CN222176746U - A combined fixture for milling machine - Google Patents

Abstract

The utility model discloses a combined clamp for a milling machine, which comprises a first part and a second part, wherein the first part comprises a bottom plate and an inclined plate, one end of the bottom plate is movably connected with the inclined plate, a first adjusting component is arranged on the bottom plate, the first adjusting component 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 fixed plate and a jacking plate, one end of the fixed plate is movably connected with the fixed plate, the fixed plate is provided with a second adjusting component, the second adjusting component can move along the fixed plate so as to change the angle between the jacking plate and the fixed plate, and the inclined plate is provided with a third adjusting component which can fix a workpiece to be processed. The utility model can flexibly adjust the position and angle of the workpiece to be processed by means of the clamp so as to adjust the molding surface of the workpiece to be a relative horizontal position, so that the milling machine can process in a horizontal processing mode, the processing efficiency and the flatness of the molding surface are improved, the abrasion of a cutter is reduced, and the processing quality is improved.

Description

Combined clamp for milling machine

Technical Field

The utility model belongs to the technical field of machining fixtures of mechanical workpieces, and particularly relates to a combined fixture for a milling machine.

Background

In the machining operation, in order to ensure the surface roughness of the part to be machined and the machining efficiency of the part with high quality, a proper fixture is selected to play a critical role. When facing a workpiece with a common relatively regular shape, the workpiece to be machined is generally only required to be fixed on a milling machine by adopting a fixture, and then the machining operation is performed. But the fixture is obviously not sufficiently fixed at a single angle and position when facing irregularly shaped workpieces.

As an improvement, when the position and the angle of the clamp to be machined are required to be adjusted, the clamp capable of adjusting the horizontal position and the angle is made currently, so that the clamp can be effectively adjusted according to the position requirement of a workpiece to be machined, the position of the workpiece to be machined can be more adapted to the operation requirement, and the machining efficiency and the machining quality are improved. However, in addition to the adjustment in the horizontal direction, there may be cases where the workpiece to be processed needs to be adjusted in other directions such as the vertical direction. For example, in the machining process using a numerical control machine tool, the machined part is usually required to be machined to have a plane, an inclined plane, a slot, a hole and the like. The main shaft and the workbench of the general machine tool are vertical, the main shaft cannot rotate by an angle, and a processing plane is free of problems, but workpieces with irregular shapes are frequently encountered, and the surfaces of the workpieces are at an angle with the main shaft. The inclined plane is machined by using the vertical milling, so that the cutter is seriously worn and has low efficiency. When the surface of a workpiece to be machined is used for machining an inclined plane, based on the shape of the workpiece to be machined, the position adjustment of the workpiece to be machined by the existing clamp is relatively limited, in order to aim at the workpiece to be machined, a milling machine generally needs to adopt a ball end milling cutter climbing mode to machine the inclined plane, but the cutting tool draft is small in the mode, when the inclined plane is machined with a large area, the service life of a milling cutter possibly is insufficient to finish one-time machining operation, and therefore the operations of tool changing and tool resetting are needed in the middle. Moreover, the inclined plane processed by the method can generate a trace for connecting the cutter on the workpiece, and when the interval span of each cutter is large in the ball cutter climbing type processing, steps can be formed on the processing surface, and when the interval is small, the efficiency is too low. Therefore, in summary, in the milling machine processing at present, the existing fixture clamp cannot flexibly and effectively adjust the angle and position of the workpiece to be processed when facing part of the workpiece to be processed.

Disclosure of utility model

The utility model aims to provide a combined fixture for a milling machine, which solves the problem that the angle and the position of a workpiece to be processed cannot be flexibly and effectively adjusted when the existing fixture faces part of the workpiece to be processed in the milling machine processing at present.

In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:

The utility model provides a combined clamp for a milling machine, which comprises a first part and a second part, wherein:

the first part comprises a bottom plate and an inclined plate, wherein one end of the bottom plate is movably connected with the inclined plate, and the bottom plate is provided with a first adjusting component which 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 fixed plate and a jacking plate, wherein one end of the fixed plate is movably connected with the jacking plate, and the fixed plate is provided with a second adjusting component which can move along the fixed plate so as to change the angle between the jacking plate and the fixed plate;

The swash plate is provided with third adjusting part, and third adjusting part can be fixed with waiting to process the work piece with the tight board in top.

In some embodiments, the first adjusting assembly comprises a first vertical plate connected to the bottom plate, the first vertical plate movably penetrates through an angle adjusting screw rod along the thickness direction of the first vertical plate, the angle adjusting screw rod is connected with a supporting block at one end far away from the first vertical plate, and the supporting block is movably arranged on the bottom plate.

Further, a first sliding groove is formed in the bottom plate, a first sliding block is arranged on the supporting block corresponding to the first sliding groove, and the first sliding block can slide along the length direction of the first sliding groove.

Further, the first sliding groove is a T-shaped groove, and correspondingly, the first sliding block is a T-shaped block.

In some embodiments, a locking member is disposed between the swash plate and the base plate, the locking member being configured to lock the swash plate to the base plate.

In some embodiments, the second adjusting assembly comprises a first tightening screw penetrating through the fixed plate, and the first tightening screw is capable of limiting the tightening plate by means of the fixed plate.

In some embodiments, the third adjusting component comprises a second vertical plate connected to the inclined plate, a second tightening screw rod movably penetrates through the second vertical plate along the thickness direction of the second vertical plate, a tightening block is connected to one end, far away from the second vertical plate, of the second tightening screw rod, and the tightening block is movably arranged on the inclined plate.

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.

Further, the bottom plate is connected with the inclined plate and/or the fixed plate is connected with the tightening plate through a rotating piece, and the rotating piece is provided with an angle dial.

In some embodiments, the base plate further comprises a positioning assembly, the positioning assembly is used for fixing the first portion to an external device, the positioning assembly comprises a fixing seat extending along the thickness direction of the base plate, and the fixing seat is provided with a fixing hole.

Compared with the prior art, the combined fixture for the milling machine has the following beneficial effects:

the combined clamp comprises a first part and a second part, wherein the first part comprises a bottom plate and an inclined plate, one end of the bottom plate is movably connected with the inclined plate, the bottom plate is provided with a first adjusting component, the first adjusting component 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 fixed plate and a jacking plate, one end of the fixed plate is movably connected with the fixed plate, the fixed plate is provided with a second adjusting component, the second adjusting component can move along the fixed plate so as to change the angle between the jacking plate and the fixed plate, and the inclined plate is provided with a third adjusting component which can fix a workpiece to be processed. According to the utility model, the workpiece to be machined can be firmly fixed on the machine tool workbench, based on the fixture, the fixture can adjust the machining surface of the workpiece to be machined to a relative horizontal position when facing the workpiece to be machined with different shapes through the angle and height adjustment of the fixture, so that the milling machine can machine in a mode of reducing the climbing of the ball end milling cutter to a certain extent in the machining process, the problem of the reduction of the service life of the milling cutter caused by the extension of the machining distance of a machining inclined surface and the like is avoided, and the problem of high roughness of the machined surface caused by the replacement of the milling cutter is reduced. According to the utility model, the combined clamp with high flexibility in angle and position adjustment can flexibly adjust the position and angle of the workpiece to be processed so as to keep the final forming surface in the horizontal direction, and based on the clamp, the milling machine can process by adopting a horizontally processed cutter, so that the flatness of the forming surface of the processed workpiece is improved, and the processing quality is improved as a whole. The abrasion of the cutter is reduced, and the cost is controlled.

According to the fixture disclosed by the utility model, the position and the angle of the supporting surface are adjusted through the coordination of the screw rod, the support and the locking, so that the angle of a workpiece is adjusted, the convenience of processing is improved to a greater extent, the fixture is simple in structure, convenient to operate and convenient to maintain, and the fixture has good practical significance in actual operation of a milling machine.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a combined fixture for a milling machine according to the present utility model.

Fig. 2 is an enlarged partial view of a first portion of a modular fixture for a milling machine according to the present utility model.

Fig. 3 is a schematic view of a combined fixture for a milling machine according to the present utility model at another angle.

Fig. 4 is a schematic view showing a structure of a combined jig for a milling machine in a state where a first workpiece is mounted in one embodiment of the utility model.

Fig. 5 is a schematic view showing a structure of a combination jig for a milling machine according to another embodiment of the present utility model in a state where a second workpiece is mounted.

Fig. 6 is a schematic structural diagram of a conventional planer type milling machine.

Wherein: 1, a bottom plate, 101, a first chute, 102, a mounting hole, 103, a fixed seat, 104, a fixed hole, 105 and a pin hole;

2. A first vertical plate, 3, a supporting plate, 301, a first sliding block, 302, angle adjusting screw rod threaded holes;

4. the angle adjusting screw rod, 5, sloping plate, 501, second chute, 502, second slide block;

6. The first jacking plate, 7, the second vertical plate, 8, the first jacking screw rod, 9, the locking piece, 901, the locking piece, 902 and the screw;

10. The angle dial, 11, the first pin, 12, the fixed plate, 13, the second jacking screw rod, 14, the second pin, 15, the second jacking plate, 16, the first workpiece, 161, the first processing surface, 17, the second workpiece, 171, the second processing surface, 18, the cutter, 19, the machine tool workbench, 20 and the machine tool portal frame.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or communicating between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model is described in further detail below with reference to the attached drawing figures:

Referring to fig. 1, 4 and 5, the combined clamp for a milling machine comprises a first part and a second part, wherein the first part comprises a bottom plate 1 and a sloping plate 5, one end of the bottom plate is movably connected, the bottom plate 1 is provided with a first adjusting component, the first adjusting component can move along the bottom plate 1 so as to change the angle between the sloping plate 5 and the bottom plate 1, the second part comprises a fixed plate 12 and a jacking plate 15, one end of the fixed plate is movably connected, the fixed plate 12 is provided with a second adjusting component, the second adjusting component can move along the fixed plate 12 so as to change the angle between the jacking plate 15 and the fixed plate 12, the sloping plate 5 is provided with a third adjusting component, and the third adjusting component and the jacking plate 15 can fix a workpiece to be processed. In the utility model, the first part is used as a supporting device of a workpiece to be processed, and the second part is used as a jacking device of the workpiece to be processed, and the workpiece to be processed is adjusted to a proper angle and fixed through the cooperation of the two parts. In operation, the first part and the second part are fixed on the processing platform of the milling machine, an operator can tightly prop against the clamp of the utility model through adjusting the first adjusting component, the second adjusting component and the third adjusting component, the processing surface of the final forming is horizontal, the cutter 18 can be processed horizontally, and compared with the climbing mode of the ball end milling cutter, the quality and the efficiency of processing and the cost control of the cutter are improved in the mode of horizontal processing by the cutter 18. As a specific embodiment, a modular fixture for a milling machine of the present utility model may be applied to a numerically controlled milling machine.

Referring to fig. 2, in some embodiments, the first adjusting assembly of the present utility model includes a first vertical plate 2 connected to a base plate 1, the first vertical plate 2 movably penetrates an angle adjusting screw 4 along a thickness direction thereof, the angle adjusting screw 4 is connected with a supporting block 3 at one end far from the first vertical plate 2, and the supporting block 3 is movably disposed on the base plate 1. The angle adjusting screw hole 302 is formed in the thickness direction of the first vertical plate 2, the angle adjusting screw 4 is in threaded fit with the angle adjusting screw hole 302 after passing through, in operation, an auxiliary tool and the like can be adopted to rotate the angle adjusting screw 4, and then the supporting block is driven to move in the length direction of the bottom plate 1, and the upper portion of the supporting block 3 is propped against the inclined plate 5, so that the angle of the inclined plate 5 can be increased or decreased through the movement of the supporting block 3, and the angle position of the inclined plate 5 in the vertical direction can be adjusted.

Referring to fig. 2, as a preferred embodiment, the base plate 1 of the present utility model is provided with a first sliding groove 101, and the supporting 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. According to the utility model, two first sliding grooves 101 are formed in the bottom plate 1 along the length direction of the bottom plate, and two first sliding blocks 301 are processed at the bottom of the supporting block 3. After the installation, the first sliding block 301 can slide in the first sliding groove 101 at the corresponding position, so that the supporting block 3 keeps the limit of the width direction of the bottom plate 1 in the sliding process, and the stability of the supporting block 3, the inclined plate 5 and even the whole first part is improved.

As a specific embodiment, in practical operation, the first sliding chute 101 of the present utility model includes, but is not limited to, a T-shaped chute, and the first sliding block 301 includes, but is not limited to, a T-shaped block. The stability of the supporting block 3 in the width direction of the bottom plate 1 can be further achieved through the T-shaped sliding grooves and the sliding blocks, and the bottom plate 1 and the supporting block 3 are matched through the T-shaped grooves, so that even vibration is generated in the machining process of the milling machine, the angle of the T-shaped sliding grooves and the sliding blocks can be prevented from being changed to a certain extent.

Referring to fig. 1 and 3, in some embodiments, a locking member 9 is provided between the swash plate 5 and the base plate 1, the locking member 9 is used to lock the swash plate 5 to the base plate 1, and the locking member 9 includes a locking piece 901 and a screw 902. On the basis of the above, the angle of the inclined plate 5 and the bottom plate 1 is adjusted, and the screw 902 can slide in the reserved long groove of the locking piece 901. After the angle between the swash plate 5 and the base plate 1 is adjusted, the screws 902 are tightened to further limit and fix the swash plate 5, thereby improving the stability of the first portion.

Referring to fig. 1 and 3, in some embodiments, the second adjustment assembly of the present utility model includes a first tightening screw 13, the first tightening screw 13 penetrating through the fixing plate 12, the first tightening screw 13 being capable of limiting the tightening plate 15 by means of the fixing plate 12. Similar to the structure of the first part, the fixed plate 12 of the second part has a vertical face to which the tightening plate 15 is movably connected. The fixing plate 12 may be, but is not limited to, an L-shaped plate. Screw threaded holes are also formed in the vertical face of the fixing plate 12 to be matched with the first tightening screw 13. In operation, since the right end of the first knock-up screw 13 abuts against the knock-up plate 15, the angle of the knock-up plate 15 in the vertical direction is changed by rotating the first knock-up screw 13 so that it moves horizontally.

Referring to fig. 1, 4 and 5, in some embodiments, the third adjusting assembly of the present utility model includes a second vertical plate 7 connected to the inclined plate 5, the second vertical plate 7 is movably penetrated with a second tightening screw 8 along a thickness direction thereof, the second tightening screw 8 is connected with a tightening block 6 at one end far from the second vertical plate 7, and the tightening block 6 is movably disposed at the inclined plate 5. The third adjusting component is similar to the first adjusting component, the second tightening screw rod 8 is used for pushing or pulling the tightening block 6 in a mode of penetrating through the second vertical plate 7, so that the position of the tightening block 6 is changed, the first workpiece 16, the second workpiece 17 and the like can be positioned under the combined action of the tightening block 6, the inclined plate 5 and the tightening plate 15, the first machined surface 161 and the second machined surface 171 which are required to be formed finally are kept horizontal, a cutter 18 for horizontal machining can be selected based on the positioning, the cutter 18 can be selected but not limited to a disc type face milling cutter, the smoothness of the surface of a workpiece machined by the disc type face milling cutter is good, the machining efficiency is high, the cost of the disc type face milling cutter is low, the cost of one cutter is far lower than that of a milling cutter in a cutter changing blade mode. The utility model thus makes the workpiece processing suitable for horizontal processing of the tool by designing the clamp.

Referring to fig. 6, in actual operation, as a specific example, the milling machine has a machine table 19, a machine gantry 20 is mounted on the machine table 19, a tool 18 is located on the machine gantry 20, a workpiece to be machined is fixed, and the workpiece to be machined is machined by movement of the tool 18.

As a specific embodiment, like the first adjusting component, two second sliding grooves 501 are correspondingly formed on the inclined plate 5, and two corresponding second sliding blocks 502 are processed on the tightening block 6, so that the angular rotation of the tightening block 6 on the horizontal plane of the inclined plate 5 is reduced, and the stability of the tightening block 6 in the moving tightening operation is ensured to a certain extent.

Referring to fig. 2 and 3, in some embodiments, the first riser 2 of the present utility model is detachably connected to the base plate 1 and/or the second riser 7 is detachably provided to the swash plate 5. According to the utility model, the first vertical plate 1 and/or the second vertical plate 7 are/is designed in a detachable mode, so that the flexibility of the whole clamp is improved, and the maintenance of the clamp and the replacement of parts are facilitated, for example, the mounting holes 102 are formed in the bottom plate 1.

Referring to fig. 2 and 3, in some embodiments, the base plate 1 and the swash plate 5, and/or the fixed plate 12 and the tightening plate 15 of the present utility model are connected by a rotation member provided with an angle dial 10. As a specific example, the rotating member may be, but is not limited to, the pin bore 105 and the first pin 11. Of course the connection of the second part may also be made with a pin connection similar to the first part.

As a preferable mode, the rotating piece is provided with the angle dial 10, so that the purpose of real-time observation and detection can be conveniently achieved in the angle adjustment of the inclined plate 5 and the jacking plate 15, the positioning of workers is facilitated, and the convenience of work is improved.

In some embodiments, the base plate 1 of the present utility model further includes a positioning assembly, where the positioning assembly is used to fix the first portion to an external device, and the positioning assembly includes a fixing base 103 extending along a thickness direction of the base plate 1, where the fixing base 103 is provided with a fixing hole 104. As a specific example, in the present utility model, the base plate 1 is provided with the fixing base 103 and the fixing hole 104 on both sides, and in operation, the base plate 1 is fixed to the machine tool by bolts or the like via the fixing base 103 and the fixing hole 104. The fixing plate 12 may be fixed by a pressing plate of a machine tool, and the fixing plate 12 may be fixed by bolts, such as a positioning hole, as an alternative. The purpose of this part is to secure the first part and the second part to the machine tool during operation.

Referring to fig. 4 and 5, as a specific embodiment, the combined fixture for a milling machine of the present utility model can maintain the parallelism of the machining surface to be finally formed with the machine tool by adjusting the fixture of the present utility model after installing the workpiece to be machined, so that the milling cutter of the milling machine can horizontally machine the workpiece. Compared with the climbing type machining of the ball end mill, the horizontal machining is higher in efficiency and quality, the clamp based on the utility model can flexibly adjust the position and angle of a workpiece to be machined, the milling machine can select a disc type face milling cutter with relatively low cost, the surface roughness of the workpiece machined after the disc type face milling cutter is horizontally machined is better, the machining efficiency is higher, and the overall quality is higher.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A combined fixture for a milling machine, characterized in that the combined fixture 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 clamp for a milling machine according to claim 1 is characterized in that the first adjustment component includes a first vertical plate (2) connected to a base plate (1), and the first vertical plate (2) is movably penetrated by an angle adjustment screw (4) along its thickness direction, and the angle adjustment screw (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 base plate (1). 3. The combined clamp for a milling machine according to claim 2 is characterized in that a first slide groove (101) is provided on the base plate (1), and a first slider (301) is provided on the support block (3) corresponding to the first slide groove (101), and the first slider (301) can slide along the length direction of the first slide groove (101). 4. The combined fixture for a milling machine according to claim 3 is characterized in that the first slide groove (101) is a T-slot, and correspondingly, the first sliding block (301) is a T-block. 5. The combined clamp for a milling machine according to claim 1 is characterized in that a locking member (9) is provided between the inclined plate (5) and the base plate (1), and the locking member (9) is used to lock the inclined plate (5) to the base plate (1). 6. The combined clamp for a milling machine according to claim 1 is characterized in that the second adjustment component includes a first tightening screw rod (13), and the first tightening screw rod (13) passes through the fixed plate (12); the first tightening screw rod (13) can limit the tightening plate (15) with the help of the fixed plate (12). 7. The combined clamp for a milling machine according to claim 2 is characterized in that the third adjustment component includes a second vertical plate (7) connected to the inclined plate (5), and the second vertical plate (7) is movably penetrated by a second tightening screw (8) along its thickness direction, and the second tightening screw (8) is connected to a tightening block (6) at the 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 detachably connected to the base plate (1), 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 is characterized in that the base plate (1) and the inclined plate (5), and/or the fixed plate (12) and the tightening plate (15) are connected by 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 is characterized in that the base plate (1) also includes a positioning component, the positioning component is used to fix the first part to an external device, the positioning component 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).