Rear blade mounting device

Abstract

The utility model discloses a rear blade installation device which comprises an operation platform, a blade profiling base used for installing a rear blade is arranged on the operation platform, and a first accessory preassembling block and a second accessory preassembling block are installed on the operation platform in a sliding mode. The blade profiling base is located between the first accessory preassembling block and the second accessory preassembling block, the first accessory preassembling block slides back and forth to be connected with or separated from one side of the blade profiling base, and the second accessory preassembling block slides back and forth to be connected with or separated from the other side of the blade profiling base. According to the mounting device, manual alignment is replaced, accurate alignment of the rear blade in the assembling process can be ensured, deviation in the assembling process is prevented, and rapid and accurate assembling of the rear blade is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile accessory assembly, and more particularly to a rear vane mounting device. BACKGROUND

[0002] With the development of the automobile manufacturing industry and the increasing demand of consumers for automobile comfort, air conditioning systems have become a standard configuration of automobiles, and the air outlet, as an important component, directly affects the performance of the air conditioning system and the user experience. The air outlet assembly includes two groups of vanes, the front vane and the rear vane. The front vane is the vane group directly facing the interior space of the vehicle, and it is mainly responsible for adjusting the air outlet direction, so that the airflow can be blown to different areas of the vehicle as needed. The rear vane is located at the rear of the air outlet, close to the air duct inlet, and mainly plays the role of auxiliary adjustment of air volume and airflow distribution. The adjustment of the rear vane can change the size and shape of the airflow cross section entering the air outlet, thereby roughly controlling the air volume and providing a basis for the precise adjustment of the front vane. The coordinated work of the front and rear vanes can achieve a wider range of air volume adjustment. The assembly precision of the rear vane has an important influence on its function. Traditional rear vane assembly relies on manual operation, and workers need to insert the vanes one by one and ensure their correct position in the shell. This manual assembly method not only has low efficiency, but also is prone to assembly errors and vane damage, and requires high skills of workers. In summary, the manual assembly method has many shortcomings and cannot meet the requirements of modern automobile manufacturing industry for efficient, accurate and stable assembly. Therefore, there is still a need for a rear vane mounting device that can achieve efficient assembly. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a rear vane mounting device that replaces manual alignment and can ensure accurate alignment of the rear vane during assembly, prevent deviation during assembly, and achieve rapid and accurate assembly of the rear vane.

[0004] The present application provides a rear vane mounting device, which includes an operation platform, the operation platform is provided with a vane profiling base for mounting the rear vane, the operation platform is slidably provided with a first accessory pre-assembly block and a second accessory pre-assembly block, the vane profiling base is located between the first accessory pre-assembly block and the second accessory pre-assembly block, the first accessory pre-assembly block is slid back and forth to engage or disengage with one side of the vane profiling base, and the second accessory pre-assembly block is slid back and forth to engage or disengage with the other side of the vane profiling base.

[0005] In the technical solution, the operation platform provides stable support and working space for the blade profiling base, the first accessory preloading block and the second accessory preloading block. The blade profiling base is arranged for mounting the rear blade and has a shape and size matching the profile of the rear blade, so as to ensure accurate positioning and fixing of the rear blade. The first accessory preloading block is arranged for preloading accessories on one side of the rear blade, and the second accessory preloading block is arranged for preloading accessories on the other side of the rear blade. The first accessory preloading block and the second accessory preloading block are both slidingly mounted on the operation platform and can be quickly moved to a specified position. The operator only needs to place the accessories into the corresponding preloading blocks. The first accessory preloading block and the second accessory preloading block are both engaged with the blade profiling base through sliding, so that the preloaded accessories can be mounted on the rear blade. The multiple rear blades are linked together. The operator only needs to control the sliding of the preloading blocks to complete the assembly, greatly improving the production efficiency. The design of the blade profiling base and the accessory preloading blocks enables accurate alignment of the rear blade and the accessories, reduces errors in manual operation, improves the assembly precision, and makes the operation process simpler and faster, reducing complex alignment and adjustment steps and ensuring the quality stability and consistency of the products.

[0006] As an improvement, the bottom of the first accessory preloading block is provided with a first sliding block, the bottom of the second accessory preloading block is provided with a second sliding block, and the operation platform is provided with a first sliding rail and a second sliding rail. The first accessory preloading block is slidingly connected with the first sliding rail through the first sliding block, and the second accessory preloading block is slidingly connected with the second sliding rail through the second sliding block. In the technical solution, the first sliding block is arranged on the first accessory preloading block, and the first sliding rail is arranged on the operation platform. The design of the first sliding rail is used to guide the movement of the first sliding block, so as to ensure that the first accessory preloading block can slide back and forth along a predetermined path and accurately dock with the blade profiling base. The cooperation of the first sliding block and the first sliding rail enables the first accessory preloading block to smoothly slide on the operation platform. Similarly, the second sliding block is arranged on the second accessory preloading block, and the second sliding rail is arranged on the operation platform. The design of the second sliding rail is used to guide the movement of the second sliding block, so as to ensure that the second accessory preloading block can slide back and forth along a predetermined path and accurately dock with the blade profiling base. The cooperation of the second sliding block and the second sliding rail enables the second accessory preloading block to smoothly slide on the operation platform, reducing friction and vibration during sliding and improving the stability and reliability of the assembly process, thereby improving the production efficiency.

[0007] As an improvement, the operating platform is provided with a first pushing mechanism and a second pushing mechanism, the first pushing mechanism is connected with the first accessory pre-install block to drive the first accessory pre-install block to slide, and the second pushing mechanism is connected with the second accessory pre-install block to drive the second accessory pre-install block to slide. In the technical solution, the first accessory pre-install block and the second accessory pre-install block are both connected with a pushing mechanism, so that each accessory pre-install block can be independently driven to realize precise sliding control. The pushing mechanism can be a cylinder, a hydraulic cylinder or an electric push rod, which can provide stable and controllable pushing force to ensure the smooth movement of the accessory pre-install block. The use of the first pushing mechanism and the second pushing mechanism reduces the steps of manual operation. The operator only needs to start the two pushing mechanisms to realize the automatic sliding and positioning of the two accessory pre-install blocks, greatly improving the assembly efficiency.

[0008] As an improvement, the operating platform is provided with a first pushing mechanism and a second pushing mechanism, the first pushing mechanism is connected with the first accessory pre-install block to drive the first accessory pre-install block to slide, and the second pushing mechanism is connected with the second accessory pre-install block to drive the second accessory pre-install block to slide. In the technical solution, the first accessory pre-install block and the second accessory pre-install block are both connected with a pushing mechanism, so that each accessory pre-install block can be independently driven to realize precise sliding control. The pushing mechanism can be a cylinder, a hydraulic cylinder or an electric push rod, which can provide stable and controllable pushing force to ensure the smooth movement of the accessory pre-install block. The use of the first pushing mechanism and the second pushing mechanism reduces the steps of manual operation. The operator only needs to start the two pushing mechanisms to realize the automatic sliding and positioning of the two accessory pre-install blocks, greatly improving the assembly efficiency.

[0009] As an improvement, one end of the pressing block is rotatably connected with the first column, and the other end of the pressing block is provided with a positioning column. The blade profiling base is provided with a positioning groove matched with the positioning column. The positioning column and the positioning groove abut to limit the rotation range of the pressing block. In the technical solution, the positioning column is arranged at the other end of the pressing block, and the positioning column is matched with the positioning groove on the blade profiling base to ensure accurate positioning during clamping. The positioning column can accurately abut in the groove during clamping, and the abutting relationship between the positioning column and the positioning groove limits the rotation range of the pressing block, so that the pressing block can maintain a stable clamping state when clamping the rear blade, preventing damage to the rear blade due to excessive rotation, and improving the quality stability of the product.

[0010] As an improvement, the first accessory pre-install block is provided with a first mounting slot adapted to the rear blade support rod, and the second accessory pre-install block is provided with a second mounting slot adapted to the rear blade support rod, and the first mounting slot and the second mounting slot are both used for mounting the rear blade support rod. In the technical solution, the first mounting slot is arranged on the first accessory pre-install block, and the second mounting slot is arranged on the second accessory pre-install block, so that the two groups of rear blade support rods can be accurately mounted on the two accessory pre-install blocks, and the plurality of rear blades are connected by the rear blade support rods and limited in the air outlet shell. The rear blade support rod provides support for the rear blade. The design of the first mounting slot and the second mounting slot takes into account the size and shape of the rear blade support rod. The operator only needs to place the rear blade support rod in the corresponding mounting slot, and the rear blade support rod can be assembled to the rear blade by sliding the two accessory pre-install blocks. The time for manual alignment and adjustment is reduced, and the assembly efficiency is improved.

[0011] As an improvement, the first accessory pre-install block is provided with a third mounting slot adapted to the rear blade linkage rod, and the third mounting slot is used for mounting the rear blade linkage rod. In the technical solution, the first accessory pre-install block is provided with a third mounting slot adapted to the rear blade linkage rod, and the third mounting slot is specially used for mounting the rear blade linkage rod. The design of the third mounting slot provides installation guidance for the rear blade linkage rod, ensures installation in place, and the operator only needs to place the rear blade linkage rod in the third mounting slot. The rear blade linkage rod can be assembled to the rear blade by sliding the first accessory pre-install block. The time for manual alignment and adjustment is reduced, and the assembly efficiency is improved.

[0012] As an improvement, the plane where the third mounting slot is located is higher than the plane where the first mounting slot is located, and the third mounting slot is closer to the blade profiling base than the first mounting slot. In the technical solution, the plane where the third mounting slot is located is higher than the plane where the first mounting slot is located, which provides a mounting position closer to the blade profiling base for the rear blade linkage rod. This helps to distinguish the mounting positions of the rear blade support rod and the rear blade linkage rod, ensures the reasonable layout of the two in the air outlet shell, ensures that the rear blade linkage rod maintains a proper gap with the inner wall of the air outlet shell, thereby avoiding interference with the linkage of the rear blade, and improving the installation reliability. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A perspective structural schematic view of the rear blade mounting device of the application assembling the rear blade.

[0014] Figure 2 A perspective structural schematic view of the rear blade mounting device of the application assembling the rear blade support rod and the rear blade linkage rod.

[0015] Figure 3 A perspective structural schematic view of the first accessory pre-install block in the application.

[0016] Figure 4 This is a three-dimensional structural diagram of the air outlet housing assembled with a rear blade mounting device according to this application.

[0017] The figure shows: 1. Operating platform; 11. First slide rail; 12. Second slide rail; 13. First column; 14. Pressure block; 15. Positioning column; 2. Blade contour base; 21. Positioning groove; 3. First accessory pre-assembly block; 31. First slider; 32. First mounting groove; 33. Third mounting groove; 4. Second accessory pre-assembly block; 41. Second slider; 42. Second mounting groove; 5. Rear blade; 6. First pushing mechanism; 7. Second pushing mechanism; 8. Rear blade support rod; 9. Rear blade linkage rod; 10. Air outlet housing. Detailed Implementation

[0018] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0019] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0020] It should also be understood that the terms "comprising," "including," "having," "containing," and "including," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and constructions may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0021] Furthermore, it has to be noted that the terms "mounting", "arrangement", "provided with", "connected", "connected to" are to be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral construction; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection via one or more intermediates; it can be a connection between two devices, elements or components, or an internal connection within one device, element or component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are to be interpreted for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0022] As shown in Figures 1 to 4 The present application discloses a rear blade mounting device, comprising an operation platform 1, a blade profiling base 2 for mounting a rear blade 5 is arranged on the operation platform 1, a first accessory preloading block 3 and a second accessory preloading block 4 are slidingly mounted on the operation platform 1, the blade profiling base 2 is located between the first accessory preloading block 3 and the second accessory preloading block 4, the operation platform 1 provides stable support and working space for the blade profiling base 2, the first accessory preloading block 3 and the second accessory preloading block 4, the blade profiling base 2 is arranged for mounting the rear blade 5, its shape and size match the profile of the rear blade 5, ensuring that the rear blade 5 can be accurately positioned and fixed, the first accessory preloading block 3 is arranged for preloading accessories on one side of the rear blade 5, the second accessory preloading block 4 is arranged for preloading accessories on the other side of the rear blade 5, the first accessory preloading block 3 slides back and forth to engage or disengage with one side of the blade profiling base 2, the second accessory preloading block 4 slides back and forth to engage or disengage with the other side of the blade profiling base 2, the first accessory preloading block 3 and the second accessory preloading block 4 can quickly move to the designated position, the operator only needs to put the accessories into the corresponding preloading block, the first accessory preloading block 3 and the second accessory preloading block 4 are engaged with the blade profiling base 2 through sliding, so that the preloaded accessories can be mounted on the rear blade 5, multiple rear blades 5 are linked, the operator only needs to control the sliding of the preloading block to complete the assembly, greatly improving the production efficiency, the design of the blade profiling base 2 and the preloading block enables the rear blade 5 and the accessories to be accurately aligned, reducing the error in manual operation, thereby improving the assembly precision, and the entire operation process is simpler and faster, reducing the complex alignment and adjustment steps, ensuring the quality stability and consistency of the product.

[0023] More specifically, as shown in Figure 1 and Figure 2As shown, the bottom of the first accessory pre-assembly block 3 is provided with a first sliding block 31, the bottom of the second accessory pre-assembly block 4 is provided with a second sliding block 41, and the operation platform 1 is provided with a first sliding rail 11 and a second sliding rail 12. The first accessory pre-assembly block 3 is connected with the first sliding rail 11 through the first sliding block 31, and the second accessory pre-assembly block 4 is connected with the second sliding rail 12 through the second sliding block 41. By providing the first sliding block 31 on the first accessory pre-assembly block 3 and the first sliding rail 11 on the operation platform 1, the first sliding rail 11 is designed to guide the movement of the first sliding block 31, ensuring that the first accessory pre-assembly block 3 can slide back and forth along a predetermined path, and the first accessory pre-assembly block 3 can accurately dock with the blade profiling base 2. The cooperation of the first sliding block 31 and the first sliding rail 11 enables the first accessory pre-assembly block 3 to slide smoothly on the operation platform 1, and the same applies to the second accessory pre-assembly block 4. By providing the second sliding block 41 on the second accessory pre-assembly block 4 and the second sliding rail 12 on the operation platform 1, the second sliding rail 12 is designed to guide the movement of the second sliding block 41, ensuring that the second accessory pre-assembly block 4 can slide back and forth along a predetermined path, and the second accessory pre-assembly block 4 can accurately dock with the blade profiling base 2. The cooperation of the second sliding block 41 and the second sliding rail 12 enables the second accessory pre-assembly block 4 to slide smoothly on the operation platform 1, reducing friction and vibration during sliding, thereby improving the stability and reliability of the assembly process and improving production efficiency.

[0024] More specifically, as shown in Figure 1 and Figure 2 The operation platform 1 is provided with a first pushing mechanism 6 and a second pushing mechanism 7. The first pushing mechanism 6 is connected with the first accessory pre-assembly block 3 to drive the first accessory pre-assembly block 3 to slide, and the second pushing mechanism 7 is connected with the second accessory pre-assembly block 4 to drive the second accessory pre-assembly block 4 to slide. The first accessory pre-assembly block 3 and the second accessory pre-assembly block 4 are both connected with a pushing mechanism, so that each accessory pre-assembly block can be independently driven to achieve precise sliding control. The pushing mechanism can be, but is not limited to, a pneumatic cylinder, a hydraulic cylinder, or an electric push rod, which can provide stable and controllable pushing force to ensure smooth movement of the accessory pre-assembly block. The use of the first pushing mechanism 6 and the second pushing mechanism 7 reduces the steps of manual operation. The operator only needs to start the two pushing mechanisms to realize the automatic sliding and positioning of the two accessory pre-assembly blocks, greatly improving the assembly efficiency.

[0025] More specifically, as shown in Figure 1 and Figure 2As shown, the operating platform 1 is provided with a first column 13 and a pressing block 14, the first column 13 is installed on the operating platform 1, and the pressing block 14 is rotationally connected with the first column 13. The pressing block 14 is matched with the blade profiling base 2 through back-and-forth rotation to clamp and limit or release the limitation of the rear blade 5. The first column 13 is installed on the operating platform 1 to play a supporting and fixing role. The pressing block 14 is rotationally connected with the first column 13, and the pressing block 14 is matched with the blade profiling base 2 through back-and-forth rotation to realize clamping and limiting or releasing the limitation of the rear blade 5, thereby ensuring the stability and accuracy of the rear blade 5 during assembly, improving the assembly precision, and simplifying the assembly steps. The operator only needs to control the rotation of the pressing block 14 to clamp and limit or release the limitation of the rear blade 5, which makes the clamping and releasing process of the rear blade 5 more rapid and convenient, reduces the waiting and adjustment time of the operator during assembly, and improves the assembly efficiency.

[0026] More specifically, as shown in Figure 1 and Figure 2 , one end of the pressing block 14 is rotationally connected with the first column 13, and the other end of the pressing block 14 is provided with a positioning column 15. The blade profiling base 2 is provided with a positioning groove 21 matched with the positioning column 15. The positioning column 15 is in abutment with the positioning groove 21 to limit the rotation range of the pressing block 14. The positioning column 15 is matched with the positioning groove 21 on the blade profiling base 2 to ensure accurate positioning during clamping. The positioning column 15 can accurately abut in the groove during clamping. The abutment relationship between the positioning column 15 and the positioning groove 21 limits the rotation range of the pressing block 14, so that the pressing block 14 can maintain a stable clamping state when clamping the rear blade 5, preventing damage to the rear blade 5 due to excessive rotation, and improving the quality stability of the product.

[0027] More specifically, as shown in Figures 2 to 4 , the first accessory preloading block 3 is provided with a first installation groove 32 matched with the rear blade support rod 8, and the second accessory preloading block 4 is provided with a second installation groove 42 matched with the rear blade support rod 8. The first installation groove 32 and the second installation groove 42 are both used for installing the rear blade support rod 8. A plurality of rear blades 5 are connected and limited in the air outlet shell 10 through the rear blade support rod 8. The rear blade support rod 8 provides support for the rear blade 5. The first installation groove 32 is provided on the first accessory preloading block 3, and the second installation groove 42 is provided on the second accessory preloading block 4, so that the two groups of rear blade support rods 8 can be accurately installed on the two accessory preloading blocks. The design of the first installation groove 32 and the second installation groove 42 takes into account the size and shape of the rear blade support rod 8. The operator only needs to place the rear blade support rod 8 in the corresponding installation groove, and the rear blade support rod 8 can be assembled to the rear blade 5 through the sliding of the two accessory preloading blocks, thereby reducing the time for manual alignment and adjustment and improving the assembly efficiency.

[0028] More specifically, as shown in Figure 2 and Figure 3 , the first accessory preloading block 3 is provided with a third mounting groove 33 matched with the rear vane linkage rod 9, and the third mounting groove 33 is used for mounting the rear vane linkage rod 9. The first accessory preloading block 3 is provided with a third mounting groove 33 matched with the rear vane linkage rod 9, and the third mounting groove 33 is specially used for mounting the rear vane linkage rod 9. The third mounting groove 33 provides mounting guidance for the rear vane linkage rod 9, ensuring that it is installed in place. The operator only needs to place the rear vane linkage rod 9 in the third mounting groove 33, and through the sliding of the first accessory preloading block 3, the rear vane linkage rod 9 can be assembled to the rear vane 5, reducing the time for manual alignment and adjustment, and improving the assembly efficiency.

[0029] More specifically, as shown in Figure 3 and Figure 4 , the plane where the third mounting groove 33 is located is higher than the plane where the first mounting groove 32 is located, and the third mounting groove 33 is closer to the vane profiling base 2 than the first mounting groove 32. The plane where the third mounting groove 33 is located is set to be higher than the plane where the first mounting groove 32 is located, providing a mounting position for the rear vane linkage rod 9 closer to the vane profiling base 2, which helps to distinguish the mounting positions of the rear vane support rod 8 and the rear vane linkage rod 9, ensuring a reasonable layout of the two in the air outlet shell 10, ensuring that the rear vane linkage rod 9 maintains a proper gap with the inner wall of the air outlet shell 10, thereby avoiding interference with the linkage of the rear vane 5, and improving the installation reliability.

[0030] The present application is not limited to the above best embodiment, and anyone can derive other various forms of products under the inspiration of the present application, but regardless of any changes in shape or structure, any technical solution with the same or similar technical solutions as the present application falls within the scope of protection of the present application.

Claims

1. A rear blade mounting arrangement comprising an operating platform (1), characterized in that The operation platform (1) is provided with a blade profiling base (2) for installing a rear blade (5), the operation platform (1) is slidably provided with a first accessory preloading block (3) and a second accessory preloading block (4), the blade profiling base (2) is located between the first accessory preloading block (3) and the second accessory preloading block (4), the first accessory preloading block (3) is slid back and forth to engage or disengage with one side of the blade profiling base (2), and the second accessory preloading block (4) is slid back and forth to engage or disengage with the other side of the blade profiling base (2).

2. A rear blade mounting arrangement according to claim 1, characterised in that The bottom of the first accessory preloading block (3) is provided with a first sliding block (31), the bottom of the second accessory preloading block (4) is provided with a second sliding block (41), the operation platform (1) is provided with a first sliding rail (11) and a second sliding rail (12), the first sliding block (31) of the first accessory preloading block (3) is slidably connected with the first sliding rail (11), and the second sliding block (41) of the second accessory preloading block (4) is slidably connected with the second sliding rail (12).

3. A rear blade mounting arrangement according to claim 1, wherein, The operation platform (1) is provided with a first pushing mechanism (6) and a second pushing mechanism (7), the first pushing mechanism (6) is connected with the first accessory preloading block (3) to drive the first accessory preloading block (3) to slide, and the second pushing mechanism (7) is connected with the second accessory preloading block (4) to drive the second accessory preloading block (4) to slide.

4. A rear blade mounting arrangement according to claim 1, wherein The operation platform (1) is provided with a first column (13) and a pressing block (14), the first column (13) is installed on the operation platform (1), the pressing block (14) is rotationally connected with the first column (13), and the pressing block (14) is rotationally back and forth matched with the blade profiling base (2) to clamp and limit or release the rear blade (5).

5. A rear vane mounting arrangement according to claim 4, wherein One end of the pressing block (14) is rotationally connected with the first column (13), the other end of the pressing block (14) is provided with a positioning column (15), the blade profiling base (2) is provided with a positioning groove (21) matched with the positioning column (15), and the positioning column (15) and the positioning groove (21) abut to limit the rotation range of the pressing block (14).

6. A rear blade mounting arrangement according to claim 1, wherein The first accessory preloading block (3) is provided with a first mounting groove (32) matched with a rear blade support rod (8), the second accessory preloading block (4) is provided with a second mounting groove (42) matched with the rear blade support rod (8), and the first mounting groove (32) and the second mounting groove (42) are used for mounting the rear blade support rod (8).

7. A rear vane mounting arrangement according to claim 6, wherein The first accessory preloading block (3) is provided with a third mounting groove (33) matched with a rear blade linkage rod (9), and the third mounting groove (33) is used for mounting the rear blade linkage rod (9).

8. A rear vane mounting arrangement according to claim 7, wherein The plane where the third mounting groove (33) is located is higher than the plane where the first mounting groove (32) is located, and the third mounting groove (33) is closer to the blade profiling base (2) than the first mounting groove (32).

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