Horizontal measuring tool

Abstract

The invention relates to the technical field of cross beam bases, in particular to a horizontal measurement tool which comprises a cross beam and two bases, a reinforcing assembly is arranged on the surface of the cross beam, the two bases are symmetrically arranged below the two ends of the cross beam respectively, and the reinforcing assembly comprises a connecting sleeve arranged on the surface of the cross beam in a sleeving mode; by means of the inclined auxiliary beams distributed in the wave shape, the arch supporting effect on the middle of the cross beam can be achieved, deformation of the cross beam caused by gravity influence at the position can be reduced to the maximum extent, meanwhile, the overall weight of the base can be reduced by forming the cavity, and through the arrangement of the cylindrical supporting pieces and the *-shaped ribs, the service life of the base can be prolonged. The cylindrical structure has excellent radial rigidity and torsional rigidity, and the diverging ribs which are shaped like the Chinese character'mi 'and surround the cylindrical structure can uniformly and efficiently disperse concentrated loads (such as force transmitted by a beam body) from the upper part to the whole bottom surface of the base, so that the strength and the stability of the base can be ensured under the condition that the weight of the base is reduced.

Description

Technical Field

[0001] This application relates to the field of beam base technology, and in particular to a horizontal measuring tool. Background Technology

[0002] In the design of modern machine tool fixtures and high-precision measuring fixtures, the base and crossbeam, as the core load-bearing structures, directly determine the stability, accuracy retention, and service life of the fixture.

[0003] Currently, conventional bases mostly use simple rib supports, which make it difficult to balance support strength and structural stability. The crossbeam is usually composed of a main beam and a straight secondary beam. After the two ends of the main beam are fixed to the base, the middle part is prone to deformation due to its own weight or load. Moreover, the secondary beam lacks a targeted force balance design and cannot counteract the horizontal force, resulting in insufficient overall stability of the tooling and making it difficult to meet the needs of high-precision measurement or processing scenarios.

[0004] Therefore, this application provides a horizontal measuring fixture. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a horizontal measuring fixture that solves the problems of poor stability of the base support structure, easy deformation of the middle of the main beam due to gravity, and inability of the secondary beam to effectively counteract horizontal forces, resulting in poor overall stability of the fixture and difficulty in guaranteeing measurement accuracy.

[0006] The purpose of this application is to solve at least one technical problem raised in the background art.

[0007] This application provides a horizontal measuring fixture, including a crossbeam and bases. The surface of the crossbeam is provided with reinforcing components, and there are two bases, which are symmetrically arranged below both ends of the crossbeam.

[0008] The reinforcing component includes several connecting sleeves fitted onto the surface of the crossbeam. The connecting sleeves are equidistantly fitted onto the surface of the crossbeam, and inclined secondary beams are fixedly installed between the connecting sleeves. The inclined secondary beams installed on both sides of the connecting sleeves located in the middle of the crossbeam are arranged in an arch shape, and the inclined secondary beams are distributed in a wave shape between the connecting sleeves.

[0009] By adopting the above technical solution, this arched design connects with the inclined sub-beams in other positions to form a wavy network of reinforcing ribs distributed along the surface of the beam. This effectively distributes the load (especially the load in the middle) to multiple support points, significantly improves the bending resistance of the beam, minimizes the deformation of the beam due to gravity, and improves measurement accuracy.

[0010] Preferably, the base has a cavity inside, and a cylindrical support and a star-shaped rib are respectively arranged inside the cavity. The star-shaped rib is arranged in a circumferential array on the surface of the cylindrical support.

[0011] By adopting the above technical solution, the overall weight of the base can be reduced by opening the cavity, and the cylindrical structure itself has excellent radial stiffness and torsional stiffness through the setting of cylindrical support members and cross-shaped ribs. The cross-shaped radiating ribs around it can evenly and efficiently distribute the concentrated load from above to the entire bottom surface of the base, thus ensuring its strength and stability while reducing the weight of the base.

[0012] Preferably, a slider assembly is provided at the bottom of the base, and the base is slidably connected to the slide rail of the external machine tool through the slider assembly. The cavity is filled with sound insulation material, which can be any one of sound insulation cotton, polyurethane foam or glass wool.

[0013] By adopting the above technical solution and using sound insulation materials, noise reduction can be achieved when the base slides on an external machine tool.

[0014] Preferably, two of the connecting sleeves adjacent to the base are provided with a docking mechanism to achieve a stable and detachable connection between the beam and the base. The docking mechanism includes two symmetrically arranged sockets on the upper surface of the base and extending into the cavity. The lower surfaces of the two connecting sleeves at the ends of the beam are fixedly connected to the sockets with insert plates extending into the cavity. The inner front wall and inner rear wall of the cavity are fixedly installed with mounting cylinders. The mounting cylinders are provided with limiting rods inside. The front and back of the insert plates are provided with slots that are adapted to the limiting rods. The limiting rods are engaged with the slots. Through the insertion and engagement of the insert plates and the sockets, combined with the pin-type locking of the limiting rods, a docking mechanism with a simple structure, convenient assembly and disassembly, and stable connection is formed.

[0015] By adopting the above technical solution, and through the setting of the limiting rod and the insert plate, when the connecting sleeve is placed above the base, the limiting rod is inserted into the slot of the insert plate, and the connecting sleeve is fixed above the base.

[0016] Preferably, the base has sliding holes on both the front and back sides that extend into the mounting cylinder. The end of the limiting rod away from the insert plate is fixedly connected to a pull rod through the sliding hole. A No. 1 spring is sleeved on the surface of the pull rod, and the two ends of the No. 1 spring are fixedly connected to the inner wall of the mounting cylinder and the end of the limiting rod, respectively.

[0017] By adopting the above technical solution, the pull rod can be used to pull the limiting rod back into the mounting cylinder, separating it from the insert plate and releasing the restriction. The first spring can be used to push the limiting rod out of the mounting cylinder, making it engage with the insert plate and facilitating the docking of the tooling.

[0018] Preferably, the upper and lower surfaces of the limiting rod are provided with guide blocks, and the inner top and bottom walls of the mounting cylinder are provided with guide grooves for the guide blocks to slide.

[0019] By adopting the above technical solution and setting the guide slider, the limiting rod can smoothly slide in a directional manner with the installation cylinder.

[0020] Preferably, the upper surface of the base has four sliding slots, which are divided into two groups of two. Each group of two sliding slots has a connecting rod slidably connected inside. The upper ends of the two groups of connecting rods are fixedly installed with side baffles. The surface of the side baffles has screw holes. A transmission plate is installed inside the cavity. The lower ends of the two groups of connecting rods and the surface of the transmission plate have grooves. The inside of the grooves is hinged with a transmission rod through a rotating shaft.

[0021] By adopting the above technical solution, the transmission plate, transmission rod, and side baffle are configured so that the transmission plate can be pushed down when the insert plate is inserted into the socket. The downward movement of the transmission plate drives the two side baffles to abut against the surface of the connecting sleeve through two sets of transmission rods and two sets of connecting rods, so as to facilitate the installation of bolts in the screw holes and provide convenience for its assembly.

[0022] Preferably, the inner wall of the sliding strip opening is provided with an installation groove, and a second spring is fixedly installed on the inner wall of the installation groove. The end of the second spring away from the inner wall of the installation groove is fixedly connected to the surface of the connecting rod. A limit slider is provided on the surface of the connecting rod, and a limit groove is provided on the inner wall of the sliding strip opening for the limit slider to slide. Under the guidance of the limit slider, the connecting rod can slide in a directional manner within the sliding strip opening.

[0023] By adopting the above technical solution, the setting of the No. 2 spring allows the connecting rod to move and reset when the insert plate moves upward within the insertion port, without the pressure of the insert plate, so that the side baffle separates from the connecting sleeve, making disassembly convenient.

[0024] Preferably, the two side baffles are provided with grooves on their opposite surfaces. A No. 3 spring is fixedly installed on the inner wall of the groove. A positioning block is fixedly installed on the end of the No. 3 spring away from the inner wall of the groove. The front and back of the connecting sleeve are provided with slots that match the positioning block. The positioning block engages with the slots on the surface of the connecting sleeve.

[0025] By adopting the above technical solution, and through the setting of positioning blocks and slots, when the side baffle abuts against the connecting sleeve, the positioning blocks are inserted into the slots to lock them. This structure can effectively prevent the crossbeam and the connecting sleeve from accidentally sliding or shifting during subsequent bolt installation, improving the convenience and accuracy of assembly, and also providing assistance for precise alignment between multiple components.

[0026] Preferably, the upper and lower surfaces of the positioning block are provided with sliding blocks, and the inner top wall and inner top wall of the groove are provided with sliding grooves for the sliding blocks to slide.

[0027] By adopting the above technical solution, the positioning block can smoothly slide in the groove under the sliding assistance of the slider.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The horizontal measuring fixture described in this application, through several wavy, inclined secondary beams, can provide arch support for the middle of the crossbeam, minimizing the deformation of the crossbeam under gravity at that point and improving measurement accuracy. At the same time, the opening of the cavity can reduce the overall weight of the base, and through the setting of the cylindrical support and the cross-shaped ribs, the cylindrical structure itself has excellent radial stiffness and torsional stiffness, while the cross-shaped radiating ribs around it can evenly and efficiently distribute the concentrated load from above (such as the force transmitted from the beam) to the entire bottom surface of the base, thus ensuring its strength and stability while reducing the weight of the base.

[0030] 2. The horizontal measuring fixture described in this application aligns the insert plate at the lower end of the connecting sleeve with and inserts it into the reserved slot on the upper surface of the base. At this time, the crossbeam is supported between the two bases by the connecting sleeve, completing the initial positioning. During the insertion of the insert plate, the lower end of the insert plate contacts the transmission plate and drives it to move downward. During this period, the No. 1 spring located inside the mounting cylinder is in a compressed and stored energy state. When the insert plate is in place, the No. 1 spring releases its elastic force, pushing the limiting rod outward from the mounting cylinder, so that its front end is embedded in the slot on the side of the insert plate, locking the insert plate and preventing it from falling out. This securely connects the connecting sleeve and the crossbeam into one unit, achieving a pre-installation effect and facilitating subsequent fixing work.

[0031] 3. The horizontal measuring fixture described in this application involves inserting a plate to push a transmission plate downwards. The downward movement of the transmission plate drives two side baffles to move closer together via two sets of transmission rods and two sets of connecting rods until the two side baffles abut against both sides of the crossbeam. This causes the positioning blocks on the opposite surfaces of the two side baffles to insert into the slots on the surface of the connecting sleeve, clamping the connecting sleeve above the base. Subsequently, bolts are installed in the screw holes to complete the overall installation. This significantly reduces manual adjustment and the use of auxiliary tools, improving assembly efficiency and reliability. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0033] Figure 2 This is a partial cross-sectional structural diagram of an embodiment of this application;

[0034] Figure 3 This is a partial side sectional structural diagram of an embodiment of this application;

[0035] Figure 4 This is an embodiment of the present application. Figure 3 Enlarged structural diagram at point A in the middle;

[0036] Figure 5 This is a schematic cross-sectional view of the connecting rod according to an embodiment of this application;

[0037] Figure 6 This is a schematic cross-sectional view of the base structure according to an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Crossbeam; 2. Base;

[0040] 3. Reinforcing components; 301. Connecting sleeve; 302. Angled sub-beam;

[0041] 4. Cavity; 5. Cylindrical support; 6. Cross-shaped rib; 7. Slider assembly; 8. Insert plate; 9. Mounting cylinder; 10. Limiting rod; 11. Pull rod; 12. Spring No. 1; 13. Guide slider; 14. Connecting rod; 15. Side baffle; 16. Transmission plate; 17. Transmission rod; 18. Spring No. 2; 19. Spring No. 3; 20. Positioning block; 21. Auxiliary slider; 22. Limiting slider. Detailed Implementation

[0042] The following combination Figures 1 to 6 This application will be described in further detail below.

[0043] Example 1

[0044] Please refer to the following carefully. Figure 1 , Figure 2 A horizontal measuring fixture includes a crossbeam 1 and a base 2. The surface of the crossbeam 1 is provided with a reinforcing component 3. There are two bases 2, which are symmetrically arranged below the two ends of the crossbeam 1. The reinforcing component 3 includes a connecting sleeve 301 sleeved on the surface of the crossbeam 1. There are several connecting sleeves 301 equidistantly sleeved on the surface of the crossbeam 1. An inclined sub-beam 302 is fixedly installed between the several connecting sleeves 301. The inclined sub-beams 302 installed on both sides of the connecting sleeve 301 located in the middle of the crossbeam 1 are arranged in an arch shape, and the several inclined sub-beams 302 are distributed in a wave shape between the several connecting sleeves 301. The inclined sub-beams 302 are rigid rods, and their two ends are fixedly connected to two adjacent connecting sleeves 301. Specifically, an inclined sub-beam 302 is installed between every two adjacent connecting sleeves 301.

[0045] Furthermore, this arched design connects with the inclined secondary beams 302 in other locations to form a wavy network of reinforcing ribs distributed along the surface of the crossbeam 1. This effectively distributes the load (especially the load in the middle) to multiple support points and significantly improves the bending resistance of the crossbeam 1, minimizing the deformation of the crossbeam 1 due to gravity and improving measurement accuracy.

[0046] Please see Figure 2 The base 2 has a cavity 4 inside, and a cylindrical support 5 and a cross-shaped rib 6 are respectively arranged inside the cavity 4. The cross-shaped rib 6 are arranged in a circumferential array on the surface of the cylindrical support 5.

[0047] Furthermore, the cylindrical support 5 and the cross-shaped ribs 6 enhance the strength and stability of the base 2. When in use, the two bases 2 are placed on a stable foundation, and the crossbeam 1 maintains its horizontal rigidity through the reinforcing components 3. This allows for the installation of horizontal measuring instruments on the crossbeam 1 or the direct use of the upper surface of the crossbeam 1 as a reference for measurement operations. Its simple structure and high rigidity make it suitable for measurement applications requiring long-distance horizontal references.

[0048] Please see Figure 1 , Figure 2 The base 2 is equipped with a slider assembly 7 at its bottom. The base 2 is slidably connected to the slide rail of the external machine tool through the slider assembly 7. The cavity 4 is filled with sound insulation material, which can be any one of sound insulation cotton, polyurethane foam or glass wool.

[0049] Furthermore, by using sound-insulating materials, noise reduction can be achieved when the base 2 slides on the external machine tool.

[0050] The working principle of this embodiment is as follows:

[0051] The inclined secondary beams 302, arranged in a wave-like pattern, provide arch support for the middle part of the crossbeam 1, minimizing the deformation of the crossbeam 1 under gravity at that point and improving measurement accuracy. At the same time, the opening of the cavity 4 reduces the overall weight of the base 2. The cylindrical support 5 and the cross-shaped ribs 6 provide excellent radial and torsional stiffness. The cross-shaped ribs surrounding it can evenly and efficiently distribute concentrated loads from above (such as forces transmitted from the beam) to the entire bottom surface of the base 2, ensuring its strength and stability while reducing the weight of the base 2.

[0052] Example 2

[0053] Compared with Embodiment 1, another implementation of this application is as follows:

[0054] Please see Figure 2 , Figure 3Among the several connecting sleeves 301, two adjacent to the base 2 are provided with a docking mechanism to achieve a stable and detachable connection between the crossbeam 1 and the base 2. The docking mechanism includes two symmetrically opened sockets on the upper surface of the base 2 and extending into the cavity 4. The lower surfaces of the two connecting sleeves 301 at the ends of the crossbeam 1 are fixedly connected to the sockets with insert plates 8 extending into the cavity 4. The inner front wall and inner rear wall of the cavity 4 are fixedly installed with mounting cylinders 9. The mounting cylinders 9 are provided with limiting rods 10 inside. The front and back of the insert plates 8 are provided with slots that are adapted to the limiting rods 10. The limiting rods 10 are engaged with the slots. Through the insertion and engagement of the insert plates 8 and the sockets, combined with the pin-type locking of the limiting rods 10, a docking mechanism with a simple structure, convenient assembly and disassembly, and stable connection is formed.

[0055] Furthermore, by setting the limiting rod 10 and the insert plate 8, when the connecting sleeve 301 is placed above the base 2, the limiting rod 10 can be inserted into the slot of the insert plate 8 to fix the connecting sleeve 301 above the base 2.

[0056] Please see Figure 3 The base 2 has sliding holes on both the front and back sides that extend into the mounting cylinder 9. The end of the limiting rod 10 away from the insert plate 8 is fixedly connected to a pull rod 11 through the sliding hole. A first spring 12 is sleeved on the surface of the pull rod 11. The two ends of the first spring 12 are fixedly connected to the inner wall of the mounting cylinder 9 and the end of the limiting rod 10, respectively.

[0057] Furthermore, the pull rod 11 can pull the limiting rod 10 back into the mounting cylinder 9, separating it from the insert plate 8 and releasing the restriction. The first spring 12 can push the limiting rod 10 out of the mounting cylinder 9, making it snap into the insert plate 8, thus facilitating its docking with the tooling.

[0058] Please see Figure 3 The upper and lower surfaces of the limiting rod 10 are provided with guide sliders 13, and the inner top and bottom walls of the mounting cylinder 9 are provided with guide grooves for the guide sliders 13 to slide.

[0059] Furthermore, by setting the guide slider 13, the limiting rod 10 can smoothly slide in a directional manner with the mounting cylinder 9.

[0060] Please see Figure 5 , Figure 6The upper surface of the base 2 has four sliding slots, which are divided into two groups of two. The interior of each group of two sliding slots is slidably connected to a connecting rod 14. The upper end of each group of two connecting rods 14 is fixedly installed with a side baffle 15. The surface of the side baffle 15 has four screw holes arranged in a rectangular array. The cavity 4 is equipped with a transmission plate 16. The lower end of each group of connecting rods 14 and the surface of the transmission plate 16 are provided with grooves. The interior of the grooves is hinged to a transmission rod 17 via a rotating shaft.

[0061] Furthermore, by setting up the transmission plate 16, transmission rod 17 and side baffle 15, the transmission plate 16 can be pushed down when the insert plate 8 is inserted into the socket. The downward movement of the transmission plate 16 drives the two side baffles 15 to abut against the surface of the connecting sleeve 301 through the two sets of transmission rods 17 and the two sets of connecting rods 14, so as to facilitate the installation of bolts in the screw holes and provide convenience for its assembly work.

[0062] Please see Figure 5 , Figure 6 The inner wall of the sliding bar opening is provided with an installation groove, and a second spring 18 is fixedly installed on the inner wall of the installation groove. The end of the second spring 18 away from the inner wall of the installation groove is fixedly connected to the surface of the connecting rod 14. A limit slider 22 is provided on the surface of the connecting rod 14. A limit groove is provided on the inner wall of the sliding bar opening for the limit slider 22 to slide. Under the guidance of the limit slider 22, the connecting rod 14 can slide in a directional manner within the sliding bar opening.

[0063] Furthermore, the second spring 18 is designed so that when the insert plate 8 moves upward within the insertion port, without the pressure of the insert plate 8, the second spring 18 pushes the connecting rod 14 to move and reset, so that the side baffle 15 separates from the connecting sleeve 301, making disassembly easier.

[0064] Please see Figure 3 , Figure 4 The two side baffles 15 have grooves on their opposite sides. A No. 3 spring 19 is fixedly installed on the inner wall of the groove. A positioning block 20 is fixedly installed on the end of the No. 3 spring 19 away from the inner wall of the groove. The front and back of the connecting sleeve 301 are provided with slots that match the positioning block 20. The positioning block 20 is engaged with the slots on the surface of the connecting sleeve 301.

[0065] Furthermore, through the setting of the positioning block 20 and the slot, when the side baffle 15 abuts against the connecting sleeve 301, the positioning block 20 is inserted into the slot and locked. This structure can effectively prevent the crossbeam 1 and the connecting sleeve 301 from accidentally sliding or displacing during subsequent bolt installation, improving the convenience and accuracy of assembly, and also providing assistance for precise alignment between multiple components.

[0066] Please see Figure 4The upper and lower surfaces of the positioning block 20 are provided with sliding blocks 21, and the inner top wall and inner top wall of the groove are provided with sliding grooves for the sliding blocks 21 to slide.

[0067] Furthermore, with the aiding action of the slider 21, the positioning block 20 can smoothly slide in the groove.

[0068] The working principle of this embodiment is as follows:

[0069] During assembly, firstly, the insert plate 8 at the lower end of the connecting sleeve 301 is aligned and inserted into the reserved slot on the upper surface of the base 2. At this time, the crossbeam 1 is supported between the two bases 2 by the connecting sleeve 301, completing the initial positioning. During the insertion of the insert plate 8, the lower end of the insert plate 8 contacts the transmission plate 16 and drives it to move downward. During this period, the first spring 12 located inside the mounting cylinder 9 is in a compressed and stored state. When the insert plate 8 is in place, the first spring 12 releases its elastic force, pushing the limiting insert rod 10 outward from the mounting cylinder 9, so that its front end is embedded in the slot on the side of the insert plate 8, locking the insert plate 8 and preventing it from falling out, thereby firmly connecting the connecting sleeve 301 and the crossbeam 1 into one unit. At the same time, the insertion of the insert plate 8 pushes the transmission plate 16 downward. The downward movement of the transmission plate 16 drives the two side baffles 15 to move closer together through two sets of transmission rods 17 and two sets of connecting rods 14, until the two side baffles 15 move closer together. Plate 15 abuts against both sides of crossbeam 1, so that the positioning blocks 20 on the opposite sides of the two side baffles 15 are inserted into the slots on the surface of the connecting sleeve 301, clamping the connecting sleeve 301 above the base 2, achieving a pre-fixing effect. Then, the bolts are installed in the screw holes to complete the overall installation, which greatly reduces the use of manual adjustment and auxiliary tools, and improves the efficiency and reliability of assembly. (When disassembling, pull the pull rod 11 to drive the limit plug 10 to retract into the mounting cylinder 9, so that the limit plug 10 is separated from the slot of the plug plate 8. At this time, without the restriction of the limit plug 10, the second spring 18 releases its elastic force to push the connecting rod 14 to slide back in the sliding bar. The movement and reset of the connecting rod 14 causes the side baffles 15 to separate from the side of the connecting sleeve 301, and drives the transmission plate 16 to move upward through the transmission rod 17. The upward movement of the transmission plate 16 pushes the plug plate 8 out of the cavity 4, thus completing the disassembly work.)

Claims

1. A horizontal measuring fixture, characterized in that: It includes a crossbeam (1) and a base (2). The surface of the crossbeam (1) is provided with a reinforcing component (3). There are two bases (2), which are symmetrically arranged below the two ends of the crossbeam (1). The reinforcing component (3) includes a connecting sleeve (301) fitted onto the surface of the crossbeam (1). There are several connecting sleeves (301), which are equidistantly fitted onto the surface of the crossbeam (1). An inclined sub-beam (302) is fixedly installed between the several connecting sleeves (301). The inclined sub-beams (302) installed on both sides of the connecting sleeve (301) located in the middle of the crossbeam (1) are arranged in an arch shape, and the several inclined sub-beams (302) are distributed in a wave shape between the several connecting sleeves (301).

2. The horizontal measuring fixture according to claim 1, characterized in that, The base (2) has a cavity (4) inside, and a cylindrical support (5) and a cross-shaped rib (6) are respectively arranged inside the cavity (4). The cross-shaped rib (6) is arranged in a circumferential array on the surface of the cylindrical support (5).

3. The horizontal measuring fixture according to claim 2, characterized in that, The base (2) is provided with a slider assembly (7) at its bottom. The base (2) is slidably connected to the slide rail of the external machine tool through the slider assembly (7). The cavity (4) is filled with sound insulation material, which is any one of sound insulation cotton, polyurethane foam or glass wool.

4. A horizontal measuring fixture according to claim 2, characterized in that, Among the several connecting sleeves (301), two adjacent to the base (2) are provided with a docking mechanism. The docking mechanism includes two symmetrically opened on the upper surface of the base (2) and extending into the cavity (4). The lower surfaces of the two connecting sleeves (301) located at the end of the crossbeam (1) are fixedly connected to the insert plates (8) extending into the cavity (4) through the inserts. The inner front wall and inner rear wall of the cavity (4) are fixedly installed with mounting cylinders (9). The inside of the mounting cylinder (9) is provided with a limiting insert rod (10). The front and back of the insert plate (8) are provided with slots that are compatible with the limiting insert rod (10). The limiting insert rod (10) is engaged with the slot.

5. A horizontal measuring fixture according to claim 4, characterized in that, The base (2) has sliding holes on both the front and back sides that extend into the mounting cylinder (9). The end of the limiting rod (10) away from the insert plate (8) is fixedly connected to a pull rod (11) through the sliding hole. A first spring (12) is sleeved on the surface of the pull rod (11). The two ends of the first spring (12) are fixedly connected to the inner wall of the mounting cylinder (9) and the end of the limiting rod (10), respectively.

6. A horizontal measuring fixture according to claim 4, characterized in that, The upper and lower surfaces of the limiting rod (10) are provided with guide blocks (13), and the inner top and bottom walls of the mounting cylinder (9) are provided with guide grooves for the guide blocks (13) to slide.

7. A horizontal measuring fixture according to claim 4, characterized in that, The upper surface of the base (2) is provided with four sliding slots. The four sliding slots are divided into two groups of two. The interior of each group of sliding slots is slidably connected with a connecting rod (14). The upper end of each group of connecting rods (14) is fixedly installed with a side baffle (15). The surface of the side baffle (15) is provided with a screw hole. The interior of the cavity (4) is provided with a transmission plate (16). The lower end of each group of connecting rods (14) and the surface of the transmission plate (16) are provided with a groove. The interior of the groove is hinged with a transmission rod (17) through a rotating shaft.

8. A horizontal measuring fixture according to claim 7, characterized in that, The inner wall of the sliding bar opening is provided with an installation groove, and a second spring (18) is fixedly installed on the inner wall of the installation groove. The end of the second spring (18) away from the inner wall of the installation groove is fixedly connected to the surface of the connecting rod (14). A limit slider (22) is provided on the surface of the connecting rod (14), and a limit groove for the limit slider (22) to slide is provided on the inner wall of the sliding bar opening.

9. A horizontal measuring fixture according to claim 7, characterized in that, The two side baffles (15) are provided with grooves on their opposite surfaces. A No. 3 spring (19) is fixedly installed on the inner wall of the groove. A positioning plug (20) is fixedly installed on the end of the No. 3 spring (19) away from the inner wall of the groove. The front and back of the connecting sleeve (301) are provided with slots that match the positioning plug (20). The positioning plug (20) engages with the slots on the surface of the connecting sleeve (301).

10. A horizontal measuring fixture according to claim 9, characterized in that, The upper and lower surfaces of the positioning block (20) are provided with sliding blocks (21), and the inner top wall and inner top wall of the groove are provided with sliding grooves for the sliding blocks (21) to slide.

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