Adjustable rubber blanket releasing tension testing device

Abstract

The utility model relates to an adjustable rubber blanket releasing tension testing device which comprises a machine body, a controller is installed on the machine body, a lifting platform is arranged on the machine body, a driving device for driving the lifting platform to move is arranged in the machine body, a tension sensor is installed on the machine body, and the controller is connected with the controller. The tension sensor and the driving equipment are both electrically connected to the controller, a clamping block and a clamping assembly for clamping the clamping block are arranged at the end of the tension sensor, a fixed clamping block and a movable clamping block are arranged on the clamping block, a containing groove is formed between the fixed clamping block and the movable clamping block, and the clamping assembly is used for clamping the fixed clamping block and the movable clamping block. A containing step is arranged on the containing groove, an adjusting assembly for adjusting the position of the movable clamping block is arranged on the clamping block, and a limiting assembly for limiting the other end of the rubber blanket is arranged on the lifting table. The tensile force testing device has the effect of improving the applicability of the tensile force testing device.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, and particularly relates to an adjustable rubber blanket de-clamping tensile force testing device. Background Art

[0002] In the field of offset printing, the rubber blanket plays a crucial role as it is responsible for transferring the ink from the printing plate to the substrate. To ensure the smooth progress of printing, the rubber blanket needs to be firmly fixed on the transfer cylinder. However, during high-speed printing, if the fixation between the clamp and the rubber blanket is not firm enough, it may lead to printing accidents, especially the detachment of the clamp from the rubber blanket, which may cause damage to the machine and result in serious losses. Therefore, testing the force required for the clamp to detach from the rubber blanket is a key link to ensure the normal use of the rubber blanket. Currently, there is no dedicated equipment on the market for this test, and usually, existing equipment needs to be modified to some extent.

[0003] Refer to Figure 1 , the figure shows the rubber blanket 01 and the metal block 03, and a clamp 02 is installed at the end of the rubber blanket 01. A placement notch is formed on the metal block 03, and the clamp 02 is placed at the placement notch.

[0004] Refer to Figure 1 , currently, in order to test the detachment force of the clamp 02 of the rubber blanket 01, a common modification method is to install a fixed metal block 03 on the tensile force testing equipment. The clamp 02 of the rubber blanket 01 is placed in the hole of the metal block 03, and the other end is fixed to another tensile force head. By this method, the force at which the clamp 02 detaches can be measured.

[0005] Regarding the above related technologies, although the current modification scheme can achieve the purpose of measuring the detachment force of the rubber blanket clamp, since the metal block is fixed and its size cannot be adjusted, it is often difficult to take out the clamp from the hole of the metal block after the clamp detaches, which increases the difficulty of taking materials and may also cause damage to the equipment or the clamp itself during the process of taking the clamp. In addition, the design of the fixed metal block cannot meet the test requirements of rubber blanket clamps of various size specifications, reducing the applicability of the tensile force testing device. Content of the Utility Model

[0006] In order to improve the applicability of the tensile force testing device, this application provides an adjustable rubber blanket de-clamping tensile force testing device.

[0007] The adjustable rubber blanket de-clamping tensile force testing device provided by this application adopts the following technical solutions:

[0008] An adjustable gripper release tensile test device for blanket, comprising a machine body, on which a controller is installed, a lifting table is arranged on the machine body, a driving device for driving the lifting table to move is built in the machine body, a tensile sensor is installed on the machine body, both the tensile sensor and the driving device are electrically connected to the controller, a clamping block and a clamping assembly for clamping the clamping block are arranged at the end of the tensile sensor, a fixed clamping block and a movable clamping block are arranged on the clamping block, a placement groove is formed between the fixed clamping block and the movable clamping block, a placement step is arranged on the placement groove, and an adjusting assembly for adjusting the position of the movable clamping block is arranged on the clamping block, and a limiting assembly for limiting the other end of the blanket is arranged on the lifting table.

[0009] By adopting the above technical solution, when measuring the tensile force, the staff puts the clip at the end of the blanket into the placement groove, then flattens the blanket, and uses the limiting assembly to limit the blanket. Then the controller is started to make the lifting table move to pull the blanket until the end of the blanket is separated from the clip. At this time, the value displayed on the controller is the ultimate tensile force for the clip to separate from the blanket, achieving the effect of measuring the tensile force of the gripper release of the blanket. The staff uses the adjusting assembly to adjust the position of the movable clamping block to adjust the distance between the movable clamping block and the fixed clamping block. When the blanket is separated from the clip, the clip stays in the placement groove and can be conveniently taken out, reducing the operation difficulty of the tensile test device. At the same time, adjusting the size of the placement groove can also adapt to clips of various size specifications, improving the applicability of the tensile test device.

[0010] Optionally, the adjusting assembly includes an adjusting screw rod and a first moving block. A first moving groove is formed on the clamping block. The first moving block is slidably fitted in the first moving groove and is connected to the movable clamping block. The adjusting screw rod is horizontally rotatably connected to the clamping block. The adjusting screw rod passes through the first moving block and is in threaded cooperation with the first moving block.

[0011] By adopting the above technical solution, when adjusting the position of the movable clamping block, the staff rotates the adjusting screw rod to make the first moving block move, thereby driving the movable clamping block to move, achieving the effect of adjusting the position of the movable clamping block.

[0012] Optionally, the adjusting assembly includes a second moving block, a pulling column and a locking block. A second moving groove is formed on the clamping block. The second moving block is slidably fitted in the second moving groove and is connected to the movable clamping block. The pulling column is a rectangular column. One pulling column is inserted and fitted at both ends of the second moving block. A plurality of locking blocks are connected to the pulling column. A plurality of locking grooves are formed on both sides of the moving groove. When limiting the position of the movable clamping block, the locking blocks are inserted and fitted in the locking grooves.

[0013] By adopting the above technical solution, when adjusting the position of the movable clamping block, the worker pushes the pulling column, so that the locking block enters the second movable block. Then, the pulling column is moved to drive the second movable block to move. Until the movable clamping block moves to the specified position, the pulling column is moved in the reverse direction, so that the locking block moves and is inserted into the locking groove, thereby restricting the movement of the second movable block and achieving the effect of adjusting the position of the movable clamping block.

[0014] Optionally, the clamping assembly includes a first fixing frame, a first clamping plate and a clamping screw. The first fixing frame is installed at the end of the tension sensor. The first clamping plate is slidably fitted on the first fixing frame. The clamping screw is threadedly fitted on the first fixing frame and is rotatably connected to the first clamping plate. The clamping block is located between the first clamping plate and the first fixing frame.

[0015] By adopting the above technical solution, when installing the clamping block, the worker rotates the clamping screw to move the first clamping plate until the clamping block is tightly pressed between the first fixing frame and the first clamping plate, thereby restricting the degree of freedom of the clamping block and achieving the installation of the clamping block.

[0016] Optionally, the first fixing frame includes a first connecting plate, a second connecting plate, a limiting column and a locking nut. The first connecting plate is connected to the end of the tension sensor. A plurality of limiting columns are connected to the first connecting plate. The limiting columns are perpendicular to the first connecting plate. An installation step is provided at the end of the limiting column. The second connecting plate is inserted through the installation step. The locking nut is threadedly fitted on the end of the limiting column and abuts against the first connecting plate. The clamping screw is threadedly fitted on the second connecting plate. The clamping block is located between the first clamping plate and the first connecting plate.

[0017] By adopting the above technical solution, during assembly, the worker passes the first clamping plate through the limiting column, inserts the second connecting plate through the limiting column and abuts against the installation step. Then, the locking nut is rotated to make the locking nut tightly press the second connecting plate, realizing the assembly of the first fixing frame. The assembled first fixing frame is convenient for loading and unloading.

[0018] Optionally, two positioning blocks are connected to the first connecting plate. The thickness of the positioning block is less than the thickness of the clamping block. When clamping the clamping block, the clamping block is located between the two positioning blocks.

[0019] By adopting the above technical solution, the worker uses the positioning block to limit the installation position and angle of the clamping block, so that the clamp can evenly abut against the placement step when stressed, and the rubber cloth remains vertical during testing, thereby improving the measurement accuracy of the tensile testing device.

[0020] Optionally, the limiting component includes a second fixing frame, a second clamping plate, a toggling column, a connecting gear and a fixed rack. The second fixing frame is installed on the lifting platform. The second clamping plate is slidably fitted on the second fixing frame. A retaining frame is connected to the second fixing frame. A moving seat is slidably fitted on the retaining frame. The toggling column is slidably fitted on the moving seat. The connecting gear is connected to the toggling column. The fixed rack is connected to the second fixing frame and meshes with the connecting gear. The thickness of the connecting gear is greater than that of the fixed rack. A tooth groove is formed at the end of the second clamping plate. When moving, the connecting gear abuts against the retaining frame and disengages from the tooth groove. The end of the toggling column is located inside the second clamping plate. When locking, part of the connecting gear is located inside the tooth groove.

[0021] By adopting the above technical solution, when limiting the blanket, the operator pulls the toggling column to make the connecting gear abut against the retaining frame. At the same time, the connecting gear disengages from the tooth groove, and then the toggling column can be rotated to drive the second clamping plate to move until the second clamping plate presses against the blanket. Subsequently, the toggling column is pushed to insert the connecting gear into the tooth groove, thereby limiting the movement of the second clamping plate and achieving the effect of limiting the blanket.

[0022] Optionally, a stroke limiting component is provided on the machine body. The stroke limiting component includes a sliding column, a limiting plate, a limiting block, a connecting head and a resisting spring. The limiting block is connected to the machine body. The sliding column is slidably fitted on the limiting block. Three connecting heads are connected to the sliding column. The resisting spring is sleeved on the sliding column and is located between the limiting block and the connecting head. One end of the limiting plate is connected to the lifting platform, and the sliding column passes through the other end of the limiting plate.

[0023] By adopting the above technical solution, when the lifting platform moves beyond the limit, the components on the machine body may be damaged due to impact. Therefore, it is necessary to limit the moving stroke of the lifting platform. When limiting the movement of the lifting platform, the lifting platform moves, driving the limiting plate to move until it abuts against the connecting head, causing the sliding column to move and the resisting spring to be compressed. The operator utilizes the cooperation of the resisting spring, the connecting head, the sliding column and the limiting block to limit the moving stroke of the lifting platform to a certain extent and reduce the possibility of damage to the components on the machine body.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. When measuring the tension, the staff puts the clip at the end of the rubber sheet into the placement slot, then flattens the rubber sheet and limits it with the limiting component, then starts the controller to move the lifting platform to pull the rubber sheet until the end of the rubber sheet is detached from the clip. At this time, the value displayed on the controller is the limit tension of the clip detaching from the rubber sheet, achieving the effect of measuring the tension test of the rubber sheet detaching from the clip. The staff uses the adjustment component to adjust the position of the mobile clamp block to adjust the distance between the mobile clamp block and the fixed clamp block. When the rubber sheet is detached from the clip, the clip stays in the placement slot and can be easily removed, reducing the difficulty of operating the tension test device. At the same time, by adjusting the size of the placement slot, it can also adapt to clips of various sizes and specifications, improving the applicability of the tension test device;

[0026] 2. When adjusting the position of the movable clamping block, the staff pushes the pulling column to make the locking block enter the second movable block, and then moves the pulling column to drive the second movable block to move. After the movable clamping block moves to the specified position, the staff moves the pulling column in the opposite direction to make the locking block move and plug into the locking groove, thereby limiting the movement of the second movable block and achieving the effect of adjusting the position of the movable clamping block;

[0027] 3. When limiting the rubber cloth, the staff pulls the toggle column to make the connecting gear contact the retaining frame, and at the same time the connecting gear disengages from the tooth groove, and then the toggle column can be rotated to drive the second clamping plate to move until the second clamping plate is pressed against the rubber cloth, and then the toggle column is pushed to insert the connecting gear into the tooth groove, thereby limiting the movement of the second clamping plate and achieving the effect of limiting the rubber cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of a metal block and a leather cloth in the prior art.

[0029] Figure 2 It is a schematic diagram of the overall structure of the tensile testing device in Example 1 of the present application.

[0030] Figure 3 It is an exploded view used to illustrate the structure of the clamping assembly in Example 1 of the present application.

[0031] Figure 4 It is a cross-sectional view used to reflect the structure of the adjustment component in Example 1 of the present application.

[0032] Figure 5 It is an exploded view used to reflect the structure of the restriction component in Example 1 of the present application.

[0033] Figure 6 It is a schematic diagram of the structure of the clamping block in Example 2 of the present application.

[0034] Figure 7 It is an exploded view used to illustrate the structure of the adjustment component in Example 2 of the present application.

[0035] Explanation of reference numerals: 01, rubber cloth; 02, clip; 03, metal block; 1, machine body; 11, tension sensor; 12, controller; 13, lifting platform; 2, clamping block; 21, fixed clamping block; 22, movable clamping block; 3, clamping assembly; 31, first fixed frame; 311, first connecting plate; 3111, positioning block; 312, second connecting plate; 313, limiting column; 314, locking nut; 32, first clamping plate; 33, clamping screw Rod; 4, adjustment assembly; 41, adjustment screw; 42, first moving block; 43, second moving block; 44, pulling column; 45, locking block; 5, limiting assembly; 51, second fixed frame; 511, blocking frame; 512, moving seat; 52, second clamping plate; 53, toggle column; 54, connecting gear; 55, fixed rack; 6, travel limit assembly; 61, sliding column; 62, limit plate; 63, limit block; 64, connecting head; 65, resistance spring. DETAILED DESCRIPTION

[0036] The following is combined with Figures 2 - 7 This application is described in further detail.

[0037] Embodiment 1 of the present application discloses an adjustable rubber blanket unclamping tension test device. Figure 1 The adjustable rubber cloth unclamping tension testing device comprises a body 1 , on which a tension sensor 11 and a controller 12 are mounted, and the tension sensor 11 is electrically connected to the controller 12 .

[0038] Reference Figure 1 and Figure 2 The bottom end of the tension sensor 11 is provided with a clamping block 2 and a clamping assembly 3, and the clamping assembly 3 includes a first fixing frame 31, a first clamping plate 32 and a clamping screw 33. The first fixing frame 31 includes a first connecting plate 311, a second connecting plate 312, a limiting column 313 and a locking nut 314. The first connecting plate 311 is fixedly connected to the bottom end of the tension sensor 11, and two limiting columns 313 are fixedly connected on the first connecting plate 311. The limiting column 313 is perpendicular to the first connecting plate 311, and an installation step is provided at the end of the limiting column 313 away from the first connecting plate 311. The second connecting plate 312 is sleeved on the limiting column 313 and abuts against the installation step. The locking nut 314 is threadedly engaged with the end of the limiting column 313 and abuts against the second connecting plate 312. The first clamping plate 32 is sleeved between the two limiting columns 313. The clamping screw 33 is threadedly engaged with the second connecting plate 312 and is rotatably connected to the first clamping plate 32.

[0039] Reference Figure 2 and Figure 3The clamping block 2 is located between the first clamping plate 32 and the first connecting plate 311. A fixed clamping block 21 and a movable clamping block 22 are provided on the clamping block 2. A placement groove is opened between the fixed clamping block 21 and the movable clamping block 22, and a placement step is provided on the placement groove.

[0040] Reference Figure 3 and Figure 4 The clamping block 2 is provided with an adjustment assembly 4, which includes an adjustment screw 41 and a first moving block 42. The clamping block 2 is provided with a first moving groove, the first moving block 42 is slidably fitted in the first moving groove, and is fixedly connected to the moving clamping block 22. The adjustment screw 41 is threadedly fitted on the clamping block 2, and is rotatably connected to the first moving block 42.

[0041] When installing the clamping block 2, the staff places the clamping block 2 between the first connecting plate 311 and the first clamping plate 32, and then rotates the clamping screw 33 to move the first clamping plate 32 until the clamping block 2 is clamped between the first clamping plate 32 and the first connecting plate 311, thereby achieving the effect of installing the clamping block 2.

[0042] Reference Figure 1 and Figure 2 In order to make the clamp 02 at the end of the rubber blanket 01 bear force evenly, two positioning blocks 3111 are fixedly connected to the first connecting plate 311. The thickness of the positioning blocks 3111 is less than that of the clamping block 2. The clamping block 2 is located between the two positioning blocks 3111. The positioning blocks 3111 are used to limit the position and angle of the clamping block 2 so that the clamp 02 can fit the step horizontally.

[0043] Reference Figure 1 and Figure 5 The machine body 1 is vertically slidably matched with a lifting platform 13, and the machine body 1 is built with a driving device, which is used to drive the lifting platform 13 to move up and down, and the driving device is electrically connected to the controller 12. A limiting component 5 is provided on the lifting platform 13, and the limiting component 5 includes a second fixing frame 51, a second clamping plate 52, a toggle column 53, a connecting gear 54 and a fixed rack 55. The structure of the second fixing frame 51 is consistent with that of the first fixing frame 31. The second fixing frame 51 is fixedly connected to the lifting platform 13 and is located directly below the clamping block 2.

[0044] Reference Figure 1 and Figure 5, the second clamping plate 52 is slidably fitted on the second fixed frame 51. The second fixed frame 51 is fixedly connected with a blocking frame 511, and a moving seat 512 is slidably fitted on the blocking frame 511. The toggle column 53 is slidably fitted on the moving seat 512. The connecting gear 54 is fixedly connected to the toggle column 53, one end of the toggle column 53 is fixedly connected with a hand wheel, and the other end is plugged and fitted on the end of the second clamping plate 52. The end of the second clamping plate 52 is provided with a tooth groove matching the shape of the connecting gear 54. The fixed rack 55 is fixedly connected to the second fixed frame 51 and meshes with the connecting gear 54. The thickness of the connecting gear 54 is greater than the thickness of the fixed rack 55.

[0045] When limiting the rubber cloth 01, the staff pulls the toggle column 53 to move the connecting gear 54 and disengage from the tooth groove. The connecting gear 54 contacts the retaining frame 511, and then rotates the toggle column 53 to move the second clamping plate 52 until the second clamping plate 52 is pressed against the rubber cloth 01. Then, the toggle column 53 is pushed to make the connecting gear 54 enter the tooth groove, thereby limiting the movement of the second clamping plate 52 and achieving the effect of limiting the rubber cloth 01.

[0046] Reference Figure 1 In order to reduce the possibility of damage to parts on the machine body 1, a limit-range assembly 6 is provided on the machine body 1, and the limit-range assembly 6 includes a sliding column 61, a limit plate 62, a limit block 63, a connector 64 and a resistance spring 65. The limit block 63 is connected to the frame by bolts, the sliding column 61 is slidably fitted on the limit block 63, and the connector 64 is fixedly connected to three of the sliding columns 61, and the limit block 63 is located between two of the limit heads. The resistance spring 65 is sleeved on the sliding column 61 and is located between the connector 64 and the limit block 63. The limit plate 62 is an L-plate, one end of which is connected to the lifting platform 13 by bolts, and the other end is slidably fitted with the sliding column 61.

[0047] The staff uses the cooperation of the limit block 63 and the limit head to limit the moving stroke of the lifting platform 13, thereby reducing the possibility of damage caused by collision between components when the lifting platform 13 moves beyond the stroke.

[0048] The implementation principle of an adjustable rubber blanket unclamping tension test device in Example 1 of the present application is as follows: when measuring the tension, the staff places the clip 02 in the placement groove, uses the placement step to abut the bottom wall of the clip 02, then straightens the rubber blanket 01, pulls the toggle column 53, moves the connecting gear 54 and disengages from the tooth groove, and the connecting gear 54 abuts against the blocking frame 511, then rotates the toggle column 53 to move the second clamping plate 52 until the second clamping plate 52 is pressed against the rubber blanket 01, then pushes the toggle column 53 to make the connecting gear 54 enter the tooth groove to clamp the rubber blanket 01, and then starts the driving device through the controller 12 to lower the lifting platform 13 to subject the rubber blanket 01 to force until the end of the rubber blanket 01 is released from the clip 02. At this time, the value on the controller 12 is the limit value of the rubber blanket 01 being released from the clip 02, thereby achieving the effect of measuring the unclamping tension of the rubber blanket 01.

[0049] The staff uses the adjustment component 4 to adjust the position of the movable clamp 22 to adjust the distance between the movable clamp 22 and the fixed clamp 21. When the rubber cloth 01 is separated from the clip 02, the clip 02 remains in the placement groove and can be easily taken out, which reduces the difficulty of operating the tensile testing device. At the same time, by adjusting the size of the placement groove, it can also adapt to clips 02 of various sizes and specifications, thereby improving the applicability of the tensile testing device.

[0050] Embodiment 2: The difference between this embodiment and embodiment 1 is that the structure of the adjustment component 4 is different.

[0051] Reference Figure 6 and Figure 7 The adjustment assembly 4 includes a second moving block 43, a pulling column 44 and a locking block 45. A second moving groove is provided on the clamping block 2, and the second moving block 43 is slidably fitted in the second moving groove and is fixedly connected to the moving clamping block 22. The pulling column 44 is a rectangular column, and one pulling column 44 is plugged and fitted at both ends of the second moving block 43, and the locking block 45 is fixedly connected to the pulling column 44. A plurality of locking grooves matching the shape of the locking block 45 are provided on both sides of the second moving groove.

[0052] When adjusting the position of the movable clamping block 22, the staff pushes the pulling column 44 to make the locking block 45 enter the second movable block 43, and then pushes the second movable block 43 until the movable clamping block 22 is moved to the specified position, and then pulls out the pulling column 44 to make the locking block 45 plug and fit into the locking groove, thereby limiting the movement of the movable clamping block 22 and achieving the effect of adjusting the position of the movable clamping block 22.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An adjustable rubber blanket unclamping tension test device, characterized in that: The invention comprises a machine body (1), a controller (12) being installed on the machine body (1), a lifting platform (13) being arranged on the machine body (1), a driving device for driving the lifting platform (13) to move being built in the machine body (1), a tension sensor (11) being installed on the machine body (1), the tension sensor (11) and the driving device being electrically connected to the controller (12), a clamping block (2) and a clamping component (3) for clamping the clamping block (2) being arranged at the end of the tension sensor (11), a fixed clamping block (21) and a movable clamping block (22) being arranged on the clamping block (2), a placement groove being provided between the fixed clamping block (21) and the movable clamping block (22), a placement step being provided on the placement groove, an adjusting component (4) for adjusting the position of the movable clamping block (22) being provided on the clamping block (2), and a limiting component (5) for limiting the other end of the rubber cloth (01) being provided on the lifting platform (13).

2. The adjustable rubber blanket unclamping tensile test device according to claim 1, characterized in that: The adjusting assembly (4) comprises an adjusting screw (41) and a first movable block (42); a first movable groove is formed on the clamping block (2); the first movable block (42) is slidably fitted in the first movable groove and is connected to the movable clamping block (22); the adjusting screw (41) is horizontally rotatably connected to the clamping block (2); the adjusting screw (41) passes through the first movable block (42) and is threadedly fitted with the first movable block (42).

3. The adjustable rubber blanket unclamping tensile test device according to claim 1, characterized in that: The adjustment assembly (4) comprises a second movable block (43), a pulling column (44) and a locking block (45). A second movable groove is opened on the clamping block (2). The second movable block (43) is slidably fitted in the second movable groove and is connected to the movable clamping block (22). The pulling column (44) is a rectangular column. One pulling column (44) is plugged into and fitted at both ends of the second movable block (43). The locking block (45) is connected to a plurality of blocks on the pulling column (44). A plurality of locking grooves are opened on both sides of the movable groove. When the position of the movable clamping block (22) is limited, the locking block (45) is plugged into and fitted in the locking groove.

4. The adjustable rubber blanket unclamping tension test device according to claim 1, characterized in that: The clamping assembly (3) includes a first fixing frame (31), a first clamping plate (32) and a clamping screw (33); the first fixing frame (31) is installed at the end of the tension sensor (11); the first clamping plate (32) is slidably fitted on the first fixing frame (31); the clamping screw (33) is threadedly fitted on the first fixing frame (31) and is rotatably connected to the first clamping plate (32); the clamping block (2) is located between the first clamping plate (32) and the first fixing frame (31).

5. The adjustable rubber blanket unclamping tensile test device according to claim 4, characterized in that: The first fixing frame (31) includes a first connecting plate (311), a second connecting plate (312), a limiting column (313) and a locking nut (314). The first connecting plate (311) is connected to the end of the tension sensor (11). Several limiting columns (313) are connected to the first connecting plate (311). The limiting columns (313) are perpendicular to the first connecting plate (311). The end of the limiting column (313) is provided with a mounting step. The second connecting plate (312) is inserted into the mounting step. The locking nut (314) is threadedly engaged with the end of the limiting column (313) and contacts the first connecting plate (311). The clamping screw (33) is threadedly engaged with the second connecting plate (312). The clamping block (2) is located between the first clamping plate (32) and the first connecting plate (311).

6. The adjustable rubber blanket unclamping tension test device according to claim 5, characterized in that: Two positioning blocks (3111) are connected to the first connecting plate (311); the thickness of the positioning blocks (3111) is smaller than the thickness of the clamping block (2); when the clamping block (2) is clamped, the clamping block (2) is located between the two positioning blocks (3111).

7. The adjustable rubber blanket unclamping tension test device according to claim 1, characterized in that: The limiting assembly (5) comprises a second fixed frame (51), a second clamping plate (52), a toggle column (53), a connecting gear (54) and a fixed rack (55); the second fixed frame (51) is mounted on the lifting platform (13); the second clamping plate (52) is slidably fitted on the second fixed frame (51); the second fixed frame (51) is connected to a blocking frame (511); the blocking frame (511) is slidably fitted with a moving seat (512); the toggle column (53) is slidably fitted on the moving seat (512); the connecting gear ( 54) is connected to the toggle column (53), the fixed rack (55) is connected to the second fixed frame (51) and meshes with the connecting gear (54), the thickness of the connecting gear (54) is greater than the thickness of the fixed rack (55), and a tooth groove is formed at the end of the second clamping plate (52). When moving, the connecting gear (54) contacts the blocking frame (511) and disengages from the tooth groove. The end of the toggle column (53) is located in the second clamping plate (52). When locked, the connecting gear (54) is partially located in the tooth groove.

8. The adjustable rubber blanket unclamping tension test device according to claim 1, characterized in that: A limited-range component (6) is provided on the machine body (1), and the limited-range component (6) comprises a sliding column (61), a limiting plate (62), a limiting block (63), a connecting head (64) and a resisting spring (65). The limiting block (63) is connected to the machine body (1), the sliding column (61) is slidably fitted on the limiting block (63), three connecting heads (64) are connected to the sliding column (61), the resisting spring (65) is sleeved on the sliding column (61) and is located between the limiting block (63) and the connecting head (64), one end of the limiting plate (62) is connected to the lifting platform (13), and the sliding column (61) passes through the other end of the limiting plate (62).

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