Splicing unit and splicing method thereof

Abstract

The present invention belongs to the field of clamps, and discloses a splicing unit and a splicing method thereof. The splicing unit comprises a splicing body, a connecting piece and a locking piece, wherein the splicing body is provided with a first mounting hole and a second mounting hole, wherein the first mounting hole is provided at the end of the splicing body, and the second mounting hole is provided at the side of the splicing unit, and the first mounting hole and the second mounting hole are connected inside the splicing body; one end of the connecting piece is installed in the first mounting hole, and the locking piece is installed in the second mounting hole, and the locking piece cooperates with one end of the connecting piece located in the first mounting hole. The splicing unit can be quickly assembled and disassembled, saving installation time.

Description

Technical Field

[0001] The invention belongs to the field of clamps, in particular to a splicing unit and a splicing method thereof. Background Art

[0002] In machining, fixtures are basically used. Common fixtures such as vises and chucks basically play a clamping role when used, but they cannot complete the clamping function for some complex workpieces, or the clamping does not meet the requirements, so they cannot be used. Therefore, tooling fixtures are used to clamp complex workpieces, but existing tooling fixtures are often fixed and mounted through connecting rods and pressure blocks, which is cumbersome, time-consuming and labor-intensive. Summary of the invention

[0003] The purpose of the present invention is to improve the shortcomings of the prior art and provide a splicing unit and a splicing method thereof, which can realize rapid assembly and disassembly of the splicing unit and save installation time.

[0004] The technical solution is as follows:

[0005] A splicing unit comprises a splicing body, a connecting piece and a locking piece, wherein the splicing body is provided with a first mounting hole and a second mounting hole, the first mounting hole is provided at the end of the splicing body, the second mounting hole is provided at the side of the splicing body, and the first mounting hole and the second mounting hole are communicated with each other inside the splicing body; one end of the connecting piece is installed in the first mounting hole, the locking piece is installed in the second mounting hole, and the locking piece cooperates with one end of the connecting piece located in the first mounting hole.

[0006] The locking member includes a locking block and a holding block. The holding block passes through the second mounting hole and cooperates with the connecting member. The locking block cooperates with the holding block, and the locking block presses the holding block.

[0007] The second mounting hole passes through both sides of the splicing body, and the holding block includes a first pressing block and a second pressing block. The first pressing block and the second pressing block are respectively installed from the second mounting holes on both sides of the splicing body, and the locking block cooperates with the first pressing block and the second pressing block.

[0008] The locking block includes a locking nail body, and connecting holes are provided on the first pressing block and the second pressing block, and at least the inner wall of the connecting hole on the second pressing block is provided with a thread, and the locking nail body passes through the connecting holes of the first pressing block and the second pressing block and cooperates with the thread of the second pressing block.

[0009] A boss is provided on the connecting hole of the first pressing block, and the boss protrudes toward the central axis of the connecting hole. The locking nail body includes a nail head and a rod body. The rod body passes through the connecting holes of the first pressing block and the second pressing block, and the nail head is clamped on the boss of the first pressing block.

[0010] The pressing block is provided with a pressing portion, and the pressing portion is pressed and matched with the connecting piece.

[0011] The pressing portion is located above the connecting hole, or the connecting hole passes through the pressing portion.

[0012] The pressing portion is configured as a first concave-convex tooth, and the connecting member is provided with a second concave-convex tooth matched with the first concave-convex tooth.

[0013] The second concave-convex teeth of the connecting member are circumferentially arranged on the connecting member.

[0014] It also includes a limiting boss, a limiting mounting hole is provided on the splicing body, the limiting mounting hole is communicated with the second mounting hole, the limiting boss passes through the limiting mounting hole, and limits the sliding of the locking member.

[0015] The locking member is provided with a transverse groove, the direction in which the transverse groove is provided is the same as the direction of the second mounting hole, and the limiting protrusion passes through the transverse groove and contacts the side wall of the transverse groove.

[0016] The splicing body is provided with two first mounting holes and two second mounting holes, the two first mounting holes are respectively provided at the two ends of the splicing body, the two second mounting holes are both provided at the side of the splicing body, and are arranged up and down, and each of the first mounting holes and each of the second mounting holes are communicated with each other inside the splicing body.

[0017] The connecting member comprises two clamping ends, and the two clamping ends are respectively installed in the first mounting holes of the two splicing units.

[0018] The support column comprises at least two of the above-mentioned splicing units, and the splicing units are spliced ​​together through the connecting piece.

[0019] The outer contour of the side portion of the support column is in an arc shape.

[0020] The splicing unit splicing method comprises the following steps:

[0021] The connecting piece is installed on the splicing body through the first mounting hole, and the locking piece is installed on the splicing body through the second mounting hole;

[0022] The first mounting hole and the second mounting hole are connected inside the splicing body, and the connecting piece passes through the first mounting hole to the second mounting hole;

[0023] The locking piece is driven from the side of the splicing body to approach the connecting piece, and the connecting piece is pressed to complete the matching, and the connecting piece is locked on the locking piece.

[0024] The technical solution provided by the present invention has the following advantages and effects:

[0025] The locking piece is installed in the second mounting hole, the connecting piece is installed in the first mounting hole, and then the locking piece is approached to the position of the connecting piece, and the connecting piece is fixed by the locking piece close to the connecting piece, that is, the connecting piece is fixed on the splicing unit, and the connecting piece can be spliced ​​with different splicing units, and can also fix the workpiece. If it needs to be disassembled, it can be directly unlocked by unlocking the locking piece, so it is convenient to install and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings herein show specific examples of the technical solutions described in the present invention, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0027] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0028] Figure 1 is a schematic diagram of a three-dimensional structure of a clamped workpiece according to an embodiment of the present invention;

[0029] Figure 2 A schematic cross-sectional view of a clamping workpiece according to an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of the exploded structure of the base and the support column of an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the exploded structure of a support column according to an embodiment of the present invention;

[0032] Figure 5 Embodiment of the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0033] Figure 6 is a schematic diagram of a cross-sectional structure of an exploded support column according to an embodiment of the present invention;

[0034] Figure 7 is a schematic diagram of the three-dimensional structure of the first pressing block according to an embodiment of the present invention;

[0035] Figure 8 is a schematic diagram of a cross-sectional structure of a support column splicing according to an embodiment of the present invention;

[0036] Fig. 9 Embodiment of the present invention Figure 8The enlarged structural diagram at B in the middle;

[0037] Fig.10 is a perspective schematic diagram of a second structure of a locking member according to an embodiment of the present invention when it is exploded;

[0038] Fig.11 It is a cross-sectional schematic diagram of the second structure of the locking member of the embodiment of the present invention when it is spliced.

[0039] Description of reference numerals:

[0040] 10. Support column; 11. First fixed end; 12. Second fixed end; 20. Base; 30. Positioning block; 40. Splicing unit; 41. Splicing body; 411. First mounting hole; 412. Second mounting hole; 413. Positioning mounting hole; 414. Positioning groove; 42. Connecting piece; 421. Clamping end; 422. Second concave-convex tooth; 43. Locking piece; 431. Locking block; 4311. Locking nail body; 43111. Nail head; 43112. Rod body; 432. Holding block; 4321. First pressing block; 4322. Second pressing block; 4323. Holding portion; 43231. First concave-convex tooth; 4324. Transverse groove; 4325. Connecting hole; 4326. Boss; 44. Positioning boss; 50. Workpiece. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0042] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. In the case of combining the technical solution of the present invention with a realistic scenario, all technical and scientific terms used herein may also have meanings corresponding to the purpose of implementing the technical solution of the present invention.

[0043] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0044] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0046] like Figures 1 to 3 As shown, the workpiece 50 fixing device comprises a support column 10 and a base 20, wherein the support column 10 has a first fixed end 11 and a second fixed end 12, wherein the first fixed end 11 is far from the second fixed end 12, and a protruding connecting member 42 is provided on each of the first fixed end 11 and the second fixed end 12, wherein the first fixed end 11 is fixedly connected to the base 20 through the connecting member 42, and the connecting member 42 on the second fixed end 12 is provided with a thread. In actual use, a threaded hole is provided on the workpiece 50, and the support column 10 is directly connected to the threaded hole of the workpiece 50 through the thread, and then the other end of the support column 10 is fixedly installed on the base 20 through the connecting member 42 to fix the workpiece 50. Compared with the existing structure, a supporting structure is first provided, and then the workpiece 50 is placed on the supporting structure, and then the workpiece 50 is pressed downward by a pressing structure to complete the fixing. The method of fixing the workpiece 50 in this solution is simple, and cumbersome steps are eliminated, so the installation time is greatly saved, and the purpose of quick installation is achieved.

[0047] like Figure 2 As shown, the connecting member 42 on the first fixed end 11 is provided with threads, a threaded hole is provided on the base 20, and the connecting member 42 provided with threads is fixedly connected with the threaded hole on the base 20. When connecting the base 20, directly using threads is more convenient.

[0048] like Figures 3 to 8As shown, the support column 10 includes two splicing units 40, each of which includes a connecting piece 42, and the connecting piece 42 is located at one end of the main part of the splicing unit 40, and one end of one splicing unit 40 is detachably connected to one end of another splicing unit 40 through the connecting piece 42. The support column 10 is made by splicing the splicing units 40, so when different heights are required for clamping different workpieces 50, the height of the support column 10 can be made variable by splicing different numbers of splicing units 40, which has greater practicality for tooling and fixtures. Existing tooling and fixtures basically rely on supporting components with specific heights for specific workpieces 50. After processing, because the height setting is fixed, it cannot meet the requirements when processing other workpieces 50, and the supporting components set are basically not used again, so it causes great waste. Therefore, this solution utilizes the splicing of the splicing units 40 to adjust the height of the support column 10, which can be reused. According to different clamping requirements of the workpiece 50, multiple splicing units 40 can be spliced ​​to achieve support columns 10 of different heights.

[0049] The splicing unit 40 is not provided in a single specification, but in a plurality of specifications, and the splicing units 40 of different specifications or the same specifications can be spliced ​​with each other. The splicing units 40 of various specifications are provided, and the splicing units 40 of different specifications can be spliced ​​to form a plurality of support columns 10 of unequal heights, so the adaptability is further enhanced.

[0050] like Figures 4 to 9 As shown, the support column 10 includes a positioning block 30, and a positioning groove 414 is provided at both ends of each splicing unit 40. The outer contour of the positioning block 30 matches the side wall of the positioning groove 414. When two splicing units 40 are spliced, the positioning blocks 30 are respectively clamped on the positioning grooves 414 of the two splicing units 40. When multiple splicing units 40 are spliced, the coaxiality of the splicing needs to be ensured, because after the deviation occurs, it is easy to cause the offset during use, and there is an offset for the fixation of the workpiece 50. Moreover, the workpiece 50 has a clamping position prepared when clamping. If the support column 10 has a deviation, it will directly affect the fixation of the workpiece 50. Therefore, a positioning block 30 is set here, and the positioning block 30 is installed on the positioning groove 414 of one of the splicing units 40, and then the positioning groove 414 of the other splicing unit 40 is spliced ​​with the positioning block 30, so as to complete the positioning splicing of the two splicing units 40, and ensure that the two splicing units 40 have high coaxiality after splicing. Here, the connection is completed by the close contact between the contour of the positioning block 30 and the side wall of the positioning groove 414. Since the positioning block 30 is processed separately, it is easier to process compared with the integrated processing at the same processing accuracy.

[0051] Specifically, the positioning block 30 is circular in a top view, and the positioning block 30 is in close contact with the positioning groove 414, so that the central axis of the positioning block 30 is the same as the central axis of the positioning groove 414, and the two splicing units 40 have a high degree of coaxiality when spliced. The positioning block 30 is set to a cylindrical structure, and there is no need to consider the direction when installing it into the positioning groove 414. The two splicing units 40 have a high degree of coaxiality when spliced.

[0052] like Fig. 9 As shown, the positioning block 30 includes two end faces and a side face, and the diameter of the side face of the positioning block 30 gradually decreases from the middle to the two end faces of the positioning block 30. Therefore, when the positioning block 30 and the positioning groove 414 are spliced, the closer the positioning block 30 is inserted into the positioning groove 414, the tighter the fitting surface between the positioning block 30 and the groove, that is, the fitting clearance error is greatly reduced.

[0053] In other embodiments, the positioning block 30 includes a first splicing block and a second splicing block, the first splicing block is mounted on the positioning groove 414 of the first splicing unit 40, the second splicing block is mounted on the positioning groove 414 of the second splicing unit 40, and the first splicing block and the second splicing block are tightly matched. That is, a protrusion or groove structure is provided between the first splicing block and the second splicing block, and then the protrusion is used to tightly contact and match with the groove.

[0054] Specifically in this embodiment, Figure 4 As shown, the connector 42 is provided with two specifications. The first type is provided with a clamping end 421 at one end and a threaded end at the other end; the second type is provided with clamping ends 421 at both ends. In actual use, the clamping end 421 of the first connector 42 is clamped on the support column 10, and the threaded end is used to connect the workpiece 50 or the base 20; the clamping ends 421 of the second connector 42 are respectively connected to the two splicing units 40.

[0055] like Figures 3 to 9 As shown, the splicing unit 40 includes a splicing body 41, a connecting piece 42 and a locking piece 43. The splicing body 41 is provided with a first mounting hole 411 and a second mounting hole 412. The first mounting hole 411 is provided at the end of the splicing body 41, and the second mounting hole 412 is provided at the side of the splicing body 41. The first mounting hole 411 and the second mounting hole 412 are communicated with each other inside the splicing body 41; one end of the connecting piece 42 is installed in the first mounting hole 411, and the locking piece 43 is installed in the second mounting hole 412. The locking piece 43 cooperates with one end of the connecting piece 42 located in the first mounting hole 411.

[0056] Here, the locking member 43 is installed in the second mounting hole 412, and the connecting member 42 is installed on the first mounting hole 411. Then the locking member 43 approaches the position of the connecting member 42, and the connecting member 42 is fixed by the locking member 43 close to the connecting member 42, that is, the connecting member 42 is fixed on the splicing unit 40.

[0057] like Figures 4 to 6 As shown, the splicing body 41 is provided with two first mounting holes 411 and two second mounting holes 412. The two first mounting holes 411 are respectively provided at the two ends of the splicing body 41, and the two second mounting holes 412 are both provided at the side of the splicing body 41, and are arranged up and down, and each first mounting hole 411 and each second mounting hole 412 are communicated with each other inside the splicing body 41. Here, in addition to a first mounting hole 411 on the splicing body 41 that can fix a connecting piece 42, when two splicing units 40 need to be spliced, the first mounting hole 411 of one splicing unit 40 cooperates with the protruding connecting piece 42 of the other splicing unit 40, and after the preliminary splicing of the two splicing units 40 is completed, the locking piece 43 on the other splicing unit 40 fixes the connecting piece 42, so as to realize the fixed splicing of two different splicing units 40. That is, only one connecting piece 42 is required to cooperate with the two splicing bodies 41, and then the locking piece 43 on each splicing body 41 fixes the connecting piece 42.

[0058] like Figures 4 to 6 As shown, the locking member 43 includes a locking block 431 and a holding block 432. The holding block 432 passes through the second mounting hole 412 and cooperates with the connecting member 42. The locking block 431 cooperates with the holding block 432, and the locking block 431 presses the holding block 432. When locking the connecting member 42, the holding block 432 presses the connecting member 42, and there is no locking effect at this time. Then, the locking block 431 fixes the holding block 432 in position, and the locking effect of the holding block 432 on the connecting member 42 is maintained.

[0059] like Figure 6As shown, the second mounting hole 412 penetrates to both sides of the splicing body 41, and the holding block 432 includes a first pressing block 4321 and a second pressing block 4322. The first pressing block 4321 and the second pressing block 4322 are respectively installed from the second mounting holes 412 on both sides of the splicing body 41, and the locking block 431 cooperates with the first pressing block 4321 and the second pressing block 4322. At this time, the holding block 432 is configured as two movable first pressing blocks 4321 and second pressing blocks 4322. When the connecting member 42 is pressed and locked, the first pressing block 4321 and the second pressing block 4322 are pressed against the clamping connecting member 42, and then the locking block 431 is used to lock the positions of the first pressing block 4321 and the second pressing block 4322. The double-sided pressing method of the first pressing block 4321 and the second pressing block 4322 to press the connecting member 42 can ensure a stable pressing of the connecting member 42.

[0060] like Figures 6 to 9 As shown, the locking block 431 includes a locking nail body 4311, and the first pressing block 4321 and the second pressing block 4322 are both provided with connecting holes 4325, and the inner wall of the connecting hole 4325 on the second pressing block 4322 is provided with a thread, and the locking nail body 4311 passes through the connecting hole 4325 of the first pressing block 4321 and the second pressing block 4322, and cooperates with the thread of the second pressing block 4322. A boss 4326 is provided on the connecting hole 4325 of the first pressing block 4321, and the boss 4326 protrudes toward the central axis of the connecting hole 4325. The locking nail body 4311 includes a nail head 43111 and a rod body 43112. The rod body 43112 passes through the connecting holes 4325 of the first pressing block 4321 and the second pressing block 4322, and the nail head 43111 is clamped on the boss 4326 of the first pressing block 4321. When locking the first pressure block 4321 and the second pressure block 4322, the rod body 43112 of the locking nail body 4311 passes through the connecting hole 4325 of the first pressure block 4321 and the second pressure block 4322, and the nail head 43111 of the locking nail body 4311 is stuck on the boss 4326, and then the thread set on the rod body 43112 cooperates with the thread set on the second pressure block 4322, and the first pressure block 4321 and the second pressure block 4322 are tightened and loosened by screwing, so as to achieve the purpose of clamping and loosening the connecting piece 42.

[0061] The pressing block 432 is provided with a pressing portion 4323, and the pressing portion 4323 is pressed and matched with the connecting member 42. The pressing portion 4323 is provided to increase the resistance when the connecting member 42 is taken out.

[0062] Specifically, Figure 5As shown, the pressing portion 4323 is configured as a first concave-convex tooth 43231, and the clamping end 421 on the connecting member 42 is configured with a second concave-convex tooth 422 that matches the first concave-convex tooth 43231. The first concave-convex tooth 43231 and the second concave-convex tooth 422 match so that the connecting member 42 Figure 5 In the state shown, the upward force is relatively large and it is not easy to be pulled out, which can ensure that the two splicing bodies 41 are firmly spliced.

[0063] like Figure 5 As shown, the holding portion 4323 is located above the connecting hole 4325, and the two are arranged up and down. The holding portion 4323 fixes the connecting member 42, and the connecting hole 4325 can pass through the locking nail body 4311. At this time, the second concave and convex teeth 422 of the connecting member 42 surround the clamping end 421 set on the connecting member 42.

[0064] In other embodiments, Fig.10 and Fig.11 As shown, the connecting hole 4325 passes through the holding portion 4323. An avoidance hole is provided on the clamping end 421 of the connecting member 42. When the locking nail body 4311 locks the first pressing block 4321 and the second pressing block 4322, the locking nail body 4311 directly passes through the avoidance hole, that is, the height of the first pressing block 4321 and the second pressing block 4322 can be set lower. When the height of the splicing body 41 is relatively low, this method can be used to effectively reduce the required installation height of the first pressing block 4321 and the second pressing block 4322. At this time, the second concave-convex teeth 422 are arranged on both sides, not around the clamping end 421.

[0065] like Figures 5 to 9 As shown, the splicing unit 40 further includes a limiting boss 44, a limiting mounting hole 413 is provided on the splicing body 41, the limiting mounting hole 413 is communicated with the second mounting hole 412, and the limiting boss 44 passes through the limiting mounting hole 413 and limits the sliding position of the first pressing block 4321 and the second pressing block 4322. When the first pressing block 4321 and the second pressing block 4322 slide in the second mounting hole 412, in order to prevent the first pressing block 4321 and the second pressing block 4322 from sliding out of the second mounting hole 412, the limiting boss 44 is extended into the second mounting hole 412 to limit the position of the first pressing block 4321 and the second pressing block 4322.

[0066] When the first pressing block 4321 and the second pressing block 4322 are installed, the limiting boss 44 does not protrude from the second mounting hole 412. When the first pressing block 4321 and the second pressing block 4322 are installed in the second mounting hole 412, the limiting boss 44 is partially inserted into the second mounting hole 412. At this time, two limiting mounting holes 413 are provided, and each limiting mounting hole 413 is installed with a limiting boss 44 for limiting the first pressing block 4321 or the second pressing block 4322.

[0067] like Figure 5 and Figure 8 As shown, the locking member 43 is provided with a transverse groove 4324, and the direction in which the transverse groove 4324 is provided is the same as the direction in which the second mounting hole 412 is provided, and the limiting boss 44 passes into the transverse groove 4324 and contacts the side wall of the transverse groove 4324. The side wall of the transverse groove 4324 contacts the limiting boss 44, that is, the distance that the limiting boss 44 slides in the transverse groove 4324 is the distance that the first pressing block 4321 and the second pressing block 4322 can slide. Specifically, the transverse groove 4324 is provided on both the first pressing block 4321 and the second pressing block 4322.

[0068] Specifically in this embodiment, the limiting protrusion 44 is a screw, which is screwed into the limiting installation hole 413 and further screwed to protrude into the second installation hole 412, so it is screwed out again when the first pressing block 4321 and the second pressing block 4322 are released. In order to avoid the screw blocking the two splicing bodies 41 during use, the screw here is a headless screw.

[0069] When quoting drawing descriptions, new features that appear are described; in order to avoid repeated quotations of drawings resulting in less concise descriptions, features that have been described clearly will not be quoted in the drawings one by one.

[0070] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to make the public understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the scope of protection of the present invention.

[0071] The above embodiments are not exhaustive enumerations of the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A splicing unit, characterized in that: It comprises a splicing body, a connecting piece and a locking piece, wherein the splicing body is provided with a first mounting hole and a second mounting hole, the first mounting hole is provided at the end of the splicing body, the second mounting hole is provided at the side of the splicing body, and the first mounting hole and the second mounting hole are communicated with each other inside the splicing body; One end of the connecting member is installed in the first mounting hole, and the locking member is installed in the second mounting hole, and the locking member cooperates with one end of the connecting member located in the first mounting hole; The locking member comprises a locking block and a holding block, the holding block passes through the second mounting hole and cooperates with the connecting member, the locking block cooperates with the holding block, and the locking block presses the holding block; The second mounting hole penetrates through both sides of the splicing body, the holding block comprises a first pressing block and a second pressing block, the first pressing block and the second pressing block are respectively installed from the second mounting holes on both sides of the splicing body, and the locking block cooperates with the first pressing block and the second pressing block; The locking block comprises a locking nail body, the first pressing block and the second pressing block are both provided with a connecting hole, and at least the inner wall of the connecting hole on the second pressing block is provided with a thread, the locking nail body passes through the connecting holes of the first pressing block and the second pressing block, and cooperates with the thread of the second pressing block; The pressing block is provided with a pressing portion, which is pressed and matched with the connecting piece; the pressing portion is set as a first concave-convex tooth, and the clamping end on the connecting piece is provided with a second concave-convex tooth matched with the first concave-convex tooth.

2. The splicing unit according to claim 1, characterized in that: It also includes a limiting boss, a limiting mounting hole is provided on the splicing body, the limiting mounting hole is communicated with the second mounting hole, the limiting boss passes through the limiting mounting hole, and limits the sliding of the locking member.

3. The splicing unit according to claim 2, characterized in that: The locking member is provided with a transverse groove, the direction in which the transverse groove is provided is the same as the direction of the second mounting hole, and the limiting protrusion passes through the transverse groove and contacts the side wall of the transverse groove.

4. The splicing unit according to any one of claims 1 to 3, characterized in that: The splicing body is provided with two first mounting holes and two second mounting holes, the two first mounting holes are respectively provided at the two ends of the splicing body, the two second mounting holes are both provided at the side of the splicing body, and are arranged up and down, and each of the first mounting holes and each of the second mounting holes are communicated with each other inside the splicing body.

5. The splicing unit according to any one of claims 1 to 3, characterized in that: The connecting member comprises two clamping ends, and the two clamping ends are respectively installed in the first mounting holes of the two splicing units.

6. A support column, characterized in that: The invention comprises at least two splicing units according to any one of claims 1 to 5, wherein the splicing units are spliced ​​together by the connecting piece.

7. A splicing method based on the splicing unit according to any one of claims 1 to 5, characterized in that: The steps include: The connecting piece is installed on the splicing body through the first mounting hole, and the locking piece is installed on the splicing body through the second mounting hole; The first mounting hole and the second mounting hole are connected inside the splicing body, and the connecting piece passes through the first mounting hole to the second mounting hole; The locking piece is driven from the side of the splicing body to approach the connecting piece, and the connecting piece is pressed to complete the matching, and the connecting piece is locked on the locking piece.

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