rod; one side of the clamping mechanism has a bracket fixedly connected to the base plate.

2. The lifting mechanism for a speed reducer according to claim 1, characterized in that, The end of the auxiliary support frame is provided with a roller.

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