Conical-cylindrical spring grinding device with automatic feeding and discharging structure
The tapered spring grinding device with automatic loading and unloading structure solves the problem of manually distinguishing end face deviations in tapered spring processing, realizes automated processing, improves grinding efficiency and accuracy, and meets the needs of mass production.
Patent Information
- Application Number
- CN202422643857.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The existing process for machining tapered cylindrical springs involves manually distinguishing end face deviations, which results in the parallelism not meeting the requirements after grinding, and the machining efficiency is low, making it impossible to meet the needs of mass production.
A conical spring grinding device with an automatic loading and unloading structure was designed. The device automatically distinguishes between the large and small ends through a vibratory plate, a U-shaped groove, a screening pipe, and a non-continuous feeding component. Combined with the grinding component and the unloading component, the device uses air pressure difference to achieve automatic loading and unloading, ensuring the accurate positioning and separation of the conical spring during the grinding process.
The automated processing of tapered springs has been achieved, improving grinding efficiency and precision, ensuring the grinding quality of both the large and small ends, meeting the needs of mass production, and enhancing the production efficiency of automotive shock absorber components.
Smart Images
Figure CN223762837U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of spring double-end face grinding machine technology, specifically to a conical spring grinding device with an automatic loading and unloading structure. Background Technology
[0002] The tapered cylindrical spring has a shape where one end has a larger diameter than the other, meaning the larger end has a larger diameter than the smaller end. This gives the tapered cylindrical spring a non-linear characteristic under compression; its stiffness gradually increases with increasing compression. This makes it very useful in specific applications, such as automotive shock absorbers, where a large load-bearing capacity is required within a limited space. Secondly, after manufacturing, the two ends of the tapered cylindrical spring need to be ground to remove burrs, ensuring flatness and parallelism, thereby improving the spring's performance and service life.
[0003] The existing processing of tapered springs involves manually separating the large and small ends and fixing them on a grinding machine. However, there are installation deviations during the process of fixing the tapered springs by the operators, which makes it impossible for the parallelism after grinding to meet production requirements. In addition, this processing method is inefficient and cannot meet the needs of mass production of tapered springs, thus reducing the overall production efficiency of automobiles. Utility Model Content
[0004] This utility model addresses the problem of automatic loading and unloading during the grinding of conical springs by providing a conical spring grinding device with an automatic loading and unloading structure. The specific technical solution is as follows:
[0005] A grinding device for a conical spring with an automatic loading and unloading structure, wherein the two ends of the conical spring are a large end and a small end, and the diameter of the large end is larger than the diameter of the small end, includes: a loading assembly forming a hollow pipe with a diameter between the diameter of the large end and the diameter of the small end of the conical spring; a feeding assembly for storing and distributing the conical spring flowing out from the loading assembly; a grinding assembly for grinding the large end face and the small end face of the conical spring; and an unloading assembly connected to the grinding assembly, which is capable of creating an air pressure difference to apply suction to the conical spring.
[0006] Furthermore, the feeding assembly includes: a vibratory plate that moves a conical spring placed inside it by vibration; a U-shaped groove connected to the vibratory plate that can accommodate the conical spring, and the conical spring moves along the side of the U-shaped groove under the movement of the vibratory plate; and a screening pipe with one end connected to the U-shaped groove, the other end of which is connected to the feeding assembly. The connection between the screening pipe and the U-shaped groove is a hollow pipe, and the screening pipe can prevent the large end of the conical spring from entering the hollow pipe before its small end.
[0007] Furthermore, it also includes a feeding assembly comprising: a feeding pipe connected to the discharge port of the feeding assembly; a discontinuous feeding member connected to the end of the feeding pipe away from the discharge port, wherein a conical spring enters the interior of the discontinuous feeding member along the feeding pipe, the discontinuous feeding member forming a structure for storing and distributing the conical spring; and a positioning post connected to the end of the discontinuous feeding member away from the feeding pipe, the axis of the positioning post being parallel to the axis of the discontinuous positioning member, and the axis of the positioning post being parallel to the axis of the conical spring placed inside the grinding assembly.
[0008] Preferably, the discontinuous feeding component includes: an internal cavity for storing a tapered spring, the axis of which is parallel to the axis of the positioning post; a limiting member one disposed at the middle position of the internal cavity, the limiting member one being able to restrict the movement of the tapered spring stored in the internal cavity toward the grinding assembly; and a limiting member two disposed at one end of the internal cavity near the grinding assembly, the limiting member two and the limiting member one alternately restricting the movement of the tapered spring in the internal cavity toward the grinding assembly.
[0009] Preferably, the grinding assembly includes: a rotatable grinding disc, the side of which near the feeding assembly is its top surface, the top surface of which is perpendicular to the axis of the feeding assembly; a grinding wheel disposed on the top and bottom surfaces of the grinding disc, the grinding surface of which coincides with the top and bottom surfaces of the grinding disc; a fixing hole formed on the grinding disc, the diameter of the circle intersecting the top surface of the grinding disc is larger than the diameter of the circle intersecting the bottom surface of the grinding disc, the axis of the fixing hole can coincide with the axis of the feeding assembly, and the side surface of the fixing hole is parallel to the side surface of the conical spring; and a positioning hole formed on the grinding disc, the axis of which is parallel to the axis of the fixing hole, the position of the positioning hole relative to the fixing hole is fixed, and the position of the positioning hole relative to the discontinuous feeding component is fixed.
[0010] Preferably, the feeding assembly includes: an air intake connected to the grinding assembly, wherein the air pressure at the air intake is lower than atmospheric pressure; and a vacuum pump connected to the air intake via an air intake pipe.
[0011] Preferably, the device further includes a mounting bracket, which comprises: a feeding component fixing bracket for fixing the feeding assembly; and a pipe fixing bracket for fixing the unloading assembly.
[0012] As can be seen from the above technical solution, this utility model has the following beneficial effects:
[0013] This invention achieves automatic separation of the large and small ends of a conical spring by setting a screening tube, automatically feeding the conical spring into the grinding disc for grinding by setting a non-continuous feeding component, and automatically separating the conical spring from the grinding disc by setting an air intake to adsorb the conical spring, thereby achieving automatic unloading, improving the grinding efficiency of the large and small ends of the conical spring, and thus realizing the mass production of conical springs. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0015] Figure 2 The top view of the U-shaped trough and the screening tube, and the perspective view showing the placement of the conical spring;
[0016] Figure 3 This is a cross-sectional view of a non-continuous feeder.
[0017] In the diagram: 1. Feeding assembly; 2. Feeding component; 3. Grinding assembly; 4. Unloading assembly; 5. Mounting bracket; 11. Vibratory feeder; 12. U-shaped groove; 13. Screening pipe; 14. Discharge port; 21. Feeding pipe; 22. Non-continuous feeding component; 221. Internal cavity; 222. Limiting component one; 223. Limiting component two; 23. Positioning column; 31. Grinding disc; 32. Grinding wheel; 33. Fixing hole; 34. Positioning hole; 41. Air intake port; 42. Air intake pipe; 43. Vacuum pump; 51. Feeding component fixing bracket; 52. Pipe fixing bracket. Detailed Implementation
[0018] 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.
[0019] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0020] like Figure 1 As shown, the conical spring processed by this utility model has two ends, a large end and a small end, with the diameter of the large end being larger than that of the small end. This embodiment includes: a feeding assembly 1, which forms a hollow pipe with a diameter between the diameter of the large end and the diameter of the small end of the conical spring; a feeding assembly 2 for storing and distributing the conical spring flowing out from the feeding assembly 1; a grinding assembly 3 for grinding the large end face and the small end face of the conical spring; and a discharging assembly 4 connected to the grinding assembly 3, which can create an air pressure difference to apply suction to the conical spring.
[0021] Specifically, the conical spring enters through the feed inlet of the feeding assembly 1, then moves through the hollow pipe to the feeding assembly 2, and then enters the grinding assembly 3 for end face grinding. Finally, the unloading assembly 4 removes it from the grinding assembly 3 and sends it to the next process in the production of the conical spring. When the conical spring moves from the feed inlet of the feeding assembly 1 to the hollow pipe, if the large end of the spring contacts the hollow pipe first, it cannot enter because the diameter of the hollow pipe is smaller than the diameter of its large end. If the small end of the spring contacts the hollow pipe first, it can enter because the diameter of the hollow pipe is larger than the diameter of its small end. Subsequent conical springs continuously push the springs that have entered the hollow pipe, enabling the feeding assembly 1 to automatically distinguish between the large and small ends of the springs and ensuring that the direction from the large end to the small end of the springs entering the feeding assembly 2 is always its direction of movement, thus achieving automatic feeding and automatic differentiation between the large and small ends of the conical springs. More specifically, in this embodiment, the diameter of the hollow pipe is 0.2-0.3 mm smaller than the diameter of the large end of the conical spring, so that it can both distinguish the conical spring and increase its moving speed.
[0022] Secondly, during the movement of the conical spring, its small end points towards the feeding assembly 2. The feeding assembly 2 restricts the movement of the conical spring towards the grinding assembly 3, thereby allocating the time and quantity of the conical spring entering the grinding assembly 3 for grinding. When the grinding position of the grinding assembly 3 is aligned with the feeding assembly 2, the feeding assembly 2 releases the conical spring, allowing the conical spring to accurately enter the grinding position of the grinding assembly 3, thereby improving the grinding accuracy of the grinding assembly 3 and realizing automatic feeding and automatic grinding of the conical spring.
[0023] Secondly, as is commonly known, the grinding tool of the grinding component 3 is a grinding machine. During the rotation of the grinding machine, the conical spring is ground and transported to the unloading component 4. The unloading component 4 creates low pressure on the large end face of the ground conical spring, so that atmospheric pressure squeezes the conical spring to the unloading component 4, thereby realizing its automatic unloading.
[0024] Combination Figure 2 As shown, the feeding assembly 1 includes: a vibrating plate 11, which moves a conical spring placed inside by vibration; a U-shaped groove 12 connected to the vibrating plate 11, which can accommodate the conical spring, and the conical spring moves along the side of the U-shaped groove 12 under the movement of the vibrating plate 11; and a screening pipe 13 with one end connected to the U-shaped groove 12, the other end of which is connected to the feeding assembly 2. The connection part between the screening pipe 13 and the U-shaped groove 12 is a hollow pipe, and the screening pipe 13 can prevent the large end of the conical spring from entering the hollow pipe before its small end.
[0025] Specifically, a conical spring is placed in a vibrating plate 11. The vibrating plate 11 moves the conical spring into a U-shaped groove 12 through vibration. The open end of the U-shaped groove 12 faces the center of the vibrating plate 11 to facilitate the entry of the conical spring. The bottom edge of the U-shaped groove 12 is the side edge of the vibrating plate 11, providing support for the conical spring. During this process, the conical spring continuously pushes the spring entering the U-shaped groove 12 along the bottom edge of the U-shaped groove 12, thereby continuously contacting the screening tube 13. The part of the screening tube 13 that contacts the U-shaped groove 12 is a hollow pipe, which prevents the conical spring from entering the U-shaped groove 12. The large end of the conical spring enters the interior of the screening tube 13, but the small end of the conical spring, whose large end points to the small end in the same direction as the moving direction, will enter the screening tube 13 first, and then be pushed by the subsequent conical spring to leave the screening tube 13 from the discharge port 14 of the feeding assembly 1; and the small end of the conical spring, whose large end points to the small end in the opposite direction to the moving direction, does not enter the screening tube 13 before the large end. Under the push of the subsequent conical spring, it will re-enter the vibrating plate 11, and then re-enter the U-shaped groove 12 and the screening tube 13 for screening, so as to realize the automatic differentiation of the large end and the small end by the conical spring.
[0026] Furthermore, this embodiment also includes a feeding assembly 2, which includes: a feeding pipe 21 connected to the discharge port 14 of the feeding assembly 1; a discontinuous feeding member 22 connected to the end of the feeding pipe 21 away from the discharge port 14, wherein a conical spring enters the interior of the discontinuous feeding member 22 along the feeding pipe 21, and the discontinuous feeding member 22 forms a structure for storing and distributing the conical spring; and a positioning post 23 connected to the end of the discontinuous feeding member 22 away from the feeding pipe 21, wherein the axis of the positioning post 23 is parallel to the axis of the discontinuous positioning member, and the axis of the positioning post 23 is parallel to the axis of the conical spring placed inside the grinding assembly 3.
[0027] Specifically, the discharge port 14 of the feeding component 1 is located at the end of the screening pipe 13 away from the U-shaped groove 12, and its vertical height is higher than that of the discontinuous feeding component 22. This allows the conical spring entering the feeding pipe 21 through the discharge port 14 to enter the interior of the discontinuous feeding component 22 under the push of gravity and subsequent conical springs. This allows the discontinuous feeding component 22 to control the movement of the conical spring inside by controlling the opening and closing of its own internal opening end, thereby automatically feeding the conical spring into the grinding component 3. Furthermore, when the conical spring inside the discontinuous feeding component 22 is not fed into the grinding component 3, the conical spring in the vibrating plate 11 can no longer be squeezed into the U-shaped groove 12.
[0028] Secondly, the positioning post 23 is fixedly connected to the non-continuous feeding part 22, and the positioning post 23 can move relative to the grinding assembly 3 under the drive of the cylinder, so that the relative position of the positioning post 23 and the grinding assembly 3 is the relative position of the non-continuous feeding part 22 and the grinding assembly 3. The axes of the positioning post 23, the non-continuous feeding part 22 and the conical spring placed in the grinding assembly 3 are all parallel, so that when the positioning post 23 is pushed into the grinding assembly 3 by the cylinder, the relative position of the axis of the non-continuous feeding part 22 and the conical spring placed in the grinding assembly 3 is determined.
[0029] like Figure 3 As shown, the discontinuous feeder 22 includes: an internal cavity 221 for storing a tapered spring, the axis of which is parallel to the axis of the positioning post 23; a limiting member 222 disposed at the middle position of the internal cavity 221, the limiting member 222 being able to restrict the movement of the tapered spring stored in the internal cavity 221 toward the grinding assembly 3; and a limiting member 223 disposed at one end of the internal cavity 221 near the grinding assembly 3, the limiting member 223 and the limiting member 222 alternately restricting the movement of the tapered spring in the internal cavity 221 toward the grinding assembly 3.
[0030] Specifically, the conical spring moves along the side of the internal cavity 221. The movement direction of the first limiting member 222 and the second limiting member 223, driven by the cylinder, forms an angle with the side of the internal cavity 221, preferably 90 degrees, and both can extend into the internal cavity 221. This allows the first limiting member 222 and the second limiting member 223 to change the size of the cross-section of the internal cavity 221. When the two conical springs successively enter the upper and lower parts of the internal cavity 221, the second limiting member 223 moves towards the internal cavity 221, thereby restricting the movement of the conical spring towards the grinding assembly 3. When the second limiting member... When the tapered spring moves toward the grinding assembly 3 away from the internal cavity 221, the first limiting member 222 moves toward the internal cavity 221, thereby restricting the upper tapered spring from moving toward the grinding assembly 3 along with the lower tapered spring. When the lower tapered spring leaves the internal cavity 221, the second limiting member 223 moves toward the internal cavity 221, and the first limiting member 222 moves away from the internal cavity 221, causing the upper tapered spring to fall downwards. The second limiting member 223 restricts its continued fall, and the tapered spring in the feeding pipe 21 falls into the upper part of the internal cavity 221.
[0031] Furthermore, the grinding assembly 3 includes: a rotatable grinding disc 31, the side of which near the feeding assembly 2 is its top surface, and the top surface of the grinding disc 31 is perpendicular to the axis of the feeding assembly 2; a grinding wheel 32 disposed on the top and bottom surfaces of the grinding disc 31, the grinding surface of which coincides with the top and bottom surfaces of the grinding disc 31; a fixing hole 33 formed on the grinding disc 31, the diameter of the circle intersecting the top surface of the fixing hole 33 with the top surface of the grinding disc 31 is larger than the diameter of the circle intersecting the bottom surface of the grinding disc 31, the axis of the fixing hole 33 can coincide with the axis of the feeding assembly 2, and the side surface of the fixing hole 33 is parallel to the side surface of the conical spring; and a positioning hole 34 formed on the grinding disc 31, the axis of the positioning hole 34 being parallel to the axis of the fixing hole 33, the position of the positioning hole 34 relative to the fixing hole 33 being fixed, and the position of the positioning hole 34 relative to the discontinuous feeding member 22 being fixed.
[0032] Specifically, when the axis of the positioning pin 23 coincides with the axis of the positioning hole 34, the side of the conical spring is parallel to the side of the fixing hole 33. After the conical spring falls into the fixing hole 33, it automatically centers. The axis of the conical spring stored in the internal cavity 221 coincides with the axis of the fixing hole 33. The limiting member 223 opens the restriction on the conical spring, allowing it to enter the fixing hole 33. Because the diameter of the small end of the conical spring is larger than the diameter of the intersection circle of the bottom surface of the fixing hole 33, the grinding disc 31 applies a supporting force to the conical spring through the internal inclined side of the fixing hole 33, thereby restricting its movement relative to the grinding disc 31. As a result, the grinding disc 31 drives it to move relative to the grinding wheel 32 during rotation, so that the grinding wheel 32 can continuously grind the two ends of the conical spring, making its two ends parallel to the top and bottom surfaces of the grinding disc 31, thereby improving the parallelism and flatness of its two ends.
[0033] Furthermore, the feeding assembly 4 includes: an air intake 41 connected to the grinding assembly 3, wherein the air pressure at the air intake 41 is lower than atmospheric pressure; and a vacuum pump 43 connected to the air intake 41 via an air intake pipe 42.
[0034] Specifically, the vacuum pump 43 creates low pressure in the gap between the suction port 41 and the grinding disc 31 through the suction pipe 42, so that the atmospheric pressure pushes the conical spring in the fixing hole 33 to move towards the suction port 41, and then is attracted by the suction port 41 to move to the next processing step of the conical spring.
[0035] Furthermore, this embodiment also includes a mounting bracket 5, which includes: a feeding component fixing bracket 51 for fixing the feeding assembly 2; and a pipe fixing bracket 52 for fixing the unloading assembly 4.
[0036] Specifically, the feeding component fixing frame 51 can fix the positioning column 23 and the discontinuous feeding component 22 by bolt connection, so that the relative position of the axis of the positioning column 23 and the discontinuous feeding component 22 is fixed. As a result, when the axis of the positioning column 23 coincides with the axis of the positioning hole 34, the conical spring inside the discontinuous feeding component 22 coincides with the axis of the fixing hole 33, thereby ensuring the relative position of the conical spring with the grinding disc 31 after entering the fixing hole 33, and thus improving its processing accuracy.
[0037] Secondly, the pipe fixing bracket 52 fixes the air intake pipe 42 and the air intake port 41 by bolt connection, so that the relative position of the air intake port 41 with the grinding disc 31 is fixed, thereby enabling the air intake port 41 to be aligned with the fixing hole 33 to adsorb the conical spring.
[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
[0039] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.
Claims
1. A conical cylindrical spring grinding device with automatic feeding and discharging structure, both ends of the conical cylindrical spring are large end and small end, the diameter of the large end is larger than that of the small end, characterized in that, The application relates to a device for grinding the big end face and the small end face of a conical cylindrical spring. The device comprises: a feeding assembly (1) which forms a hollow pipe with a diameter between the big end diameter and the small end diameter of the conical cylindrical spring, the feeding assembly (1) comprising: a vibrating disc (11) which moves the conical cylindrical spring placed in the vibrating disc (11) through vibration; a U-shaped groove (12) connected with the vibrating disc (11), the U-shaped groove (12) being capable of accommodating the conical cylindrical spring, and the conical cylindrical spring moving along the side edge of the U-shaped groove (12) under the movement of the vibrating disc (11); and a screening pipe (13) connected with one end of the U-shaped groove (12), the other end of the screening pipe (13) being connected with a feeding assembly (2), the connected part of the screening pipe (13) and the U-shaped groove (12) being the hollow pipe, and the screening pipe (13) being capable of preventing the big end of the conical cylindrical spring from entering the hollow pipe before the small end of the conical cylindrical spring; a feeding assembly (2) for storing and distributing the conical cylindrical spring flowing out of the feeding assembly (1), the feeding assembly (2) comprising: a feeding pipe (21) connected with the discharge port (14) of the feeding assembly (1); a discontinuous feeding member (22) connected with the end of the feeding pipe (21) away from the discharge port (14), the conical cylindrical spring entering the interior of the discontinuous feeding member (22) along the feeding pipe (21), and the discontinuous feeding member (22) forming a structure for storing and distributing the conical cylindrical spring; and a positioning column (23) connected with the end of the discontinuous feeding member (22) away from the feeding pipe (21), the axis of the positioning column (23) being parallel to the axis of the discontinuous feeding member, and the axis of the positioning column (23) being parallel to the axis of the conical cylindrical spring placed in the interior of a grinding assembly (3); a grinding assembly (3) for grinding the big end face and the small end face of the conical cylindrical spring; and 2. The cone and cylinder spring grinding apparatus of claim 1, wherein: a discharging assembly (4) connected with the grinding assembly (3), the discharging assembly (4) being capable of forming a pressure difference to exert suction force on the conical cylindrical spring. The discontinuous feeding member (22) comprises: an internal cavity (221) for storing the conical cylindrical spring, the axis of the internal cavity (221) being parallel to the axis of the positioning column (23); a limiting member I (222) arranged at the middle position of the internal cavity (221), the limiting member I (222) being capable of limiting the movement of the conical cylindrical spring stored in the internal cavity (221) to the grinding assembly (3); and 3. The cone-on-post spring grinding apparatus of claim 1, wherein: a limiting member II (223) arranged at the end of the internal cavity (221) close to the grinding assembly (3), the limiting member II (223) being capable of limiting the movement of the conical cylindrical spring in the internal cavity (221) to the grinding assembly (3) alternately with the limiting member I (222). The grinding assembly (3) comprises: a rotatable grinding disc (31), one side of the grinding disc (31) being a top surface of the grinding disc (31), and the top surface of the grinding disc (31) being perpendicular to the axis of the feeding assembly (2); A grinding wheel (32) is arranged on the top surface and bottom surface of the grinding disc (31), and the grinding surface of the grinding wheel (32) coincides with the top surface and bottom surface of the grinding disc (31); A fixing hole (33) is formed on the grinding disc (31), the diameter of the circle intersecting with the top surface of the grinding disc (31) is greater than the diameter of the circle intersecting with the bottom surface of the grinding disc (31), the axis of the fixing hole (33) can coincide with the axis of the feeding assembly (2), and the side surface of the fixing hole (33) is parallel to the side surface of the conical cylindrical spring; and A positioning hole (34) is formed on the grinding disc (31), the axis of the positioning hole (34) is parallel to the axis of the fixing hole (33), the position of the positioning hole (34) relative to the fixing hole (33) is fixed, and the position of the positioning hole (34) relative to the discontinuous feeding member (22) is fixed.
4. The cone-on-post spring grinding apparatus of claim 1, wherein: The feeding assembly (4) comprises: An air suction port (41) connected with the grinding assembly (3), the air pressure at the air suction port (41) is lower than the atmospheric pressure; and A vacuum pump (43) connected with the air suction port (41) through an air suction pipeline (42).
5. The cone-on-post spring grinding apparatus of claim 1, wherein: Further comprising a mounting bracket (5), the mounting bracket (5) comprises a feeding member fixing frame (51) for fixing the feeding assembly (2) and a pipeline fixing frame (52) for fixing the feeding assembly (4).