CN211855839U

CN211855839U - Speed reducer bending moment performance detection device

Info

Publication number: CN211855839U
Application number: CN202020396386.3U
Authority: CN
Inventors: 韩金文; 马建华; 李晓峰; 张立华
Original assignee: Shaanxi Changkong Gear Co ltd
Current assignee: Shaanxi Changkong Gear Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-11-03
Anticipated expiration: 2030-03-25

Abstract

A speed reducer bending moment performance detection device is characterized in that a speed reducer is horizontally fixed on a bottom plate of a steel frame, and a radial loading mechanism is vertically fixed on a top plate of the steel frame; the radial loading mechanism comprises a lead screw assembly, a tension sensor and a radial loading adaptor; the screw rod assembly is vertically fixed on a top plate of the steel frame, and the displacement end of the screw rod assembly is downward vertical to an output shaft of the speed reducer; the bearing seat of the radial loading adapter is sleeved on the outer wall of the adapter through a bearing, and the inner wall of the adapter is sleeved on the output shaft of the reducer and synchronously rotates with the output shaft; the upper stress end and the lower stress end of the tension sensor are respectively connected with the screw rod assembly and the bearing seat; the tension sensor is connected with the display controller through a lead. The radial loading of the adapter makes it possible to obtain a radially stressed component of the output shaft of the gear unit. The lead screw assembly provides a radial pull force to the output shaft of the reducer. Meanwhile, under the matching of the tension sensor, the purpose of detecting the bending moment under the working state of the speed reducer is realized.

Description

Speed reducer bending moment performance detection device

Technical Field

The utility model belongs to the technical field of the reduction gear performance detects, concretely relates to reduction gear bending moment performance detection device.

Background

When most reducers work, an output shaft of the reducer needs to bear certain bending moment while bearing torque, and for example, in the fields of automobiles, industrial robots, rail transit, steering engines and the like, the bending moment performance becomes one of important indexes for measuring the bearing capacity of the reducer. However, since the bending moment detection requires that a radial tension be applied to the output shaft of the speed reducer in an operating state in which the output shaft of the speed reducer is rotating, it is currently more difficult to detect the bending moment performance of the speed reducer than the torque detection of the speed reducer.

Disclosure of Invention

In view of this, the utility model provides a reduction gear moment of flexure performance detection device can implement the detection to the moment of flexure performance of reduction gear under reduction gear operating condition.

The utility model adopts the technical proposal that: the utility model provides a reduction gear moment of flexure performance detection device, is including the steelframe that is used for fixed reduction gear and the display controller who is used for showing the testing result, its characterized in that: the speed reducer is horizontally fixed on a bottom plate of the steel frame, and a radial loading mechanism is vertically fixed on a top plate of the steel frame; the radial loading mechanism comprises a lead screw assembly, a tension sensor and a radial loading adaptor; the screw rod assembly is vertically fixed on a top plate of the steel frame, and the displacement end of the screw rod assembly is downward vertical to an output shaft of the speed reducer; the radial loading adaptor comprises an adaptor seat, a bearing and a bearing seat, the bearing seat is sleeved on the outer wall of the adaptor seat through the bearing, and the inner wall of the adaptor seat is sleeved on the output shaft of the speed reducer and rotates synchronously with the output shaft; the upper stress end and the lower stress end of the tension sensor are respectively connected with the displacement end of the upper lead screw assembly and the lower bearing seat through connecting pieces; the tension sensor is connected with the display controller through a lead.

Further, the screw assembly comprises a transmission screw, a positioning sleeve, a screw nut, a guide rail sleeve, a limiting nut and a loading handle; the loading handle is vertically fixed at the upper end of the transmission screw rod; the transmission screw comprises a section of shaft rod and a section of threaded rod; the positioning sleeve is sleeved on the shaft rod through an end face bearing, and the lower end of the positioning sleeve is fixed on the upper surface of the top plate; the transmission screw vertically penetrates through the steel frame top plate, a gap is formed between the shaft lever and the penetrating top plate and the shaft lever is matched with the penetrating top plate and rotates on the top plate, the threaded rod extends out of the lower surface of the steel frame top plate and is screwed with a screw nut, a guide rail sleeve is sleeved outside the screw nut, the upper end of the guide rail sleeve is fixed on the lower surface of the top plate, and the lower end of the screw nut extends out of the lower end of the guide rail sleeve; the upper end surface of the screw nut is provided with two horizontal and symmetrical ear parts, the cylinder wall of the guide rail sleeve is provided with two guide rail grooves parallel to the axis of the guide rail sleeve, the positions of the guide rail grooves correspond to the positions of the two ear parts, and the two ear parts are respectively inserted into the corresponding guide rail grooves; the lower end of the screw nut is provided with a connecting port which is used for being connected with the tension sensor.

Furthermore, a limiting part is arranged at the position, close to the lower end of the guide rail groove, of the guide rail sleeve.

Furthermore, the limiting part is a limiting nut, the outer wall of the guide rail sleeve is provided with an external thread, and the limiting nut needs to be installed on the outer wall of the guide rail sleeve.

Further, the lead angle of the transmission screw is less than 4 degrees and less than 30 degrees.

Furthermore, the lead screw assembly is connected with the tension sensor through a tension spring, and the tension sensor is connected with the bearing seat through a steel wire rope.

The utility model has the advantages that: due to the radial loading adapter, the output shaft of the speed reducer obtains a part capable of bearing force radially. The lead screw assembly is arranged to provide radial tension to the output shaft of the reducer. Under the cooperation of the screw rod assembly, the tension sensor and the radial loading adaptor, the purpose of detecting the bending moment in the working state of the speed reducer is realized.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of a radial load adaptor configuration.

Fig. 3 is a sectional view a-a of fig. 2.

Fig. 4 is a schematic structural view of the lead screw assembly.

Fig. 5 is a schematic view of the lead screw nut.

Fig. 6 is a schematic view of fig. 5 in the direction B.

Fig. 7 is a longitudinal sectional view of the guide rail sleeve.

Fig. 8 is a schematic view of fig. 7 in direction C.

In the figure: 1. the device comprises a steel frame, 1-1 parts, a top plate, 1-2 parts, reinforcing rib plates, 1-3 parts, a bottom plate, 1-4 parts, side plates, 2 parts, a speed reducer, 3 parts, a motor, 4 parts, a display controller, 5 parts, a switching fixing frame, 6 parts, a radial loading switching part, 6-1 parts, a retainer ring, 6-2 parts, a switching seat, 6-3 parts, a bearing, 6-4 parts, a bearing seat, 6-5 parts, a connecting hole, 7 parts, a steel wire rope, 8 parts, a tension sensor, 9 parts, a lead screw component, 9-1 parts, a transmission lead screw, 9-2 parts, a positioning sleeve, 9-3 parts, a guide rail sleeve, 9-4 parts, a guide rail groove, 9-5 parts, a lead screw nut, 9-6 parts, an ear part, 9-7 parts, 9-8 parts, a limiting nut, 9-11 parts of a loading handle, 10 parts of a tension spring.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses a focus is in how under reduction gear normal operating condition, implements radial loading to its output shaft to carry out the moment of flexure and detect. The key to achieving this goal is to provide a radial loading mechanism for the output shaft of the reducer.

As shown in fig. 1, the device for detecting the bending moment performance of the speed reducer comprises a radial loading mechanism fixedly suspended on a steel frame 1, and a switching fixing frame 5 for fixing the speed reducer 2 to be detected. The steel frame 1 comprises a top plate 1-1, a bottom plate 1-3 and side plates 1-4 for supporting the top plate 1-1 and the bottom plate 1-3. The radial loading mechanism is fixedly suspended on the top plate 1-1. The switching fixing frame 5 is fixed on the bottom plates 1-3. Because the utility model discloses a detection range can reach 0~10000 N.m, in order to increase the intensity of steelframe 1, the thickness of multiplicable steelframe on the one hand, on the other hand can be at roof 1-1 and curb plate 1-4 of steelframe 1, and bottom plate 1-3 and curb plate 1-4's vertical connection position fixed reinforced rib plate 1-2. In order to improve the safety of the working environment, the utility model discloses a transparent protective baffle of round is add to the periphery.

The utility model discloses a radial loading mechanism of core design includes lead screw assembly 9, force sensor 8 and radial loading adaptor 6.

As shown in fig. 1, the screw assembly 9 is vertically fixed on the top plate 1-1 of the steel frame 1. The radial loading adaptor 6 is sleeved on the output shaft of the speed reducer 2. Two stress ends of the tension sensor 8 are respectively connected with the screw assembly 9 and the radial loading adaptor 6. The tension sensor 8 is also connected with the display controller 4 through a wire. The radial load adaptor 6 is used to provide a stressed member for the output shaft of the reducer 2 that can be loaded radially. The lead screw assembly 9 is used to provide a radially loaded pulling force to the output shaft of the reducer 2. The tension sensor 8 is positioned between the lead screw assembly 9 and the radial loading adaptor 6, and is used for obtaining the tension loaded in the radial direction, converting the tension into a signal and transmitting the signal to the display controller 4 through a wire. And finally, the display controller 4 displays the detection result to the operator.

As shown in fig. 2 and 3, the radial load adapter 6 includes an adapter 6-2, a bearing 6-3, and a bearing seat 6-4.

The adapter 6-2 is of a sleeve structure, and a key groove is formed in the inner wall of the adapter 6-2 and matched with a flat key on an output shaft of the speed reducer 2. The adapter 6-2 is sleeved on the output shaft, the inner wall of the adapter 6-2 is in clearance fit with the output shaft, and a flat key on the output shaft is embedded in a key groove. When the output shaft rotates, the adapter 6-2 and the output shaft can keep synchronous rotation.

The bearing seat 6-4 is sleeved on the outer wall of the adapter seat 6-2 through a bearing 6-3. The bearing seat 6-4 is provided with a connecting hole 6-5 for connecting with a tension sensor 8. The bearing seat 6-4 and the tension sensor 8 can be connected through a steel wire rope 7. In order to prevent the bearing 6-3 from generating axial displacement on the bearing seat 6-4 and the adapter 6-2, the inner wall of the bearing seat 6-4 and the outer wall of the adapter 6-2 are respectively provided with a retainer ring 6-1, and the bearing 6-3 is limited between the two retainer rings 6-1.

As shown in FIG. 4, the screw assembly 9 comprises a transmission screw 9-1, a positioning sleeve 9-2, a screw nut 9-5, a guide rail sleeve 9-3, a limit nut 9-8 and a loading handle 9-11. The drive screw 9-1 includes a length of shaft and a length of threaded rod. The outside of the shaft lever is sleeved with a positioning sleeve 9-2, and an end face bearing 9-10 is arranged between the positioning sleeve 9-2 and the shaft lever. The lower end of the positioning sleeve 9-2 is fixed on the upper surface of the top plate 1-1 through a fastening screw 9-9. The transmission screw 9-1 vertically penetrates through a top plate 1-1 of the steel frame 1, a shaft lever is in clearance fit with the penetrating top plate 1-1, and the threaded rod extends out of the lower surface of the top plate 1-1 of the steel frame 1. The drive screw 9-1 is rotatable but not axially displaceable under the influence of the positioning sleeve 9-2.

A screw rod of the transmission screw rod 9-1 is provided with a screw rod nut 9-5 in a screwed mode. As shown in FIG. 6, the threaded hole of the lead screw nut 9-5 is a blind hole. The upper end surface of the screw nut 9-5 is provided with two horizontal and symmetrical ear parts 9-6. As shown in FIG. 5, a connection port 9-7 is provided at the lower end of the lead screw nut 9-5, and the connection port 9-7 is used for connecting with the tension sensor 8. The lead screw nut 9-5 and the tension sensor 8 can be connected through a tension spring 10. The guide rail sleeve 9-3 is sleeved outside the screw nut 9-5. The upper end of the guide rail sleeve 9-3 is fixed on the lower surface of the top plate 1-1 through a fastening screw 9-9. A connecting port 9-7 of the lead screw nut 9-5 extends out from the lower end of the guide rail sleeve 9-3.

As shown in fig. 7 and 8, the wall of the guide rail sleeve 9-3 is provided with two guide rail grooves 9-4 parallel to the axis of the guide rail sleeve 9-3. The position of the guide rail groove 9-4 corresponds to the position of the two lug parts 9-6 of the screw nut 9-5. The two ear parts 9-6 of the spindle nut 9-5 are inserted into the corresponding guide rail groove 9-4 and project from the guide rail groove 9-4 by a small distance. When the drive screw 9-1 rotates, the screw nut 9-5 can move upwards along the guide rail groove 9-4 through the two lug parts 9-6.

In order to ensure that the screw nut 9-5 does not slip out of the guide groove 9-4 during movement, a limiting part can be arranged at the position of the guide sleeve 9-3 close to the lower end of the guide groove 9-4, so as to limit the lowest position of the screw nut 9-5 moving downwards. In order to adjust the position of the limiting part conveniently, the outer wall of the guide rail sleeve 9-3 can be provided with threads, a limiting nut 9-8 is screwed on the guide rail sleeve 9-3, and the limiting can be adjusted by rotating the limiting nut 9-8.

As the pulling force applied by the lead screw assembly 9 is large, in order to avoid the reverse rotation of the transmission lead screw 9-1, the lead screw assembly 9 is set to be in a self-locking structure. The self-locking mechanism is realized by setting the lead angle of the transmission lead screw 9-1, namely the lead angle is less than 4 degrees and less than 30 degrees.

The loading handle 9-11 is fixed at the upper end of the transmission screw 9-1, and the axis of the loading handle is vertical to the axis of the transmission screw 9-1.

The utility model discloses an operation process specifically as follows:

the output shaft of the speed reducer 2 is sleeved with a radial loading adapter 6, and the speed reducer 2 is locked and fixed on an adapter fixing frame 5. The radial loading adaptor 6 is connected with a tension sensor 8, and the tension sensor 8 is connected with a lead screw assembly 9. The power of the display controller 4 is turned on. And (3) turning on the power supply of the motor 3 of the speed reducer 2 to enable the speed reducer 2 to operate at the rated input speed. And the loading handle 9-11 is rotated to enable the transmission screw rod to drive the screw rod nut 9-5 to move upwards along the guide rail sleeve 9-3, and the pulling force is radially transmitted to the output shaft of the speed reducer 2 through the tension spring 10, the tension sensor 8, the steel wire rope 7 and the radial loading adaptor 6. The tensile force value that display controller 4 can show, and then realize the moment of flexure detection of reduction gear 2 under operating condition. During this period, if the radial tension on the output shaft does not meet the experimental requirements, the loading handle 9-11 is rotated. And after the detection is finished, reversely rotating the loading handles 9-11 and unloading the tension.

Claims

1. The utility model provides a reduction gear moment of flexure performance detection device, is including the steelframe that is used for fixed reduction gear and the display controller who is used for showing the testing result, its characterized in that: the speed reducer is horizontally fixed on a bottom plate of the steel frame, and a radial loading mechanism is vertically fixed on a top plate of the steel frame; the radial loading mechanism comprises a lead screw assembly, a tension sensor and a radial loading adaptor; the screw rod assembly is vertically fixed on a top plate of the steel frame, and the displacement end of the screw rod assembly is downward vertical to an output shaft of the speed reducer; the radial loading adaptor comprises an adaptor seat, a bearing and a bearing seat, the bearing seat is sleeved on the outer wall of the adaptor seat through the bearing, and the inner wall of the adaptor seat is sleeved on the output shaft of the speed reducer and rotates synchronously with the output shaft; the upper stress end and the lower stress end of the tension sensor are respectively connected with the displacement end of the upper lead screw assembly and the lower bearing seat through connecting pieces; the tension sensor is connected with the display controller through a lead.

2. The device for detecting the bending moment performance of the speed reducer as claimed in claim 1, wherein: the screw rod assembly comprises a transmission screw rod, a positioning sleeve, a screw rod nut, a guide rail sleeve, a limiting nut and a loading handle; the loading handle is vertically fixed at the upper end of the transmission screw rod; the transmission screw comprises a section of shaft rod and a section of threaded rod; the positioning sleeve is sleeved on the shaft rod through an end face bearing, and the lower end of the positioning sleeve is fixed on the upper surface of the top plate; the transmission screw vertically penetrates through the steel frame top plate, a gap is formed between the shaft lever and the penetrating top plate and the shaft lever is matched with the penetrating top plate and rotates on the top plate, the threaded rod extends out of the lower surface of the steel frame top plate and is screwed with a screw nut, a guide rail sleeve is sleeved outside the screw nut, the upper end of the guide rail sleeve is fixed on the lower surface of the top plate, and the lower end of the screw nut extends out of the lower end of the guide rail sleeve; the upper end surface of the screw nut is provided with two horizontal and symmetrical ear parts, the cylinder wall of the guide rail sleeve is provided with two guide rail grooves parallel to the axis of the guide rail sleeve, the positions of the guide rail grooves correspond to the positions of the two ear parts, and the two ear parts are respectively inserted into the corresponding guide rail grooves; the lower end of the screw nut is provided with a connecting port which is used for being connected with the tension sensor.

3. The device for detecting the bending moment performance of the speed reducer as claimed in claim 2, wherein: and a limiting part is arranged at the position, close to the lower end of the guide rail groove, of the guide rail sleeve.

4. The device for detecting the bending moment performance of the speed reducer as claimed in claim 3, wherein: the limiting component is a limiting nut, the outer wall of the guide rail sleeve is provided with an external thread, and the limiting nut needs to be installed on the outer wall of the guide rail sleeve.

5. The device for detecting the bending moment performance of the speed reducer as claimed in claim 2, wherein: the lead angle of the transmission screw is less than 4 degrees and less than 30 degrees.

6. The device for detecting the bending moment performance of the speed reducer as claimed in claim 1, wherein: the lead screw assembly is connected with the tension sensor through a tension spring, and the tension sensor is connected with the bearing seat through a steel wire rope.