Positioning assembly

Abstract

The utility model discloses a positioning assembly, which comprises a seat body, two positioning blocks and two groups of adjusting driving mechanisms, the two positioning blocks are arranged on the seat body at intervals in the longitudinal direction, each positioning block is provided with a positioning surface, an approximately V-shaped positioning groove is defined between the two positioning surfaces, and the adjusting driving mechanisms are arranged in the positioning groove. And each adjusting driving mechanism is arranged between the corresponding positioning block and the seat body, so that the mounting position of each positioning block in the longitudinal direction relative to the seat body is adjustable. In the embodiment, by adjusting and moving all the positioning faces, the positioning assembly can better adapt to workpieces with different precision errors, the assembling gaps between the workpieces and all the positioning faces are effectively reduced, the stability of the workpieces in the machining process is improved, and therefore the machining precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a positioning component. Background Technology

[0002] V-blocks are auxiliary devices used in machining for the inspection, scribing, clamping, and positioning of precision parts. Most existing V-blocks are fixed, non-adjustable structures used in integral machining. When multiple V-blocks are used for assisted positioning of a workpiece, several problems arise. Firstly, the workpiece itself has inherent precision errors; different batches of workpieces may have slight dimensional differences. Secondly, during installation, it's difficult to guarantee absolute accuracy of the V-block's position, inevitably leading to installation position deviations. These factors combined result in an assembly gap between the workpiece and the V-block's positioning surface. During machining, the workpiece is subjected to cutting forces, clamping forces, and other external forces. Due to the assembly gap, the workpiece cannot receive stable and reliable support, making it prone to deformation. This deformation directly affects machining accuracy, causing the dimensional and shape accuracy of the machined parts to fail to meet design requirements, increasing scrap rates, raising production costs, reducing production efficiency, and failing to meet the high-precision machining demands of modern manufacturing. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a positioning component that can adjust the installation position of each positioning surface in both directions to reduce the assembly gap between the workpiece and each positioning surface.

[0004] To achieve the above objectives, the present invention provides a positioning component, comprising:

[0005] seat body;

[0006] Two positioning blocks are longitudinally spaced apart from the base body. Each positioning block has a positioning surface, and each positioning surface is inclined from top to bottom toward the other positioning block; and...

[0007] The adjustment drive mechanism is provided in two sets, with each adjustment drive mechanism respectively disposed between the corresponding positioning block and the base, so that the longitudinal installation position of each positioning block relative to the base is adjustable.

[0008] Optionally, each of the adjustment drive mechanisms includes a lead screw and a threaded pair with a threaded engagement. The lead screw is rotatably mounted on one of the corresponding positioning block and the seat. A threaded hole is opened on the other of the corresponding positioning block and the seat. The threaded pair is formed in the threaded hole, and the lead screw is screwed into the threaded hole.

[0009] Optionally, the seat includes a base plate and two side plates, the two positioning blocks are installed on the upper side of the base plate, and the two side plates are respectively protruding from the upper side of the base plate and distributed on both sides of the two positioning blocks in the longitudinal direction;

[0010] Each of the positioning blocks is provided with a screw hole, and each of the lead screws extends and is disposed between the corresponding positioning block and the side plate adjacent to the positioning block. One end of the lead screw is rotatably mounted on the side plate, and the other end of the lead screw is inserted into the screw hole and screwed with the threaded pair in the screw hole.

[0011] Optionally, each of the adjustment drive mechanisms is provided with a ranging structure, which is used to show the longitudinal installation position of the corresponding positioning block.

[0012] Optionally, the ranging structure includes a sleeve and a tubular member. The sleeve is fixed to the outer periphery of the lead screw and defines an annular gap between the sleeve and the lead screw. The tubular member is arranged around the outer periphery of the screw hole and extends from the outside of the screw hole toward the sleeve. The tubular member is sleeved on the outer periphery of the lead screw and inserted into the annular gap. One of the sleeve and the tubular member is provided with a scale extending circumferentially along the lead screw, and the other of the sleeve and the tubular member is provided with a mark that mates with the scale.

[0013] Optionally, the socket is provided with an operating ring, which is a concave-convex structure formed on the outer periphery of the socket, and the operating ring is spaced apart from the scale and the mark in the longitudinal direction.

[0014] Optionally, the base is provided with a guide portion extending longitudinally, and the lower end of each positioning block is provided with a guide engagement portion, and each guide engagement portion slides in conjunction with the guide portion.

[0015] Optionally, the seat body further includes a pressure block and a rib. Two ribs are provided and protrude from the upper side of the base plate. The two ribs extend longitudinally and are arranged side by side in the transverse direction. An opening groove forming an upper opening is defined between the two ribs. The pressure block is detachably connected to the upper side of each rib.

[0016] The guiding mating part is a guide groove formed at the lower end of each of the positioning blocks. The guide grooves are distributed laterally on both sides of the corresponding positioning blocks and extend longitudinally. The bottom of each positioning block is inserted into the opening groove. The edge of each pressing block near the positioning block extends to the top of the opening groove and is embedded in the corresponding guide groove to form the guiding part.

[0017] Optionally, the two side plates are connected one-to-one and detachably to the base plate and each of the protruding ribs.

[0018] Optionally, each of the protruding ribs is recessed inward relative to the base plate at both ends in the longitudinal direction and is provided with a first mounting hole. The base plate is provided with a second mounting hole at the upper side of each end in the longitudinal direction. Each of the side plates abuts against the end side of each protruding rib on the side closest to each of the positioning blocks and is connected to each of the protruding ribs through the first mounting hole. The bottom side of each of the side plates is stacked on the upper side of the base plate and is connected to the base plate through the second mounting hole.

[0019] The technical solution provided by this utility model has the following beneficial effects:

[0020] The positioning component provided by this utility model includes a base, two positioning blocks, and two sets of adjustment drive mechanisms. The two positioning blocks are installed longitudinally at intervals on the base. Each positioning block is provided with a positioning surface, and the two positioning surfaces define a roughly V-shaped positioning groove. Each adjustment drive mechanism is respectively disposed between the corresponding positioning block and the base, so that the longitudinal installation position of each positioning block relative to the base is adjustable. In this embodiment, by adjusting and moving the positioning surfaces, the positioning component can better adapt to workpieces with different precision errors, effectively reduce the assembly gap between the workpiece and each positioning surface, improve the stability of the workpiece during processing, and thus improve processing accuracy. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings and the structures shown without creative effort.

[0022] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the positioning component provided by this utility model;

[0023] Figure 2 for Figure 1 Top view of the positioning component;

[0024] Figure 3 for Figure 2 Sectional view at point AA;

[0025] Figure 4 for Figure 2 Sectional view at point BB;

[0026] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0027] Figure 6 for Figure 1 A three-dimensional exploded view of the positioning component;

[0028] Figure 7 for Figure 6 A schematic diagram of the assembly of the adjustment drive mechanism and the positioning block;

[0029] Figure 8 for Figure 7 A three-dimensional structural diagram of the positioning block;

[0030] Figure 9 for Figure 7 A three-dimensional structural diagram of the lead screw and the connecting piece;

[0031] Figure 10 for Figure 7 A three-dimensional structural breakdown diagram of the central base.

[0032] Explanation of icon numbers:

[0033] 100-Positioning component; 10-Base; 11-Base plate; 111-Second mounting hole; 12-Side plate; 13-Protruding rib; 131-First mounting hole; 14-Pressure block; 15-Opening groove; 20-Positioning block; 21-Positioning surface; 22-Screw hole; 23-Guide groove; 30-Adjustment drive mechanism; 31-Lead screw; 32-Threaded pair; 40-Distance measuring structure; 41-Sleeve; 411-Annular gap; 412-Operating ring; 42-Tube; 43-Scale.

[0034] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] This utility model provides a positioning component 100 for assisting in positioning shaft components during machining.

[0039] Specifically, please refer to Figures 1 to 7 The positioning component 100 provided in this embodiment has a structure similar to a traditional V-shaped bracket. The positioning component 100 includes a base 10, two positioning blocks 20, and two sets of adjustment drive mechanisms 30. The two positioning blocks 20 are longitudinally spaced apart from each other on the base 10. Each positioning block 20 is provided with a positioning surface 21, and each positioning surface 21 is inclined downwards towards the other positioning block 20. Thus, a roughly V-shaped positioning groove is defined between the two positioning surfaces 21. Through this positioning component 100, or in conjunction with more positioning components 100, shaft-type components can be positioned and clamped.

[0040] In this embodiment, two sets of adjustment drive mechanisms 30 are provided, each set positioned between the corresponding positioning block 20 and the seat 10, allowing the longitudinal mounting position of each positioning block 20 relative to the seat 10 to be adjustable. Operators can adjust the actual longitudinal mounting position of each positioning block 20 relative to the seat 10 by adjusting each drive mechanism, ensuring the distance between the two positioning blocks 20 matches the size of the shaft-like parts they are positioning. The adjustment can be manual or automated, for example, using hydraulic or pneumatic drives to adjust the position of the positioning blocks 20, adapting to different working scenarios and precision requirements. In some automated production lines, the control system can precisely control the movement of the adjustment drive mechanisms 30 to achieve rapid positioning of shaft-like parts of different specifications.

[0041] It should be noted that in this embodiment, the longitudinal and transverse directions are perpendicular to each other and are both approximately parallel to the horizontal direction. Specifically, in this embodiment, the angles between the longitudinal and transverse directions and the horizontal direction are both no greater than 15 degrees.

[0042] In this embodiment, by adjusting and moving each positioning surface 21, the positioning component 100 can better adapt to workpieces with different precision errors, effectively reduce the assembly gap between the workpiece and each positioning surface 21, improve the stability of the workpiece during the processing, and thus improve the processing accuracy.

[0043] Based on the previous embodiment, each adjustment drive mechanism 30 includes a threaded lead screw 31 and a threaded pair 32. The lead screw 31 is rotatably mounted on one of the corresponding positioning block 20 and the seat 10, and a threaded hole 22 is formed on the other of the corresponding positioning block 20 and the seat 10. The threaded pair 32 is formed within the threaded hole 22, and the lead screw 31 is screwed into the threaded hole 22. Specifically, in actual manufacturing, if the threaded hole 22 is provided on the positioning block 20 and the lead screw 31 is rotatably mounted on the seat 10, when the position of the positioning block 20 needs to be adjusted, the operator rotates the lead screw 31. Under the action of the threaded pair 32, the lead screw 31 moves axially along the threaded hole 22, thereby driving the positioning block 20 to move longitudinally. Conversely, the lead screw 31 can also be rotatably mounted on the positioning block 20, and the threaded hole 22 can be formed on the seat 10. It is understandable that the rotation direction of the lead screw 31 determines the movement direction of the positioning block 20. Rotating the lead screw 31 clockwise will move the positioning block 20 to one end in the longitudinal direction, and rotating it counterclockwise will move the positioning block 20 to the other end in the longitudinal direction. The specific direction depends on the thread direction of the lead screw 31 and the screw hole 22.

[0044] In this embodiment, each adjustment drive mechanism 30 employs a screw 31 and a threaded pair 32 in a threaded engagement. By rotating the screw 31, the longitudinal movement distance of the positioning block 20 can be precisely controlled through the threaded transmission between the screw 31 and the threaded pair 32. Furthermore, the screw 31 and the threaded pair 32 have a self-locking mechanism, ensuring that the positioning block 20 remains stably in its current position after adjustment and will not easily move due to external forces. Optionally, each positioning block 20 can be manually adjusted. The operator can slowly rotate the screw 31 to precisely adjust the position of the positioning block 20, ensuring that the positioning surface 21 is in close contact with the workpiece. Thus, the adjustment drive mechanism 30 has a simple and reliable structure and low manufacturing cost.

[0045] Furthermore, the lead screw 31 is rotatably mounted on the base 10 and screwed into the screw hole 22 on the positioning block 20. Specifically, the base 10 includes a base plate 11 and two side plates 12. The two positioning blocks 20 are mounted on the upper side of the base plate 11, and the two side plates 12 protrude from the upper side of the base plate 11 and are distributed on both sides of the two positioning blocks 20 in the longitudinal direction. Specifically, the side plates 12 can be integrally formed with the base plate 11, or they can be fixed to the base plate 11 by welding or detachable connection.

[0046] Each positioning block 20 has a screw hole 22. Each lead screw 31 extends between the corresponding positioning block 20 and the side plate 12 adjacent to the positioning block 20. One end of the lead screw 31 is rotatably mounted on the side plate 12, and the other end of the lead screw 31 is inserted into the screw hole 22 and screwed into the threaded pair 32 in the screw hole 22. The rotatable connection between the lead screw 31 and the side plate 12 can be in various ways, such as forming mutually compatible rotating shafts and shaft holes on both, or setting mutually cooperating pivoting parts and pivoting support parts, etc.

[0047] This structure utilizes the longitudinal space of the positioning element to form a threaded pair 32, making the base 10 compact and space-saving. In some processing equipment with high space requirements, this compact structure can be easily integrated into the equipment. Moreover, since the installation positions of the lead screw 31 and the positioning block 20 are relatively fixed, the operation is more stable and reliable when adjusting the position of the positioning block 20.

[0048] Preferably, each adjustment drive mechanism 30 is equipped with a ranging structure 40, which displays the longitudinal installation position of the corresponding positioning block 20. The ranging structure 40 works by converting the movement distance of the positioning block 20 into a visual numerical value or marked position through a specific structure. Through the ranging structure 40, operators can intuitively understand the adjustment position of the positioning block 20, facilitating precise control of the distance between the two positioning blocks 20 and improving the accuracy and efficiency of the adjustment. For example, when positioning workpieces of different specifications, operators can quickly adjust the positioning block 20 to the appropriate position based on the value displayed by the ranging structure 40, reducing adjustment time and improving production efficiency.

[0049] Different types of ranging structures 40 can be selected in different working environments. For example, in machining applications requiring high precision, electronic ranging devices, such as laser ranging sensors or inductive displacement sensors, can be used. In optional embodiments, a mechanical ranging structure 40 that is convenient to operate and maintain can be used.

[0050] Preferably, the ranging structure 40 includes a sleeve 41 and a tubular member 42. The sleeve 41 is fixed to the outer periphery of the lead screw 31 and defines an annular gap 411 between the sleeve 41 and the lead screw 31. The tubular member 42 is arranged around the outer periphery of the screw hole 22 and extends from the outside of the screw hole 22 toward the sleeve 41. The tubular member 42 is sleeved on the outer periphery of the lead screw 31 and inserted into the annular gap 411. One of the sleeve 41 and the tubular member 42 is provided with a scale 43 extending circumferentially along the lead screw 31, and the other of the sleeve 41 and the tubular member 42 is provided with a mark that cooperates with the scale 43.

[0051] This structure is simple and intuitive. By observing the relative position of the mark and the scale 43, the movement distance of the positioning block 20 can be easily determined. For example, during operation, the operator can directly observe the position change of the mark on the scale 43 when adjusting the lead screw 31, and promptly understand the adjustment status of the positioning block 20. Furthermore, the interlocking fit between the tubular part 42, the sleeve part 41, and the lead screw 31 also plays a good guiding role, limiting the rotation of the lead screw 31 and preventing it from deviating.

[0052] Ideally, the socket 41 is provided with an operating ring 412. The operating ring 412 is a concave-convex structure formed on the outer periphery of the socket 41, and the operating ring 412 is spaced apart from the scale 43 and markings in the longitudinal direction. In actual operation, the operator can rotate the lead screw 31 by grasping the operating ring 412. The concave-convex structure increases the friction between the hand and the operating ring 412, making operation more convenient. Moreover, since the operating ring 412 is spaced apart from the scale 43 and markings, it will not obstruct the view during operation, making it easy to read the value.

[0053] Based on the above embodiments, in order to ensure the stability of the positioning block 20 during the adjustment process, prevent the positioning block 20 from shifting or shaking during movement, and improve positioning accuracy, a guide portion extending longitudinally is provided on the base 10, and a guide mating portion is provided at the lower end of each positioning block 20, with each guide mating portion slidingly engaging with the guide portion. The shapes of the guide portion and the guide mating portion can be varied, such as using a dovetail groove structure, a T-groove structure, etc.

[0054] Thus, in actual operation, when the adjusting drive mechanism 30 moves the positioning block 20, the guide mating part slides on the guide part, ensuring that the positioning block 20 can only move longitudinally, thereby improving the positioning accuracy. During the processing, even when subjected to large external forces, the positioning block 20 can be stably limited under the constraint of the guide part, ensuring that the positioning surface 21 always maintains good contact with the workpiece.

[0055] Optionally, the base 10 also includes a pressure block 14 and a protruding rib 13. Two protruding ribs 13 are provided, protruding from the upper side of the base plate 11. The two protruding ribs 13 extend longitudinally and are arranged side-by-side laterally. An opening groove 15 is defined between the two protruding ribs 13, forming an upper opening. The pressure block 14 is detachably connected to the upper side of each protruding rib 13. The guiding mating part is a guide groove 23 formed at the lower end of each positioning block 20. The guide grooves 23 are distributed laterally on both sides of the corresponding positioning block 20 and extend longitudinally. The bottom of each positioning block 20 is inserted into the opening groove 15. The edge of each pressure block 14 near the positioning block 20 extends to the top of the opening groove 15 and is embedded in the corresponding guide groove 23 to form a guiding part. This ingenious structural design, through the cooperation of the pressure block 14 and the protruding rib 13 with the positioning block 20, not only achieves the guiding function but also has a compact structure and is easy to install. The rib 13 and the pressure block 14 cooperate to form a T-shaped guide groove 23, and the pressure block 14 is embedded in the guide grooves 23 on both sides of the positioning block 20, which can provide extremely stable support for the positioning block 20. During the processing, even if subjected to a large external force, the positioning block 20 can be stably limited under the constraint of the guide part, ensuring that the positioning surface 21 always maintains good contact with the workpiece.

[0056] In actual installation, the bottom of the positioning block 20 is first inserted into the opening slot 15, and then the pressure block 14 is installed on the protruding rib 13, so that the edge of the pressure block 14 is embedded in the guide groove 23. This structure is easy to install, and when it is necessary to replace the positioning block 20 or maintain the base 10, only the pressure block 14 needs to be removed. Different connection methods between the pressure block 14 and the protruding rib 13 can be selected for different application scenarios. For situations where the pressure block 14 needs to be frequently removed, a snap-fit ​​method can be selected for faster operation. For situations where high connection strength is required, a bolt connection method can be selected to ensure the reliability of the connection.

[0057] Preferably, the two side plates 12 are detachably connected to the base plate 11 and each of the protruding ribs 13 in a one-to-one correspondence. This detachable connection method facilitates the assembly and disassembly of the seat 10, making it easier to maintain, replace parts, or adjust the structure of the seat 10 in the future. For example, if the positioning block 20 or the adjustment drive mechanism 30 malfunctions, the side plates 12 can be easily disassembled to replace the damaged parts. Furthermore, the side plates 12, the base plate 11, and the protruding ribs 13 are fixedly connected to each other, which helps to improve the overall strength and stability of the seat 10.

[0058] Specifically, each rib 13 is recessed inwards from the base plate 11 at both ends in the longitudinal direction and has a first mounting hole 131. The base plate 11 has a second mounting hole 111 on its upper sides at both ends in the longitudinal direction. Each side plate 12 abuts against the corresponding end of each rib 13 on the side closest to each positioning block 20 and is connected to each rib 13 through the first mounting hole 131. The bottom side of each side plate 12 is stacked on the upper side of the base plate 11 and is connected to the base plate 11 through the second mounting hole 111. In this embodiment, the number and distribution of the first mounting holes 131 and the second mounting holes 111 can be optimized according to the stress conditions of the seat 10. The shape of the mounting holes can also be diversified, such as using a waist-shaped hole, to facilitate fine-tuning during installation.

[0059] In this embodiment, the recessed end of the protruding rib 13 can prevent interference with other components during installation and use. For example, in situations where the internal space of the equipment is limited, the recessed end of the protruding rib 13 can better adapt to confined installation environments. Furthermore, the stepped surface formed by it and the base plate 11 can achieve pre-positioning of the side plate 12 during the assembly of the base 10, improving assembly efficiency.

[0060] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A positioning component, characterized in that, include: seat body; Two positioning blocks are longitudinally spaced apart from the base body. Each positioning block has a positioning surface, and each positioning surface is inclined from top to bottom toward the other positioning block; and... The adjustment drive mechanism is provided in two sets, with each adjustment drive mechanism respectively disposed between the corresponding positioning block and the base, so that the longitudinal installation position of each positioning block relative to the base is adjustable.

2. The positioning component as described in claim 1, characterized in that, Each of the aforementioned adjustment drive mechanisms includes a threaded lead screw and a threaded pair. The lead screw is rotatably mounted on one of the corresponding positioning block and the corresponding seat. A threaded hole is opened on the other of the corresponding positioning block and the corresponding seat. The threaded pair is formed in the threaded hole, and the lead screw is screwed into the threaded hole.

3. The positioning component as described in claim 2, characterized in that, The seat includes a base plate and two side plates. The two positioning blocks are installed on the upper side of the base plate. The two side plates are respectively protruding from the upper side of the base plate and distributed on both sides of the two positioning blocks in the longitudinal direction. Each of the positioning blocks is provided with a screw hole, and each of the lead screws extends and is disposed between the corresponding positioning block and the side plate adjacent to the positioning block. One end of the lead screw is rotatably mounted on the side plate, and the other end of the lead screw is inserted into the screw hole and screwed with the threaded pair in the screw hole.

4. The positioning component as described in claim 3, characterized in that, Each of the aforementioned adjustment drive mechanisms is provided with a ranging structure, which is used to indicate the longitudinal installation position of the corresponding positioning block.

5. The positioning component as described in claim 4, characterized in that, The ranging structure includes a sleeve and a tubular component. The sleeve is fixed to the outer periphery of the lead screw and defines an annular gap between the sleeve and the lead screw. The tubular component is arranged around the outer periphery of the screw hole and extends from the outside of the screw hole toward the sleeve. The tubular component is sleeved on the outer periphery of the lead screw and inserted into the annular gap. One of the sleeve and the tubular component is provided with a scale extending circumferentially along the lead screw, and the other of the sleeve and the tubular component is provided with a mark that mates with the scale.

6. The positioning component as described in claim 5, characterized in that, The socket is provided with an operating ring, which is a concave-convex structure formed on the outer periphery of the socket, and the operating ring is spaced apart from the scale and the mark in the longitudinal direction.

7. The positioning component as described in any one of claims 3 to 6, characterized in that, The base is provided with a guide portion extending longitudinally, and the lower end of each positioning block is provided with a guide engagement portion, and each guide engagement portion slides in conjunction with the guide portion.

8. The positioning component as described in claim 7, characterized in that, The seat also includes a pressure block and a rib. There are two ribs, which protrude from the upper side of the base plate. The two ribs extend longitudinally and are arranged side by side in the transverse direction. An opening groove is defined between the two ribs to form an upper opening. The pressure block is detachably connected to the upper side of each rib. The guiding mating part is a guide groove formed at the lower end of each of the positioning blocks. The guide grooves are distributed laterally on both sides of the corresponding positioning blocks and extend longitudinally. The bottom of each positioning block is inserted into the opening groove. The edge of each pressing block near the positioning block extends to the top of the opening groove and is embedded in the corresponding guide groove to form the guiding part.

9. The positioning component as described in claim 8, characterized in that, The two side plates are one-to-one and detachably connected to the base plate and each of the protruding ribs.

10. The positioning component as claimed in claim 9, characterized in that, Each of the protruding ribs is recessed at both ends relative to the base plate in the longitudinal direction and has a first mounting hole. The base plate has a second mounting hole at each of its two ends in the longitudinal direction. Each of the side plates abuts against the end of each protruding rib on the side closest to each of the positioning blocks and is connected to each protruding rib through the first mounting hole. The bottom side of each of the side plates is stacked on the top side of the base plate and is connected to the base plate through the second mounting hole.

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