A multi-angle positioning milling fixture for exhaust manifolds
By combining the lifting components with the column and employing an adaptive clamping structure, the problem of multi-angle positioning of the exhaust manifold was solved, enabling efficient and stable milling operations and improving machining accuracy and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 云南大姚祥华工业制造股份公司
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-26
AI Technical Summary
Existing fixtures are difficult to use for precise positioning in multiple angles and directions when milling exhaust manifolds, resulting in large cumulative errors. Furthermore, they lack stability under high-frequency vibration and high cutting force conditions, affecting machining accuracy and efficiency.
A multi-angle positioning milling fixture for exhaust manifolds was designed. The fixture achieves multi-angle adjustment through the vertical sliding and rotational cooperation between the lifting component and the column, combined with locking bolts. It also adopts an adaptive clamping structure, including springs and pads, to enhance stability. The lead screw in the drive component is automatically adjusted to reduce human error.
It enables multi-faceted and multi-directional milling of exhaust manifolds, avoids cumulative errors, improves machining accuracy and stability, enhances production efficiency, and ensures power performance and exhaust emission standards.
Smart Images
Figure CN224274163U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive exhaust manifold processing technology, specifically to a multi-angle positioning milling fixture for exhaust manifolds. Background Technology
[0002] In the automotive engine manufacturing industry, the exhaust manifold, as a core component connecting the engine cylinders and exhaust pipes, directly affects the engine's power performance and exhaust emission standards through its machining accuracy. Due to the complex structure of the exhaust manifold, which typically includes multiple branch pipes and irregular curved surfaces, precise multi-angle positioning is required during milling to ensure the machining accuracy of each port and mounting surface. However, existing fixture technology has many limitations and cannot meet the demands of efficient machining under complex working conditions.
[0003] Taking the "Exhaust Manifold Welding Fixture" disclosed in Chinese Patent Application No. 201510575242.8 as an example, this fixture fixes the bottom of the exhaust manifold through a clamping device on the operating platform, and uses a circular top pressure plate on the back plate and a clamping workpiece to press and clamp the manifold. However, this solution has obvious shortcomings: First, its positioning method is only for the bottom and side wall of the exhaust manifold, lacking the ability to adjust the manifold at multiple angles and directions, making it difficult to adapt to the cutting requirements of different angles in milling, resulting in cumulative errors when clamping multiple times; Second, the structure of the circular top pressure plate and the clamping workpiece is fixed, and it cannot adaptively fit according to the irregular shape of the manifold surface. During the milling process, uneven local force may cause the workpiece to shake, affecting the machining accuracy and surface quality; Third, this fixture is mainly suitable for welding processes, and does not consider the high-frequency vibration and large cutting force conditions in milling, lacking effective damping and stabilization structures, and cannot guarantee the stability of the machining process.
[0004] With the automotive manufacturing industry's increasing demands for production efficiency and machining precision of exhaust manifolds, there is an urgent need for a milling fixture that can achieve flexible multi-angle positioning, adaptive clamping, and good stability to solve the problems of low positioning efficiency, poor accuracy, and insufficient applicability in existing technologies. Utility Model Content
[0005] The purpose of this utility model is to provide a multi-angle positioning milling fixture for exhaust manifolds, in order to solve the problem mentioned in the background art, which only targets the bottom and side walls of the exhaust manifold, lacks the ability to adjust the manifold at multiple angles and directions, is difficult to adapt to the cutting requirements of different angles in milling, and easily causes cumulative errors when clamping multiple times.
[0006] To achieve the above objectives, this utility model provides a multi-angle positioning milling fixture for exhaust manifolds, including a driving component. A column is symmetrically mounted on the top of the driving component. A lifting component is vertically slidably arranged on the column. A clamping component is mounted on the lifting component. A sleeve is vertically arranged on one side of the lifting component. The sleeve is vertically slidably engaged with the column and can be rotated on the column to adjust the angle, and is locked and fixed by a locking bolt.
[0007] This design uses the drive unit as the basic power unit of the fixture, with symmetrically mounted columns at its top providing support and guidance for the lifting components. The lifting components slide vertically with the columns via a sleeve, which can rotate around the columns for adjustment. This design is based on the principles of shaft-hole fit and mechanical rotation. When angle adjustment is needed, the locking bolt is loosened, allowing the sleeve to rotate freely; after adjusting to the target angle, the locking bolt is tightened, using the bolt's tightening force to fix the sleeve to the columns, thus locking the angle.
[0008] Preferably, a locking opening is provided on the other side surface of the sleeve, and the clamping component includes a push rod that passes through the locking opening and is fitted with a top plate. The top plate is used to press and position the side of the exhaust manifold.
[0009] This design features a locking port on the other side of the sleeve, providing a through-hole for the push rod. The push rod passes through the locking port and is fitted with the top plate, forming a clamping component. When it is necessary to clamp the exhaust manifold, the push rod is operated to move the top plate towards the side of the exhaust manifold. The contact pressure between the top plate and the side of the exhaust manifold is used to achieve positioning and clamping, similar to the principle of levers and pressure transmission.
[0010] Preferably, a spring is installed between the back of the top plate and the outer wall of the lifting component.
[0011] This feature involves installing a spring between the back of the top plate and the outer wall of the lifting component, utilizing the elastic deformation characteristics of the spring. When the top plate is pushed by an external force to press against the exhaust manifold, the spring is compressed, generating elastic force. When there are irregular protrusions or depressions on the surface of the exhaust manifold, the elastic force of the spring can cause the top plate to automatically adjust its position, maintaining stable clamping of the workpiece.
[0012] Preferably, a handle is installed at the end of the top rod away from the top plate.
[0013] This feature includes a handle installed at the end of the push rod furthest from the top plate. Based on ergonomic principles, the handle provides the operator with a point of leverage. By gripping the handle, the operator can push or pull the push rod more easily and effortlessly, thereby controlling the movement of the top plate and enabling the clamping and releasing of the exhaust manifold.
[0014] Preferably, the top plate includes a fixing plate, which is rotatably connected to a clamping plate via a hinge. The clamping plate is capable of fine-tuning its angle to ensure a close fit on the irregular surface of the exhaust manifold.
[0015] This design features a top plate with a fixed plate and a pressure plate connected by a hinge. When the pressure plate contacts the irregular surface of the exhaust manifold, it can rotate around the hinge under contact pressure, automatically adjusting its angle to ensure a tight fit with the exhaust manifold surface, utilizing the rotational principle of the hinge connection.
[0016] Preferably, a soft pad is installed on the front side of the clamping plate.
[0017] This feature involves mounting a soft pad on the front of the clamping plate. The pad is typically made of a material with a high coefficient of friction and elasticity. When the clamping plate contacts the surface of the exhaust manifold, the pad fills the tiny gaps through its elastic deformation, while the rough texture of its surface increases the friction with the workpiece surface, thereby achieving stable clamping.
[0018] Preferably, the driving component includes a housing, inside which a lead screw is provided. The lead screw is divided into two sections with opposite thread directions, and each section is equipped with a lead screw slider. One end of the lead screw is driven to rotate by a drive motor, and the top of the lead screw slider is connected and fixed to the bottom of the column.
[0019] This configuration incorporates a lead screw within the housing of the drive component. The lead screw employs a two-section structure with opposite thread directions, each section housing a lead screw slider. When the drive motor rotates the lead screw, based on the principle of helical transmission, the two lead screw sliders move in opposite directions along the lead screw, thereby synchronously adjusting the spacing of the top-connected column and achieving automated adjustment.
[0020] Preferably, the bottom of the drive component is equipped with an anti-slip pad.
[0021] This feature involves installing an anti-slip pad at the bottom of the drive unit. The anti-slip pad is typically made of a material with a high coefficient of friction, such as rubber. When the fixture is placed on the machine tool worktable, the anti-slip pad is in close contact with the worktable surface. Utilizing the principle of friction, this increases the friction between the fixture and the worktable, preventing the fixture from shifting during milling due to cutting forces, vibrations, or other factors.
[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0023] In this multi-angle positioning milling fixture for exhaust manifolds, the angle can be adjusted by the vertical sliding and rotational cooperation between the sleeve of the lifting component and the column, and can be quickly fixed by locking bolts. This meets the milling needs of the exhaust manifold from multiple sides and directions. It avoids the cumulative error caused by multiple clamping, significantly improves the machining accuracy of each port and mounting surface, and effectively ensures the power performance and exhaust emission standards of the engine after assembly.
[0024] The adaptive clamping design enhances processing stability. The top plate, with its hinged connection between the fixed plate and the pressure plate, combined with spring cushioning, automatically adjusts its angle to accommodate the irregular curves of the exhaust manifold, achieving a tight fit. Simultaneously, the soft pad on the front of the pressure plate further increases friction and protects the workpiece surface, effectively preventing workpiece wobbling caused by uneven localized force. Compared to the fixed circular top pressure plate in the comparison document, this significantly improves processing stability and workpiece surface quality.
[0025] Automated drive adjustment improves clamping efficiency. The lead screw inside the drive component adopts a two-section structure with opposite thread directions. Driven by a drive motor, its rotation can be synchronously controlled to adjust the spacing of the column, enabling rapid clamping of exhaust manifolds of different sizes. Compared with traditional manually adjustable fixtures, this automated design significantly shortens clamping time, reduces human error, and significantly improves production efficiency. At the same time, the anti-slip pad at the bottom of the drive component enhances the stability of the fixture and the worktable, further ensuring the reliability of the machining process. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a schematic diagram of the drive component in this utility model;
[0028] Figure 3 This is a schematic diagram of the lifting component in this utility model;
[0029] Figure 4 This is a schematic diagram of the clamping component in this utility model;
[0030] Figure 5 This is a schematic diagram of the top plate structure in this utility model;
[0031] The meanings of the labels in the diagram are as follows:
[0032] 1. Drive component; 11. Housing; 12. Lead screw; 13. Lead screw slider; 14. Drive motor; 2. Column; 3. Lifting component; 31. Sleeve; 32. Locking port; 33. Locking bolt; 4. Clamping component; 41. Top rod; 42. Top plate; 421. Fixing plate; 422. Pressure plate; 423. Hinge; 424. Soft pad; 43. Spring; 44. Handle; 5. Anti-slip pad. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] This utility model provides a multi-angle positioning milling fixture for exhaust manifolds, such as... Figure 1 , Figure 3 As shown, it includes a drive component 1, a column 2 symmetrically mounted on the top of the drive component 1, a lifting component 3 vertically slidably mounted on the column 2, a clamping component 4 mounted on the lifting component 3, and a sleeve 31 vertically mounted on one side of the lifting component 3. The sleeve 31 is vertically slidably engaged with the column 2 and can be rotated on the column 2 to adjust the angle, and is locked and fixed by a locking bolt 33.
[0035] The drive unit 1 serves as the basic power unit of the fixture, with symmetrically mounted columns 2 on its top providing support and guidance for the lifting unit 3. The lifting unit 3 forms a vertical sliding fit with the column 2 through a sleeve 31, while the sleeve 31 can rotate around the column 2 for adjustment. This design is based on the principle of shaft-hole fit and mechanical rotation. When the angle needs to be adjusted, the locking bolt 33 is loosened, allowing the sleeve 31 to rotate freely; after adjusting to the target angle, the locking bolt 33 is tightened, using the bolt's tightening force to fix the sleeve 31 to the column 2, achieving angle locking. This structure enables the fixture to have multi-angle adjustment capabilities, adapting to the milling needs of different branch pipes and mounting surfaces of the exhaust manifold. It eliminates the need for multiple disassembly and re-clamping of the workpiece, reducing errors caused by repeated positioning and significantly improving machining accuracy and production efficiency. Simultaneously, the multi-angle adjustment function broadens the fixture's applicability, meeting the machining requirements of various exhaust manifold models and reducing equipment procurement costs for enterprises.
[0036] In this embodiment, as Figure 3 , Figure 4 As shown, a locking opening 32 is provided on the other side surface of the sleeve 31. The clamping component 4 includes a push rod 41, which passes through the locking opening 32 and is fitted with a top plate 42. The top plate 42 is used to press and position the side of the exhaust manifold.
[0037] The locking port 32 on the other side of the sleeve 31 provides a through channel for the push rod 41. The push rod 41 passes through the locking port 32 and is mounted on the top plate 42, forming the clamping component 4. When it is necessary to clamp the exhaust manifold, the push rod 41 is operated to move the top plate 42 toward the side of the exhaust manifold. The contact pressure between the top plate 42 and the side of the exhaust manifold is used to achieve positioning and clamping, which is similar to the lever and pressure transmission principle. This design achieves precise clamping and positioning of the side of the exhaust manifold, ensuring that the workpiece remains stable during milling and avoiding machining deviations caused by displacement. At the same time, the independent clamping component 4 can be flexibly adjusted according to the specific shape and size of the exhaust manifold, enhancing the adaptability of the fixture to exhaust manifolds with different structures.
[0038] Specifically, such as Figure 4 As shown, a spring 43 is installed between the back of the top plate 42 and the outer wall of the lifting component 3.
[0039] A spring 43 is installed between the back of the top plate 42 and the outer wall of the lifting component 3, utilizing the elastic deformation characteristics of the spring. When the top plate 42 is subjected to an external force, such as the pusher rod 41, to press against the exhaust manifold, the spring 43 is compressed, generating elastic force. When there are irregular protrusions or depressions on the surface of the exhaust manifold, the elastic force of the spring 43 allows the top plate 42 to automatically adjust its position, maintaining stable clamping of the workpiece. The spring 43 provides the clamping component 4 with an elastic buffer function, enabling it to adaptively conform to the irregular surface of the exhaust manifold, avoiding problems such as excessive local pressure or insecure clamping caused by rigid clamping. This not only improves the stability and reliability of workpiece clamping but also effectively protects the surface of the exhaust manifold from being damaged, improving processing quality.
[0040] Furthermore, such as Figure 4 As shown, a handle 44 is installed at the end of the top rod 41 that is away from the top plate 42.
[0041] A handle 44 is installed at the end of the push rod 41 furthest from the top plate 42. Based on ergonomic principles, the handle 44 provides the operator with a point of force application. By gripping the handle 44, the operator can push or pull the push rod 41 more conveniently and effortlessly, thereby controlling the movement of the top plate 42 and achieving the clamping and releasing operation of the exhaust manifold. The design of the handle 44 significantly improves the convenience and comfort of operation, reduces the labor intensity of the operator, shortens the clamping time, and improves production efficiency. At the same time, the stable grip point allows the operator to more accurately control the movement distance and force of the push rod 41, ensuring the consistency and stability of the clamping force.
[0042] Furthermore, such as Figure 5 As shown, the top plate 42 includes a fixing plate 421, which is rotatably connected to a pressing plate 422 via a hinge 423. The pressing plate 422 can be finely adjusted in angle to ensure that it fits snugly on the irregular surface of the exhaust manifold.
[0043] The top plate 42 adopts a structure in which the fixed plate 421 and the clamping plate 422 are rotatably connected by a hinge 423. When the clamping plate 422 contacts the irregular surface of the exhaust manifold, under the action of contact pressure, the clamping plate 422 can rotate around the hinge 423, automatically adjusting its angle to ensure a tight fit with the surface of the exhaust manifold, utilizing the rotation principle of the hinge connection. This structure further enhances the adaptability of the clamping component 4 to the irregular surface of the exhaust manifold, ensuring uniform and tight fit on any shape surface, effectively improving the clamping effect and processing stability. Compared with the traditional fixed structure top plate, it can significantly reduce workpiece wobbling caused by surface misfitting, improving processing accuracy and product qualification rate.
[0044] Furthermore, such as Figure 5 As shown, a soft pad 424 is installed on the front of the clamping plate 422.
[0045] A soft pad 424 is mounted on the front of the clamping plate 422. The soft pad 424 is typically made of a material with a high coefficient of friction and elasticity. When the clamping plate 422 contacts the surface of the exhaust manifold, the soft pad 424 fills the tiny gaps through its own elastic deformation. At the same time, the rough texture of its surface increases the friction with the workpiece surface, thereby achieving stable clamping. The presence of the soft pad 424 not only further improves the reliability of clamping and prevents the exhaust manifold from slipping during milling, but also effectively protects the workpiece surface, avoiding scratches or indentations caused by direct contact with metal parts, ensuring the appearance quality and assembly performance of the exhaust manifold.
[0046] Furthermore, such as Figure 2 As shown, the driving component 1 includes a housing 11, and a lead screw 12 is provided inside the housing 11. The lead screw 12 is divided into two sections with opposite thread directions. A lead screw slider 13 is installed on both sections. One end of the lead screw 12 is driven to rotate by a drive motor 14. The top of the lead screw slider 13 is connected and fixed to the bottom of the column 2.
[0047] A lead screw 12 is installed inside the housing 11 of the drive component 1. The lead screw 12 has a two-section structure with opposite thread directions, and lead screw sliders 13 are installed on each section. When the drive motor 14 drives the lead screw 12 to rotate, according to the principle of screw transmission, the two lead screw sliders 13 will move towards or away from each other along the lead screw 12, thereby driving the top-connected columns 2 to synchronously adjust their spacing, achieving automated adjustment. This design enables the fixture to quickly clamp exhaust manifolds of different sizes. Through the automated control of the drive motor 14, the spacing of the columns 2 can be adjusted accurately and quickly without manual measurement and adjustment, significantly shortening clamping time and improving production efficiency. At the same time, automated adjustment reduces human error and ensures the consistency and stability of clamping.
[0048] Furthermore, an anti-slip pad 5 is installed on the bottom of the drive component 1.
[0049] An anti-slip pad 5 is installed at the bottom of the drive component 1. The anti-slip pad 5 is typically made of a material with a high coefficient of friction, such as rubber. When the fixture is placed on the machine tool table, the anti-slip pad 5 is in close contact with the table surface. Utilizing the principle of friction, it increases the friction between the fixture and the table, preventing displacement of the fixture due to cutting forces, vibrations, and other factors during milling. The anti-slip pad 5 significantly enhances the stability of the fixture, ensuring that it remains in a fixed position during milling, providing stable support and positioning for the workpiece. This not only improves machining accuracy but also extends the service life of the fixture and the machine tool, reducing the risk of equipment failure due to fixture instability.
[0050] When using the multi-angle positioning milling fixture for exhaust manifolds of this utility model, firstly, the drive motor 14 in the drive component 1 is started according to the size of the exhaust manifold to be processed. The drive motor 14 drives the lead screw 12 to rotate. Since the lead screw 12 adopts a two-section structure with opposite thread directions, the lead screw slider 13 installed on it will move towards or away from the lead screw 12, thereby driving the top connected column 2 to adjust the spacing synchronously. When the spacing of the column 2 is adjusted to match the size of the exhaust manifold, the drive motor 14 is stopped, and the initial width adjustment of the fixture is completed. At this time, the anti-slip pad 5 at the bottom of the drive component 1 is in close contact with the surface of the machine tool worktable, using the high coefficient of friction to increase the friction between it and the worktable, preventing the fixture from shifting during subsequent operations.
[0051] The exhaust manifold is placed on the clamp, positioned between the columns 2. The operator holds the handle 44 on the push rod 41 and pushes the push rod 41 through the locking port 32 of the sleeve 31, causing the top plate 42 to move towards the side of the exhaust manifold. The fixing plate 421 of the top plate 42 is connected to the pressure plate 422 via a hinge 423. When the pressure plate 422 contacts the irregular surface of the exhaust manifold, it rotates around the hinge 423 to automatically adjust its angle, achieving a tight fit with the surface. At the same time, the spring 43 between the back of the top plate 42 and the outer wall of the lifting component 3 is compressed during the movement of the top plate 42, generating an elastic force. This elastic force causes the top plate 42 to adaptively fit the surface of the exhaust manifold, avoiding excessive local pressure or insecure clamping caused by rigid clamping. In addition, the soft pad 424 on the front of the pressure plate 422 fills the tiny gaps through elastic deformation and increases the friction with the workpiece surface using its own rough texture, further ensuring that the exhaust manifold is stably clamped.
[0052] If the machining surface of the exhaust manifold requires a specific angle, the operator can loosen the locking bolt 33 on the sleeve 31 of the lifting component 3. At this time, the sleeve 31 can rotate freely on the column 2, and the operator can rotate the lifting component 3 together with the clamping component 4 to a suitable angle according to the machining requirements. After the angle adjustment is completed, tighten the locking bolt 33, and use the tightening force of the bolt to fix the sleeve 31 to the column 2, thereby locking the machining angle of the exhaust manifold and providing a precise positioning basis for milling.
[0053] After completing the above operations, the machine tool can start the milling program. During the milling process, due to the coordinated action of the various components of the fixture, the exhaust manifold is stably clamped and maintained at a fixed angle. The drive component 1 and the anti-slip pad 5 ensure that the entire fixture remains stable on the machine tool worktable. The clamping structure composed of spring 43, hinge 423, and soft pad 424 continuously provides a stable clamping force, adapting to the vibration and cutting force during the milling process, and ensuring the machining accuracy and surface quality of the exhaust manifold. After machining is completed, release the push rod 41, remove the machined exhaust manifold, and the next clamping and machining operation can be performed.
[0054] Finally, it should be noted that the electronic components in the drive motor 14 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between the electrical components in the above working principle to complete the electrical connection. All of these are technologies known in the art.
[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A multi-angle positioning milling fixture for exhaust manifolds, comprising a drive component (1), characterized in that: The top of the drive component (1) is symmetrically equipped with a column (2), and a lifting component (3) is vertically slidably arranged on the column (2). A clamping component (4) is installed on the lifting component (3). A sleeve (31) is vertically arranged on one side of the lifting component (3). The sleeve (31) is vertically slidably engaged with the column (2) and can be rotated on the column (2) to adjust the angle, and is locked and fixed by a locking bolt (33).
2. The multi-angle positioning milling fixture for exhaust manifolds according to claim 1, characterized in that: A locking opening (32) is provided on the other side surface of the sleeve (31). The clamping component (4) includes a push rod (41), which passes through the locking opening (32) and is fitted with a top plate (42). The top plate (42) is used to press and position the side of the exhaust manifold.
3. The multi-angle positioning milling fixture for exhaust manifolds according to claim 2, characterized in that: A spring (43) is installed between the back of the top plate (42) and the outer wall of the lifting component (3).
4. The multi-angle positioning milling fixture for exhaust manifolds according to claim 2, characterized in that: The top rod (41) has a handle (44) installed at the end away from the top plate (42).
5. The multi-angle positioning milling fixture for exhaust manifolds according to claim 2, characterized in that: The top plate (42) includes a fixing plate (421), which is rotatably connected to a pressing plate (422) via a hinge (423). The pressing plate (422) can be finely adjusted in angle to ensure that it fits on the surface of the exhaust manifold.
6. The multi-angle positioning milling fixture for exhaust manifolds according to claim 5, characterized in that: A pad (424) is installed on the front side of the clamping plate (422).
7. The multi-angle positioning milling fixture for exhaust manifolds according to claim 1, characterized in that: The driving component (1) includes a housing (11), and a lead screw (12) is provided inside the housing (11). The lead screw (12) is divided into two sections with opposite thread directions. A lead screw slider (13) is installed on both sections. One end of the lead screw (12) is driven to rotate by a drive motor (14). The top of the lead screw slider (13) is connected and fixed to the bottom of the column (2).
8. The multi-angle positioning milling fixture for exhaust manifolds according to claim 7, characterized in that: The bottom of the drive component (1) is fitted with an anti-slip pad (5).