Large-caliber return calipers

Abstract

The invention discloses large-diameter return calipers and relates to the technical field of calipers, the large-diameter return calipers comprise an upper holding handle, an upper calipers piece, a lower calipers piece and a lower holding handle, the upper calipers piece is arranged on the outer side wall of one side of the upper holding handle, the lower calipers piece matched with the upper calipers piece is embedded in the side wall of an inner cavity of the upper calipers piece, and the lower holding handle is arranged on the side wall of one side of the lower calipers piece; by means of the upper caliper part and the lower caliper part, a larger clamping opening can be conveniently adjusted, the size of an object clamped by the opening and closing clamping opening is increased, certain return force supporting is conveniently carried out when the object is clamped by the clamping opening, the structure is simple, and operation is convenient and fast.

Description

Technical Field

[0001] This invention relates to the field of caliper technology, specifically to large-diameter pullback calipers. Background Technology

[0002] Calipers were initially used primarily for simple mechanical clamping and fixing. With the advancement of industrial technology, the requirements for the precision, stability, and durability of calipers have been continuously increasing. Large-diameter return calipers, by increasing the jaw size and optimizing the clamping structure, can provide greater clamping force to meet the requirements for clamping and processing large-sized workpieces. However, most large-diameter return calipers cannot adjust to a larger jaw size. As they are fixed rotating jaw calipers, the size of the items that can be clamped by the opening and closing jaws is limited. Furthermore, it is not convenient to perform a certain degree of self-locking and stable clamping when clamping items to avoid external interference or the operator releasing the force and causing the jaws to detach from the clamped items, resulting in the items being dropped and damaged. For example, prior art application number CN207289866U provides pliers, which include at least one pliers body, the pliers body including pliers head and pliers handle connected to the pliers head; the pliers head is equipped with an insert, the insert including pliers blades; the pliers blades are made of diamond. This invention improves the hardness and strength of the pliers blades, which can, to a certain extent, prevent chipping, rolling, and other issues, extend the service life of the pliers, and improve work efficiency. Based on actual usage, the aforementioned prior art mainly improves the hardness and strength of the pliers by using diamond as the material for the pliers blades. However, it has been found that it cannot adjust to a larger clamping jaw, the size of the items that can be clamped is limited, and it is not convenient to provide a certain amount of backlash support when clamping items. Therefore, based on actual usage, we have improved the aforementioned prior art. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0005] To achieve the above objectives, the present invention provides the following technical solution: Large-diameter pullback caliper, including upper handle, upper caliper assembly, lower caliper assembly, and lower handle; An upper caliper is provided on the outer side wall of one side of the upper handle; The upper caliper has a matching lower caliper embedded in the inner wall of the cavity, and a lower grip handle is provided on one side wall of the lower caliper.

[0006] Furthermore: the upper caliper includes a support shell disposed on the outer side wall of one side of the upper handle, a movable groove is provided on the inner cavity side wall of one side of the support shell, and an arc-shaped clamping plate matching the movable groove is rotatably connected to both side walls of the movable groove, and a limiting hook plate matching the movable groove is rotatably connected to one side of the side wall adjacent to the arc-shaped clamping plate, and a first caliper tooth is provided on the bottom side wall of the other side of the support shell.

[0007] Furthermore: the movable groove includes a torsion spring provided on the side wall adjacent to the middle position of the arc-shaped card plate and the limiting hook plate, the top end of the torsion spring being provided on the bottom side wall of the limiting hook plate, and the bottom end of the torsion spring being provided on the top side wall of the arc-shaped card plate.

[0008] Furthermore: the lower clamping component includes a support rod disposed on one side wall of the lower grip handle, one end of the support rod extending to the bottom outer wall of the inner cavity of the movable groove, and a size scale mark is provided on one side outer wall of the support rod, and a second clamping tooth is provided at the bottom of one side outer wall of the support rod that matches the first clamping tooth, and a first clamping tooth is provided on the top side wall of the support rod.

[0009] Furthermore: the arc-shaped chuck includes a second chuck that engages with the first chuck on its bottom sidewall.

[0010] Furthermore: the support shell includes pointers provided on the outer wall.

[0011] Furthermore: an upper grip sleeve is installed on the outer end of the upper grip, and upper sliding grooves are provided on both sides of the upper grip. Upper sliding bars matching the upper sliding grooves are provided on the inner walls of both sides of the upper grip sleeve. A lower grip sleeve is installed on the outer end of the lower grip, and lower sliding grooves are provided on both sides of the lower grip. Lower sliding bars matching the lower sliding grooves are provided on the inner walls of both sides of the lower grip sleeve.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the present invention, through the upper and lower clamping parts, facilitates the adjustment of a larger clamping jaw, allowing for the gripping of larger items, and facilitates a certain amount of back support when clamping items. The structure is simple and the operation is convenient. Specifically, when clamping an item, the operator manually moves the support rod to adjust the distance between the second clamping jaw, which is matched with the first clamping jaw, located on the bottom of one side of the outer wall, and the first clamping jaw, located on the bottom side wall of the other side of the support shell, to the size of the clamping jaw adapted to the size of the item being clamped. After adjustment, the operator presses the upper and lower handles together, and the engagement of the first and second clamping jaws further increases the clamping force. Furthermore, the limiting hook plate limits the arc-shaped clamping plate, preventing it from falling off. A torsion spring is installed on the side wall of the movable slot adjacent to the middle position of the arc-shaped clamping plate and the limiting hook plate. This allows for manual pressing of the bottom of the limiting hook plate upwards, which engages the bottom side wall of the arc-shaped clamping plate with a second clamping rack that matches the first clamping rack, thus disengaging it. When the limiting hook plate is released, the arc-shaped clamping plate, through the action of the torsion spring, returns, causing the bottom side wall of the arc-shaped clamping plate to re-engage with the second clamping rack that matches the first clamping rack. This facilitates the second clamping rack disengaging from the first clamping rack and provides a return force support during engagement, allowing for the movement and adjustment of the second clamping jaws. Dimensional scales are installed on one side of the support rod, and pointers are installed on the outer side of the support shell, allowing the operator to observe and adjust the clamping jaw spacing. Furthermore, the length of the handle can be changed by the cooperation of the grip sleeve and the sliding transverse groove to adapt to different working needs.

[0013] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0014] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3This is a cross-sectional view of the upper and lower clamp components of the present invention.

[0017] In the diagram: 1. Upper grip handle; 101. Upper grip cover; 102. Upper sliding groove; 2. Upper caliper assembly; 21. Support shell; 211. Pointer; 22. First caliper jaws; 23. Movable groove; 231. Torsion spring; 24. Arc-shaped locking plate; 241. Second locking rack; 25. Limiting hook plate; 3. Lower caliper assembly; 31. Second caliper jaws; 32. Dimension scale; 33. First locking rack; 34. Support rod; 4. Lower grip handle; 401. Lower grip cover; 402. Lower sliding groove. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0021] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0022] Please see Figure 1-3 The present invention provides a technical solution: a large-diameter return caliper, including an upper handle 1, an upper caliper 2, a lower caliper 3, and a lower handle 4. An upper handle cover 101 is installed on the outer end of the upper handle 1, and upper sliding grooves 102 are provided on both sides of the upper handle 1. Upper sliding bars matching the upper sliding grooves 102 are provided on the inner walls of both sides of the upper handle cover 101. A lower handle cover 401 is installed on the outer end of the lower handle, and lower sliding grooves 402 are provided on both sides of the lower handle 401. Lower sliding bars matching the lower sliding grooves 402 are provided on the inner walls of both sides of the lower handle cover 401. It should be noted that the upper sliding groove 102 and the lower sliding groove 403 are not through-type on the upper handle 1 and the lower handle 4, but have a certain limiting function. The upper handle sleeve 101 and the lower handle sleeve 401 can be slidably connected to the sliding groove through the upper and lower sliding bars provided on their inner walls, so that the length of the upper handle 1 and the lower handle 4 can be adjusted to adapt to different working needs. It should be noted that there is a certain friction between the sliding groove and the sliding bar, and the sliding bar will not fall off in the sliding groove because the sliding groove has a certain limiting function. This design can also be used in other pliers.

[0023] An upper clamping component 2 is provided on the outer side wall of one side of the upper handle 1; The upper clamp 2 has a matching lower clamp 3 embedded in the inner side wall of the cavity. The lower clamp 3 has a lower handle 4 on one side wall. The upper clamp 2 and the lower clamp 3 can be adjusted to make the clamp larger, so that the size of the item can be clamped by the opening and closing clamp. It also makes it easy to provide a certain amount of back force support when the clamp is clamping the item. The structure is simple and the operation is convenient.

[0024] Preferably, the upper clamp component 2 includes a support shell 21 disposed on the outer side wall of one side of the upper handle 1. A movable groove 23 is formed on the inner side wall of one side of the support shell 21. Arc-shaped clamping plates 24 matching the movable groove 23 are rotatably connected to both side walls of the movable groove 23. Limiting hook plates 25 matching the movable groove 23 are rotatably connected to both side walls adjacent to the arc-shaped clamping plates 24 on the other side of the movable groove 23. A first clamping jaw 22 is provided on the bottom side wall of the other side of the support shell 21. The operator manually moves the support rod 34 to move the bottom of one side of the outer wall. A second clamping jaw 31, matching the first clamping jaw 22, is provided in the inner cavity of the movable groove 23. The spacing between the first clamping jaw 22 and the bottom side wall of the support shell 21 is adjusted to accommodate the size of the clamping jaws of the object being clamped. After adjustment, the upper handle 1 and the lower handle 4 are brought closer together by pressing them with both hands. The first locking rack 33 and the matching second locking rack 241 engage, further increasing the clamping force of the first clamping jaw 22 and the second clamping jaw 31. The limiting hook plate 25 limits the arc-shaped locking plate 24 to prevent it from falling.

[0025] Preferably, the movable groove 23 includes a torsion spring 231 disposed on the side wall adjacent to the middle position of the arc-shaped clamping plate 24 and the limiting hook plate 25. The top end of the torsion spring 231 is disposed on the bottom side wall of the limiting hook plate 25, and the bottom end of the torsion spring 231 is disposed on the top side wall of the arc-shaped clamping plate 24. The torsion spring 231 disposed on the side wall adjacent to the middle position of the arc-shaped clamping plate 24 and the limiting hook plate 25 through the movable groove 23 facilitates manual pressing of the bottom of the limiting hook plate 25 to drive it upward. The bottom side wall of the arc-shaped card plate 24 engages with the second card rack 241 that matches the first card rack 33, allowing it to disengage from the first card rack 33. When the pressing limit hook plate 25 is released, the arc-shaped card plate 24, through the action of the torsion spring 231, exerts a return force, causing the bottom side wall of the arc-shaped card plate 24 to re-engage with the second card rack 241 that matches the first card rack 33, thus facilitating the return force support function of the second card rack 241 during disengagement from and engagement with the first card rack 33.

[0026] Preferably, the lower clamping member 3 includes a support rod 34 disposed on one side wall of the lower grip handle 4. One end of the support rod 34 extends to the bottom outer wall of the inner cavity of the movable groove 23. A size scale 32 is provided on one side outer wall of the support rod 34, and a second clamping jaw 31 matching the first clamping jaw 22 is provided at the bottom of one side outer wall of the support rod 34. A first clamping rack 33 is provided on the top side wall of the support rod 34. The second clamping jaw 31 can be manually moved and adjusted by the operator. The size scale 32 on one side outer wall of the support rod 34 and the pointer 211 on the outer wall of the support shell 21 facilitate the operator to observe the size of the clamping jaws and make adjustments.

[0027] Preferably, the arc-shaped clamping plate 24 includes a second clamping rack 241 that meshes with the first clamping rack 33 on its bottom sidewall. Through the meshing action of the first clamping rack 33 and the matching second clamping rack 241, the clamping force is further increased by the first clamping jaw 22 and the second clamping jaw 31.

[0028] Preferably, the support shell 21 includes a pointer 211 on its outer wall, and the support shell 21 includes a pointer 211 on its outer wall, which is provided with a size scale 32 on one side of the support rod 34. The pointer 211 on the outer wall of the support shell 21 facilitates the operator to observe the size of the clamping gap and make adjustments.

[0029] Example: At the start of work, when gripping an item, the operator manually moves the support rod 34 to adjust the distance between the second clamping jaw 31 (which matches the first clamping jaw 22) on the bottom of one side of the outer wall of the support shell 21 and the first clamping jaw 22 on the bottom side wall of the other side of the support shell 21, which is adapted to the size of the clamping jaws of the item being gripped. After adjustment, the operator presses the upper handle 1 and the lower handle 4 with both hands to bring them closer together. Through the engagement of the first locking rack 33 and the matching second locking rack 241, the clamping force of the first clamping jaw 22 and the second clamping jaw 31 is further increased. The limiting hook plate 25 limits the arc-shaped clamping plate 24 to prevent it from falling. A torsion spring 231 is provided on the side wall of the movable groove 23 adjacent to the middle position of the arc-shaped clamping plate 24 and the limiting hook plate 25, which facilitates manual pressing of the bottom of the limiting hook plate 25 to drive the bottom side wall of the arc-shaped clamping plate 24 to engage with the first clamping jaw 24. The second toothed rack 241, which matches the first toothed rack 33, disengages from the first toothed rack 33. The pressing limit hook plate 25 is released, and the arc-shaped clamping plate 24, through the action of the torsion spring 231, experiences a return force, causing the bottom side wall of the arc-shaped clamping plate 24 to engage with the second toothed rack 241, which matches the first toothed rack 33, and re-engage with the first toothed rack 33. This facilitates the return force support during the disengagement and engagement of the second toothed rack 241, allowing for the adjustment of the second clamping jaws 31. Furthermore, the size scale 32 on one side of the support rod 34 and the pointer 211 on the outer side of the support shell 21 allow the operator to observe and adjust the clamping jaw spacing. Through these operations, a larger clamping jaw can be adjusted, increasing the size of the items that can be clamped, and providing a certain amount of return force support when clamping items. The structure is simple and the operation is convenient.

[0030] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A large-diameter pullback caliper, characterized in that: Includes an upper grip handle (1), an upper caliper (2), a lower caliper (3), and a lower grip handle (4); The upper grip (1) is provided with an upper caliper (2) on one side of the outer wall. The upper clamp (2) has a matching lower clamp (3) embedded in its inner cavity side wall, and a lower handle (4) is provided on one side wall of the lower clamp (3).

2. The large-diameter pullback caliper according to claim 1, characterized in that: The upper clamping member (2) includes a support shell (21) disposed on the outer side wall of the upper handle (1). A movable groove (23) is provided on the inner side wall of the support shell (21). Both sides of the movable groove (23) are rotatably connected to an arc-shaped clamping plate (24) that matches the movable groove (23). A limiting hook plate (25) that matches the movable groove (23) is rotatably connected to one side of the side wall adjacent to the arc-shaped clamping plate (24). A first clamping tooth (22) is provided on the bottom side wall of the other side of the support shell (21).

3. The large-diameter pullback caliper according to claim 2, characterized in that: The movable groove (23) includes a torsion spring (231) provided on the side wall adjacent to the middle position of the arc-shaped card plate (24) and the limiting hook plate (25). The top end of the torsion spring (231) is located on the bottom side wall of the limiting hook plate (25), and the bottom end of the torsion spring (231) is located on the top side wall of the arc-shaped card plate (24).

4. The large-diameter pullback caliper according to claim 1, characterized in that: The lower clamp (3) includes a support rod (34) disposed on one side wall of the lower grip (4), one end of the support rod (34) extending to the bottom outer wall of the inner cavity of the movable groove (23), and a size scale (32) is provided on one side outer wall of the support rod (34), and a second clamping tooth (31) matching the first clamping tooth (22) is provided at the bottom of one side outer wall of the support rod (34), and a first clamping tooth (33) is provided on the top side wall of the support rod (34).

5. The large-diameter pullback caliper according to claim 2, characterized in that: The arc-shaped card plate (24) includes a second card rack (241) that meshes with the first card rack (33) on its bottom sidewall.

6. The large-diameter pullback caliper according to claim 2, characterized in that: The support shell (21) includes a pointer (211) provided on the outer wall.

7. The large-diameter pullback caliper according to claim 1, characterized in that: The upper handle (1) is fitted with an upper handle sleeve (101) at its outer end, and upper sliding grooves (102) are provided on both sides of the upper handle (1). Upper sliding bars matching the upper sliding grooves (102) are provided on the inner walls of both sides of the upper handle sleeve (101). The lower handle is fitted with a lower handle sleeve (401) at its outer end, and lower sliding grooves (402) are provided on both sides of the lower handle (4). Lower sliding bars matching the lower sliding grooves (402) are provided on the inner walls of both sides of the lower handle sleeve (401).

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