Baffle seat compression clamp
By designing a baffle seat compression fixture with a ball head seat and a lower ball head pressure plate structure, the problems of bulky fixtures and heavy operating burden in the existing technology are solved, and lightweight, efficient and accurate compression testing is achieved.
Patent Information
- Application Number
- CN202422883808.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The existing baffle seat compression fixture is bulky and difficult to carry. Multiple operations increase the burden on operators, making it difficult to achieve lightweight and excellent test performance.
A baffle seat compression fixture is designed, which adopts a ball head seat and a lower ball head pressure plate structure. Installation or disassembly is achieved through a connecting rod, and is equipped with a leveling mechanism and a micrometer for precise adjustment to reduce the operating burden.
The fixture is made lighter, the burden on operators is reduced, the accuracy and efficiency of testing are improved, and the processing requirements of different workpieces are met.
Smart Images

Figure CN223419369U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to baffle seat compression fixture technical field, specifically relates to a baffle seat compression fixture. BACKGROUND
[0002] With the continuous improvement of national railway technology, the use of railway fasteners is more and more extensive, and higher and higher requirements are put forward for the performance of railway fastener materials. The railway fastener structure will deform and displace after being subjected to long-term vibration, and the part that cannot recover after the vibration ends is the residual deformation or permanent deformation. The residual deformation depends on the dynamic performance of the structure itself and the site conditions. The residual deformation can provide information for material defect evaluation and is also an indicator for selecting reasonable materials.
[0003] The baffle seat compression fixture on the market is heavy and difficult to carry according to the standard, and multiple operations increase the burden on the operator. It is important to make the fixture lighter and have excellent test performance. UTILITY MODEL CONTENTS
[0004] In view of the deficiencies of the prior art, the utility model provides a baffle seat compression fixture, which places the baffle seat on the lower ball head pressure disc, and the upper pressure head fixes the baffle seat, and the lower ball head pressure disc rod body and the upper pressure head are both installed or disassembled through the connecting rod, so that it is more portable and reduces the operator's operating burden, solving the problem that the baffle seat compression fixture on the market is heavy and difficult to carry according to the standard, and multiple operations increase the burden on the operator.
[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a baffle seat compression fixture, comprising a ball head seat, a lower ball head pressure disc is arranged on the ball head seat, an upper pressure head is arranged above the lower ball head pressure disc, a leveling mechanism is arranged between the ball head seat and the lower ball head pressure disc, first mounting brackets are arranged on both sides of the upper pressure head, a micrometer is arranged on the first mounting bracket, second mounting brackets are arranged on both sides of the lower ball head pressure disc, a fixed rod is arranged on the second mounting bracket, and the stylus of the micrometer is in contact with the top of the fixed rod.
[0006] Preferably, the leveling mechanism comprises a semispherical groove arranged on the ball head seat, a plurality of equidistant threaded holes are arranged around the semispherical groove, and the leveling mechanism further comprises a semispherical head arranged at the bottom of the lower ball head pressure disc and matched with the semispherical groove, a plurality of equidistant positioning holes are arranged around the semispherical head, each positioning hole is arranged in correspondence with a threaded hole, and all corresponding positioning holes and threaded holes are fastened by adjusting bolts.
[0007] Preferably, the upper pressure head comprises an upper connecting rod, an upper locking nut is sleeved on the rod body of the upper connecting rod, a fixed block is connected to the bottom of the upper connecting rod, and a cylindrical pressure head is connected to the bottom of the fixed block.
[0008] Preferably, the ball head seat includes a lower connecting rod, a lower locking nut is sleeved on the rod body of the lower connecting rod, a fixing plate is connected to the top of the lower connecting rod, and the hemispherical groove and the threaded hole are both provided on the fixing plate.
[0009] Preferably, the first mounting bracket is mounted on both sides of the fixed block by bolts, a hole for the feeler pin of the dial indicator is opened on the first mounting bracket, a first locking bolt is provided on the outer side of the first mounting bracket, and the top of the first locking bolt contacts the feeler pin rod of the dial indicator.
[0010] Preferably, the second mounting bracket is installed on both sides of the lower ball head pressure plate by bolts, and a hole is provided on the second mounting bracket for the fixing rod to pass through. A second locking bolt is provided on the outer side of the second mounting bracket, and the top of the second locking bolt is in contact with the rod body of the fixing rod.
[0011] Preferably, the upper surface of the lower ball head pressure plate is provided with anti-slip grooves.
[0012] Preferably, the ball head seat, the lower ball head pressure plate, the upper pressure head, the first mounting bracket and the second mounting bracket are all made of metal.
[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0014] 1. The utility model proposes a baffle seat compression clamp, which places the baffle seat on the lower ball head pressure plate, and the upper pressure head fixes the baffle seat. The lower ball head pressure plate rod body and the upper pressure head can be installed or disassembled through the connecting rod, making it lighter and reducing the operating burden of the operator.
[0015] 2. The flatness of the lower ball head pressure plate can be adjusted through the leveling mechanism and the dial indicator adjustment structure on both sides, making the data results more accurate when compressing the baffle seat.
[0016] Additional aspects and advantages of the present invention will be given in the following description, and some will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a baffle seat compression fixture.
[0018] Figure 2 A front view of a baffle seat compression fixture.
[0019] Figure 3 A cross-sectional view of a baffle seat compression fixture.
[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the upper pressure head of a baffle seat compression fixture.
[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the lower ball head pressure plate of a baffle seat compression fixture.
[0022] Figure 6 This is a three-dimensional exploded view of the lower ball head pressure plate of a baffle seat compression fixture.
[0023] In the figure: 1. Ball head seat; 11. Hemispherical groove; 12. Threaded hole; 13. Lower connecting rod; 14. Lower locking nut; 15. Fixed plate; 2. Lower ball head pressure plate; 21. Hemispherical head; 22. Positioning hole; 3. Upper pressure head; 31. Upper connecting rod; 32. Upper locking nut; 33. Fixed block; 34. Cylindrical pressure head; 4. Leveling mechanism; 5. First mounting bracket; 51. First locking bolt; 6. Micrometer; 7. Second mounting bracket; 71. Second locking bolt; 8. Fixed rod. DETAILED DESCRIPTION
[0024] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are intended to illustrate the present invention but are not intended to limit the scope of the present invention. All other embodiments obtained by persons of ordinary skill in the art without creative effort are intended to fall within the scope of protection of the present invention.
[0025] Combine Figure 1 、 Figure 2 、 Figure 3 and Figure 6 As shown, a baffle seat compression clamp includes a ball head seat 1, a lower ball head pressure plate 2 is provided on the ball head seat 1, an upper pressure head 3 is provided above the lower ball head pressure plate 2, a leveling mechanism 4 is provided between the ball head seat 1 and the lower ball head pressure plate 2, a first mounting bracket 5 is provided on both sides of the upper pressure head 3, a micrometer 6 is provided on the first mounting bracket 5, a second mounting bracket 7 is provided on both sides of the lower ball head pressure plate 2, a fixing rod 8 is provided on the second mounting bracket 7, and the contact pin of the micrometer 6 is in contact with the top of the fixing rod 8.
[0026] This utility model proposes a baffle seat compression fixture, primarily used for precisely compressing, securing, and measuring ball head components. The fixture primarily comprises a ball head seat 1 as its core support component, constructed from high-strength materials to ensure sufficient stability and durability during compression operations. A lower ball head pressure plate 2 is designed above the ball head seat 1, directly contacting the workpiece being compressed and achieving effective compression through precise pressure transmission. The surface of the lower ball head pressure plate 2 is specially treated to reduce friction and protect the workpiece from damage.
[0027] In order to realize the precise control of the lower ball head pressure disc 2, the upper pressure head 3 is arranged directly above the lower ball head pressure disc 2. The upper pressure head 3 is also made of high-quality materials and is equipped with a precise adjusting mechanism, so that the operator can adjust the compression degree according to the actual needs, so as to meet the processing needs of different workpieces.
[0028] In order to further improve the flexibility and adaptability of the clamp, a leveling mechanism 4 is specially arranged between the ball head seat 1 and the lower ball head pressure disc 2. The horizontal position of the lower ball head pressure disc 2 can be automatically or manually adjusted to ensure that it remains stable during compression and avoids uneven compression caused by inclination.
[0029] In order to monitor and adjust the pressure change in real time during compression, first mounting brackets 5 are installed on both sides of the upper pressure head 3. These first mounting brackets 5 not only support the upper pressure head 3, but also provide an accurate installation position for the micrometer 6 on it. The micrometer 6, as a high-precision measuring tool, has its stylus in contact with the top of the fixed rod 8 arranged on the second mounting bracket 7 on both sides of the lower ball head pressure disc 2. As the compression process proceeds, the micrometer 6 can accurately measure and display the change of compression force, providing timely and accurate feedback to the operator.
[0030] The design of the fixed rod 8 is also exquisite, not only as a measurement reference for the micrometer 6, but also fixed on the lower ball head pressure disc 2 through the second mounting bracket 7, to ensure that there is no displacement or deformation during compression. Not only does it improve the accuracy of measurement, but also enhances the overall stability of the clamp.
[0031] This baffle seat compression clamp realizes efficient and accurate compression of workpieces through reasonable structural design and precise component matching, providing strong support for industrial production and processing.
[0032] In combination with Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 , the leveling mechanism 4 includes a semispherical recess 11 arranged on the ball head seat 1, and a plurality of equidistant threaded holes 12 are arranged around the semispherical recess 11; it also includes a semispherical head 21 arranged at the bottom of the lower ball head pressure disc 2 and matched with the semispherical recess 11, and a plurality of equidistant positioning holes 22 are arranged around the semispherical head 21, each positioning hole 22 is correspondingly arranged with a threaded hole 12, and all corresponding positioning holes 22 and threaded holes 12 are fastened by adjusting bolts.
[0033] Specifically, the leveling mechanism 4 ensures precise horizontal adjustment of the lower ball-head pressure plate 2 relative to the ball-head seat 1, thereby ensuring stability and accuracy during compression. The leveling mechanism 4 primarily consists of a hemispherical recess 11 on the ball-head seat 1 and a hemispherical head 21 at the bottom of the lower ball-head pressure plate 2. The design of the hemispherical recess 11 and the hemispherical head 21 allows for a coordinated fit, providing a stable foundation for leveling.
[0034] The design of the hemispherical groove 11 is very clever. It can not only accommodate the hemispherical head 21, but also realize the adjustment function through several equally spaced threaded holes 12 around it. These threaded holes 12 are evenly distributed around the periphery of the hemispherical groove 11, providing an accurate installation position for the adjustment bolt.
[0035] The hemispherical head 21 at the bottom of the lower ball head pressure plate 2 matches the hemispherical groove 11, ensuring contact between the two. The periphery of the hemispherical head 21 is also designed with several equidistant positioning holes 22. These positioning holes 22 correspond one-to-one with the threaded holes 12, providing convenient insertion and tightening of the adjusting bolts.
[0036] During the leveling process, the operator can fine-tune the lower ball head pressure plate 2 by inserting the adjusting bolts into the corresponding positioning holes 22 and threaded holes 12 and rotating the adjusting bolts. Since the threaded holes 12 and positioning holes 22 are equidistantly distributed, the operator can select adjusting bolts in different positions as needed to achieve the best leveling effect.
[0037] Furthermore, the design of the adjustment bolts takes into account both precision and stability in leveling. They are typically made of high-strength materials and feature precision threading to ensure consistent tightening force during adjustment. Furthermore, the head of the adjustment bolts is designed with a convenient shape and size, making adjustments easy for the operator.
[0038] The leveling mechanism 4 achieves precise leveling of the lower ball head pressure plate 2 through the precise coordination of components such as the hemispherical groove 11, the hemispherical head 21, the positioning hole 22 and the threaded hole 12 and the flexible use of the adjusting bolts, providing a strong guarantee for the stability and accuracy of the baffle seat compression clamp.
[0039] Combine Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the upper pressure head 3 includes an upper connecting rod 31 , an upper locking nut 32 is sleeved on the rod body of the upper connecting rod 31 , a fixing block 33 is connected to the bottom of the upper connecting rod 31 , and a cylindrical pressure head 34 is connected to the bottom of the fixing block 33 .
[0040] Combine Figure 1 、 Figure 2 、 Figure 3、 Figure 5 and Figure 6 As shown, the ball head seat 1 includes a lower connecting rod 13, a lower locking nut 14 is sleeved on the rod body of the lower connecting rod 13, a fixing plate 15 is connected to the top of the lower connecting rod 13, and the hemispherical groove 11 and the threaded hole 12 are both provided on the fixing plate 15.
[0041] Specifically, the upper pressing head 3 and the ball head seat 1 are important components of the baffle seat compression fixture and have a crucial impact on the performance and efficiency of the entire fixture.
[0042] The upper pressure head 3 is mainly composed of an upper connecting rod 31, an upper locking nut 32, a fixed block 33 and a cylindrical pressure head 34. The upper connecting rod 31 is usually made of high-strength material to ensure that it can withstand greater pressure and impact force during the compression process. Its rod body is designed with a suitable diameter and length to meet the needs of different compression operations. The upper locking nut 32 is sleeved on the rod body of the upper connecting rod 31 and is used to fasten the upper pressure head 3 with other components (such as the first mounting bracket 5). By rotating the upper locking nut 32, the height and position of the upper pressure head 3 can be adjusted to adapt to the compression requirements of different workpieces. The fixed block 33 is connected to the bottom of the upper connecting rod 31 and is used to support and fix the cylindrical pressure head 34. The fixed block 33 is usually made of rigid material to ensure that a stable structure can be maintained during the compression process. The cylindrical pressure head 34 is the part of the upper pressure head 3 that is in direct contact with the compressed workpiece, and its shape and size are usually designed according to the shape of the workpiece and the compression requirements. The surface of the cylindrical pressure head 34 is specially treated to reduce friction and wear and improve compression efficiency.
[0043] The ball head seat 1 is mainly composed of components such as a lower connecting rod 13, a lower locking nut 14, a fixed plate 15, a hemispherical groove 11 and a threaded hole 12. The lower connecting rod 13 is also made of high-strength material to ensure that it can withstand greater pressure and impact during the compression process. Its rod body is designed with a suitable diameter and length to meet the needs of different compression operations. The lower locking nut 14 is sleeved on the rod body of the lower connecting rod 13 and is used to fasten the ball head seat 1 to other components (such as the fixture base). By rotating the lower locking nut 14, the height and position of the ball head seat 1 can be adjusted to meet the compression requirements of different workpieces. The fixed plate 15 is connected to the top of the lower connecting rod 13 and is used to support components such as the hemispherical groove 11 and the threaded hole 12. The fixed plate 15 is usually made of rigid material to ensure that a stable structure can be maintained during the compression process. The hemispherical groove 11 is set on the fixed plate 15 for matching and leveling with the hemispherical head 21 of the lower ball head pressure plate 2. Its shape and dimensions are precisely designed to ensure a tight fit and stable contact with the hemispherical head 21. Threaded holes 12 are evenly distributed around the periphery of the hemispherical recess 11 for mounting adjustment bolts. By rotating the adjustment bolts, the lower ball head pressure plate 2 can be fine-tuned to achieve optimal leveling.
[0044] Combine Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the first mounting bracket 5 is mounted on both sides of the fixed block 33 by bolts. A hole for the contact pin of the micrometer 6 to pass through is provided on the first mounting bracket 5. A first locking bolt 51 is provided on the outer side of the first mounting bracket 5. The top of the first locking bolt 51 contacts the contact pin rod of the micrometer 6.
[0045] Combine Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the second mounting bracket 7 is installed on both sides of the lower ball head pressure plate 2 by bolts. A hole is opened on the second mounting bracket 7 for the rod body of the fixing rod 8 to pass through. A second locking bolt 71 is provided on the outer side of the second mounting bracket 7, and the top of the second locking bolt 71 is in contact with the rod body of the fixing rod 8.
[0046] Specifically, the first mounting bracket 5 and the second mounting bracket 7 not only provide a stable mounting platform for the dial gauge 6 and the fixing rod 8, but also ensure measurement accuracy and ease of operation through sophisticated design. The first mounting bracket 5 is securely bolted to both sides of the fixing block 33, ensuring that the upper pressure head 3 remains stable during the compression process while allowing the dial gauge 6 to perform precise measurements.
[0047] Each first mounting bracket 5 has a hole, the size and shape of which are precisely calculated to ensure smooth passage of the stylus of the dial gauge 6 and maintain stable contact during measurement. This not only improves measurement accuracy but also avoids errors caused by friction between the stylus and the bracket.
[0048] To further enhance the stability of the dial indicator 6, a first locking bolt 51 is provided on the outside of the first mounting bracket 5. The top of this bolt tightly contacts the stylus of the dial indicator 6. Rotating the bolt adjusts the pressure on the stylus, ensuring stable contact during measurement. This not only improves measurement accuracy but also extends the service life of the dial indicator.
[0049] Similar to the first mounting bracket 5, the second mounting bracket 7 is also bolted on both sides of the lower ball head platen 2. This ensures that the lower ball head platen 2 remains stable during compression, while allowing the fixed rod 8 to be accurately positioned and supported. On each second mounting bracket 7, a hole is drilled, which is precisely calculated in size and shape to ensure that the rod body of the fixed rod 8 can pass through smoothly and maintain stable support during compression. Not only does this improve the stability of the clamp, but it also avoids errors caused by friction between the fixed rod and the bracket.
[0050] To further enhance the stability of the fixed rod 8, the outer side of the second mounting bracket 7 is specially provided with a second locking bolt 71. The top of this bolt is in close contact with the rod body of the fixed rod 8, and by rotating the bolt, the pressure on the fixed rod 8 can be adjusted, ensuring that the fixed rod 8 always maintains a stable support state during compression. Not only does this improve the accuracy of the clamp, but it also ensures the safety and reliability of the compression operation.
[0051] In combination with Figure 1 , Figure 2 , Figure 3 and Figure 5 , the upper surface of the lower ball head platen 2 is provided with anti-slip patterns.
[0052] Furthermore, the anti-slip patterns on the upper surface of the lower ball head platen 2 not only enhance the friction between it and the compressed workpiece, but also improve the safety and efficiency of the compression operation. Anti-slip patterns are usually formed on the upper surface of the lower ball head platen 2 using precise mechanical processing or laser engraving techniques. These patterns can be regular geometric shapes such as circles, squares, or diamonds, or they can be random, similar to natural textures. Regardless of the shape or pattern used, the main purpose of the anti-slip patterns is to increase the contact area and friction between the lower ball head platen 2 and the compressed workpiece, thereby preventing the workpiece from sliding or shifting during compression.
[0053] Anti-slip patterns can significantly increase the friction between the lower ball head platen 2 and the compressed workpiece, making the workpiece more stable during compression and less likely to slide or shift. This helps ensure the accuracy and consistency of the compression operation. Anti-slip patterns can ensure that the workpiece maintains the correct position during compression, thereby avoiding repeated compression and adjustment due to workpiece movement. This helps improve the efficiency and productivity of the compression operation. Anti-slip patterns take into account the differences in friction coefficients between different materials. By adjusting the shape, depth, and density of the patterns, they can adapt to different materials and shapes of workpieces, ensuring that they all remain stable during compression.
[0054] In combination with Figure 1 , Figure 2 , Figure 3 , Figure 4and Figure 5 As shown, the ball head seat 1, the lower ball head pressure plate 2, the upper pressure head 3, the first mounting bracket 5 and the second mounting bracket 7 are all made of metal.
[0055] Specifically, the ball seat 1, lower ball plate 2, upper pressure head 3, first mounting bracket 5, and second mounting bracket 7 are the core components of the baffle seat compression fixture. The material selection is crucial to ensuring the fixture's durability, stability, and precision. These components are all made of metal, a choice based on a comprehensive consideration of multiple factors.
[0056] Metal offers exceptional strength and durability, capable of withstanding high-load compression without deformation or damage. This is crucial for ensuring the stability and reliability of fixtures over long periods of use. Metal also readily undergoes precision machining and surface treatments, such as drilling, milling, grinding, and electroplating. This allows these components to be manufactured to exacting design requirements, ensuring dimensional accuracy and consistent shape. Many metals, such as stainless steel and alloy steels, offer excellent resistance to corrosion and oxidation. This means these components can maintain their performance and appearance in harsh industrial environments, extending their service life. Metal is also recyclable, aligning with the concept of sustainable development. At the end of a fixture's lifespan, these components can be recycled and reused, reducing resource waste and environmental pollution.
[0057] The present invention is a preferred specific implementation method, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A baffle seat compression fixture, comprising a ball head seat (1), a lower ball head pressure plate (2) provided on the ball head seat (1), an upper pressure head (3) provided above the lower ball head pressure plate (2), characterized in that: A leveling mechanism (4) is provided between the ball head seat (1) and the lower ball head pressure plate (2); first mounting brackets (5) are provided on both sides of the upper pressure head (3); a dial indicator (6) is provided on the first mounting bracket (5); second mounting brackets (7) are provided on both sides of the lower ball head pressure plate (2); a fixing rod (8) is provided on the second mounting bracket (7); and a contact pin of the dial indicator (6) contacts the top of the fixing rod (8).
2. A baffle seat compression fixture according to claim 1, characterized in that: The leveling mechanism (4) includes a hemispherical groove (11) provided on the ball head seat (1), and a plurality of equidistant threaded holes (12) are provided around the hemispherical groove (11); The invention also includes a hemispherical head (21) arranged at the bottom of the lower ball head pressure plate (2) and matching the hemispherical groove (11). A plurality of equidistant positioning holes (22) are arranged around the hemispherical head (21). Each positioning hole (22) is arranged corresponding to the threaded hole (12). All corresponding positioning holes (22) and threaded holes (12) are fastened together by adjusting bolts.
3. The baffle seat compression fixture according to claim 1, characterized in that: The upper pressure head (3) comprises an upper connecting rod (31), an upper locking nut (32) is sleeved on the rod body of the upper connecting rod (31), a fixing block (33) is connected to the bottom of the upper connecting rod (31), and a cylindrical pressure head (34) is connected to the bottom of the fixing block (33).
4. The baffle seat compression fixture according to claim 2, characterized in that: The ball head seat (1) comprises a lower connecting rod (13), a lower locking nut (14) is sleeved on the rod body of the lower connecting rod (13), a fixing plate (15) is connected to the top of the lower connecting rod (13), and the hemispherical groove (11) and the threaded hole (12) are both arranged on the fixing plate (15).
5. The baffle seat compression fixture according to claim 3, characterized in that: The first mounting bracket (5) is mounted on both sides of the fixed block (33) by means of bolts. A hole for the contact pin of the dial gauge (6) to pass through is provided on the first mounting bracket (5). A first locking bolt (51) is provided on the outer side of the first mounting bracket (5). The top of the first locking bolt (51) contacts the contact pin rod of the dial gauge (6).
6. The baffle seat compression fixture according to claim 1, characterized in that: The second mounting bracket (7) is mounted on both sides of the lower ball head pressure plate (2) by means of bolts. A hole is provided on the second mounting bracket (7) for the rod body of the fixing rod (8) to pass through. A second locking bolt (71) is provided on the outer side of the second mounting bracket (7). The top of the second locking bolt (71) contacts the rod body of the fixing rod (8).
7. The baffle seat compression fixture according to claim 6, characterized in that: The upper surface of the lower ball head pressure plate (2) is provided with anti-skid patterns.
8. A baffle seat compression fixture according to any one of claims 1 to 7, characterized in that: The ball head seat (1), the lower ball head pressure plate (2), the upper pressure head (3), the first mounting bracket (5) and the second mounting bracket (7) are all made of metal material.