CN218674488U - Double-drive cooperative displacement control mechanism and pressure testing machine applying same - Google Patents

Abstract

The application relates to a two drive concerted movement control mechanism and use its compression testing machine, displacement control mechanism include base, slider, lead screw, first driving piece and second driving piece, the screw rod and the base of lead screw rotate to be connected, the axial of lead screw is slided with the base along the slider and is connected, first driving piece connect in the screw rod of lead screw rotates with driving screw, the second driving piece connect in the nut of lead screw rotates with driving nut. This application has the effect that promotes displacement control efficiency when promoting displacement control precision.

Description

Double-drive cooperative displacement control mechanism and pressure testing machine applying same

Technical Field

The application relates to the field of displacement control instruments, in particular to a double-drive cooperative displacement control mechanism and a pressure testing machine applying the same.

Background

The screw rod is a displacement control mechanism for converting rotary motion into linear motion, and becomes one of the most commonly used transmission elements on precision machinery by virtue of the lockable characteristic of a threaded connection mode and the advantages of height precision, reversibility and high efficiency.

The lead screw includes screw rod and nut, and the screw rod is generally connected in the output shaft of motor, and the nut generally connects on the object that needs to drive, and the motor drives the screw rod and rotates, and the drive nut rectilinear sliding to drive the object rectilinear sliding.

In view of the above-mentioned related arts, the inventor has considered that the speed regulation accuracy and the speed regulation range of the general motor are limited, and in a scene where the displacement control accuracy is required, when a motor with a high rotation speed is selected, the positioning accuracy of the nut is high, but the positioning accuracy is reduced due to the inertia of the output shaft, and the like.

SUMMERY OF THE UTILITY MODEL

In order to improve displacement control efficiency while improving displacement control accuracy, the application provides a double-drive coordinated type displacement control mechanism.

The application provides a pair of cooperation formula displacement control mechanism that drives adopts following technical scheme:

the utility model provides a two drive concerted movement control mechanism, includes base, slider, lead screw, first driving piece and second driving piece, the screw rod and the base of lead screw rotate to be connected, the slider slides along the axial of lead screw with the base to be connected, first driving piece connect in the screw rod of lead screw rotates with the driving screw, the second driving piece connect in the nut of lead screw rotates with the driving nut.

By adopting the technical scheme, the first driving piece drives the screw rod of the screw rod to rotate, so that the sliding block can be driven to slide, the second driving piece drives the nut of the screw rod to rotate, and the sliding block can also be driven to slide, when the first driving piece and the second driving piece drive the nut simultaneously, and the screw rod rotates reversely, the sliding block can be accelerated to move, speed superposition is realized, and when the first driving piece and the second driving piece drive the nut simultaneously, differential sliding of the sliding block can be realized when the screw rod rotates in the same direction, differential control can realize downward regulation of the moving speed of the sliding block, and the moving precision of the sliding block is improved.

Preferably, the second driving part comprises a worm wheel, a worm and a second motor, the worm wheel is coaxially and fixedly sleeved on the nut of the screw rod and is rotatably connected with the sliding block, an output shaft of the second motor is coaxially fixed with the worm, and the worm is meshed with the worm wheel.

Through adopting above-mentioned technical scheme, drive the worm through the second motor, the worm drives the worm wheel, and the worm wheel drives the nut and rotates to this drives the slider and goes up and down, and worm wheel, worm can increase the moment of torsion.

Preferably, at least one of the first driving member and the second driving member is connected with a rotating speed regulator.

By adopting the technical scheme, the rotating speed of the first driving part and the rotating speed of the second driving part can be adjusted through the rotating speed adjuster, so that the moving speed adjusting range of the sliding block can be expanded.

Preferably, the rotation speed range of the screw when the first driving member acts on the screw of the screw rod is different from the rotation speed range of the nut when the second driving member acts on the nut of the screw rod.

By adopting the technical scheme, the rotating speed range of the screw is inconsistent with that of the nut, so that the phenomenon that the sliding block is immobilized when the first driving piece and the second driving piece are differential can be avoided.

Preferably, at least one of the first driving member and the second driving member is connected with a brake.

Through adopting above-mentioned technical scheme, can in time brake first driving piece and second driving piece through the stopper to this momentum inertia that avoids two drives to cooperate and lead to is too big, promotes control accuracy.

Preferably, the number of the screw rods is two, and the two screw rods are parallel to each other and symmetrically distributed on two sides of the base;

the first driving piece comprises reduction boxes and first motors, the reduction boxes correspond to the screw rods one by one, and the first motors are in transmission connection with the two reduction boxes;

the worm wheel and the worm are provided with two groups which respectively correspond to the two groups of screw rods, and the two worms are detachably connected through a coupler.

By adopting the technical scheme, the two reduction gearbox can be driven by the first motor at the same time, and the two sets of worm wheels and worms can be driven by the second motor and the coupler, so that the whole sliding block can smoothly move, deflection and vibration are reduced, and the operation stability is improved.

Preferably, the base is provided with at least two guide rods parallel to each other, and the slide block is slidably sleeved on the guide rods.

Through adopting above-mentioned technical scheme, lead to the slider through the guide bar to this makes the slider whole level and smooth removal, reduces deflection, vibrations, promotes the operating stability.

Preferably, the device further comprises a first input module and a control module connected with the first input module, the control module is connected with the first driving piece and the second driving piece, and the first input module is used for outputting a high-speed signal or a low-speed signal;

the control module responds to the high-speed signal, enters a high-speed mode, and adjusts the steering directions of the first driving piece and the second driving piece so as to enable the screw rod and the nut of the screw rod to rotate reversely;

and the control module responds to the low-speed signal, enters a low-speed mode, and adjusts the steering directions of the first driving piece and the second driving piece so as to enable the screw rod and the nut of the screw rod to rotate in the same direction.

By adopting the technical scheme, the first input module can adjust the steering direction of the first driving piece and the second driving piece, so that the screw rod and the nut of the screw rod rotate forwards/backwards to realize speed-shifting superposition or differential operation, the high-speed mode is started when high-speed sliding is needed, the low-speed mode is started when low-speed sliding is needed, and the sliding block speed shifting is flexibly adjusted.

Preferably, the control module is connected with a second input module, and the second input module is used for outputting an ascending signal or a descending signal;

in a low-speed mode, the control module responds to the rising signal and controls the rotation direction and/or the rotation speed of the first driving piece and the second driving piece so that the combined speed of the screw rod and the nut acting on the sliding block is upward;

in the low-speed mode, the control module responds to the descending signal and adjusts the rotating direction and/or the rotating speed of the first driving piece and the second driving piece so that the combined speed of the screw rod and the nut acting on the sliding block is downward.

By adopting the technical scheme, the second input module can control the steering direction and/or the rotating speed of the first driving piece and the second driving piece so as to control the combined speed direction and the speed of the sliding block, so that the sliding block can be lifted or lowered in a high-speed mode and a low-speed mode.

In order to improve the test efficiency while improving the test precision, the application provides a compression testing machine, adopts following technical scheme:

a pressure testing machine comprises the double-drive cooperative displacement control mechanism.

By adopting the technical scheme, the double-drive cooperative displacement control mechanism is applied, the accelerated motion of the sliding block can be carried out before the sliding block is contacted with a test material in the preparation stage, and the differential control is carried out in the test pressure application stage, so that the synchronous promotion of the test efficiency and the test precision is realized.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the first driving piece and the second driving piece simultaneously drive the nut and the screw to rotate reversely, the sliding block can be lifted to move at an accelerated speed, so that the speed superposition is realized, and when the first driving piece and the second driving piece simultaneously drive the nut and the screw to rotate in the same direction, the differential sliding of the sliding block can be realized, the differential control can realize the downward regulation of the moving speed of the sliding block, so that the moving precision of the sliding block is improved, and the overall performance is improved;

2. the two reduction boxes can be driven simultaneously through the first motor, and the two worm wheels and the worm can be driven through the second motor and the coupler, so that the whole sliding block can smoothly move, deflection and vibration are reduced, and the operation stability is improved;

3. the first input module can adjust the steering directions of the first driving piece and the second driving piece, so that a screw rod and a nut of the screw rod rotate forwards/backwards to realize moving speed superposition or differential operation, a high-speed mode is started when high-speed sliding is needed, a low-speed mode is started when low-speed sliding is needed, and the moving speed of the sliding block is flexibly adjusted.

Drawings

Fig. 1 is an overall configuration diagram of a double-drive cooperative type displacement control mechanism according to an embodiment of the present application.

Fig. 2 is a side view of the double-drive cooperative type displacement control mechanism according to the embodiment of the present application.

Fig. 3 isbase:Sub>A schematic sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2, mainly showing the worm wheel and the worm.

Fig. 4 is a block diagram of an embodiment of the present application.

Description of the reference numerals: 1. a base; 11. a guide bar; 12. a slider; 13. a mounting seat; 2. a screw rod; 21. a screw; 22. a nut; 3. a first driving member; 31. a reduction gearbox; 32. a first motor; 33. a drive shaft; 4. a second driving member; 41. a worm gear; 42. a worm; 43. a second motor.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a double-drive cooperative displacement control mechanism. Referring to fig. 1 and 2, the dual-drive cooperative displacement control mechanism includes a base 1, a slider 12, a screw rod 2, a first driving member 3 and a second driving member 4, a screw rod 21 of the screw rod 2 is rotatably connected with the base 1, the slider 12 is slidably connected with the base 1 along an axial direction of the screw rod 2, and the first driving member 3 is connected to the screw rod 21 of the screw rod 2 to drive the screw rod 21 to rotate.

Referring to fig. 2 and 3, the second driving member 4 is connected to the nut 22 of the lead screw 2 to drive the nut 22 to rotate. When the first driving part 3 and the second driving part 4 simultaneously drive the nut 22 and the screw 21 to rotate reversely, the sliding block 12 is overlapped in moving speed, and when the first driving part 3 and the second driving part 4 simultaneously drive the nut 22 and the screw 21 to rotate in the same direction, the sliding of the sliding block 12 in differential speed can be realized, so that the operation efficiency is improved, and the control precision is also considered.

Referring to fig. 1 and 3, a mounting seat 13 is arranged above the base 1, the base 1 and the mounting seat 13 are both in a square plate shape and are parallel to each other, the base 1 and the mounting seat 13 are connected through four guide rods 11, the guide rods 11 are in a circular rod shape, the four guide rods 11 are respectively located on four corners of the base 1, one end of each guide rod 11 is fixed to the base 1 through a bolt, and the other end of each guide rod 11 is fixed to the mounting seat 13 through a bolt. Slider 12 is located between base 1 and the mount pad 13, is square plate shape, and is parallel to each other with base 1, and four guide bar 11 pass four corners of slider 12 respectively to this guides slider 12's slip, promotes slip precision and stability.

The two groups of screw rods 2 are parallel to each other, the two groups of screw rods 2 are respectively positioned on two sides of the sliding block 12, each group of screw rods 2 is positioned in the middle of two adjacent guide rods 11, the first driving piece 3 is positioned on the mounting seat 13 and connected with the top end of a screw rod 21 of the screw rod 2, and the second driving piece 4 is positioned on the sliding block 12 and connected with a nut 22 of the screw rod 2. The top end of a screw rod 21 of the screw rod 2 is rotatably connected with the mounting seat 13 through a bearing, and the bottom end of the screw rod is rotatably connected with the base 1 through a bearing.

The first driving part 3 comprises a first motor 32, a transmission shaft 33 and reduction boxes 31, the reduction boxes 31 are provided with two, each reduction box 31 is provided with at least two input shafts and at least one output shaft, the two input shafts which are oppositely arranged are coaxially fixed through the transmission shaft 33, two ends of the transmission shaft 33 are respectively in key connection with the input shafts of the two reduction boxes 31, the input shaft of one reduction box 31 is in key connection with the input shaft of the first motor 32, the two input shafts of the reduction box 31 are coaxially fixed, the output shaft of the reduction box 31 is in key connection with a screw 21 of the screw rod 2, and the reduction boxes 31 are in one-to-one correspondence with the screw rod 2.

The second driving member 4 includes a worm wheel 41, a worm 42 and a second motor 43, the worm wheel 41 is coaxially fixed and sleeved on the nut 22 of the screw rod 2, a circular hole for placing the worm wheel 41 and the nut 22 is formed in the slider 12, the top and the bottom of the nut 22 are rotatably connected with the slider 12 through bearings respectively, two bearings are also located in the circular hole, and the worm wheel 41 is located between the two bearings. Two sets of worm wheels 41 and two sets of worms 42 are respectively corresponding to the two screw rods 2, the worms 42 penetrate through the sliding block 12 and are meshed with the worm wheels 41, the two worms 42 are axially consistent and are coaxially fixed through a coupler, and an output shaft of the second motor 43 is connected with one of the worm 42 in a key mode.

The first motor 32 and the second motor 43 can both adopt servo motors and can realize forward and reverse rotation, the first motor 32 and the second motor 43 are both connected with a rotating speed regulator, and the rotating speed regulator can adopt a PLC (programmable logic controller), a frequency converter and the like and is used for regulating the rotating speeds of the first motor 32 and the second motor 43, so that the moving speed range of the lead screw 2 after superposition or differential motion is expanded, and the applicability is improved. And the rotating speed range of the screw 21 when the first motor 32 acts on the screw 21 of the screw rod 2 is different from the rotating speed range of the nut 22 when the second driving element 4 acts on the nut 22 of the screw rod 2, specifically, the rotating speed range of the first motor 32 is multiplied by the transmission reduction ratio of the reduction box 31, that is, the rotating speed range of the screw rod 21 when the first motor 32 acts on the screw 21 of the screw rod 2, and similarly, the rotating speed range of the second motor 43 is multiplied by the transmission reduction ratio of the worm wheel 41 and the worm 42, that is, the rotating speed range of the nut 22 when the first motor 32 acts on the nut 22 of the screw rod 2, so that the nut 22 of the screw rod 2 and the screw rod 21 rotate in the same direction and at the same speed to offset each other, and the sliding block 12 is prevented from being stopped.

All be connected with the stopper on first motor 32 and the second motor 43, the stopper can adopt the brake of SMB0S2AA model, and direct action is in the output shaft of first motor 32 and second motor 43, and the inertia of motion of reducible output shaft realizes quick brake, promotes the holistic control accuracy of displacement control mechanism.

Referring to fig. 1 and 4, the first motor 32 and the second motor 43 are connected to the same control module, the control module is connected to a first input module and a second input module, the first input module and the second input module can adopt external input devices such as a control panel, a keyboard, a mouse and the like, and the control module can adopt terminal devices such as a single chip microcomputer, a PLC controller, a calculator and the like.

The first input module is used for responding to actions of workers and outputting high-speed signals or low-speed signals, and the actions comprise pressing, sounding, touching, gestures and the like. The high-speed signal and the low-speed signal are respectively used for controlling the high-speed movement and the low-speed movement of the sliding block 12, the second input module is used for responding to the action of a worker to output an ascending signal or a descending signal, the ascending signal and the descending signal are respectively used for controlling the ascending and descending of the sliding block 12, and the control mode is as follows:

referring to fig. 1 and 3, the control module responds to the high-speed signal, enters a high-speed mode, and adjusts the rotation directions of the first motor 32 and the second motor 43 to enable the screw 21 and the nut 22 of the screw rod 2 to rotate reversely;

the control module responds to the low-speed signal, enters a low-speed mode, and adjusts the rotation directions of the first motor 32 and the second motor 43 so as to enable the screw 21 of the screw rod 2 to rotate in the same direction as the nut 22.

When the screw 21 and the nut 22 rotate in opposite directions, the moving speeds of the sliding block 12 are superposed, the resultant speed is increased, and when the screw 21 and the nut 22 rotate in the same direction, the moving speeds of the sliding block 12 are different, and the resultant speed is reduced.

In the low-speed mode, the control module responds to the rising signal and controls the rotation direction and/or the rotation speed of the first motor 32 and the second motor 43 so that the combined speed of the screw 21 of the screw rod 2 and the nut 22 acting on the slide block 12 is upward;

specifically, if the rotation speed of the first motor 32 is greater than that of the second motor 43, the first motor 32 controls the screw rod 2 to ascend, the slider 12 is controlled to move upward, and the second motor 43 drives the nut 22 of the screw rod 2 to rotate in the same direction as the screw rod 21 of the screw rod, so that the overall moving speed of the slider 12 is kept in a low-speed state.

In the low speed mode, the control module responds to the descending signal and adjusts the rotation direction and/or the rotation speed of the first motor 32 and the second motor 43 so as to enable the combined speed of the screw 21 of the screw rod 2 and the nut 22 acting on the slide block 12 to be downward.

Specifically, if the rotation speed of the first motor 32 is greater than that of the second motor 43, the first motor 32 controls the sliding block 12 to descend, the sliding block 12 moves downward, and the second motor 43 drives the nut 22 of the screw rod 2 to rotate in the same direction as the screw rod 21 of the screw rod, so that the overall moving speed of the sliding block 12 is kept in a low-speed state.

In a high-speed state, the first motor 32 and the second motor 43 are only controlled to drive the nut 22 of the screw rod 2 and the screw rod 21 to rotate in opposite directions, and at this time, if the first motor 32 is controlled to drive the slide block 12 to ascend, the second motor 43 is controlled to drive the slide block 12 to ascend, and the slide block 12 ascends in an accelerated manner; on the contrary, if the first motor 32 is controlled to drive the slider 12 to descend, the second motor 43 is controlled to drive the slider 12 to descend, and the slider 12 is accelerated to descend.

The embodiment also provides a pressure testing machine, which comprises a force sensor and the double-drive cooperative displacement control mechanism. The force sensor can be installed between the slider 12 and the base 1 or between the slider 12 and the mounting base 13, for example, the force sensor is installed between the slider 12 and the base 1, and when the force sensor is located at the bottom of the slider 12, a test material is placed between the slider 12 and the base 1, the first input module enters a high-speed mode to enable the slider 12 to be quickly close to the test material, when the slider 12 and the test material are about to be contacted, the low-speed mode is switched, the combined speed of the screw 21 of the screw rod 2 and the nut 22 acting on the slider 12 is downward, the slider 12 is controlled to slowly apply pressure to the test material, and the force value when the test material is damaged is detected through the force sensor, so that information such as compressive strength can be detected.

The implementation principle of the dual-drive cooperative displacement control mechanism in the embodiment of the application is as follows: the first motor 32 drives the screw 21 of the screw rod 2 to rotate through the reduction box 31, the second motor 43 drives the nut 22 of the screw rod 2 to rotate through the worm wheel 41 and the worm 42, and the rotation directions of the first motor 32 and the second motor 43 can be controlled through the first input module, so that the nut 22 of the screw rod 2 and the screw rod 21 rotate in the opposite direction or in the same direction, and the sliding block 12 is controlled to slide at a high speed or slide at a low speed. In the low-speed mode, the first motor 32 or the second motor 43 with higher rotating speed is controlled to lead the closing speed direction of the sliding block 12, so that the sliding block 12 is controlled to ascend at low speed or descend at low speed, the running efficiency of the displacement control mechanism in the high-speed mode is high, and the control precision of the displacement control mechanism in the low-speed mode is high, so that flexible adjustment is performed according to requirements, and the overall performance of the displacement control mechanism is improved.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a two drive concerted movement control mechanism, its characterized in that, includes base (1), slider (12), lead screw (2), first driving piece (3) and second driving piece (4), screw rod (21) and base (1) of lead screw (2) rotate to be connected, slider (12) and base (1) slide along the axial of lead screw (2) and are connected, first driving piece (3) connect in screw rod (21) of lead screw (2) rotate with drive screw (21), second driving piece (4) connect in nut (22) of lead screw (2) rotate with drive nut (22).

2. The dual-drive cooperative displacement control mechanism according to claim 1, wherein the second driving member (4) comprises a worm wheel (41), a worm (42) and a second motor (43), the worm wheel (41) is coaxially and fixedly sleeved on the nut (22) of the lead screw (2) and is rotatably connected with the sliding block (12), an output shaft of the second motor (43) is coaxially fixed with the worm (42), and the worm (42) is meshed with the worm wheel (41).

3. A double drive coordinated displacement control mechanism according to claim 1, wherein a rotational speed regulator is connected to at least one of said first and second driving members (3, 4).

4. A double drive co-operating displacement control mechanism according to claim 1, wherein the range of rotation speeds of the screw (21) when the first drive member (3) acts on the screw (21) of the screw (2) is not identical to the range of rotation speeds of the nut (22) when the second drive member (4) acts on the nut (22) of the screw (2).

5. A double drive cooperating displacement control mechanism according to claim 1, wherein a brake is connected to at least one of the first drive member (3) and the second drive member (4).

6. The double-drive cooperative displacement control mechanism according to claim 2, wherein there are two sets of the screw rods (2), and the two sets of the screw rods (2) are parallel to each other and symmetrically distributed on two sides of the base (1);

the first driving piece (3) comprises reduction boxes (31) and first motors (32), the reduction boxes (31) correspond to the screw rods (2) one by one, and the first motors (32) are in transmission connection with the two reduction boxes (31);

the worm wheel (41) and the worm (42) are provided with two groups and respectively correspond to the two groups of screw rods (2), and the two worms (42) are detachably connected through a coupler.

7. The double-drive cooperative displacement control mechanism according to claim 1, wherein the base (1) is provided with at least two guide rods (11) parallel to each other, and the sliding block (12) is slidably sleeved on the guide rods (11).

8. The dual-drive cooperative displacement control mechanism according to claim 1, further comprising a first input module and a control module connected to the first input module, wherein the control module is connected to the first driving member (3) and the second driving member (4), and the first input module is configured to output a high-speed signal or a low-speed signal;

the control module responds to a high-speed signal, enters a high-speed mode, and adjusts the steering directions of the first driving piece (3) and the second driving piece (4) so as to enable the screw rod (21) and the nut (22) of the screw rod (2) to rotate reversely;

the control module responds to a low-speed signal, enters a low-speed mode, and adjusts the steering directions of the first driving piece (3) and the second driving piece (4) so as to enable the screw rod (21) and the nut (22) of the screw rod (2) to rotate in the same direction.

9. The dual drive cooperative displacement control mechanism of claim 8, wherein the control module is connected to a second input module, the second input module being configured to output a rising signal or a falling signal;

in a low-speed mode, the control module responds to the ascending signal and controls the rotation direction and/or the rotation speed of the first driving part (3) and the second driving part (4) so as to enable the screw rod (21) and the nut (22) of the screw rod (2) to act on the combined speed of the slide block (12) upwards;

in the low-speed mode, the control module responds to the descending signal and adjusts the rotation direction and/or the rotation speed of the first driving part (3) and the second driving part (4) so as to enable the screw rod (21) and the nut (22) of the screw rod (2) to act on the combined speed of the sliding block (12) downwards.

10. A compression testing machine comprising a double drive cooperative displacement control mechanism according to any one of claims 1 to 9.

Images