CN218749826U - Under-driven tension-controllable net stretching clamp - Google Patents

Abstract

The utility model discloses an underactuated tension-controllable net stretching clamp, which comprises a driving module, a first moving module, a second moving module, a rotating limit module, a first clamping body and a moving limit module; the driving module is connected with the first moving module and drives the first moving module to move through the driving module; the rotating module is connected with the first moving module, the second moving module and the first clamping body: the rotation of the rotating module drives the first clamping body to move in the direction opposite to the direction of the first moving module; the rotation of the rotating module is limited by the movement of the first moving module and the rotation limiting module, and the second moving module is driven to move in the same direction with the first moving module; the movement limiting module is used for limiting the movement of the first movement module. The utility model discloses a function that the tight silk screen of clamp and further tightened silk screen just can be realized in proper order to the mode of underactuation.

Description

Under-driven tension-controllable stretching net clamp

Technical Field

The utility model relates to an owe controllable net of stretching of formula tension and press from both sides belongs to the net machine equipment field of stretching.

Background

The screen printing is one of the four modern printing modes, is a typical representative of modern packaging decoration printing and special printing, and has the advantages of wide printing material, flexible printing mode, thick ink layer, strong covering power, simple process and the like. With the advancement of science and technology and the increase of various specialized demands, the screen printing technology is unprecedentedly developed, has penetrated into various fields of production and life of people, and plays a great role in special printing in various industries in modern society.

Five major elements of screen printing are: the screen stretching is a process of stretching a screen tightly on a screen frame, and is used as an important process in the manufacturing of the screen printing plate, and the screen stretching effect directly influences the final printing effect. The existing screen stretching clamps only have a simple screen clamping function, a plurality of screen stretching clamps are linearly arranged on a bottom plate, and after the screen stretching clamps clamp the screen, all the screen stretching clamps in the same direction are integrally adjusted to achieve the purpose of tensioning the screen. The net stretching clamp can only realize the clamping function, and cannot adjust the tension of the silk screen, so that the final net stretching effect is influenced, and the net stretching clamp which can realize the function of clamping the silk screen and can controllably adjust the tension of the stretched net is needed.

Disclosure of Invention

The utility model provides an owe and drive controllable screen clamp that stretches tight of formula tension can realize pressing from both sides tight silk screen through this screen clamp that stretches tight to it moves in order to further realize the tensile regulation to the silk screen to be used for driving the tight silk screen of clamp to further.

The technical scheme of the utility model is that: an underactuated tension-controllable net stretching clamp comprises a driving module 6, a first moving module, a second moving module, a rotating limiting module, a first clamping body 3 and a moving limiting module; the driving module 6 is connected with the first moving module, and the driving module 6 drives the first moving module to move; the rotating module is connected with the first moving module, the second moving module and the first clamping body 3: the rotation of the rotating module drives the first clamping body 3 to move in the direction opposite to the direction of the first moving module; the rotation of the rotating module is limited by the movement of the first moving module and the rotation limiting module, and the second moving module is driven to move in the same direction with the first moving module; the movement limiting module is used for limiting the movement of the first movement module.

The tension display device further comprises a tension display module 13, and the tension display module 13 is connected with the second moving module.

The driving module 6 can adopt a hand wheel, one side of the hand wheel is provided with a handle, and the other end of the hand wheel is provided with a shaft hole for fixedly mounting the screw rod 11.

The first moving module comprises a support 7, a lower sliding block 8 and a screw rod 11; wherein, 11 one ends of screw rod are connected with drive module 6, erection support 7 between lower slider 8 and the drive module 6, support 7, lower slider 8 are passed in proper order to the screw rod 11 other end, the shaft shoulder laminating that is equipped with on 7 both sides of support and the screw rod 11 is used for restricting the axial displacement of screw rod 11, the screw rod 11 other end is equipped with the screw thread and cooperates with lower slider 8, drive screw rod 11 through drive module 6 rotates, the axial displacement of slider 8 along screw rod 11 is driven in the rotation through screw rod 11.

The second moving module comprises a bracket 5 and an upper sliding block 4; wherein, support 5 installs on base 12, and top slide 4 cover just can move along the crossbeam on support 5's the crossbeam, and the module is rotated in top slide 4 side-mounting, is equipped with the second cramping body with first cramping body 3 complex on top slide 4, forms the grip block between first cramping body 3 and the second cramping body.

The rubber block I2-1 is arranged on the clamping surface of the first clamping body 3, and the rubber block II 2-2 is arranged on the clamping surface of the second clamping body.

The rotating module comprises a swing rod 9 and a connecting rod 10; the lower end of a connecting rod 10 is connected with the side surface of a lower sliding block 8 in a first moving module through a rotating pair, the upper end of the connecting rod 10 is connected with the lower end of a swing rod 9 through a rotating pair, the middle of the swing rod 9 is connected with the side surface of an upper sliding block 4 in a second moving module through a rotating pair, and a first clamping body 3 is installed at the upper end of the swing rod 9 through a rotating pair.

The rotation limiting module comprises an upper limiting stop pin 41 and a lower limiting stop pin 43; wherein, the upper limit stop pin 41 and the lower limit stop pin 43 fixed on the upper slider 4 in the second mobile module are positioned at the same side of the swing rod 9 in the rotating module, and the horizontal distance A between the circle center of the central circular shaft 42 for installing the swing rod 9 and the circle center of the upper limit stop pin 41 is smaller than the horizontal distance B between the circle center of the central circular shaft 42 and the circle center of the lower limit stop pin 43; the swing rod 9 rotates around the central circular shaft 42 to be tangent to the upper limiting stop pin 41, and then the first clamping body 3 arranged at the upper end of the swing rod 9 and a second clamping body in the second moving module are at the loosening limit position; the swing rod 9 rotates around the central circular shaft 42 to be tangent to the lower limit stop pin 43, and then the first clamping body 3 and the second clamping body which are arranged at the upper end of the swing rod 9 are located at the clamping limit positions.

The movable limiting module comprises two U-shaped limiting guide blocks 121 fixed on the base 12; the openings of the two U-shaped limiting guide blocks 121 face the lower sliding block 8 in the first moving module, the openings of the two U-shaped limiting guide blocks 121 have a distance, and the vertical edges of the two U-shaped limiting guide blocks 121 are used for limiting the axial moving distance of the lower sliding block 8 along the screw rod 11 in the first moving module; the horizontal edges of the two U-shaped limiting guide blocks 121 are used for guiding the lower sliding block 8.

The utility model has the advantages that: the utility model only needs the drive module to drive the swing rod to rotate, when the swing rod does not support the lower limit stop pin, the drive module drives the silk screen to be clamped, and when the swing rod supports the lower limit stop pin, the area clamped by the stretching clamp of the silk screen is further stretched through the drive module; the functions of clamping the silk screen and further tensioning the silk screen can be sequentially realized in an underactuated mode; the whole net stretching clamp is compact in structure, simple to operate, has self-locking capacity, enables clamping to be reliable, can adjust net stretching tension during net stretching and displays the current tension in real time, and therefore the net stretching tension is required and uniform, and the net stretching effect is better.

Drawings

FIG. 1 is a general structure diagram of the present invention;

FIG. 2 is a front view of the initial state of the present invention, in which the stretching clamp is in the released limit state;

FIG. 3 is a front view of the clamping state of the present invention, in which the stretching clamp is in the clamping state;

FIG. 4 is a front view of the maximum stretching stroke of the present invention, at which the stretching tension is maximum;

FIG. 5 shows the middle stretching clamp of the present invention in a loosened state;

fig. 6 is a structural view of the assembly of the driving module and the screw rod of the present invention;

fig. 7 is a structural diagram of the driving module of the present invention;

FIG. 8 is a view of the screw structure of the present invention;

fig. 9 is a schematic view of the upper slide block structure of the present invention;

fig. 10 is a schematic view of the bracket structure of the present invention;

FIG. 11 is a schematic view of the assembly of the base and the position-limiting guide block of the present invention;

FIG. 12 is a structural view of the support of the present invention;

fig. 13 is a structural diagram of a tension display module of the present invention;

the reference numbers in the figures are: the device comprises a silk screen-1, a rubber block-2, a rubber block I-2-1, a rubber block II-2-2, a first clamping body-3, an upper sliding block-4, a support-5, a driving module-6, a support-7, a lower sliding block-8, a swinging rod-9, a connecting rod-10, a screw rod-11, a base-12, a tension display module-13, an upper limit stop pin-41, a central shaft-42, a lower limit stop pin-43, a screw-61 and a limit guide block-121.

Detailed Description

Example 1: as shown in fig. 1-13, an underactuated tension-controllable net stretching clamp comprises a driving module 6, a first moving module, a second moving module, a rotating limiting module, a first clamping body 3 and a moving limiting module; the driving module 6 is connected with the first moving module, and the driving module 6 drives the first moving module to move; the rotating module is connected with the first moving module, the second moving module and the first clamping body 3: the rotation of the rotating module drives the first clamping body 3 to move in the opposite direction to the first moving module; the rotation of the rotating module is limited by the movement of the first moving module and the matching of the rotating limiting module, and the second moving module is driven to move in the same direction with the first moving module; the movement limiting module is used for limiting the movement of the first movement module.

Further, a tension display module 13 may be further included, and the tension display module 13 is connected to the second moving module.

Further, the driving module 6 may be a hand wheel, one side of the hand wheel is provided with a handle, and the other end of the hand wheel is provided with a shaft hole for fixing the screw rod 11 through the screw 61.

Further, the first moving module can be arranged to comprise a support 7, a lower slide block 8 and a screw rod 11; one end of a screw rod 11 is connected with a driving module 6, a support 7 is installed between a lower sliding block 8 and the driving module 6, the other end of the screw rod 11 sequentially penetrates through the support 7 and the lower sliding block 8, two sides of the support 7 are attached to a shaft shoulder arranged on the screw rod 11 and used for limiting axial movement of the screw rod 11 (the screw rod 11 is clamped in a round hole of the support 7 through the shaft shoulder and can rotate for 360 degrees), threads are arranged at the other end of the screw rod 11 and matched with the lower sliding block 8 (transmission threads on the screw rod 11 and the lower sliding block 8 are left-handed trapezoidal threads, the left-handed threads enable clamping and loosening operations of a tightening clamp to meet habits of most people, when layout is carried out according to the scheme shown in the figure 2, the driving module 6 is clamped clockwise, the driving module 6 is loosened by anticlockwise rotation, the trapezoidal threads can well transmit and have self-locking capacity, the tightening screen 1 cannot be loosened by self, the driving of the screw rod 11 is driven by the driving module 6, and the lower sliding block 8 is driven by rotation of the screw rod 11 to move along the axial direction of the screw rod 11. The support 7 is fixedly arranged on the base 12 through screws, and the support 7 is of a detachable structure and is divided into two halves through a round hole at the position of the mounting screw rod 11 and can be fixed together through bolts and the like.

Further, the second moving module may be provided to include a bracket 5, an upper slider 4; wherein, support 5 installs on base 12, and top slide 4 cover just can move along the crossbeam on support 5's the crossbeam, and the module is rotated in top slide 4 side-mounting, is equipped with the second cramping body with first cramping body 3 complex on top slide 4, forms the grip block between first cramping body 3 and the second cramping body. The support 5 comprises support legs and a cross beam, the support legs at two ends of the cross beam are connected through the cross beam, and the support legs are fixedly arranged on the base 12 through screws.

Furthermore, the rubber block I2-1 can be adhered to the clamping surface of the first clamping body 3 through glue, and the rubber block II 2-2 can be adhered to the clamping surface of the second clamping body through glue. The surfaces of the two rubber blocks 2 have certain elastic deformation capacity, and the rubber blocks 2 can increase the friction force when clamping the silk screen 1, so that the silk screen 1 cannot slip after being tightened.

The rotating module comprises a swing rod 9 and a connecting rod 10; the lower end of the connecting rod 10 is connected with the side face of the lower sliding block 8 in the first moving module through a revolute pair (a protrusion arranged at the lower end of the connecting rod 10 is arranged in a circular hole of the lower sliding block 8 in the first moving module and can rotate in the circular hole), the upper end of the connecting rod 10 is connected with the lower end of the oscillating rod 9 through a revolute pair (the upper end of the connecting rod 10 is connected with the lower end of the oscillating rod 9 through a pin shaft and the relative angle between the upper end of the connecting rod and the lower end of the oscillating rod 9 is rotatable), the middle of the oscillating rod 9 is connected with the side face of the upper sliding block 4 in the second moving module through a revolute pair (the middle of the oscillating rod 9 is provided with a circular hole which is matched with a central circular shaft 42 on the upper sliding block 4 in the second moving module and can rotate around the central circular shaft), and the first clamping body 3 is arranged at the upper end of the oscillating rod 9 through a revolute pair (the first clamping body 3 is arranged at the upper end of the oscillating rod 9 through a pin shaft and the first clamping body 3 can rotate around the oscillating rod 9).

Further, the rotation limiting module may include an upper limiting stop pin 41 and a lower limiting stop pin 43; wherein, the upper limit stop pin 41 and the lower limit stop pin 43 welded and fixed on the upper slide block 4 in the second mobile module are positioned at the same side of the swing rod 9 in the rotating module, and the horizontal distance A between the center of the center circular shaft 42 for installing the swing rod 9 and the center of the upper limit stop pin 41 is smaller than the horizontal distance B between the center of the center circular shaft 42 and the center of the lower limit stop pin 43; the swing rod 9 rotates around the central circular shaft 42 to be tangent to the upper limiting stop pin 41, and then the first clamping body 3 arranged at the upper end of the swing rod 9 and a second clamping body in the second moving module are at the loosening limit position; the swing rod 9 rotates around the central circular shaft 42 to be tangent to the lower limiting stop pin 43, and then the first clamping body 3 and the second clamping body which are arranged at the upper end of the swing rod 9 are positioned at the clamping limit positions; the lower limit stop pin 43 can be used to limit the clamping limit position of the rocker 9, and the upper limit stop pin 41 can be used to limit the release limit position of the rocker 9.

Further, the movable limiting module may include two U-shaped limiting guide blocks 121 fixed on the base 12; openings of the two U-shaped limiting guide blocks 121 face the lower sliding block 8 in the first moving module, the openings of the two U-shaped limiting guide blocks 121 are spaced (the vertical edges of the U-shaped guide blocks are convenient to arrange and cannot obstruct the arrangement of the screw rods 11 when the height of the vertical edges exceeds the height of the screw rods 11), and the vertical edges of the two U-shaped limiting guide blocks 121 are used for limiting the axial moving distance of the lower sliding block 8 along the screw rods 11 in the first moving module (as shown in fig. 2, namely, the left-right moving area is limited, the left vertical edge is the limit position of the tight net clamping state, and the right vertical edge is the limit position of the loose state); the horizontal edges of the two U-shaped limiting guide blocks 121 are used for guiding the lower sliding block 8, so that the deviation is avoided, the lower sliding block 8 runs stably, and the high-efficiency control of tension is facilitated.

The use of the under-actuated tension-controllable screen stretching clamp comprises four stages:

the first clamping body 3 and the second clamping body on the upper sliding block 4 in the second moving module are converted into a clamping state from an initial loosening state: rotating the driving module 6 along the direction A1, converting the rotation of the driving module 6 into that the lower slider 8 in the first moving module moves to one side in the moving limiting module through the threads on the screw rod 11, so as to drive the rotating module to rotate, enabling the oscillating rod 9 in the rotating module to rotate along the direction A2 around the central shaft until the first clamping body 3 moves to the second clamping body to be matched with and clamp the silk screen 1, and meanwhile, enabling the oscillating rod 9 to abut against the lower limiting stop pin 43 in the rotating limiting module to limit the continuous rotation of the oscillating rod 9; in an initial loosening state, the lower sliding block 8 is positioned at the movement limit position at the other side of the movement limit module;

the second clamping body on the upper sliding block 4 in the first clamping body 3 and the second moving module which are in the clamping state are driven to move towards one side in the same direction: the driving module 6 is continuously rotated along the direction A1, because the rotation of the swing rod 9 is limited by the lower limit stop pin 43, the lower slide block 8 moves towards one side in the movement limit module to drive the upper slide block 4 in the second movement module to move in the same direction as the lower slide block 8, and the clamped silk screen 1 is pulled to extend towards one side, so that the silk screen 1 is further tightened;

the first clamping body 3 and the second clamping body on the upper sliding block 4 in the second moving module are converted into a loosening state from a clamping state: rotating the driving module 6 along the direction B1 to enable the lower sliding block 8 to move to the other side in the moving limiting module, so as to drive the rotating module to rotate, and enabling the swing rod 9 to rotate around the central shaft along the direction B2 to drive the first clamping body 3 and the second clamping body to be separated, so that the silk screen 1 is loosened until the swing rod 9 abuts against an upper limiting stop pin 41 in the rotating limiting module;

the drive is in the second clamping body syntropy opposite side removal on the first clamping body 3 and the second mobile module of unclamping state on the top shoe 4: the driving module 6 continues to rotate along the direction B1, and because the rotation of the swing rod 9 is limited by the driving module 6, the lower slide block 8 moves towards the other side in the movement limiting module to drive the upper slide block 4 in the second movement module to move in the same direction as the lower slide block 8, so that the whole mechanism returns to the initial loosening state;

wherein the directions of A1 and B1 are opposite, one is clockwise and the other is anticlockwise; the A2 direction is opposite to the B2 direction, one is clockwise, and the other is anticlockwise; the rotation limiting module is positioned on one side of the rotation module close to the driving module.

The utility model discloses the working process does: before the net stretching clamp is used for stretching the net for the first time, a correction tension display module needs to be calibrated; in the embodiment example 1, the tension display module 13 uses a pull rope displacement sensor with a display screen, and the sensor senses the distance between two objects through the extending length of the pull rope. In order to enable the tension display module to accurately display the current stretching tension, the calibration and correction operation is carried out on the tension display module, and the calibration and correction operation specifically comprises the following steps: and (3) carrying out a screen stretching process, calibrating the screen as the zero point of the displacement sensor when the screen is clamped but the tension of the stretched screen is zero (namely the state shown in figure 3), then gradually stretching the screen, measuring the tension of the screen once the hand wheel rotates once (for example, twice for one time), calibrating the tension obtained by measurement as the current numerical value of the displacement sensor until the extreme position of the stretched screen is reached, and converting the displacement measured by the pull rope displacement sensor into the current tension of the stretched screen by the calibration operation. The screen stretching limit position can be reached only when the screen is calibrated, and the screen tension can reach the production requirement when the screen is printed when the screen stretching clamp does not reach the screen stretching limit position during actual screen stretching.

When the transmission threads on the screw rod 11 and the lower slider 8 are left-handed trapezoidal threads, the layout shown in fig. 2 is used as follows: when the silk screen 1 needs to be clamped, the driving module 6 is rotated clockwise, the rotation of the driving module 6 is converted into the leftward movement of the lower sliding block 8 in the guide rail 121 through the threads on the screw rod 11, so as to drive the connecting rod 10 and the oscillating rod 9, the oscillating rod 9 is rotated clockwise around the central shaft until the silk screen 1 is clamped, at this time, the rubber block 2 and the silk screen 1 are extruded and deformed, so as to stably clamp the silk screen 1, and meanwhile, the oscillating rod 9 abuts against the lower limit stop pin 43, so as to limit the continuous rotation of the oscillating rod 9 (i.e., the state in fig. 2 is changed to the state shown in fig. 3); if the driving module 6 is rotated clockwise, the entire upper sliding block 4 can only be driven to move leftward due to the limitation of the rotation of the swing link 9, and the clamped silk screen 1 is pulled to extend leftward, so as to further tighten the silk screen 1 (i.e., the state of fig. 3 is changed to the state of fig. 4). When the screen stretching is finished and the screen mesh 1 needs to be loosened, the driving module 6 is rotated anticlockwise, the lower sliding block 8 moves rightwards in the guide rail 121, so that the connecting rod 10 and the swing rod 9 are driven, the swing rod 9 rotates anticlockwise around the central shaft to loosen the screen mesh 1, and the swing rod 9 abuts against the upper limiting stop pin 41 (namely, the state in fig. 4 is changed to the state in fig. 5); if the driving module 6 continues to rotate counterclockwise, the swing rod 9 is limited to rotate, and therefore the entire upper sliding block 4 can only be driven to move rightwards, so that the entire mechanism returns to the original position (i.e. the state of fig. 5 is changed to the state of fig. 2). If the transmission threads on the screw rod 11 and the lower slider 8 are both right-handed trapezoidal threads, the lower slider 8 needs to move leftwards by the layout shown in fig. 2, and then the driving module 6 is rotated anticlockwise; when the lower sliding block 8 needs to move rightwards, the driving module 6 is rotated clockwise; other principles are not changed

Under-actuated means that the mechanism only has a driving element of the driving module 6, but has two degrees of freedom, which are respectively: the swing rod 9 rotates around the shaft and the upper sliding block 4 moves left and right integrally, and the underactuated mechanism follows the principle of minimum resistance, namely the motion with the minimum resistance is preferentially carried out (the swing rod 9 rotates around the shaft in advance). When the net is stretched, the relative distance between the tension display module 13 and the upper sliding block 4 changes correspondingly, and the tension display module 13 can display the current net stretching tension in real time through a calibration method.

While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (9)

1. The utility model provides a controllable net clamp that stretches tight of underactuated formula tension which characterized in that: the clamping device comprises a driving module (6), a first moving module, a second moving module, a rotating limiting module, a first clamping body (3) and a moving limiting module; the driving module (6) is connected with the first moving module, and the driving module (6) drives the first moving module to move; the rotating module is connected with the first moving module, the second moving module and the first clamping body (3): the rotation of the rotating module drives the first clamping body (3) to move in the direction opposite to the direction of the first moving module; the rotation of the rotating module is limited by the movement of the first moving module and the rotation limiting module, and the second moving module is driven to move in the same direction with the first moving module; the movement limiting module is used for limiting the movement of the first movement module.

2. The under-actuated tension controllable screen clamp of claim 1, wherein: the tension display device further comprises a tension display module (13), and the tension display module (13) is connected with the second moving module.

3. The under-actuated tension controllable screen clamp of claim 1, wherein: the driving module (6) adopts a hand wheel, one side of the hand wheel is provided with a hand crank, and the other end of the hand wheel is provided with a shaft hole for fixedly mounting a screw rod (11).

4. The under-actuated tension controllable screen clamp of claim 1, wherein: the first moving module comprises a support (7), a lower sliding block (8) and a screw (11); wherein, screw rod (11) one end is connected with drive module (6), erection support (7) between lower slider (8) and drive module (6), support (7) are passed in proper order to screw rod (11) other end, lower slider (8), the shaft shoulder laminating that is equipped with on support (7) both sides and screw rod (11) is used for limiting the axial displacement of screw rod (11), screw rod (11) other end is equipped with screw thread and lower slider (8) cooperation, drive through drive module (6) screw rod (11) rotate, the axial displacement of slider (8) along screw rod (11) is driven down in the rotation through screw rod (11).

5. The under-actuated tension controllable screen clamp of claim 1, wherein: the second moving module comprises a bracket (5) and an upper sliding block (4); wherein, support (5) are installed on base (12), top shoe (4) cover just can move along the crossbeam on the crossbeam of support (5), top shoe (4) side-mounting rotates the module, be equipped with on top shoe (4) with first cramping body (3) complex second cramping body, form the clamping area between first cramping body (3) and the second cramping body.

6. The under-actuated tension controllable screen tensioning clamp according to claim 5, wherein: a rubber block I (2-1) is arranged on the clamping surface of the first clamping body (3), and a rubber block II (2-2) is arranged on the clamping surface of the second clamping body.

7. The under-actuated tension controllable screen clamp of claim 1, wherein: the rotating module comprises a swing rod (9) and a connecting rod (10); the lower end of the connecting rod (10) is connected with the side face of the lower slider (8) in the first mobile module through a revolute pair, the upper end of the connecting rod (10) is connected with the lower end of the swing rod (9) through a revolute pair, the middle of the swing rod (9) is connected with the side face of the upper slider (4) in the second mobile module through a revolute pair, and the first clamping body (3) is installed at the upper end of the swing rod (9) through a revolute pair.

8. The under-actuated tension controllable screen tensioning clamp according to claim 1, wherein: the rotation limiting module comprises an upper limiting stop pin (41) and a lower limiting stop pin (43); wherein, an upper limit stop pin (41) and a lower limit stop pin (43) which are fixed on an upper slide block (4) in a second mobile module are positioned at the same side of a swing rod (9) in a rotating module, and the horizontal distance A between the circle center of a central circular shaft (42) for installing the swing rod (9) and the circle center of the upper limit stop pin (41) is smaller than the horizontal distance B between the circle center of the central circular shaft (42) and the circle center of the lower limit stop pin (43); the swing rod (9) rotates around the central circular shaft (42) to be tangent to the upper limiting stop pin (41), and then a first clamping body (3) mounted at the upper end of the swing rod (9) and a second clamping body in the second moving module are located at the loosening limit position; the swing rod (9) rotates around the central circular shaft (42) to be tangent to the lower limiting stop pin (43), and then the first clamping body (3) and the second clamping body which are arranged at the upper end of the swing rod (9) are located at clamping limit positions.

9. The under-actuated tension controllable screen clamp of claim 1, wherein: the movable limiting module comprises two U-shaped limiting guide blocks (121) fixed on the base (12); openings of the two U-shaped limiting guide blocks (121) face the lower sliding block (8) in the first moving module, a distance exists between the openings of the two U-shaped limiting guide blocks (121), and the vertical edges of the two U-shaped limiting guide blocks (121) are used for limiting the axial moving distance of the lower sliding block (8) along the screw (11) in the first moving module; the horizontal edges of the two U-shaped limiting guide blocks (121) are used for guiding the lower sliding block (8).

Images