CN214352086U - Electric sleeper bolt wrench capable of accurately controlling torque output - Google Patents

Abstract

The utility model discloses an electric sleeper bolt spanner capable of accurately controlling torque output, which comprises a driving motor, a spanner head and an output sleeve; the wrench machine head comprises a shell, a main gear, a planet gear carrier, a planet gear, a fixed gear ring, an energy storage spring, an impact head and an output shaft; a motor shaft of the driving motor extends into the shell and is connected with the main gear, and the lower end of the output shaft extends out of the shell and is connected with the output sleeve; a space is reserved between the impact head and the planet wheel carrier; the shell is provided with a detection sensor, the detection sensor is positioned between the impact head and the planet wheel carrier, and the detection sensor can detect the impact head and send out a pulse signal. The utility model discloses can accurate control apply the size of moment of torsion, make and apply the moment of torsion value size unanimous on the sleeper bolt, improve the stability of sleeper fastener system.

Description

Electric sleeper bolt wrench capable of accurately controlling torque output

Technical Field

The utility model relates to a spanner technical field especially relates to an electronic sleeper bolt spanner of ability accurate control moment of torsion output.

Background

The impact type electric sleeper bolt wrench has the advantages of light weight, large torque, high efficiency, low energy consumption, convenience in getting on and off the railway, and the like, is widely applied to the operation of railway sleeper fasteners, and along with the improvement of the fastening requirement of sleeper bolts, the performance of the sleeper wrench is required to be improved, especially the torque applied to the sleeper bolts by the impact wrench is consistent in size, and the required torque value is reached. Therefore, the spanner of predetermineeing the moment of torsion appears on the market, but the electronic sleeper bolt spanner moment of torsion of current impact type sets for control mode mainly for setting for the impact number of times: the final impact superposition residual torque value is obtained by measuring the working times of the impact head and shutting down the working motor, so as to realize control; however, under the conditions of high impact frequency, large environmental temperature change, self performance of the sensor and the like, the error of the induced impact frequency is large; and the railway sleeper fastener bolt exposes the corrosion of the field bolt for a long time, and the stained dirt can influence the impact frequency, so the error is larger in the actual work, especially the working starting moment can not be accurately detected, and the torque precision can not be met.

SUMMERY OF THE UTILITY MODEL

The aforesaid that exists to prior art is not enough, the utility model discloses a solve current torque wrench can not the accurate problem that detects the work and begin constantly and impact the number of times, provide an electronic sleeper bolt spanner that can accurate control moment of torsion output, can the accurate work begin constantly, impact constantly for the first time promptly to can accurate detection impact the number of times, thereby the size of moment of torsion is applyed in the accurate control, make and apply the torque value size unanimity on the sleeper bolt, improve sleeper fastener system's stability.

In order to solve the technical problem, the utility model discloses a technical scheme is like this: an electric sleeper bolt spanner capable of accurately controlling torque output comprises a driving motor, a spanner head and an output sleeve; the wrench machine head comprises a shell, a main gear, a planet gear carrier, a planet gear, a fixed gear ring, an energy storage spring, an impact head and an output shaft; a motor shaft of the driving motor extends into the shell and is connected with the main gear, and the lower end of the output shaft extends out of the shell and is connected with the output sleeve; the method is characterized in that: a space is reserved between the impact head and the planet wheel carrier; the shell is provided with a detection sensor, the detection sensor is positioned at an upper stroke dead center between the impact head and the planet wheel carrier, and when the impact head moves upwards to the upper stroke dead center, the detection sensor can detect the impact head and send out a pulse signal.

Further, the driving motor is a direct current brushless motor.

Furthermore, the main gear is fixedly connected with the motor shaft, and the axial direction of the main gear is consistent with the axial direction of the motor shaft; the planet wheel carrier comprises an upper connecting disc, a lower connecting disc and a mandrel, wherein the upper end of the mandrel is fixedly connected with the lower connecting disc, and the lower end of the mandrel is rotatably connected with an output shaft; a through hole is formed in the middle of the upper connecting disc and corresponds to the main gear, and the lower end of the main gear penetrates through the through hole and is then rotatably connected with the lower connecting disc; the planetary gears are in a plurality and are rotationally connected with the upper connecting disc and the lower connecting disc through rotating shafts, and the planetary gears are meshed with the main gear; the fixed gear is sleeved outside the planetary gears and fixedly connected with the shell, and simultaneously, all the planetary gears are meshed with the fixed gear;

the section of the impact head is U-shaped, the bottom of the impact head is provided with a shaft hole, and the impact head is sleeved on the mandrel through the shaft hole and is in clearance fit with the mandrel; the hole wall of the shaft hole is connected with the mandrel through a plurality of steel balls, a spiral groove is wound on the mandrel along the axial direction of the mandrel, one side of each steel ball is embedded into the spiral groove, the other side of each steel ball is embedded into the impact head, and the mandrel can drive the impact head to synchronously rotate through the steel balls; the energy storage spring is sleeved on the mandrel, the upper end of the energy storage spring is fixedly connected with the lower connecting disc, and the lower end of the energy storage spring is fixedly connected with the bottom of the impact head; the upper end of the output shaft is connected with a transmission disc, the lower end of the impact head is provided with an impact lug, the upper side of the transmission disc is provided with a transmission lug, the impact lug and the transmission lug are positioned on the same circumference with a mandrel axis as the center, and in the rotation process of the impact head, the transmission disc can be driven to rotate through the cooperation of the impact lug and the transmission lug.

Further, the shaft hole is a tapered hole with a small upper part and a large lower part.

Further, the energy storage spring comprises a main spring and an auxiliary spring, the main spring is sleeved on the auxiliary spring, the upper ends of the main spring and the auxiliary spring are connected with the lower connecting disc, and the lower ends of the main spring and the auxiliary spring are connected with the bottom of the impact head.

Furthermore, a radial bearing is arranged between the upper connecting disc and the top of the shell.

Further, the number of the planet gears is 3, and the planet gears are evenly distributed around the main gear in a circle.

Further, the detection sensor is a proximity sensor, a position sensor, a hall sensor or a photoelectric sensor.

Compared with the prior art, the utility model has the advantages of as follows:

this scheme is through the mode that detects the position of impact head, can accurate detection first impact, thereby accurate judgement spanner work begins, and can accurate detection impact the number of times that the head shifts up, thereby can accurate detection impact the number of times, thus, the controller of spanner only needs the stack to detect the pulse signal that sends, can accurately obtain the number of times of strikeing, the pulse signal that the detection sensor detected to send gives the controller, the controller is according to the rotational speed and the operating duration (impact the number of times) of the set torque value output control signal control motor, thereby the size of moment of torsion is applyed in accurate control, make the torque value size unanimous on applying the sleeper bolt, improve the stability of sleeper fastener system.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1 driving a motor; 2, a shell; 3, a main gear; 41 an upper connecting disc; 42 lower connecting disc; 43 a mandrel; 5 a planetary gear; 6 fixing the gear ring; 71 a main spring; 72 pairs of springs; 8, impacting a head; 9 an output shaft; 10 an output sleeve; 11 a detection sensor; 12 steel balls; 13 drive the disc.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example (b): referring to fig. 1, an electric sleeper bolt wrench capable of precisely controlling torque output includes a driving motor 1, a wrench head, and an output socket 10. The driving motor 1 is a brushless direct current motor, so that the starting torque is large, and the control accuracy is higher. The wrench machine head comprises a shell 2, a main gear 3, a planet gear carrier, a planet gear 5, a fixed gear ring 6, an energy storage spring, an impact head 8 and an output shaft 9; the motor shaft of the driving motor 1 extends into the shell 2 and is connected with the main gear 3, and the lower end of the output shaft 9 extends out of the shell 2 and is connected with the output sleeve 10.

In the specific assembling process, the main gear 3 is fixedly connected with a motor shaft, and the axial direction of the main gear 3 is consistent with the axial direction of the motor shaft. The planet wheel carrier comprises an upper connecting disc 41, a lower connecting disc 42 and a mandrel 43, wherein the upper end of the mandrel 43 is fixedly connected with the lower connecting disc 42, and the lower end of the mandrel 43 is rotatably connected with the output shaft 9. A through hole is arranged in the middle of the upper connecting disc 41 corresponding to the main gear 3, and the lower end of the main gear 3 is rotatably connected with the lower connecting disc 42 after passing through the through hole. The planetary gears 5 are in a plurality and are rotationally connected with the upper connecting disc 41 and the lower connecting disc 42 through rotating shafts, and the planetary gears 5 are meshed with the main gear 3; in practice, the number of the planetary gears 5 is 3, and the planetary gears are uniformly distributed around the main gear 3 for one circle, so that the stability of torque transmission is better. The fixed gear ring 6 is sleeved outside the planetary gears 5 and is fixedly connected with the shell 2, and meanwhile, all the planetary gears 5 are meshed with the fixed gear. Thus, the planet gear 5 rotates when the driving motor 1 drives the main gear 3 to rotate; due to the action of the fixed gear ring 6, the planetary gear 5 rotates around the inner ring of the fixed gear ring 6 in the rotating process, so that the planetary gear carrier is driven to rotate. The driving motor 1 realizes planetary reduction through the main gear 3 and the planetary gears 5, and the structure has the advantages of large reduction ratio, smaller volume and lighter weight. A radial bearing is provided between the upper connection plate 41 and the top of the housing 2 to further improve stability during rotation.

The section of the impact head 8 is U-shaped, the bottom of the impact head is provided with a shaft hole, and the impact head 8 is sleeved on the mandrel 43 through the shaft hole and is in clearance fit with the mandrel 43 (and can freely move along the mandrel 43); wherein, a space is arranged between the impact head 8 (upper end surface) and the planet wheel carrier (lower connecting disc 42). The hole wall of the shaft hole is connected with a mandrel 43 through a plurality of steel balls 12, a spiral groove is wound on the mandrel 43 along the axial direction of the mandrel 43, one side of each steel ball 12 is embedded into the spiral groove, the other side of each steel ball 12 is embedded into the impact head 8, and the mandrel 43 can drive the impact head 8 to synchronously rotate through the steel balls 12; the shaft hole is a tapered hole with a small upper part and a large lower part, so that the impact head 8 can move up and down quickly. During actual assembly, in an initial state, the steel ball 12 is located at the end of the lower end of the spiral groove, so that when the impact head 8 is not subjected to resistance or is subjected to small resistance, the spindle 43 rotates to drive the impact head 8 to synchronously rotate.

The energy storage spring is sleeved on the mandrel 43, the upper end of the energy storage spring is fixedly connected with the lower connecting disc 42, and the lower end of the energy storage spring is fixedly connected with the bottom of the impact head 8; in specific implementation, the energy storage spring comprises a main spring 71 and an auxiliary spring 72, the main spring 71 is sleeved on the auxiliary spring 72, the upper ends of the main spring 71 and the auxiliary spring 72 are both connected with the lower connecting disc 42, and the lower ends of the main spring 71 and the auxiliary spring 72 are both connected with the bottom of the impact head 8; the energy storage spring is composed of a main (compression) spring and a secondary (compression) spring, and the structure can ensure the stability of kinetic energy output each time to the maximum extent. The upper end of the output shaft 9 is connected with a transmission disc 13, the lower end of the impact head 8 is provided with an impact lug, the upper side of the transmission disc 13 is provided with a transmission support lug, the impact lug and the transmission support lug are positioned on the same circumference with the axis of a mandrel 43 as the center, and in the rotating process of the impact head 8, the transmission disc 13 can be driven to rotate through the matching of the impact lug and the transmission support lug. Preferably, the impact lug and the transmission lug are two and are respectively positioned on the same diameter, so that the stability of torque transmission is further improved.

The casing 2 is provided with a detection sensor 11, the detection sensor 11 is positioned between the impact head 8 and the planet carrier, when the impact head 8 moves up to the top stroke dead center, the detection sensor 11 can detect the impact head 8 (the detection is completed after the impact head 8 moves down and resets), and a pulse signal is sent. The detection sensor 11 is a proximity sensor, a hall sensor, a photoelectric sensor, a contact sensor, or the like, so that the detection stability is improved. In the practical implementation process, the output end of the detection sensor 11 is connected with the controller of the wrench, so that the controller of the wrench can accurately acquire the moment of the first impact, and the impact times can be accurately obtained only by superposing the pulse signals detected and sent by the detection sensor 11, thereby accurately controlling the magnitude of the applied torque.

In the working process, the driving motor 1 drives the main gear 3 to rotate through the motor shaft, the main gear 3 drives the planetary gear 5 to rotate, the planetary gear 5 performs circular deceleration motion along the fixed gear ring 6, and the mandrel 43 and the planetary gear carrier perform circular motion together because the planetary carrier and the mandrel 43 are in an integrated structure. The spindle 43 rotates to drive the steel balls 12 to rotate synchronously, wherein the steel balls 12 are embedded in the spindle 43 and the impact head 8, so that the steel balls 12 drive the impact head 8 to rotate, the impact head 8 drives the output shaft 9 to rotate through the cooperation of the impact lug and the transmission support lug, and the output shaft 9 drives the output sleeve 10 to rotate to form initial torque output. When the output sleeve 10 drives the workpiece (nut or screw) to rotate and the torque force is increased to overcome the pressure of the energy storage spring and the friction force between the spiral groove of the mandrel 43 and the steel ball 12, due to the limitation of the steel ball 12, the impact head 8 compresses the energy storage spring along the spiral groove of the mandrel 43 to move upwards in an axial direction, when the height of the axial movement exceeds the height of the transmission support lug, the impact head 8 is separated from the output shaft 9, the mandrel 43 is driven by the steel ball 12 to impact and rotate again, after the rotating distance exceeds the width of the transmission support lug, the compression force of the energy storage spring is released to drive the impact head 8 to move downwards along the spiral groove of the mandrel 43 in the axial direction, the impact lug below the impact head 8 impacts the transmission support lug again to generate impact torque, and the torque is transmitted to the workpiece (nut or screw) through the output sleeve 10 sleeved on the output shaft 9 to complete one-time torque output; so as to achieve the fastening or loosening of the workpiece (nut or screw). A detection sensor 11 mounted on the housing 2 is able to detect each (in particular the first) axial movement of the impact head 8 and output a pulse signal which is transmitted to the controller of the wrench; the controller of the wrench can control the rotating speed and the running time (impact times) of the motor according to the corresponding parameters of the set torque value, thereby accurately controlling the output torque.

This scheme is through the mode that detects the position of impact head 8, can accurate detection first impact, thereby accurate judgement spanner work does work and begins, and can accurate detection impact head 8 number of times that moves up, thereby can accurate detection impact number of times, like this, the controller of spanner only needs the stack to detect the pulse signal that sends of sensor 11, can accurately obtain the impact number of times, the pulse signal that detection sensor 11 detected and sent gives the controller, the controller is according to setting for the rotational speed and the operating duration (impact number of times) of torque value output control signal control motor, thereby the size of moment of torsion is applyed in the accurate control, make the torque value size unanimous on applying the sleeper bolt, improve sleeper fastener system's stability.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all should be covered in the scope of the claims of the present invention.

Claims (8)

1. An electric sleeper bolt spanner capable of accurately controlling torque output comprises a driving motor, a spanner head and an output sleeve; the wrench machine head comprises a shell, a main gear, a planet gear carrier, a planet gear, a fixed gear ring, an energy storage spring, an impact head and an output shaft; a motor shaft of the driving motor extends into the shell and is connected with the main gear, and the lower end of the output shaft extends out of the shell and is connected with the output sleeve; the method is characterized in that: a space is reserved between the impact head and the planet wheel carrier; the shell is provided with a detection sensor which is positioned at an upper stroke dead point between the planetary wheel frames of the impact heads, and when the impact heads move up to the upper stroke dead point, the detection sensor can detect the impact heads and send out pulse signals.

2. The electric sleeper bolt spanner capable of accurately controlling torque output according to claim 1, wherein: the driving motor adopts a direct current brushless motor.

3. The electric sleeper bolt spanner capable of accurately controlling torque output according to claim 1, wherein: the main gear is fixedly connected with a motor shaft, and the axial direction of the main gear is consistent with the axial direction of the motor shaft; the planet wheel carrier comprises an upper connecting disc, a lower connecting disc and a mandrel, wherein the upper end of the mandrel is fixedly connected with the lower connecting disc, and the lower end of the mandrel is rotatably connected with an output shaft; a through hole is formed in the middle of the upper connecting disc and corresponds to the main gear, and the lower end of the main gear penetrates through the through hole and is then rotatably connected with the lower connecting disc; the planetary gears are in a plurality and are rotationally connected with the upper connecting disc and the lower connecting disc through rotating shafts, and the planetary gears are meshed with the main gear; the fixed gear is sleeved outside the planetary gears and fixedly connected with the shell, and simultaneously, all the planetary gears are meshed with the fixed gear;

the section of the impact head is U-shaped, the bottom of the impact head is provided with a shaft hole, and the impact head is sleeved on the mandrel through the shaft hole and is in clearance fit with the mandrel; the hole wall of the shaft hole is connected with the mandrel through a plurality of steel balls, a spiral groove is wound on the mandrel along the axial direction of the mandrel, one side of each steel ball is embedded into the spiral groove, the other side of each steel ball is embedded into the impact head, and the mandrel can drive the impact head to synchronously rotate through the steel balls; the energy storage spring is sleeved on the mandrel, the upper end of the energy storage spring is fixedly connected with the lower connecting disc, and the lower end of the energy storage spring is fixedly connected with the bottom of the impact head; the upper end of the output shaft is connected with a transmission disc, the lower end of the impact head is provided with an impact lug, the upper side of the transmission disc is provided with a transmission lug, the impact lug and the transmission lug are positioned on the same circumference with a mandrel axis as the center, and in the rotation process of the impact head, the transmission disc can be driven to rotate through the cooperation of the impact lug and the transmission lug.

4. An electric sleeper bolt spanner capable of accurately controlling torque output according to claim 3, characterized in that: the shaft hole is a tapered hole with a small upper part and a big lower part.

5. An electric sleeper bolt spanner capable of accurately controlling torque output according to claim 3, characterized in that: the energy storage spring comprises a main spring and an auxiliary spring, the auxiliary spring is sleeved on the main spring, the upper ends of the main spring and the auxiliary spring are connected with the lower connecting disc, and the lower ends of the main spring and the auxiliary spring are connected with the bottom of the impact head.

6. An electric sleeper bolt spanner capable of accurately controlling torque output according to claim 3, characterized in that: a radial bearing is arranged between the upper connecting disc and the top of the shell.

7. An electric sleeper bolt spanner capable of accurately controlling torque output according to claim 3, characterized in that: the number of the planetary gears is 3, and the planetary gears are evenly distributed around the main gear in a circle.

8. The electric sleeper bolt spanner capable of accurately controlling torque output according to claim 1, wherein: the detection sensor adopts a proximity sensor, a position sensor, a Hall sensor or a photoelectric sensor.

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