Metal watchband tension detection device

Abstract

The invention relates to the technical field of tension detection, in particular to a metal watchband tension detection device. Comprising a numerical control table, an electric guide rail is arranged on the upper side of the numerical control table, a cross beam is installed on a sliding block of the electric guide rail, the cross beam is fixedly connected with a tension sensor, the tension sensor and the numerical control table are fixedly connected with fixing frames, the fixing frames are fixedly connected with a clamp body, and the clamp body is fixedly connected with rectangular frames which are symmetrically distributed. The symmetrically-distributed rectangular frames are jointly and rotationally connected with a missing gear and slidably connected with a rack frame, the rack frame is fixedly connected with a T-shaped frame, and the T-shaped frame is slidably connected with symmetrically-distributed sliding frames. By adopting a fixing mode that the four surfaces of the metal watchband are clamped and the clamping blocks are combined by using an elastic hard material, the clamping force of the clamping blocks on the metal watchband is enhanced, meanwhile, the metal watchband is in a vertical state through clamping of the sliding frame, dispersion of pulling force is avoided, and the accuracy of a detection result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tension detection, and in particular to a tension detection device for a metal watch strap. Background Art

[0002] Metal watch straps are a common type of watch straps, which are corrosion-resistant, durable and beautiful in appearance. They are usually made of stainless steel, titanium alloy and other metal materials. In order to detect the quality of metal watch straps, a tensile testing device is needed to test the tensile mechanical properties of the metal watch straps. The tensile testing device is composed of a main frame, a loading system, a clamp, a measurement system and a control system. The results measured by the tensile testing device help researchers evaluate the quality of the metal watch strap. However, when the existing tensile testing device clamps the metal watch strap, it usually only fixes the two sides of the upper and lower ends of the metal watch strap. In this way, the metal strap will not be in a vertical state after being fixed, resulting in uneven force on the links of the metal strap during subsequent stretching, affecting the final detected data. The clamp is made of metal, and the friction coefficient between the clamp and the metal strap is small. When the clamp is used to clamp the metal strap, if the clamping force is small, the metal strap will slip during the tension test, resulting in failure of the tension test. If the clamping force is large, the clamped part of the metal strap will be deformed, causing the pin to be squeezed and deformed, reducing its tensile resistance, making this part more likely to be broken, affecting the final detected data. Summary of the invention

[0003] In order to overcome the shortcoming that the existing tension detection device cannot effectively clamp the metal watch strap, the present invention provides a metal watch strap tension detection device.

[0004] The technical implementation scheme of the present invention is: a metal watchband tension detection device, including a numerical control table, an electric guide rail is arranged on the upper side of the numerical control table, a crossbeam is installed on the slider of the electric guide rail, a tension sensor is fixedly connected to the crossbeam, the tension sensor and the numerical control table are both fixedly connected to a fixed frame, the two fixed frames are symmetrically distributed, the opposite sides of the two fixed frames are fixedly connected to a clamping body, the clamping body is fixedly connected to a symmetrically distributed rectangular frame, the symmetrically distributed rectangular frames are jointly connected to a missing gear for rotation and a rack frame for sliding connection, the missing gear The wheel is equipped with a handle, and the clamp body is slidably connected with a symmetrically distributed clamping block, and the clamping block is squeezed and matched with the adjacent rack frame, and the opposite sides of the symmetrically distributed rack frame are fixed with a T-shaped frame, and the opposite sides of the two symmetrically distributed T-shaped frames are slidably connected with a symmetrically distributed sliding frame, and the sliding frame is made of elastic material, and the clamping block is squeezed and matched with the adjacent and symmetrically distributed sliding frames, and a tension spring is arranged between the sliding frame and the adjacent T-shaped frame, and the symmetrically distributed sliding frames are commonly provided with a positioning component for assisting in fixing the watch strap.

[0005] Preferably, the facing sides of the adjacent and symmetrically distributed clamping blocks are both provided with trapezoidal blocks, and the widths of the facing sides of the symmetrically distributed trapezoidal blocks are smaller than the sum of the lengths of two adjacent sliding frames.

[0006] Preferably, the positioning assembly includes symmetrically distributed rectangular slide rails, and the symmetrically distributed rectangular slide rails are respectively fixed to the upper sides of adjacent sliding frames, one of the rectangular slide rails is slidably connected to a first L-shaped frame, and the other rectangular slide rail is slidably connected to a second L-shaped frame, a first spring is fixed between the first L-shaped frame and the adjacent rectangular slide rail, and between the second L-shaped frame and the adjacent rectangular slide rail, the first L-shaped frame is fixed to a first slide bar, the first slide bar is slidably matched with the adjacent sliding frame, the second L-shaped frame is fixed to a second slide bar, the second slide bar is slidably matched with the adjacent sliding frame, the first L-shaped frame and the second L-shaped frame are both fixed to a U-shaped plate, the U-shaped plate is provided with a groove, and the sliding frame is provided with an adsorption assembly for assisting in fixing the watch strap.

[0007] Preferably, the width of the U-shaped plate groove gradually decreases from the opening direction to the closing direction, and the minimum width of the groove is smaller than the minimum width of the sliding frame.

[0008] Preferably, the inner side surface of the U-shaped plate is set to a smooth material to reduce the friction generated on the surface of the strap.

[0009] Preferably, there is a gap between the projection of the U-shaped plate in the horizontal direction and the projection of the corresponding sliding frame in the horizontal direction.

[0010] Preferably, the adsorption component includes a plurality of rubber rings, the rubber rings are fixedly connected to the adjacent sliding frames, the sliding frames are provided with a plurality of V-shaped rubber strips evenly distributed in a straight line, the sliding frames are provided with through holes having the same number as the rubber rings thereon, the rubber rings are connected with adjacent through holes on the adjacent sliding frames, one of the symmetrically distributed clamping blocks is slidably connected with a baffle plate, and the other is slidably connected with a rectangular plate, the baffle plate is slidably matched with the rectangular plate, a second spring is fixedly connected between the baffle plate and the rectangular plate, and the baffle plate is sealed and matched with the evenly distributed through holes on the adjacent sliding frames.

[0011] Preferably, the thickness of the rubber ring is the same as the thickness of the V-shaped rubber strip.

[0012] Preferably, the symmetrically distributed rectangular frames are fixedly connected to a third spring on one side close to the adjacent T-shaped frame, the symmetrically distributed third springs are commonly fixedly connected to an extrusion plate on one end close to the adjacent T-shaped frame, and the symmetrically distributed clamping blocks are extrusion-matched with the adjacent extrusion plates.

[0013] Preferably, it also includes a symmetrically distributed locking assembly, which is arranged on one side of the adjacent clamping body close to the adjacent T-shaped frame, and the locking assembly is used to lock the adjacent and symmetrically distributed clamping blocks, and the locking assembly includes two hydraulic telescopic rods, and the two hydraulic telescopic rods are fixedly connected to the inner side of the adjacent clamping body, the telescopic part of the hydraulic telescopic rod is slidably connected to the adjacent clamping block, and two oil storage shells are fixedly connected to the inner side of the clamping body, and the fixed part of the hydraulic telescopic rod is connected to the adjacent oil storage shell through a first pipe and a second pipe, a one-way valve is provided on the first pipe, and a pressure relief valve is provided on the second pipe.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention adopts a fixing method in which the four sides of the metal watchband are clamped and the clamping block is fixed with a combination of elastic and hard materials, thereby enhancing the clamping force of the clamping block on the metal watchband, and the sliding frame will not cause damage to the metal watchband when clamping the metal watchband. At the same time, the metal watchband is clamped in a vertical state by the clamping of the sliding frame, thereby avoiding the dispersion of tension and improving the accuracy of the detection result.

[0015] 2. When placing a metal watchband, the present invention uses a U-shaped plate to pre-limit the metal watchband, correct the deviation of the metal watchband, and an auxiliary sliding frame clamps the metal watchband to keep the metal watchband in a vertical state, thereby ensuring the accuracy of the detection result.

[0016] 3. The present invention provides a through hole on the soft sliding frame so that when the clamping block becomes loose due to insufficient clamping force or other reasons, the through hole can adsorb the metal strap, thereby ensuring the clamping effect of the metal strap and avoiding affecting the detection result.

[0017] 4. The present invention prevents the buckle of the metal watchband from being pulled open during the stretching process by locking the position of the clamp block, causing the clamp block to move in the opposite direction of the stretching direction under the action of the metal restoring force, thereby loosening the clamping of the metal watchband and affecting the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the fixing frame and the clamping body of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the clamp block and the T-shaped frame of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the rectangular slide rail and the first spring of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the sliding frame and the rectangular plate of the present invention; Figure 6It is a schematic diagram of the three-dimensional structure of the first L-shaped frame and the second L-shaped frame of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the U-shaped plate and the second L-shaped frame of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the shielding plate and the rectangular plate of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the present invention without the gear and the extrusion plate; Fig.10 It is a three-dimensional structural schematic diagram of the hydraulic telescopic rod and the oil storage shell of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the first pipeline and the second pipeline of the present invention.

[0019] Markings in the accompanying drawings: 1: CNC table, 2: electric guide rail, 3: tension sensor, 4: fixed frame, 5: clamp body, 6: rectangular frame, 7: missing gear, 8: handle, 9: rack frame, 10: clamp block, 11: T-shaped frame, 12: sliding frame, 13: tension spring, 1101: rectangular slide rail, 1102: first L-shaped frame, 1103: first spring, 1104: first slide bar, 1105: U-shaped plate, 1106: second L-shaped frame, 1107: second slide bar, 1201: rubber ring, 1202: baffle plate, 1203: rectangular plate, 1204: second spring, 1301: third spring, 1302: extrusion plate, 1401: hydraulic telescopic rod, 1402: oil storage shell, 1403: first pipeline, 1404: one-way valve, 1405: second pipeline, 1406: pressure relief valve. DETAILED DESCRIPTION

[0020] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0021] In the existing testing of the tensile mechanical properties of metal watch straps, it is difficult to control the degree of clamping of the metal watch strap by the clamp block, which may cause the metal watch strap to slip out of the clamp block during the test or cause the fixed part of the metal watch strap to deform, resulting in the final test failure or inaccurate detected values. In addition, the metal watch strap may not be in a vertical state when placed, causing uneven force on the links of the metal watch strap, affecting the detected values.

[0022] Embodiment 1: A metal strap tension detection device, such as Figure 1-Figure 3As shown, it includes a numerical control table 1, an electric guide rail 2 is arranged on the upper side of the numerical control table 1, a crossbeam is installed on the slider of the electric guide rail 2, a tension sensor 3 is fixedly connected to the crossbeam, the tension sensor 3 is used to detect the tension value borne by the metal strap, a fixing frame 4 is fixedly connected to the lower side of the tension sensor 3 and the upper side of the numerical control table 1, the two fixing frames 4 are symmetrically distributed up and down, the opposite sides of the two fixing frames 4 are fixedly connected to a clamping body 5, the middle part of the clamping body 5 is fixedly connected to two rectangular frames 6 symmetrically distributed on the left and right, a missing gear 7 is rotatably connected between the two rectangular frames 6 symmetrically distributed on the left and right, a grip 8 is installed on the missing gear 7, a rack frame 9 is slidably connected between the two rectangular frames 6 symmetrically distributed on the left and right, the missing gear 7 is meshed with the adjacent rack frame 9 to make the rack frame 9 reciprocate, the rotation position of the missing gear 7 and the adjacent rectangular frame 6 is located at the center of the missing gear 7, the missing gear 7 is used to drive the adjacent rack frame 9 to reciprocate stably, the clamping body 5 is slidably connected to two clamping blocks 10 symmetrically distributed on the left and right, Figure 3 Taking the clamp body 5 as an example, the center lines of the two clamping blocks 10 coincide with the adjacent clamping bodies 5, a trapezoidal groove is provided in the clamping body 5, the two adjacent clamping blocks 10 are located in the trapezoidal grooves in the adjacent clamping bodies 5, the handle 8 is used to adjust the squeezing force of the two clamping blocks 10, the adjacent and symmetrically distributed clamping blocks 10 are provided with trapezoidal blocks on the opposite sides, the width of the symmetrically distributed trapezoidal blocks on the opposite sides is less than the sum of the lengths of the two adjacent sliding frames 12, and is used to provide deformation space for the two adjacent sliding frames 12, a rectangular notch is provided at the lower part of the clamping block 10, the two symmetrically distributed clamping blocks 10 are squeezed and matched with the adjacent rack frame 9 through the rectangular notch, the rack frame 9 is fixedly connected to a T-shaped frame 11 on the side away from the adjacent fixed frame 4, and the T-shaped frame 11 has a front The rectangular slide grooves are symmetrically distributed at the back and front of the T-shaped frame 11, and the rectangular slide grooves are symmetrically distributed at the front and back of the T-shaped frame 11 are both slidably connected with a sliding frame 12. The trapezoidal blocks of the two clamping blocks 10 are squeezed and matched with the two adjacent sliding frames 12. The sliding frame 12 is made of elastic material. The sliding frame 12 can be deformed when it is squeezed by the trapezoidal blocks of the two adjacent clamping blocks 10. A rectangular slide groove is provided on the side of the sliding frame 12 away from the adjacent T-shaped frame 11, and a tension spring 13 is arranged between the sliding frame 12 and the adjacent T-shaped frame 11. When the metal watchband is not clamped, the tension spring 13 is not stretched. When the two sliding frames 12 move toward each other, the adjacent tension springs 13 are stretched respectively. A positioning component for centering the watchband is commonly provided on the two sliding frames 12 symmetrically distributed at the front and back.

[0023] like Figure 4-Figure 7As shown, the positioning assembly includes two rectangular slide rails 1101 symmetrically distributed front to back, and the two rectangular slide rails 1101 are respectively fixed to the upper sides of adjacent sliding frames 12, wherein the front rectangular slide rail 1101 is slidably connected to the first L-shaped frame 1102, and the rear rectangular slide rail 1101 is slidably connected to the second L-shaped frame 1106. The first L-shaped frame 1102 and the second L-shaped frame 1106 have different heights, and the specific heights are adjusted according to actual conditions. In this article, the vertical height of the first L-shaped frame 1102 is less than the vertical height of the second L-shaped frame 1106. The horizontal parts of the first L-shaped frame 1102 and the second L-shaped frame 1106 extend toward each other and have the same length of the horizontal parts. There is a gap between the first L-shaped frame 1102 and the adjacent rectangular slide rail 1101, and a gap between the first L-shaped frame 1106 and the adjacent rectangular A first spring 1103 is fixedly connected between the shaped slide rails 1101, a first slide bar 1104 is fixedly connected to the lower side of the cross bar of the first L-shaped frame 1102, the first slide bar 1104 slides in cooperation with the rectangular slide groove on the upper side of the adjacent slide frame 12, a second slide bar 1107 is fixedly connected to the lower side of the cross bar of the second L-shaped frame 1106, the height of the second slide bar 1107 is greater than the height of the first slide bar 1104, the second slide bar 1107 slides in cooperation with the rectangular slide groove on the upper side of the adjacent slide frame 12, the rectangular slide groove of the slide frame 12 is deformed when being squeezed by two adjacent clamping blocks 10, and is used to fix the adjacent first slide bar 1104 or the adjacent second slide bar 1107 respectively, the rear side surface of the first L-shaped frame 1102 and the front side surface of the second L-shaped frame 1106 are both fixedly connected to a U-shaped plate 1105, and the U-shaped plate 1105 is provided with a groove, The width of the groove of the U-shaped plate 1105 gradually decreases from the opening direction to the closing direction, and the minimum width of the groove is smaller than the minimum width of the sliding frame 12, so that the metal strap can be squeezed and centered by the inner side of the U-shaped plate 1105. The inner side of the U-shaped plate 1105 is set to a smooth material to reduce the friction generated on the surface of the metal strap. There is a gap between the projection of the U-shaped plate 1105 in the horizontal direction and the projection of the corresponding sliding frame 12 in the horizontal direction. When clamping the strap, the U-shaped plate 1105 first contacts the metal strap and makes the metal strap in a vertical and centered state. The sliding frame 12 is provided with an adsorption component for assisting in fixing the strap.

[0024] like Figure 7 and Figure 8As shown, the adsorption component includes a plurality of rubber rings 1201. In the present invention, the number of the plurality of rubber rings 1201 is three. The three rubber rings 1201 are fixedly connected to adjacent sliding frames 12. A plurality of V-shaped rubber strips evenly distributed in a straight line are arranged on the side of the two sliding frames 12 close to each other. When the metal watchband is clamped, the V-shaped rubber strip is tightly fitted with the surface of the metal band. The thickness of the rubber ring 1201 is the same as that of the V-shaped rubber strip, which is used to ensure that the rubber ring 1201 is tightly fitted with the surface of the metal band. Three through holes are opened on the sliding frame 12. The rubber ring 1201 is connected to the adjacent through holes on the adjacent sliding frame 12. The inner diameter of the rubber ring 1201 is the same as the inner diameter of the through hole. One of the two clamping blocks 10 is slidably connected There is a baffle plate 1202, which is sealed and matched with the through holes uniformly distributed in a straight line on the adjacent sliding frame 12. Rectangular notches are set on the front and rear sides of the baffle plate 1202, which is used to allow the gas to flow out through the rectangular notches when the two clamping blocks 10 just start to squeeze the two adjacent sliding frames 12. The side of the baffle plate 1202 close to the adjacent sliding frame 12 is made of elastic material, which is used to allow the gas to squeeze the rear side of the baffle plate 1202 after the through holes of the sliding frame 12 are blocked, so that the baffle plate 1202 is deformed and the gas is discharged. The other sliding connection is with a rectangular plate 1203, the middle part of the baffle plate 1202 is slidably matched with the rectangular plate 1203, and a second spring 1204 is fixedly connected between the baffle plate 1202 and the rectangular plate 1203.

[0025] like Fig. 9 As shown, two rectangular frames 6 symmetrically distributed on the left and right are fixedly connected to one side close to the adjacent T-shaped frame 11 with a third spring 1301, and the third spring 1301 is initially in a compressed state. One end of the two third springs 1301 close to the adjacent T-shaped frame 11 is commonly fixedly connected to an extrusion plate 1302, and a circular hole larger than the diameter of the rack frame 9 is opened in the middle of the extrusion plate 1302 to avoid affecting the sliding of the rack frame 9, and the symmetrically distributed clamping blocks 10 are all extruded and matched with the adjacent extrusion plates 1302.

[0026] When the device is needed to perform tension testing on a metal watch strap, the staff first starts the CNC table 1 and electrically connects the CNC table 1 to an external computer device. First, one end of the watch strap is fixed using the upper fixing frame 4 and its attached parts. The staff first drags the upper front sliding frame 12 forward. The sliding frame 12 moves forward so that the adjacent tension spring 13 is stretched. The front sliding frame 12 moves forward, driving the adjacent rectangular slide rail 1101 and the adjacent shielding plate 1202 to move forward. The shielding plate 1202 moves forward, driving the adjacent rectangular plate 1203 and the adjacent second spring 1204 to move forward. The rectangular slide The rail 1101 moves forward and drives the first L-shaped frame 1102 to move forward through the adjacent first spring 1103. The first L-shaped frame 1102 moves forward and drives the adjacent U-shaped plate 1105 to move forward. When the distance between the two upper front and rear U-shaped plates 1105 is large enough to put the watch strap in, one end of the metal watch strap is placed between the two upper U-shaped plates 1105. Then, the upper front sliding frame 12 is released. The front sliding frame 12 moves backward under the drive of the adjacent tension spring 13. The front sliding frame 12 moves backward and drives the front rectangular sliding rail 1101 to move backward. The rectangular sliding rail 1101 moves backward. The first L-shaped frame 1102 is driven to move backwards through the adjacent first spring 1103, and the first L-shaped frame 1102 moves backwards and drives the adjacent U-shaped plate 1105 to move backwards. During the movement of the U-shaped plate 1105 backwards, it contacts and squeezes the metal watchband. The metal watchband is squeezed and moves backwards to contact the U-shaped plate 1105 at the rear side. The two adjacent U-shaped plates 1105 move in the same direction under the action of the elastic force of the adjacent compressed first springs 1103, and the position of the metal watchband is adjusted to keep it in the center state. Then, the upper front side sliding frame 12 continues to move backwards driven by the adjacent tension spring 13. The front side of the metal watch strap is squeezed, and after being squeezed, the metal watch strap squeezes the sliding frame 12 on the rear side. The V-shaped rubber strips and rubber rings 1201 on the front and rear sliding frames 12 are squeezed and deformed, among which the six rubber rings 1201 are tightly fitted with the side of the metal watch strap, and the rear sliding frame 12 is squeezed and moves backward. The movement of the rear sliding frame 12 causes the tension spring 13 on the rear side to be stretched. When the front and rear tension springs 13 are in a state of equal elastic force, the front and rear sliding frames 12 stop moving, and the two U-shaped plates 1105 remain centered and stationary under the action of the same elastic force of the two first springs 1103.

[0027] When the two upper front and rear sliding frames 12 stop moving, the staff pulls the upper handle 8 upwards to make the missing gear 7 rotate counterclockwise (taking the left view as an example), the missing gear 7 rotates counterclockwise to drive the rack frame 9 to move downward, the rack frame 9 moves downward to drive the T-shaped frame 11 and the two clamping blocks 10 to move downward, the T-shaped frame 11 moves downward to drive the sliding frame 12 and its attached parts to move downward, when the two clamping blocks 10 move downward to release the squeezing of the squeezing plate 1302, the squeezing plate 1302 moves upward driven by the two third springs 1301, The extrusion plate 1302 is always in contact with the two clamping blocks 10, providing downward support force for the two clamping blocks 10, avoiding the gap between the gear 7 and the rack frame 9 causing the rack frame 9 to move slightly upward, thereby causing the two clamping blocks 10 to move upward. When the two clamping blocks 10 move downward, they move toward each other due to the limit of the clamp body 5, and squeeze and clamp the left and right sides of the metal watchband. The two clamping blocks 10 move toward each other, driving the trapezoidal blocks thereon to gradually contact and squeeze the left and right sides of the two adjacent sliding frames 12, and the sliding frames 12 are squeezed and deformed. The sliding connection between the two sliding frames 12 and the first sliding bar 1104 and the second sliding bar 1107 is squeezed to fix the first sliding bar 1104 and the second sliding bar 1107, and the V-shaped rubber strip and the rubber ring 1201 are more closely fitted to the metal strap. At the same time, the through holes on the two sliding frames 12 are squeezed and deformed, and the gas inside the through holes is squeezed out. The two clamping blocks 10 move toward each other and drive the shielding plate 1202 and the rectangular plate 1203 thereon to move toward each other. The shielding plate 1202 and the adjacent rectangular plate 1203 move toward each other to compress The second spring 1204 between the two and the baffle plate 1202 blocks the through hole on the adjacent sliding frame 12 after moving a distance. When the two clamping blocks 10 continue to squeeze the two adjacent sliding frames 12, the two sliding frames 12 are deformed, causing the gas in the through holes of the two sliding frames 12 to squeeze the adjacent baffle plates 1202. The adjacent baffle plates 1202 are deformed by the squeezing and discharge the gas. The staff judges the clamping degree of the metal watchband according to the feedback force of pulling the handle 8, and stops pulling the handle 8 after the metal watchband is clamped.

[0028] Repeat the above actions and use the lower fixing frame 4 and its attached parts to fix the other end of the metal strap, but the movement directions of the related parts moving up and down are opposite, and the movement directions of the related parts moving in the front, back, left and right directions are the same. After the metal strap is fixed, control the CNC table 1 to start the slider of the electric guide rail 2 to move upward. The upward movement of the slider of the electric guide rail 2 drives the crossbeam upward. The upward movement of the crossbeam drives the tension sensor 3 and its attached parts upward, so that the metal strap is gradually stretched. Finally, the metal strap is broken under the action of tension, and the change in tension value detected by the tension sensor 3 is transmitted to the external computer device.

[0029] When the metal strap is broken, taking the movement of the upper fixed frame 4 and its attached parts as an example, the staff pulls down the upper handle 8, and the handle 8 swings downward to drive the missing gear 7 to rotate clockwise (taking the left view direction as an example), and the missing gear 7 rotates clockwise to drive the rack frame 9 to move upward, and the rack frame 9 moves upward to drive the T-shaped frame 11 and the two clamping blocks 10 to move upward. When the two clamping blocks 10 move upward, they move backwards under the action of the elastic force of the adjacent second spring 1204, and the T-shaped frame 11 moves upward to drive the two sliding frames 12 and the attached parts thereon to move upward.

[0030] When the handle 8 is pulled downward to release the two clamping blocks 10 from squeezing the left and right sides of one end of the broken metal strap, the sliding connection between the first slide bar 1104 and the second slide bar 1107 returns to its original state, and then the staff drags the front sliding frame 12 forward. The sliding frame 12 moves forward, driving the front rectangular slide rail 1101 and the baffle plate 1202 to move forward. The baffle plate 1202 moves forward, driving the rectangular plate 1203 and the second spring 1204 to move forward. The rectangular slide rail 1101 moves forward, driving the first L-shaped frame 1102 forward through the first spring 1103. The first L-shaped frame 1102 moves forward, driving the adjacent U-shaped plate 1105 forward. When the distance between the front and rear sliding frames 12 is sufficient to release the squeezing on the front and rear sides of the upper end of the metal strap, the staff takes the broken metal strap, and then releases the front sliding frame 12 to complete the resetting of the upper fixed frame 4 and its attached parts.

[0031] Repeat the above actions to remove another part of the broken metal strap from the attached parts on the lower fixing frame 4, but the movement directions of the related parts moving up and down are opposite, and the movement directions of the related parts moving in the front, back, left and right directions are the same, completing the reset of the attached parts on the lower fixing frame 4. Then the staff observes the data measured by the computer to complete the tension test of a metal strap.

[0032] When the metal strap is stretched after being clamped, the buckle in the middle of the metal strap will be pulled open, causing the clamp to suddenly lose the tension of the metal strap being stretched and react to itself. Under the action of the metal restoring force, the clamp moves in the opposite direction of the stretching direction and loosens the clamping of the metal strap, affecting the test results.

[0033] Embodiment 2: Based on embodiment 1, Fig.10 and Fig.11As shown, it also includes a locking component that is symmetrically distributed up and down. The locking component is arranged on one side of the trapezoidal groove inside the adjacent clamp body 5 near the adjacent T-shaped frame 11. The locking component is used to lock the adjacent and left-right symmetrically distributed clamping blocks 10 to prevent the clamping blocks 10 from sliding up and down after clamping the metal watchband. The locking component includes two hydraulic telescopic rods 1401 that are symmetrically distributed in the center. The two hydraulic telescopic rods 1401 are both fixedly connected to the middle part of the inner side of the adjacent clamp body 5. The telescopic part of the hydraulic telescopic rod 1401 is slidably connected to the adjacent clamping block 10. The clamping block 10 drives the telescopic end of the adjacent hydraulic telescopic rod 1401 to reciprocate. The middle part of the inner side of the clamp body 5 is fixedly connected with two oil storage shells 1402 that are symmetrically distributed in the center. The fixing part of the hydraulic telescopic rod 1401 is connected through the first pipe 1403. The second pipeline 1405 is connected to the adjacent oil storage shell 1402, the cavities in the fixed parts of the two hydraulic telescopic rods 1401, the two first pipelines 1403 and the two second pipelines 1405 are all filled with hydraulic oil, the first pipeline 1403 is provided with a one-way valve 1404, the one-way valve 1404 is used to allow the hydraulic oil to flow from the fixed parts of the adjacent hydraulic telescopic rods 1401 into the adjacent oil storage shells 1402, the second pipeline 1405 is provided with a pressure relief valve 1406, the pressure relief valve 1406 is used to allow the hydraulic oil to flow from the adjacent oil storage shells 1402 back to the fixed parts of the adjacent hydraulic telescopic rods 1401, the pressure threshold of the pressure relief valve 1406 is greater than the friction force of the metal strap on the clamping block 10 when it is stretched, and is used to prevent the metal strap from driving the clamping block 10 to move when it is stretched.

[0034] When the electric guide rail 2 is started to perform tension testing on the metal strap, the metal strap is gradually straightened under the action of the tension at both ends. After the metal strap is completely straightened, due to the friction of the metal strap itself, the two ends of the metal strap drag the two adjacent clamping blocks 10 to move. Taking the movement of the two upper clamping blocks 10 as an example, the two clamping blocks 10 move downward under the drag of the elastic restoring force. The downward movement of the two clamping blocks 10 respectively drives the telescopic ends of the adjacent hydraulic telescopic rods 1401 to move downward, and squeezes the hydraulic oil in the fixed part of the hydraulic telescopic rod 1401 into the adjacent oil storage shell 1402 through the first pipeline 1403 and the one-way valve 1404 thereon. At the same time, the two clamping blocks 10 are squeezed by the adjacent clamping bodies 5, so that the two clamping blocks 10 move toward each other, further clamping the adjacent metal straps. As the electric guide rail 2 continues to move upward, the situation where the metal strap breaks is divided into two There are two types of situations. One is that the metal watchband breaks before the lock in the middle of the metal watchband is pulled open, and the other is that the metal watchband breaks after the lock in the middle of the metal watchband is pulled open. When the lock in the middle of the metal watchband is pulled open, the tension on the metal watchband is instantly reduced due to the increase in the length of the metal watchband, and the two clamping blocks 10 lose the dragging force. Subsequently, under the action of the elastic restoring force of the adjacent metal watchbands, there is a tendency to move upward, and the two clamping blocks 10 respectively drive the telescopic ends of the adjacent hydraulic telescopic rods 1401 to move upward, but due to the restriction of the pressure relief valve 1406, the hydraulic oil cannot flow from the oil storage shell 1402 through the second pipe 1405 back to the fixed part of the adjacent hydraulic telescopic rod 1401, and can only be reset by the staff turning the handle 8 to prevent the clamping blocks from moving, thereby avoiding the metal watchband lock being suddenly pulled open to affect the clamping degree of the metal watchband.

[0035] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A metal watchband tension detection device, comprising a numerical control table (1), wherein an electric guide rail (2) is arranged on the upper side of the numerical control table (1), a slider of the electric guide rail (2) is installed with a crossbeam, a tension sensor (3) is fixedly connected to the crossbeam, the tension sensor (3) and the numerical control table (1) are both fixedly connected to a fixing frame (4), the two fixing frames (4) are symmetrically distributed, the two fixing frames (4) are fixedly connected to the opposite sides thereof with a clamping body (5), the clamping body (5) is fixedly connected to a symmetrically distributed rectangular frame (6), the symmetrically distributed rectangular frames (6) are rotatably connected to a missing gear (7) and slidably connected to a rack frame (9), the missing gear (7) is installed with a handle (8), the clamping body (5) is slidably connected to a symmetrically distributed clamping block (10), the clamping block (10) is extruded and matched with the adjacent rack frame (9), and the device is characterized in that: It also comprises two symmetrically distributed T-shaped frames (11), the two symmetrically distributed T-shaped frames (11) are respectively fixed to the opposite sides of the symmetrically distributed rack frames (9), the opposite sides of the two symmetrically distributed T-shaped frames (11) are slidably connected to symmetrically distributed sliding frames (12), the sliding frames (12) are made of elastic material, the clamping block (10) and the adjacent and symmetrically distributed sliding frames (12) are squeezed and matched, a tension spring (13) is arranged between the sliding frame (12) and the adjacent T-shaped frame (11), and the symmetrically distributed sliding frames (12) are commonly provided with a positioning component for assisting in fixing the watch strap.

2. A metal watchband tension detection device according to claim 1, characterized in that: The facing sides of the adjacent and symmetrically distributed clamping blocks (10) are both provided with trapezoidal blocks, and the width of the facing sides of the symmetrically distributed trapezoidal blocks is less than the sum of the lengths of the two adjacent sliding frames (12).

3. The metal strap tension detection device according to claim 1, characterized in that: The positioning assembly comprises symmetrically distributed rectangular slide rails (1101), the symmetrically distributed rectangular slide rails (1101) are respectively fixed to the upper sides of adjacent sliding frames (12), one of the rectangular slide rails (1101) is slidably connected to a first L-shaped frame (1102), the other rectangular slide rail (1101) is slidably connected to a second L-shaped frame (1106), and a first spring (1106) is fixedly connected between the first L-shaped frame (1102) and the adjacent rectangular slide rail (1101) and between the second L-shaped frame (1106) and the adjacent rectangular slide rail (1101). 3), the first L-shaped frame (1102) is fixedly connected to a first sliding bar (1104), the first sliding bar (1104) is slidably matched with the adjacent sliding frame (12), the second L-shaped frame (1106) is fixedly connected to a second sliding bar (1107), the second sliding bar (1107) is slidably matched with the adjacent sliding frame (12), the first L-shaped frame (1102) and the second L-shaped frame (1106) are both fixedly connected to a U-shaped plate (1105), the U-shaped plate (1105) is provided with a groove, and the sliding frame (12) is provided with an adsorption component for assisting in fixing the watch strap.

4. A metal watch strap tension detection device according to claim 3, characterized in that: The width of the groove of the U-shaped plate (1105) gradually decreases from the opening direction to the closing direction, and the minimum width of the groove is smaller than the minimum width of the sliding frame (12).

5. A metal watchband tension detection device according to claim 4, characterized in that: The inner side surface of the U-shaped plate (1105) is configured to be made of a smooth material, so as to reduce the friction force generated on the surface of the watch strap.

6. A metal watchband tension detection device according to claim 5, characterized in that: There is a distance between the projection of the U-shaped plate (1105) in the horizontal direction and the projection of the corresponding sliding frame (12) in the horizontal direction.

7. A metal watchband tension detection device according to claim 3, characterized in that: The adsorption component comprises a plurality of rubber rings (1201), the rubber rings (1201) being fixedly connected to the adjacent sliding frame (12), the sliding frame (12) being provided with a plurality of V-shaped rubber strips evenly distributed in a straight line, the sliding frame (12) being provided with through holes having the same number as the rubber rings (1201) thereon, the rubber rings (1201) being connected to adjacent through holes on the adjacent sliding frame (12), one of the symmetrically distributed clamping blocks (10) being slidably connected to a shielding plate (1202), and the other being slidably connected to a rectangular plate (1203), the shielding plate (1202) being slidably matched with the rectangular plate (1203), a second spring (1204) being fixedly connected between the shielding plate (1202) and the rectangular plate (1203), and the shielding plate (1202) being sealed and matched with the evenly distributed through holes on the adjacent sliding frame (12).

8. A metal watchband tension detection device according to claim 7, characterized in that: The thickness of the rubber ring (1201) is the same as the thickness of the V-shaped rubber strip.

9. The metal strap tension detection device according to claim 7, characterized in that: The symmetrically distributed rectangular frames (6) are all fixedly connected to a third spring (1301) on one side close to the adjacent T-shaped frame (11); the symmetrically distributed third springs (1301) are all fixedly connected to an extrusion plate (1302) on one end close to the adjacent T-shaped frame (11); and the symmetrically distributed clamping blocks (10) are all extrusion-matched with the adjacent extrusion plates (1302).

10. A metal watchband tension detection device according to claim 9, characterized in that: The invention also comprises a symmetrically distributed locking assembly, which is arranged on one side of the adjacent clamp body (5) near the adjacent T-shaped frame (11), and is used to lock the adjacent and symmetrically distributed clamp blocks (10). The locking assembly comprises two hydraulic telescopic rods (1401), which are both fixedly connected to the inner side of the adjacent clamp body (5), and the telescopic parts of the hydraulic telescopic rods (1401) are slidably connected to the adjacent clamp blocks (10). Two oil storage shells (1402) are fixedly connected to the inner side of the clamp body (5), and the fixed parts of the hydraulic telescopic rods (1401) are connected to the adjacent oil storage shells (1402) through a first pipe (1403) and a second pipe (1405). A one-way valve (1404) is provided on the first pipe (1403), and a pressure relief valve (1406) is provided on the second pipe (1405).

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