Mould locking buckle with standard scales

Abstract

The utility model relates to a mould locking buckle with standard scales in the field of mould locking buckles, which comprises a locking sleeve and a locking seat capable of being inserted and locked in the locking sleeve in a paired manner, an adjusting bolt for adjusting the tightness of a movable component is arranged in an adjusting part, and a standard indication point is arranged on the surface of the adjusting part. More than three standard scale marks with intervals are arranged on the surface of the adjusting bolt, and when the adjusting bolt is screwed to enable any one standard scale mark to point to the standard indication point, the clamping force of the locking part and the inner sleeve cavity in the locking state is a preset standard value. When the mold locking buckles are assembled, the standard scale marks point to the standard indication points, so that the clamping force locked by each mold locking buckle can be balanced and consistent, any testing tool is not needed in the using process, when the same set of mold needs to use more than two sets of mold locking buckles at the same time, the force of all the mold locking buckles can be balanced, and the assembling efficiency is improved. And the phenomenon that the whole mold locking buckle is scrapped due to improper control of the force for screwing the adjusting bolt in the assembling process can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of mold locking buckles, in particular to a mold locking buckle with a standard scale. Background Art

[0002] As a key component in mold manufacturing, the mold locking buckle is widely used in stamping molds, die-casting molds and other fields, especially in the automotive parts, equipment manufacturing and other industries. Its main function is to fix and lock the upper and lower parts of the mold to ensure that the mold will not be displaced or deformed during the processing, thereby ensuring the processing accuracy of the mold and the stability of product quality. With the continuous development of industrial manufacturing technology, the requirements for mold accuracy and stability are becoming higher and higher. The performance of the mold locking buckle directly affects the service life of the mold and the final quality of the product.

[0003] The locking buckle is mainly composed of a mold base, a mold plate, a guide column, a guide sleeve and a locking mechanism. Among them, the locking mechanism is the core part of the locking buckle, and the locking and unlocking of the mold is achieved by adjusting the bolts and other components. However, in practical applications, the traditional locking buckle still has the following defects: 1) When adjusting the locking force, it often depends on the experience and feeling of the operator. The operator needs to manually adjust the bolts based on experience, which is not only time-consuming and laborious, but also easy to cause the locking force to be too large or too small due to improper operation, and even damage the mold, which not only increases the complexity and uncertainty of the operation, but also easily leads to inconsistent locking force, thereby affecting the processing accuracy of the mold and the qualified rate of the product; 2) Insufficient precision control. When the same set of molds needs to share multiple sets of locking buckles, the locking force between different locking buckles is difficult to maintain consistency, which in turn affects the overall performance of the mold and the dimensional stability of the product. The mold opening process is prone to product damage due to unbalanced force, and affects the life of the mold; 3) Limited life. Due to inaccurate locking force control, the locking buckle is prone to wear and damage during use, and needs to be replaced frequently, increasing production costs and downtime. Utility Model Content

[0004] The purpose of the utility model is to solve the above defects and provide a locking buckle with a standard scale, which has standard scale lines added on the surface of the adjusting bolt, so as to ensure that the clamping force of each locking buckle is balanced and consistent, and the clamping force of the locking buckle can be controlled according to the standard scale lines, thereby solving a series of problems in the prior art caused by inconsistent adjustment of the clamping force of each locking buckle.

[0005] The purpose of the utility model is achieved by the following methods:

[0006] The locking buckle with standard scale includes a locking sleeve and a locking seat that can be inserted into and locked into the locking sleeve. The locking sleeve includes an inner sleeve cavity and a sleeve body mounting portion for matching and locking to the mold template. The locking seat includes an insertion rod and a seat body mounting portion for matching and locking to the mold template. The end of the insertion rod close to the locking portion is the locking portion, and the end of the insertion rod away from the locking sleeve is the adjustment portion. The interior of the insertion rod is provided with a movable component, and the movable component extends along the interior of the adjustment portion to the interior of the locking portion. The adjustment portion is provided with a connecting rod connected to the movable component and used for adjusting The locking part can be inserted into the inner sleeve cavity in pair with the adjustment bolt for adjusting the tightness of the movable component. The movable component and the inner sleeve cavity can be driven to achieve close cooperation by turning the adjustment bolt, thereby controlling the locking and unlocking of the locking part and the inner sleeve cavity. The adjustment bolt is exposed on the adjustment part, and a standard indicating point is provided on the surface of the adjustment part, and more than three standard scale lines with spacing from each other are provided on the surface of the adjustment bolt. When the adjustment bolt is turned to make any standard scale line point to the standard indicating point, the clamping force of the locking part and the inner sleeve cavity in the locked state is a preset standard value.

[0007] Furthermore, the distances between two adjacent standard scale lines are equal, and digital or letter markings are provided next to the standard scale lines.

[0008] Furthermore, the standard indicating point is arranged on the end surface of the adjusting portion where the adjusting bolt is exposed, and the standard indicating point is close to the adjusting bolt.

[0009] Furthermore, the movable component includes a push rod, a clamping wheel, a roller and a disc spring. One end of the push rod passes through the disc spring and extends to be connected to the adjusting bolt. The disc spring is used to provide elastic force to the push rod. The other end of the push rod supports the roller and the clamping wheel in turn. When the adjusting bolt is turned to a locked state, the adjusting bolt will squeeze the push rod, the roller and the clamping wheel in turn, and finally provide elastic force to the clamping wheel, so that the clamping wheel can elastically move to fit tightly with the inner sleeve cavity.

[0010] Furthermore, the inner wall of the inner sleeve cavity that is tightly matched with the clamping wheel is provided with a raised tight-fitting platform, the middle of the tight-fitting platform is provided with an inner concave arc surface that is tightly matched with the clamping wheel, and the two ends of the tight-fitting platform are provided with inclined surfaces connected to the concave arc surface.

[0011] Furthermore, there are two of the clamping wheels and rollers, and a channel for matching and installing the adjusting bolts, disc springs and push rods is opened inside the adjusting portion, and a movable groove for matching and installing the clamping wheel and roller and connected to the channel is opened inside the locking portion. The two rollers and the two clamping wheels are symmetrically arranged in the movable grooves in sequence, and the rollers and the clamping wheels can elastically move along the movable grooves, and the outer ends of the clamping wheels can elastically move outside the movable grooves and can fit tightly with the inner concave arc surface.

[0012] Furthermore, the end surface of the adjustment portion is provided with a detachable cover plate for matching and covering the movable groove.

[0013] The beneficial effects of the utility model are as follows: more than three standard scale lines are added on the surface of the adjusting bolt, and a standard indicating point is set. When the adjusting bolt is turned to make any standard scale line point to the standard indicating point, the clamping force of the locking portion and the inner sleeve cavity in the locked state is a preset standard value. More than three standard scale lines are respectively set with more than three different standard values ​​of clamping force, so that standard unified customization is realized. When assembling the locking buckle, the standard scale line is pointed to the standard indicating point to ensure that the clamping force of each locking buckle is balanced and consistent. No testing tools are needed during use. When two sets of the same mold need to be used at the same time, When installing the locking buckles on the mold, the standard indicating points of all the locking buckles can be pointed to the standard scale line with the same scale value, which can ensure that the force of all the locking buckles is balanced, and the clamping force can be easily controlled and adjusted to the preset clamping force by turning the adjusting bolts to different scale lines, avoiding the product damage caused by unbalanced force during the mold opening process, and affecting the life of the mold. In addition, it can also avoid the phenomenon that the entire locking buckle is scrapped due to improper control of the force of turning the adjusting bolts during the assembly process. By ensuring that the standard scale line points to the standard indicating point during the use and turning process, the overall service life of the locking buckle can be improved, and there is no need to frequently replace the locking buckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the locking state of the locking sleeve and the locking seat in the first embodiment of the locking mold buckle with standard scale of the utility model;

[0015] Figure 2 It is a top view of the locking state of the locking sleeve and the locking seat in the first embodiment of the locking mold buckle with standard scale of the utility model;

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of locking and unlocking of the locking sleeve and the locking seat in the first embodiment of the locking mold buckle with standard scale of the utility model;

[0017] Figure 4 It is a schematic diagram of the structural decomposition of the locking seat in the first embodiment of the locking buckle with standard scale of the utility model;

[0018] Figure 5 It is a three-dimensional structural schematic diagram of the adjusting bolt in the first embodiment of the locking buckle with standard scale of the utility model;

[0019] Figure 6 It is a schematic diagram of the three-dimensional structure of the locking sleeve and the locking seat in the locking mold buckle with standard scale of the utility model installed on the mold and the mold is in the mold closing state;

[0020] Figure 7 It is a schematic diagram of the three-dimensional structure of the locking sleeve and the locking seat in the locking mold buckle with standard scale of the utility model installed on the mold and the mold is in the mold opening state;

[0021] Figure 8 It is a three-dimensional structural schematic diagram of the locking state of the locking sleeve and the locking seat in the second embodiment of the locking mold buckle with standard scale of the utility model;

[0022] Fig. 9 It is a top view of the locking state of the locking sleeve and the locking seat in the second embodiment of the locking mold buckle with standard scale of the utility model;

[0023] In the figure, 1-locking sleeve, 2-locking seat, 3-inner sleeve cavity, 4-adjusting bolt, 5-standard indicating point, 6-standard scale line, 7-top rod, 8-disc spring, 9-roller, 10-clamp wheel, 11-movable groove, 12-cover plate, 13-tight fitting table, 14-inner concave arc surface, 15-inclined surface, 16-lower die, 17-upper die. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Embodiment 1

[0026] In this embodiment, refer to Figure 1-Figure 7 The specifically implemented locking buckle with standard scale includes a locking sleeve 1 and a locking seat 2 which can be inserted into and locked into the locking sleeve 1. The locking sleeve 1 includes an inner sleeve cavity 3 and a sleeve mounting portion for matching and locking to the mold template. The locking seat 2 includes an insertion rod and a seat mounting portion for matching and locking to the mold template.

[0027] The end of the insertion rod close to the locking part is the locking part, and the end of the insertion rod away from the locking sleeve 1 is the adjusting part. A movable component is provided inside the insertion rod, and the movable component extends from the inside of the adjusting part to the inside of the locking part. An adjusting bolt 4 connected to the movable component and used to adjust the tightness of the movable component is provided in the adjusting part. The locking part can be inserted into the inner sleeve cavity 3 in pair. By turning the adjusting bolt 4, the movable component and the inner sleeve cavity 3 are driven to achieve a close fit, thereby controlling the locking and unlocking of the locking part and the inner sleeve cavity 3.

[0028] like Figure 2 and Figure 5As shown, the adjusting bolt 4 is exposed at the adjusting portion, and the surface of the adjusting portion is provided with a standard indicating point 5, which is provided at the end surface of the adjusting portion where the adjusting bolt 4 is exposed, and the standard indicating point 5 is close to the adjusting bolt 4. In this embodiment, a hexagon socket is provided in the middle of the adjusting bolt 4, and six standard scale lines 6 with spacings are provided on the surface of the adjusting bolt 4, and the spacings between two adjacent standard scale lines 6 are equal. Digital markings are also provided next to the standard scale lines 6, and the digital markings corresponding to the six standard scale lines 6 are scale 1, scale 2, scale 3, scale 4, scale 5 and scale 6, respectively. When the adjusting bolt 4 is turned to make any standard scale line 6 point to the standard indicating point 5, the clamping force of the locking portion and the inner sleeve cavity 3 in the locked state is a preset standard value.

[0029] The locking seat 2 of this embodiment is a standard extended structure. During the production process, the rotation positions of the corresponding standard scale lines 6 are tested by a tensile tester for the maximum load in the locked state. After the test by the tensile tester, the maximum loads of the corresponding standard scale lines 6 are: the maximum load of scale 1 is 300KG, the maximum load of scale 2 is 450KG, the maximum load of scale 3 is 600KG, the maximum load of scale 4 is 520KG, the maximum load of scale 5 is 850KG, and the maximum load of scale 6 is 1000KG.

[0030] In addition, the movable assembly of this embodiment includes a push rod 7, a clamping wheel 10, a roller 9 and a disc spring 8. Figure 3 and Figure 4As shown, two clamping wheels 10 and two rollers 9 are provided, a channel for matching and installing the adjusting bolt 4, the disc spring 8 and the push rod 7 is opened inside the adjusting portion, and a movable groove 11 for matching and installing the clamping wheel 10 and the roller 9 and communicating with the channel is opened inside the locking portion, and the two rollers 9 and the two clamping wheels 10 are symmetrically arranged in the movable groove 11 in sequence, and a detachable cover plate 12 for matching and covering the movable groove 11 is provided on the end face of the adjusting portion, and the cover plate 12 is fixedly installed by screws, and it is convenient to assemble the movable components and to maintain by removing the cover plate 12. One end of the push rod 7 passes through the disc spring 8 and extends along the channel to be connected to the adjusting bolt 4. The disc spring 8 is used to provide elastic force to the push rod 7. The other end of the push rod 7 sequentially supports two rollers 9 and two clamping wheels 10 along the channel. The two rollers 9 and the two clamping wheels 10 are symmetrically distributed. When the adjusting bolt 4 is turned to the locked state, the adjusting bolt 4 will squeeze the push rod 7, the roller 9 and the clamping wheel 10 in turn. The roller 9 and the clamping wheel 10 can be elastically moved along the movable groove 11, and the outer end of the clamping wheel 10 can be elastically moved to the outside of the movable groove 11 and can be tightly matched with the inner concave arc surface 14. The disc spring 8 finally provides elastic force to the roller 9 and the clamping wheel 10, so that the clamping wheel 10 elastically moves to be tightly matched with the inner sleeve cavity 3. The inner wall of the inner sleeve cavity 3 that is tightly matched with the clamping wheel 10 is provided with a raised tight-fitting platform 13. In this embodiment, two symmetrical tight-fitting platforms 13 are provided. The middle part of the tight-fitting platform 13 is provided with an inner concave arc surface 14 that is tightly matched with the clamping wheel 10. The two ends of the tight-fitting platform 13 are provided with inclined surfaces 15 connected to the concave arc surface. The inclined surfaces 15 facilitate the clamping wheel 10 to quickly slide into the inner concave arc surface 14. When the disc spring 8 is twisted and the disc spring 8, the push rod 7, the roller 9 and the clamping wheel 10 are squeezed in turn, the two clamping wheels 10 are elastically opened and matched to be clamped to the inner concave arc surface 14.

[0031] Embodiment 2

[0032] In this embodiment, refer to Figure 8-Figure 9 The difference between the locking buckle with standard scale implemented in the specific implementation and the embodiment 1 is that the locking seat 2 of the embodiment is a standard structure, and the surface of the adjusting bolt 4 of the embodiment is provided with five standard scale lines 6, and the numbers corresponding to the five standard scale lines 6 are respectively marked as scale 1, scale 2, scale 3, scale 4 and scale 5. In the production process, the rotation positions of the corresponding standard scale lines 6 are tested by the tension tester for the maximum load of the locked state. After the test by the tension tester, the maximum loads of the corresponding standard scale lines 6 are respectively: the maximum load of scale 1 is 60KG, the maximum load of scale 2 is 90KG, the maximum load of scale 3 is 120KG, the maximum load of scale 4 is 170KG, and the maximum load of scale 5 is 200KG. Figure 8 and Fig. 9 The scale 3 shown points to the standard indication point 5 .

[0033] The sleeve body mounting part and the seat body mounting part of this embodiment are both mounted by two screws, and the locking sleeve 1 and the locking seat 2 are respectively mounted to the corresponding template side of the mold by two screws. Figure 6 and Figure 7 As shown, the locking sleeve 1 is installed to the side of the template of the lower mold 16 by two screws, and the locking seat 2 is installed to the side of the template of the upper mold 17 by two screws. When two sets of locking buckles are used for the same mold at the same time, the operator points the standard indicator points 5 of the two locking buckles to the standard scale line 6 of the same scale value. If both point to scale 2, the force of all locking buckles can be balanced, and the clamping force can be easily controlled and adjusted to the preset clamping force by turning the adjustment bolt 4 to different scale lines, avoiding the problem of product damage caused by unbalanced force during the mold opening process and affecting the mold life.

[0034] The manufacturing process of the locking buckle of this embodiment includes the following steps: the first step is material preparation, the second step is processing and forming, the third step is quenching treatment, the fourth step is surface treatment, the fifth step is assembly and forming, the sixth step is tensile testing, and the seventh step is setting scales. The detailed manufacturing process of each step is as follows:

[0035] The first step is material preparation. Select alloy raw materials that meet the hardness requirements, such as stainless steel, aluminum alloy, alloy steel, which have sufficient strength, hardness and wear resistance to meet the working requirements of the mold under high pressure and high temperature environment, and cut or cut according to the preset size to meet the size requirements of the locking sleeve 1 and the locking seat 2.

[0036] The second step is processing and forming. Each component is processed and formed according to the preset size requirements. Each component includes a locking sleeve 1, a locking seat 2, an adjustment bolt 4 and a movable component. Processing and forming include roughing, semi-finishing and precision machining. Semi-finishing and precision machining can be completed after quenching. The rough machining process uses machine tools such as milling machines and lathes to rough-process the blanks, remove excess materials, and obtain a rough shape and size. In the semi-finishing stage, the locking buckle is further processed using machine tools such as grinders and milling machines to improve its accuracy and surface quality. This stage may include machining operations such as drilling and tapping to meet the specific design requirements of the locking buckle. Precision machining uses precision machining methods such as EDM and wire cutting to process the key parts of the locking buckle to ensure its accuracy and fit requirements. These precision machining methods can handle complex shapes and subtle structures and improve the overall performance of the locking buckle.

[0037] The third step is quenching treatment. First, the locking sleeve 1, the locking seat 2 and the movable component are quenched to improve their surface hardness and wear resistance. The quenching process heats the locking sleeve 1, the locking seat 2 and the movable component to a high temperature and then cools them rapidly, using oil or water as the cooling medium. The heating temperature of the quenching process is controlled at 800-950℃, and the cooling medium temperature is controlled between room temperature and 60℃. After the quenching treatment is completed, tempering treatment is required. The tempering temperature is controlled at 200-600℃ to eliminate internal stress and improve toughness and stability. After the quenching treatment is controlled, the hardness is tested and the hardness is controlled to 48-52 degrees. If the hardness test does not meet the standard of 48-52 degrees, a secondary quenching treatment is performed.

[0038] The fourth step is surface treatment. The locking sleeve 1 and the locking seat 2 are subjected to electrophoretic treatment to form a uniform and dense coating on the surface of the locking sleeve 1 and the locking seat 2. The workpiece needs to be pre-treated before electrophoretic treatment: including degreasing, hot water washing, rust removal, cold water washing, phosphating, hot water washing, and passivation steps to ensure that the surface of the workpiece is clean and free of oil and impurities, providing a good foundation for electrophoretic coating. The treated workpiece is placed in the electrophoretic tank and direct current is passed through so that the paint particles are deposited on the surface of the workpiece under the action of the electric field to form a coating. After the electrophoretic treatment is completed, the workpiece needs to be post-treated: including water washing and drying steps to remove residual paint and moisture on the surface of the workpiece, so that the coating is cured and meets the required performance requirements. The solids in the electrophoretic coating are coated to avoid the occurrence of undesirable phenomena such as caking, lack of paint, and flow marks. The coating has good corrosion resistance and decorative properties.

[0039] The fifth step is to assemble and form the movable component and the adjusting bolt 4 into the locking sleeve 1. The movable component of this embodiment includes a push rod 7, two clamping wheels 10, two rollers 9 and a disc spring 8. The adjusting bolt 4, the push rod 7, the two clamping wheels 10, the two rollers 9 and the disc spring 8 are assembled into the locking sleeve 1.

[0040] The sixth step is tension detection. The locking seat 2 is inserted into the locking sleeve 1 and locked to the locking sleeve 1 by turning the adjusting bolt 4. The maximum load of the locked state is tested by a tension tester. A standard indicating point 5 is set on the surface of the locking seat 2. The first maximum load is set by the tension tester during the test process. The adjusting bolt 4 is turned to make it reach the first maximum load during the test process. At this time, the rotation position of the adjusting bolt 4 can be determined according to the standard indicating point 5, and the rotation position of the adjusting bolt 4 when the first maximum load is reached is recorded by marking. Then, the second maximum load, the third maximum load, the fourth maximum load, the fifth maximum load and the sixth maximum load are set in turn by the tension tester in the same way, and the rotation position of the adjusting bolt 4 when the second maximum load, the third maximum load, the fourth maximum load, the fifth maximum load and the sixth maximum load are marked in the same way. In this step, the electric screwdriver can be used to record the rotation position when the adjusting bolt 4 is turned to the first maximum load, and the strength of the electric screwdriver can be marked. In the subsequent production of other new locking buckles, the adjusting bolt 4 can be assembled using the pre-recorded strength of the electric screwdriver to ensure that the point where the adjusting bolt 4 points to the direction of the standard indication point 5 after being turned and installed by the electric screwdriver is the first maximum load. Therefore, there is no need to use a tensile tester for testing, which can improve the overall assembly efficiency and production efficiency of the product and ensure that the clamping force set by the locking buckle is consistent.

[0041] The seventh step is to set the scale. Standard scale lines 6 are set on the surface of the adjusting bolt 4 in sequence. There are six standard scale lines 6 in total. The position of the standard scale lines 6 corresponds to the rotation position of the adjusting bolt 4 marked by six tests in the sixth step. Specifically, six standard scale lines 6 are engraved by laser engraving, and the standard indication point 5 in the sixth step is engraved by laser engraving at the same time. The standard indication point 5 is located on the plane where the adjusting bolt 4 is located, and a digital mark is engraved by laser engraving next to the standard scale line 6. Before leaving the factory, a tensile test is performed using a tensile tester. The standard scale lines 6 and standard indication points 5 are set through the tensile test to ensure that each corresponding standard scale line 6 corresponds to the maximum load. The standard scale lines 6 and the corresponding standard values ​​are set through multiple tests before leaving the factory. This can improve the overall quality of the locking buckle, ensure product quality and unified standards, and make the clamping force of the locking buckle leaving the factory balanced and consistent.

[0042] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as the protection scope of the present invention.

Claims

1. A locking buckle with a standard scale, comprising a locking sleeve and a locking seat that can be inserted into and locked into the locking sleeve, the locking sleeve comprising an inner sleeve cavity and a sleeve body mounting portion for matching and locking to the mold template, the locking seat comprising an insertion rod and a seat body mounting portion for matching and locking to the mold template, the end of the insertion rod close to the locking portion is the locking portion, and the end of the insertion rod away from the locking sleeve is the adjustment portion, characterized in that: A movable component is provided inside the insertion rod, and the movable component extends along the inside of the adjustment part to the inside of the locking part. An adjusting bolt is provided in the adjustment part, which is connected to the movable component and is used to adjust the tightness of the movable component. The locking part can be inserted into the inner sleeve cavity in a matching manner, and the movable component and the inner sleeve cavity are driven to achieve a close fit by turning the adjusting bolt, thereby controlling the locking and unlocking of the locking part and the inner sleeve cavity. The adjusting bolt is exposed on the adjusting part, and a standard indicating point is provided on the surface of the adjusting part, and more than three standard scale lines with spacing from each other are provided on the surface of the adjusting bolt. When the adjusting bolt is turned to make any one of the standard scale lines point to the standard indicating point, the clamping force of the locking part and the inner sleeve cavity in a locked state is a preset standard value.

2. The locking buckle with standard scale according to claim 1, characterized in that: The distance between two adjacent standard scale lines is equal, and there are also numerical or letter markings next to the standard scale lines.

3. The locking buckle with standard scale according to claim 1, characterized in that: The standard indicating point is arranged on the end surface of the adjusting portion where the adjusting bolt is exposed, and the standard indicating point is close to the adjusting bolt.

4. The locking buckle with standard scale according to any one of claims 1 to 3, characterized in that: The movable assembly includes a push rod, a clamping wheel, a roller and a disc spring. One end of the push rod passes through the disc spring and extends to be connected to the adjusting bolt. The disc spring is used to provide elastic force to the push rod. The other end of the push rod supports the roller and the clamping wheel in turn. When the adjusting bolt is turned to a locked state, the adjusting bolt will squeeze the push rod, the roller and the clamping wheel in turn, and finally provide elastic force to the clamping wheel, so that the clamping wheel can elastically move to fit tightly with the inner sleeve cavity.

5. The locking buckle with standard scale according to claim 4, characterized in that: The inner wall of the inner sleeve cavity that is tightly matched with the clamping wheel is provided with a raised tight-fitting platform, the middle of the tight-fitting platform is provided with an inner concave arc surface that is tightly matched with the clamping wheel, and the two ends of the tight-fitting platform are provided with inclined surfaces connected to the concave arc surface.

6. The locking buckle with standard scale according to claim 5, characterized in that: There are two of the clamping wheels and rollers, and the interior of the adjustment part is provided with a channel for matching and installing the adjusting bolt, the disc spring and the push rod. The interior of the locking part is provided with a movable groove for matching and installing the clamping wheel and the roller and connected to the channel. The two rollers and the two clamping wheels are symmetrically arranged in the movable groove in sequence. The rollers and the clamping wheels can elastically move along the movable groove, and the outer end of the clamping wheel can elastically move outside the movable groove and can be tightly matched with the inner concave arc surface.

7. The locking buckle with standard scale according to claim 6, characterized in that: The end surface of the adjusting portion is provided with a detachable cover plate for matching and covering the movable groove.

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