Combined clamp for milling machine

Abstract

The combined clamp for the milling machine comprises a first part and a second part, the first part comprises a bottom plate and an inclined plate, one end of the bottom plate is movably connected with one end of the inclined plate, and the bottom plate is provided with a first adjusting assembly; the first adjusting assembly can move along the bottom plate so as to change the angle between the inclined plate and the bottom plate. The second part comprises a fixing plate and a jacking plate of which one ends are movably connected, and the fixing plate is provided with a second adjusting assembly; the second adjusting assembly can move along the fixing plate so as to change the angle between the jacking plate and the fixing plate; and the inclined plate is provided with a third adjusting assembly, and the third adjusting assembly and the jacking plate can fix the to-be-machined workpiece. By means of the clamp capable of flexibly adjusting the position and the angle of the workpiece to be machined, the forming face of the workpiece can be adjusted to be in the relative horizontal position, a milling machine can conduct machining in a horizontal machining mode, the machining efficiency and the flatness of the forming face are improved, abrasion of a cutter is reduced, and the machining quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical workpiece processing fixtures, and in particular relates to a combined fixture used for a milling machine. Background Art

[0002] In mechanical processing, in order to ensure the surface roughness of the parts to be processed and the high-quality parts processing efficiency, the selection of appropriate fixtures plays a key role. When facing ordinary workpieces with relatively regular shapes, it is generally only necessary to fix the workpiece to be processed on the milling machine with a fixture, and then perform the processing. However, when facing irregular-shaped workpieces, it is obviously not enough for the fixture to only fix a single angle and position.

[0003] As an improvement, when faced with workpieces that need to adjust their position and angle, there are now fixtures that can adjust their horizontal position and angle. In this way, the fixture can be effectively adjusted according to the position requirements of the workpiece to be processed, so that the position of the workpiece to be processed can be more adapted to the job requirements, thereby improving processing efficiency and quality. However, in addition to the need for adjustment in the horizontal direction, the workpiece to be processed may also need to be adjusted in other directions such as the vertical direction. For example, in the process of using CNC machine tools, the parts to be processed usually need to be processed with planes, bevels, slots, holes, etc. The spindle and worktable of a general machine tool are vertical, and the spindle cannot rotate at an angle. There is no problem in processing planes, but irregularly shaped workpieces are often encountered, and the surfaces of these workpieces are at a certain angle to the spindle. To use a vertical milling machine to process the bevel, not only will the tool wear be severe, but the efficiency is also low. When machining an inclined surface on the surface of a workpiece to be machined, based on the shape of the workpiece itself, the current fixture has relatively limited ability to adjust the position of the workpiece to be machined. In order to target such workpieces to be machined, the milling machine generally needs to use a ball-end milling cutter to climb the slope to machine the inclined surface during the machining process. However, this method has a small cutting capacity. When machining an inclined surface with a large area, the service life of a milling cutter may not be enough to complete a machining operation. Therefore, there is a need to change the tool and re-align the tool in the middle. The inclined surface machined in this way will leave traces of tool connection on the workpiece, and if the span between each cut in the ball cutter climbing machining is large, steps will be formed on the machining surface. If the span is small, the efficiency is too low. Therefore, in summary, in the current milling machine machining, the existing fixtures cannot flexibly and effectively adjust the angle and position of the workpiece to be machined when facing some workpieces to be machined. Utility Model Content

[0004] The utility model aims to provide a combined fixture for a milling machine, which solves the problem that the existing fixture cannot flexibly and effectively adjust the angle and position of a workpiece to be processed when facing part of the workpiece to be processed during milling machine processing.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a combined clamp for a milling machine, the combined clamp comprises a first part and a second part, wherein:

[0007] The first part includes a bottom plate and an inclined plate movably connected at one end, and the bottom plate is provided with a first adjustment component; the first adjustment component can move along the bottom plate to change the angle between the inclined plate and the bottom plate;

[0008] The second part includes a fixed plate and a top plate movably connected at one end, and the fixed plate is provided with a second adjustment component; the second adjustment component can move along the fixed plate to change the angle between the top plate and the fixed plate;

[0009] The inclined plate is provided with a third adjusting assembly, and the third adjusting assembly and the tightening plate can fix the workpiece to be processed.

[0010] In some embodiments, the first adjustment component includes a first vertical plate connected to the base plate, the first vertical plate has an angle adjustment screw rod movably passing through it along its thickness direction, the angle adjustment screw rod is connected to a support block at one end away from the first vertical plate, and the support block is movably arranged on the base plate.

[0011] Furthermore, a first sliding groove is provided on the bottom plate, and a first sliding block is provided on the support block corresponding to the first sliding groove, and the first sliding block can slide along the length direction of the first sliding groove.

[0012] Furthermore, the first sliding groove is a T-shaped groove, and correspondingly, the first sliding block is a T-shaped block.

[0013] In some embodiments, a locking member is provided between the inclined plate and the bottom plate, and the locking member is used to lock the inclined plate to the bottom plate.

[0014] In some embodiments, the second adjustment assembly includes a first tightening screw rod, which passes through the fixing plate; the first tightening screw rod can limit the tightening plate with the help of the fixing plate.

[0015] In some embodiments, the third adjustment assembly includes a second vertical plate connected to the inclined plate, the second vertical plate has a second tightening screw movably passing through it along its thickness direction, the second tightening screw is connected to a tightening block at one end away from the second vertical plate, and the tightening block is movably arranged on the inclined plate.

[0016] Further, the first vertical plate is detachably connected to the bottom plate, and / or the second vertical plate is detachably arranged on the inclined plate.

[0017] Furthermore, the bottom plate and the inclined plate, and / or the fixed plate and the tightening plate are connected via a rotating member, and the rotating member is provided with an angle dial.

[0018] In some embodiments, the base plate further includes a positioning assembly, which is used to fix the first part to an external device. The positioning assembly includes a fixing seat extending along the thickness direction of the base plate, and the fixing seat is provided with a fixing hole.

[0019] Compared with the prior art, the combined clamp for a milling machine of the utility model has the following beneficial effects:

[0020] The combined clamp of the utility model comprises a first part and a second part, wherein: the first part comprises a bottom plate and an inclined plate movably connected at one end, the bottom plate is provided with a first adjustment component; the first adjustment component can move along the bottom plate to change the angle between the inclined plate and the bottom plate; the second part comprises a fixed plate and a top plate movably connected at one end, the fixed plate is provided with a second adjustment component; the second adjustment component can move along the fixed plate to change the angle between the top plate and the fixed plate; the inclined plate is provided with a third adjustment component, and the third adjustment component and the top plate can fix the workpiece to be processed. The utility model can make the workpiece to be processed firmly fixed on the machine tool worktable. Based on this, the utility model designs a clamp with multiple groups of adjustment components. By adjusting the angle and height of the clamp, when facing workpieces to be processed of different shapes, the clamp can adjust the processing surface of the workpiece to be processed to a relatively horizontal position, so that the milling machine can reduce the climbing of the ball head milling cutter to a certain extent during the processing process, and avoid the problem of reduced milling cutter life caused by extending the processing distance due to processing inclined surfaces, and reduce the problem of high processing surface roughness caused by replacing the milling cutter. The utility model designs a combined fixture with high flexibility in angle and position adjustment, which can flexibly adjust the position and angle of the workpiece to be processed so that the final molding surface can be kept horizontal. Based on this, the milling machine can use a horizontal machining tool for processing, thereby improving the flatness of the molded surface of the processed workpiece, and improving the overall processing quality, reducing tool wear and controlling costs.

[0021] The utility model improves the convenience of processing to a great extent by adjusting the position and angle of the support surface through the cooperation of the screw rod, the support and the lock, and conveniently operating and maintaining the clamp structure, which has good practical significance in the actual operation of the milling machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The utility model is a structural schematic diagram of a combined clamp for a milling machine.

[0024] Figure 2 It is a partially enlarged schematic diagram of the first part of a combined clamp for a milling machine according to the utility model.

[0025] Figure 3 This is a schematic structural diagram of a combined clamp for a milling machine according to the utility model at another angle.

[0026] Figure 4 It is a schematic structural diagram of an embodiment of a combined clamp for a milling machine of the utility model in a state where a first workpiece is installed.

[0027] Figure 5 This is a schematic structural diagram of another embodiment of a combined clamp for a milling machine of the utility model in a state where a second workpiece is installed.

[0028] Figure 6 It is a structural schematic diagram of an existing gantry milling machine.

[0029] Wherein: 1, bottom plate, 101, first slide groove, 102, mounting hole, 103, fixing seat, 104, fixing hole, 105, pin hole;

[0030] 2. first vertical plate, 3. support plate, 301. first slider, 302. threaded hole of angle adjustment screw;

[0031] 4. Angle adjustment screw rod, 5. Inclined plate; 501. Second slide groove, 502. Second slide block;

[0032] 6. first top tightening plate, 7. second vertical plate, 8. first top tightening screw rod, 9. locking member; 901. locking sheet, 902. screw;

[0033] 10. Angle dial, 11. First pin, 12. Fixing plate, 13. Second tightening screw rod, 14. Second pin, 15. Second tightening plate; 16. First workpiece, 161. First processing surface, 17. Second workpiece, 171. Second processing surface, 18. Cutting tool, 19. Machine tool worktable, 20. Machine tool gantry. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The utility model is further described in detail below with reference to the accompanying drawings:

[0041] See also Figure 1 , Figure 4 and Figure 5The utility model is a combined clamp for a milling machine, the combined clamp includes a first part and a second part, wherein: the first part includes a bottom plate 1 and an inclined plate 5 movably connected at one end, the bottom plate 1 is provided with a first adjustment component; the first adjustment component can move along the bottom plate 1 so as to change the angle between the inclined plate 5 and the bottom plate 1; the second part includes a fixed plate 12 and a top plate 15 movably connected at one end, the fixed plate 12 is provided with a second adjustment component; the second adjustment component can move along the fixed plate 12 so as to change the angle between the top plate 15 and the fixed plate 12; the inclined plate 5 is provided with a third adjustment component, the third adjustment component and the top plate 15 can fix the workpiece to be processed. In the utility model, the first part is used as a supporting device for the workpiece to be processed, and the second part is used as a top tightening device for the workpiece to be processed, which adjusts the workpiece to be processed to a suitable angle and fixes it through the cooperation of the two parts. During operation, the first part and the second part are fixed on the processing platform of the milling machine. The operator adjusts the first adjustment component, the second adjustment component and the third adjustment component, so that the workpiece to be processed can be pressed against the fixture of the utility model, and the final formed processing surface is horizontal, and the tool 18 can be processed horizontally. Compared with the ball-end milling cutter climbing method, the horizontal processing method of the tool 18 improves the processing quality and efficiency as well as the cost control of the tool. As a specific embodiment, the utility model of a combined fixture for a milling machine can be used on a CNC milling machine.

[0042] Reference Figure 2 In some embodiments, the first adjustment assembly in the utility model includes a first vertical plate 2 connected to the bottom plate 1, and the first vertical plate 2 is movably penetrated by an angle adjustment screw rod 4 along the thickness direction thereof, and the angle adjustment screw rod 4 is connected to a support block 3 at one end away from the first vertical plate 2, and the support block 3 is movably arranged on the bottom plate 1. An angle adjustment screw rod threaded hole 302 is opened in the thickness direction of the first vertical plate 2, and the angle adjustment screw rod 4 is threadedly matched with the angle adjustment screw rod threaded hole 302 after passing through. During operation, an auxiliary tool or the like can be used to rotate the angle adjustment screw rod 4, thereby driving the support block to move in the length direction of the bottom plate 1. Because the upper part of the support block 3 is against the inclined plate 5, the angle of the inclined plate 5 can be increased or decreased by moving the support block 3, so as to adjust the angular position of the inclined plate 5 in the vertical direction.

[0043] Reference Figure 2As a preferred embodiment, the base plate 1 in the utility model is provided with a first slide groove 101, and the support block 3 is provided with a first slider 301 corresponding to the first slide groove 101, and the first slider 301 can slide along the length direction of the first slide groove 101. The utility model has two first slide grooves 101 on the base plate 1 along its length direction, and two first sliders 301 are processed on the bottom of the support block 3. After installation, the first slider 301 can slide in the first slide groove 101 at its corresponding position, so that the support block 3 can keep the width direction of the base plate 1 limited during the sliding process, thereby improving the stability of the support block 3, the inclined plate 5 and even the entire first part.

[0044] As a specific embodiment, in actual operation, the first slide groove 101 of the utility model includes but is not limited to a T-slot, and the first slider 301 includes but is not limited to a T-block. The T-slot and slider can further ensure the stability of the support block 3 in the width direction of the bottom plate 1, and the bottom plate 1 and the support block 3 are matched with the "T"-slot, so that even if vibration occurs during the milling process, it can ensure that the angle between the two will not change to a certain extent.

[0045] Reference Figure 1 and Figure 3 In some embodiments, a locking member 9 is provided between the inclined plate 5 and the bottom plate 1 of the utility model, and the locking member 9 is used to lock the inclined plate 5 to the bottom plate 1, and the locking member 9 includes a locking piece 901 and a screw 902. On the basis of the above, the screw 902 can slide in the reserved long groove of the locking piece 901 while adjusting the angle of the inclined plate 5 and the bottom plate 1. After adjusting the angle of the inclined plate 5 and the bottom plate 1, the screw 902 is tightened to further limit and fix the inclined plate 5, thereby improving the stability of the first part.

[0046] Reference Figure 1 and Figure 3 In some embodiments, the second adjustment assembly of the utility model includes a first tensioning screw 13, and the first tensioning screw 13 passes through the fixed plate 12; the first tensioning screw 13 can limit the tensioning plate 15 with the help of the fixed plate 12. Similar to the structure of the first part, the fixed plate 12 of the second part has a facade, and the facade is movably connected with the tensioning plate 15. The fixed plate 12 can be but is not limited to an L-shaped plate. A screw threaded hole is also provided on the facade of the fixed plate 12 to cooperate with the first tensioning screw 13. During operation, because the right end of the first tensioning screw 13 abuts against the tensioning plate 15, by rotating the first tensioning screw 13, it moves horizontally, thereby changing the angle of the tensioning plate 15 in the vertical direction.

[0047] Reference Figure 1 , Figure 4 and Figure 5In some embodiments, the third adjustment assembly of the utility model includes a second vertical plate 7 connected to the inclined plate 5, and the second vertical plate 7 is movably penetrated by a second top screw 8 along the thickness direction thereof, and the second top screw 8 is connected to a top block 6 at one end away from the second vertical plate 7, and the top block 6 is movably arranged on the inclined plate 5. The third adjustment assembly of the utility model is similar to the first adjustment assembly, and the second top screw 8 is penetrated by the second vertical plate 7 to push or pull the top block 6, thereby changing the position of the top block 6. Under the joint action of the top block 6, the inclined plate 5 and the top plate 15, the first workpiece 16, the second workpiece 17, etc. can be positioned, and the first processing surface 161 and the second processing surface 171 that need to be formed at last are kept horizontal. Based on this, a tool 18 for horizontal processing can be selected, and the tool 18 can be selected but not limited to a disc face milling cutter. The surface smoothness of the workpiece processed by the disc face milling cutter is good, the processing efficiency is high, and the cost of the disc face milling cutter is low. It is in the form of a blade change, and the cost of a blade is much lower than that of a milling cutter. Therefore, the utility model makes the workpiece processing suitable for the horizontal processing of the tool by designing the clamp.

[0048] Reference Figure 6 In actual operation, as a specific embodiment, the milling machine has a machine table 19, a machine gantry 20 is installed on the machine table 19, a tool 18 is located on the machine gantry 20, a workpiece to be processed is fixed, and the workpiece to be processed is processed by the movement of the tool 18.

[0049] As a specific embodiment, similar to the first adjustment component, correspondingly, two second slide grooves 501 are opened on the inclined plate 5 of the utility model, and two corresponding second sliding blocks 502 are processed on the tightening block 6, the purpose of which is also to reduce the angular rotation of the tightening block 6 on the horizontal plane of the inclined plate 5, and to a certain extent ensure the stability of the tightening block 6 in the mobile tightening operation.

[0050] Reference Figure 2 and Figure 3 In some embodiments, the first vertical plate 2 of the present invention is detachably connected to the bottom plate 1, and / or the second vertical plate 7 is detachably arranged on the inclined plate 5. The present invention adopts a detachable design of the first vertical plate 1 and / or the second vertical plate 7. As a specific embodiment, for example, a mounting hole 102 is provided on the bottom plate 1, so as to improve the flexibility of the entire clamp and facilitate the maintenance of the clamp and the replacement of parts.

[0051] Reference Figure 2 and Figure 3In some embodiments, the bottom plate 1 and the inclined plate 5, and / or the fixed plate 12 and the top plate 15 of the utility model are connected by a rotating member, and the rotating member is equipped with an angle dial 10. As a specific embodiment, the rotating member can be but not limited to a pin hole 105 and a first pin 11. Of course, the connecting member of the second part can also be connected by a pin similar to the first part.

[0052] As a preferred embodiment, the rotating part of the utility model is provided with an angle dial 10, which can facilitate real-time observation and detection during the angle adjustment of the inclined plate 5 and the top plate 15, facilitate positioning of the staff, and improve the convenience of work.

[0053] In some embodiments, the base plate 1 of the present invention further includes a positioning assembly, which is used to fix the first part to an external device. The positioning assembly includes a fixing seat 103 extending along the thickness direction of the base plate 1, and the fixing seat 103 is provided with a fixing hole 104. As a specific embodiment, in the present invention, there are fixing seats 103 and fixing holes 104 on both sides of the base plate 1. During operation, the base plate 1 is fixed to the machine tool with the help of the fixing seats 103 and the fixing holes 104 by means of bolts or the like. The fixing plate 12 can be fixed by the pressing plate of the machine tool. Of course, as an option, the fixing plate 12 can also be provided with positioning holes or the like to be positioned by bolts. The purpose of this part is to fix the first part and the second part to the machine tool during operation.

[0054] Reference Figure 4 and Figure 5 As a specific embodiment, the utility model is a combined clamp for a milling machine. After the workpiece to be processed is installed, the clamp of the utility model can be adjusted to keep the processing surface that needs to be finally formed parallel to the machine tool, so that the milling cutter of the milling machine can perform horizontal processing on the workpiece. Since horizontal processing is more efficient and of higher quality than the climbing processing of a ball-end milling cutter, the position and angle of the workpiece to be processed can be flexibly adjusted based on the clamp of the utility model. The milling machine can choose a relatively low-cost disc face milling cutter, and the surface roughness of the workpiece processed by the disc face milling cutter after horizontal processing is better, the processing efficiency is also higher, and the overall quality is higher.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A modular fixture for a milling machine, characterized in that: The modular clamp comprises a first part and a second part, wherein: The first part comprises a bottom plate (1) and an inclined plate (5) movably connected at one end, and the bottom plate (1) is provided with a first adjustment component; the first adjustment component can move along the bottom plate (1) so as to change the angle between the inclined plate (5) and the bottom plate (1); The second part comprises a fixing plate (12) and a pressing plate (15) movably connected at one end, and the fixing plate (12) is provided with a second adjustment component; the second adjustment component can move along the fixing plate (12) so as to change the angle between the pressing plate (15) and the fixing plate (12); The inclined plate (5) is provided with a third adjustment component, and the third adjustment component and the clamping plate (15) can fix the workpiece to be processed.

2. The combined fixture for a milling machine according to claim 1, characterized in that: The first adjustment assembly comprises a first vertical plate (2) connected to the bottom plate (1); an angle adjustment screw rod (4) movably penetrates the first vertical plate (2) along the thickness direction thereof; the angle adjustment screw rod (4) is connected to a support block (3) at one end away from the first vertical plate (2); and the support block (3) is movably arranged on the bottom plate (1).

3. The combined fixture for a milling machine according to claim 2, characterized in that: The bottom plate (1) is provided with a first sliding groove (101), and the support block (3) is provided with a first sliding block (301) corresponding to the first sliding groove (101), and the first sliding block (301) can slide along the length direction of the first sliding groove (101).

4. The combined clamp for a milling machine according to claim 3, characterized in that: The first sliding groove (101) is a T-shaped groove, and correspondingly, the first sliding block (301) is a T-shaped block.

5. The combined clamp for a milling machine according to claim 1, characterized in that: A locking member (9) is provided between the inclined plate (5) and the bottom plate (1), and the locking member (9) is used to lock the inclined plate (5) to the bottom plate (1).

6. The combined fixture for a milling machine according to claim 1, characterized in that: The second adjustment assembly comprises a first tightening screw rod (13), and the first tightening screw rod (13) passes through the fixing plate (12); the first tightening screw rod (13) can limit the tightening plate (15) by means of the fixing plate (12).

7. The combined clamp for a milling machine according to claim 2, characterized in that: The third adjustment assembly comprises a second vertical plate (7) connected to the inclined plate (5); a second tightening screw rod (8) movably penetrates the second vertical plate (7) along the thickness direction thereof; the second tightening screw rod (8) is connected to a tightening block (6) at one end away from the second vertical plate (7); and the tightening block (6) is movably arranged on the inclined plate (5).

8. The combined clamp for a milling machine according to claim 7, characterized in that: The first vertical plate (2) is connected to the bottom plate (1) in a detachable manner, and / or the second vertical plate (7) is detachably arranged on the inclined plate (5).

9. The combined clamp for a milling machine according to claim 1, characterized in that: The bottom plate (1) and the inclined plate (5), and / or the fixed plate (12) and the tightening plate (15) are connected via a rotating member, and the rotating member is provided with an angle dial (10).

10. The combined clamp for a milling machine according to claim 1, characterized in that: The base plate (1) also includes a positioning assembly, which is used to fix the first part to an external device. The positioning assembly includes a fixing seat (103) extending along the thickness direction of the base plate (1), and the fixing seat (103) is provided with a fixing hole (104).

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