Tool magazine structure applied to multi-channel numerical control machine tool

Abstract

The invention discloses a tool magazine structure applied to a multi-channel numerical control machine tool and relates to the technical field, the tool magazine structure comprises a bearing base and further comprises a rotating groove body arranged on the upper side of the bearing base, a bearing vertical plate is arranged on the upper side of the rotating groove body, and a driving shaft rod and a driven shaft rod are arranged on the two sides of the bearing vertical plate in a penetrating mode correspondingly; the driving shaft rod and the driven shaft rod are fixedly connected with a driving fluted disc and a driven fluted disc in a clamped and sleeved mode respectively, the driving fluted disc and the driven fluted disc are fixedly connected with a first disc body and a second disc body respectively, the edge position of the driving fluted disc and the edge position of the driven fluted disc are each rotationally connected with a plurality of sets of first rotating blocks, and first cutter sleeves are fixedly connected to the first rotating blocks in a clamped mode. A chain belt is connected between the driving fluted disc and the driven fluted disc, and a connecting belt is fixedly connected to the periphery of the chain belt in a clamped mode. According to the tool magazine structure, the space utilization rate can be increased to the maximum degree so that more tools can be contained for tool changing operation, the cost benefit is higher after long-term use, the position adjusting function of the tool magazine structure is achieved, and the tool magazine structure is suitable for tool changing operation of a multi-channel numerical control machine tool.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to a tool magazine structure applied to a multi-channel CNC machine tool. Background Art

[0002] Multi-channel CNC machine tools are high-end CNC equipment with multiple independent or collaborative machining channels. They can perform different machining tasks simultaneously on the same machine tool, making them suitable for the efficient and high-precision manufacturing of complex parts. Through multi-axis linkage, multi-task parallel processing, and intelligent control systems, these machines achieve integrated machining of multiple processes, including turning, milling, drilling, and tapping. The tool magazine structure for multi-channel CNC machine tools is an automated tool storage system designed specifically for multi-tasking, multi-channel CNC machine tools. It can efficiently manage a large number of tools to meet the continuous cutting needs of complex parts across multiple machining channels.

[0003] The patent with announcement number CN219113495U discloses a disc-type tool magazine for CNC machine tools. When the rotating rod rotates, it drives the extrusion rod to rotate around the center of the rotating rod until the extrusion rod contacts the hydraulic rod and squeezes each other, so that the hydraulic rod is subjected to force, pushing the hydraulic plate to slide to the right along the inner wall of the hydraulic chamber. After the hydraulic oil is squeezed, it enters the discharge ring through the pipeline. The oil then exerts force on the slide plate, causing the slide plate to slide outward along the inner wall of the discharge ring. After the detergent is squeezed, it is sprayed onto the tool through the discharge hole, thereby cleaning the tool and improving the quality of the workpiece processed by the tool. However, when this tool magazine structure is in use, it can usually only accommodate a small number of tools at the edge position, and the space utilization rate is relatively small, which is not conducive to long-term economic benefits. For this reason, we propose a tool magazine structure for multi-channel CNC machine tools. Summary of the Invention

[0004] The purpose of the present invention is to provide a tool magazine structure for multi-channel CNC machine tools to solve the problem that the tool magazine structure proposed in the above background technology can usually only accommodate a small number of tools at the edge position when in use, the space utilization rate is relatively small, and it is not conducive to long-term economic benefits.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A tool magazine structure for a multi-channel CNC machine tool comprises a bearing base and a rotating trough body arranged on the upper side of the bearing base, a bearing vertical plate is arranged on the upper side of the rotating trough body, a driving shaft and a driven shaft are respectively penetrated on both sides of the bearing vertical plate, a main gear disc and a driven gear disc are respectively fixedly sleeved on the driving shaft and the driven shaft, a first disc body and a second disc body are respectively fixedly connected to the main gear disc and the driven gear disc, and a plurality of first rotating blocks are rotatably connected to the edge positions of the main gear disc and the driven gear disc, and a first tool sleeve is fixedly connected to the first rotating block;

[0007] A chain belt is connected between the main gear disc and the slave gear disc, and a connecting belt is fixedly connected to the periphery of the chain belt. A plurality of groups of second rotating blocks are rotatably connected to the connecting belt, and a second knife sleeve is fixedly connected to the second rotating block.

[0008] As a further solution of the present invention: a driving motor is fixedly mounted on the top of one side of the supporting vertical plate, and the driving shaft is fixedly connected to the output end of the driving motor, and the driving shaft and the driven shaft are both movably connected to the supporting vertical plate.

[0009] As a further solution of the present invention: several groups of the first knife sleeves are distributed at equal intervals on the periphery of the first disc and the second disc, and several groups of the second knife sleeves are distributed at equal intervals on the outside of the connecting belt.

[0010] As a further solution of the present invention: a second partition and two groups of first partitions are fixedly connected to the supporting vertical plate, a first blade changing port is opened through the first partition, and the first blade sleeve matches the first blade changing port, and second blade changing ports are opened through both sides of the second partition, and the second blade sleeve matches the second blade changing port.

[0011] As a further solution of the present invention: the middle of the rotating trough body is fixedly connected to a rotating shaft, the lower side of the rotating trough body is fixedly connected to a movable ring plate, and the outer side of the supporting base is penetrated by a first fastening bolt;

[0012] A horizontal screw shaft is provided through the rotating trough body, a moving block is sleeved on the horizontal screw shaft, the upper side of the moving block is fixedly connected to the vertical trough body, and two groups of first connecting plates are fixedly connected to the bottom of the vertical trough body, and a second fastening bolt is provided through the first connecting plate;

[0013] A vertical screw shaft is provided through the vertical trough body, a lifting block is sleeved on the vertical screw shaft, two groups of second connecting plates are fixedly connected to the lifting block, and a third fastening bolt is provided through the second connecting plate.

[0014] As a further solution of the present invention: a rotating motor is fixedly installed in the middle of the lower side of the supporting base, and the rotating shaft is fixedly connected to the output end of the rotating motor. An annular groove is provided on the supporting base, and the movable ring plate is located on the inner side of the annular groove. The first fastening bolt is threadedly connected to the supporting base, and the end of the first fastening bolt is in contact with the movable ring plate.

[0015] As a further solution of the present invention: a translation motor is fixedly installed on the outer end of the rotating trough body, and the horizontal screw shaft is fixedly connected to the output end of the translation motor, the horizontal screw shaft is threadedly connected to the moving block, and the moving block is located inside the rotating trough body, the cross-sectional shape of the first connecting plate is L-shaped, and the second fastening bolt is threadedly connected to the first connecting plate, and the end of the second fastening bolt fits into the rotating trough body.

[0016] As a further solution of the present invention: a lifting motor is fixedly installed on the top of the vertical trough body, and the vertical screw shaft is fixedly connected to the output end of the lifting motor, the vertical screw shaft is threadedly connected to the lifting block, the lifting block is located on the inner side of the vertical trough body, and the lifting block is clamped with the supporting vertical plate, the cross-sectional shape of the second connecting plate is L-shaped, and the third fastening bolt is threadedly connected to the second connecting plate, and the end of the third fastening bolt fits in with the vertical trough body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. By starting the driving motor on the outside of the load-bearing vertical plate, the active shaft and the main sprocket are driven to rotate together, thereby driving the chain belt to transmit with the cooperation of the slave sprocket on the outside of the driven shaft, and then driving the connecting belt to transmit until the second tool holder is located at the second tool change port for tool changing operation. At the same time, the rotation of the main sprocket and the slave sprocket will drive several groups of first tool holders to rotate together until the first tool holder is located at the first tool change port for tool changing operation. This can maximize the space utilization rate to accommodate more tools for tool changing operations, and is more cost-effective for long-term use.

[0019] 2. By starting the rotating motor in the middle of the supporting base to drive the rotating shaft to rotate, the rotating trough body is driven to rotate under the cooperation of the movable ring plate and the annular groove, and then the supporting vertical plate is driven to rotate, and the position of the rotating trough body is fixed by the first fastening bolt, and then the translation motor at the outer end of the rotating trough body is started to drive the horizontal screw shaft to rotate, thereby driving the vertical trough body to move horizontally through the threaded connection between the horizontal screw shaft and the moving block, and then driving the supporting vertical plate to move horizontally, and fixing the position of the vertical trough body through the second fastening bolt on the first connecting plate, and then starting the lifting motor at the top of the vertical trough body to drive the vertical screw shaft to rotate, thereby driving the supporting vertical plate to rise and fall through the threaded connection between the vertical screw shaft and the lifting block, and fixing the position of the supporting vertical plate through the third fastening bolt on the second connecting plate, thereby realizing the position adjustment function of the tool magazine structure, so that it is suitable for tool changing operations of multi-channel CNC machine tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 Schematic diagram of the connection structure of the load-bearing vertical plate in the present invention;

[0023] Figure 3Schematic diagram of the connection structure of the first knife sheath in the present invention;

[0024] Figure 4 Schematic diagram of the distribution structure of the second tool holder in the present invention;

[0025] Figure 5 Schematic diagram of the connection structure between the supporting base and the supporting riser in the present invention;

[0026] Figure 6 It is a schematic cross-sectional structural diagram of the supporting base in the present invention;

[0027] Figure 7 It is a schematic diagram of the connection structure of the vertical trough body and the horizontal trough body in the present invention.

[0028] In the figure: 1. supporting base; 2. rotating trough body; 3. supporting vertical plate; 4. driving motor; 5. driving shaft; 6. main gear plate; 7. first plate body; 8. driven shaft; 9. slave gear plate; 10. second plate body; 11. first rotating block; 12. first knife sleeve; 13. chain belt; 14. connecting belt; 15. second rotating block; 16. second knife sleeve; 17. first partition; 18. first knife changing port; 19. second partition; 20. second knife changing port; 21. rotating motor; 22. rotating shaft; 23. movable ring plate; 24. first fastening bolt; 25. translation motor; 26. horizontal screw shaft; 27. moving block; 28. vertical trough body; 29. ​​first connecting plate; 30. second fastening bolt; 31. lifting motor; 32. vertical screw shaft; 33. lifting block; 34. second connecting plate; 35. third fastening bolt. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0031] Example 1:

[0032] Reference Figure 1-Figure 7The present invention provides a technical solution: a tool magazine structure for a multi-channel CNC machine tool, comprising a supporting base 1, and also comprising a rotating trough body 2 arranged on the upper side of the supporting base 1, a supporting vertical plate 3 is provided on the upper side of the rotating trough body 2, and an active shaft 5 and a driven shaft 8 are respectively penetrated on both sides of the supporting vertical plate 3, and the active shaft 5 and the driven shaft 8 are respectively clamped and sleeved with a main gear disc 6 and a slave gear disc 9, and the main gear disc 6 and the slave gear disc 9 are respectively fixedly connected to a first disc body 7 and a second disc body 10, and the edge positions of the main gear disc 6 and the slave gear disc 9 are rotatably connected to a plurality of groups of first rotating blocks 11, and the first rotating block 11 is clamped and connected to a first tool sleeve 12, a chain belt 13 is connected between the main gear disc 6 and the slave gear disc 9, and a connecting belt 14 is clamped and connected to the periphery of the chain belt 13, and a plurality of groups of second rotating blocks 15 are rotatably connected to the connecting belt 14, and a second tool sleeve 16 is clamped and connected to the second rotating block 15.

[0033] A driving motor 4 is fixedly mounted on the top of one side of the supporting vertical plate 3 , and a driving shaft 5 is fixedly connected to the output end of the driving motor 4 . Both the driving shaft 5 and the driven shaft 8 are movably connected to the supporting vertical plate 3 .

[0034] Several groups of first blade sleeves 12 are distributed at equal intervals on the peripheries of the first tray 7 and the second tray 10 , and several groups of second blade sleeves 16 are distributed at equal intervals on the outside of the connecting belt 14 .

[0035] A second partition 19 and two groups of first partitions 17 are fixedly connected to the supporting vertical plate 3. A first blade changing port 18 is opened through the first partition 17, and the first blade sleeve 12 matches the first blade changing port 18. Second blade changing ports 20 are opened through both sides of the second partition 19, and the second blade sleeve 16 matches the second blade changing port 20.

[0036] Specifically, by starting the driving motor 4 on the outside of the supporting vertical plate 3, the active shaft 5 and the main sprocket 6 are driven to rotate together, thereby driving the chain belt 13 to transmit with the cooperation of the slave sprocket 9 on the outside of the driven shaft 8, and then driving the connecting belt 14 to transmit, until the second tool sleeve 16 is located at the second tool change port 20 for tool changing operation. At the same time, the rotation of the main sprocket 6 and the slave sprocket 9 will drive several groups of first tool sleeves 12 to rotate together until the first tool sleeve 12 is located at the first tool change port 18 for tool changing operation, which can maximize the space utilization to accommodate more tools for tool changing operation, and is more cost-effective for long-term use.

[0037] Example 2:

[0038] Reference Figure 1-Figure 7The present invention provides a technical solution: a tool magazine structure applied to a multi-channel CNC machine tool, in which a rotating shaft 22 is fixedly connected to the middle of the rotating trough body 2, a movable ring plate 23 is fixedly connected to the lower side of the rotating trough body 2, a first fastening bolt 24 is penetrated by the outer side of the supporting base 1, a horizontal screw shaft 26 is penetrated by the rotating trough body 2, a moving block 27 is sleeved on the horizontal screw shaft 26, a vertical trough body 28 is fixedly connected to the upper side of the moving block 27, two groups of first connecting plates 29 are fixedly connected to the bottom of the vertical trough body 28, a second fastening bolt 30 is penetrated on the first connecting plate 29, a vertical screw shaft 32 is penetrated by the vertical trough body 28, a lifting block 33 is sleeved on the vertical screw shaft 32, two groups of second connecting plates 34 are fixedly connected to the lifting block 33, and a third fastening bolt 35 is penetrated on the second connecting plate 34.

[0039] A rotating motor 21 is fixedly installed in the middle of the lower side of the supporting base 1, and the rotating shaft 22 is fixedly connected to the output end of the rotating motor 21. An annular groove is provided on the supporting base 1, and the movable ring plate 23 is located on the inner side of the annular groove. The first fastening bolt 24 is threadedly connected to the supporting base 1, and the end of the first fastening bolt 24 is in contact with the movable ring plate 23.

[0040] The outer end of the rotating trough body 2 is fixedly installed with a translation motor 25, and the horizontal screw shaft 26 is fixedly connected to the output end of the translation motor 25. The horizontal screw shaft 26 is threadedly connected to the moving block 27, and the moving block 27 is located inside the rotating trough body 2. The cross-sectional shape of the first connecting plate 29 is L-shaped, and the second fastening bolt 30 is threadedly connected to the first connecting plate 29, and the end of the second fastening bolt 30 is in contact with the rotating trough body 2.

[0041] A lifting motor 31 is fixedly installed at the top of the vertical trough body 28, and the vertical screw shaft 32 is fixedly connected to the output end of the lifting motor 31. The vertical screw shaft 32 is threadedly connected to the lifting block 33. The lifting block 33 is located on the inner side of the vertical trough body 28, and the lifting block 33 is clamped with the supporting vertical plate 3. The cross-sectional shape of the second connecting plate 34 is L-shaped, and the third fastening bolt 35 is threadedly connected to the second connecting plate 34. The end of the third fastening bolt 35 fits with the vertical trough body 28.

[0042] Specifically, by starting the rotating motor 21 in the middle of the supporting base 1 to drive the rotating shaft 22 to rotate, thereby driving the rotating trough body 2 to rotate under the cooperation of the movable ring plate 23 and the annular groove, and then driving the supporting vertical plate 3 to rotate, and fixing the position of the rotating trough body 2 through the first fastening bolt 24, then starting the translation motor 25 at the outer end of the rotating trough body 2 to drive the horizontal screw shaft 26 to rotate, thereby driving the vertical trough body 28 to move horizontally through the threaded connection between the horizontal screw shaft 26 and the moving block 27, and then driving the supporting vertical plate 3 to move horizontally, and fixing the position of the vertical trough body 28 through the second fastening bolt 30 on the first connecting plate 29, immediately starting the lifting motor 31 at the top of the vertical trough body 28 to drive the vertical screw shaft 32 to rotate, thereby driving the supporting vertical plate 3 to rise and fall through the threaded connection between the vertical screw shaft 32 and the lifting block 33, and fixing the position of the supporting vertical plate 3 through the third fastening bolt 35 on the second connecting plate 34, thereby realizing the position adjustment function of the tool magazine structure, so that it is suitable for tool changing operations of multi-channel CNC machine tools.

[0043] The working principle and usage process of the present invention are as follows: first, the staff starts the rotating motor 21 in the middle of the supporting base 1 to drive the rotating shaft 22 to rotate, thereby driving the rotating trough body 2 to rotate under the cooperation of the movable ring plate 23 and the annular groove, and then driving the supporting vertical plate 3 to rotate, and fix the position of the rotating trough body 2 through the first fastening bolt 24, then starts the translation motor 25 at the outer end of the rotating trough body 2 to drive the horizontal screw shaft 26 to rotate, thereby driving the vertical trough body 28 to move horizontally through the threaded connection between the horizontal screw shaft 26 and the moving block 27, and then driving the supporting vertical plate 3 to move horizontally, and fix the position of the vertical trough body 28 through the second fastening bolt 30 on the first connecting plate 29, and then starts the lifting motor 31 at the top of the vertical trough body 28 to drive the vertical screw shaft 32 to rotate, thereby driving the supporting vertical plate 3 to rise and fall through the threaded connection between the vertical screw shaft 32 and the lifting block 33, and The position of the supporting vertical plate 3 is fixed by the third fastening bolt 35 on the second connecting plate 34, thereby realizing the position adjustment function of the tool magazine structure so that it is suitable for the tool changing operation of a multi-channel CNC machine tool. During the tool changing operation, the driving motor 4 on the outside of the supporting vertical plate 3 is started to drive the active shaft 5 and the main gear disc 6 to rotate together, thereby driving the chain belt 13 to transmit with the cooperation of the slave gear disc 9 on the outside of the driven shaft 8, and then driving the connecting belt 14 to transmit until the second tool sleeve 16 is located at the second tool changing port 20 of the second partition plate 19 for tool changing operation. At the same time, the rotation of the main gear disc 6 and the slave gear disc 9 will drive several groups of first tool sleeves 12 to rotate together until the first tool sleeve 12 is located at the first tool changing port 18 of the first partition plate 17 for tool changing operation. It can maximize the space utilization rate to accommodate more tools for tool changing operation, and is more cost-effective for long-term use to complete the operation.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A tool magazine structure for a multi-channel CNC machine tool, comprising a supporting base (1), characterized in that: It also includes a rotating trough body (2) arranged on the upper side of the bearing base (1), a bearing vertical plate (3) is arranged on the upper side of the rotating trough body (2), a driving shaft (5) and a driven shaft (8) are respectively penetrated on both sides of the bearing vertical plate (3), a main gear disc (6) and a slave gear disc (9) are respectively fixedly sleeved on the driving shaft (5) and the driven shaft (8), a first disc body (7) and a second disc body (10) are respectively fixedly connected to the main gear disc (6) and the slave gear disc (9), and the edge positions of the main gear disc (6) and the slave gear disc (9) are rotatably connected to a plurality of groups of first rotating blocks (11), and a first knife sleeve (12) is fixedly connected to the first rotating block (11); A chain belt (13) is connected between the main toothed disc (6) and the slave toothed disc (9); a connecting belt (14) is fixedly connected to the periphery of the chain belt (13); a plurality of groups of second rotating blocks (15) are rotatably connected to the connecting belt (14); and a second knife sleeve (16) is fixedly connected to the second rotating block (15).

2. The tool magazine structure for a multi-channel CNC machine tool according to claim 1, characterized in that: A driving motor (4) is fixedly mounted on the top of one side of the supporting vertical plate (3), and a driving shaft (5) is fixedly connected to the output end of the driving motor (4). Both the driving shaft (5) and the driven shaft (8) are movably connected to the supporting vertical plate (3).

3. The tool magazine structure for a multi-channel CNC machine tool according to claim 1, characterized in that: Several groups of the first knife sleeves (12) are distributed at equal intervals on the periphery of the first disc (7) and the second disc (10), and several groups of the second knife sleeves (16) are distributed at equal intervals on the outside of the connecting belt (14).

4. The tool magazine structure for a multi-channel CNC machine tool according to claim 3, characterized in that: The supporting vertical plate (3) is fixedly connected to a second partition plate (19) and two groups of first partition plates (17); a first blade changing port (18) is provided through the first partition plate (17), and the first blade sleeve (12) matches the first blade changing port (18); second blade changing ports (20) are provided through both sides of the second partition plate (19), and the second blade sleeve (16) matches the second blade changing port (20).

5. The tool magazine structure for a multi-channel CNC machine tool according to claim 1, characterized in that: The middle of the rotating trough body (2) is fixedly connected with a rotating shaft (22), the lower side of the rotating trough body (2) is fixedly connected with a movable ring plate (23), and the outer side of the supporting base (1) is penetrated by a first fastening bolt (24); A horizontal screw shaft (26) is provided through the rotating trough body (2), a moving block (27) is sleeved on the horizontal screw shaft (26), the upper side of the moving block (27) is fixedly connected with a vertical trough body (28), the bottom of the vertical trough body (28) is fixedly connected with two groups of first connecting plates (29), and a second fastening bolt (30) is provided through the first connecting plate (29); A vertical screw shaft (32) is provided through the vertical trough body (28), a lifting block (33) is sleeved on the vertical screw shaft (32), two sets of second connecting plates (34) are fixedly connected to the lifting block (33), and a third fastening bolt (35) is provided through the second connecting plate (34).

6. The tool magazine structure for a multi-channel CNC machine tool according to claim 5, characterized in that: A rotating motor (21) is fixedly mounted in the middle of the lower side of the bearing base (1), and the rotating shaft (22) is fixedly connected to the output end of the rotating motor (21). An annular groove is provided on the bearing base (1), and a movable ring plate (23) is located inside the annular groove. The first fastening bolt (24) is threadedly connected to the bearing base (1), and the end of the first fastening bolt (24) is in contact with the movable ring plate (23).

7. The tool magazine structure for a multi-channel CNC machine tool according to claim 5, characterized in that: The outer end of the rotating trough body (2) is fixedly mounted with a translation motor (25), and the horizontal screw shaft (26) is fixedly connected to the output end of the translation motor (25), the horizontal screw shaft (26) is threadedly connected to the moving block (27), and the moving block (27) is located inside the rotating trough body (2), the cross-section of the first connecting plate (29) is L-shaped, and the second fastening bolt (30) is threadedly connected to the first connecting plate (29), and the end of the second fastening bolt (30) is in contact with the rotating trough body (2).

8. The tool magazine structure for a multi-channel CNC machine tool according to claim 5, characterized in that: The top end of the vertical trough body (28) is fixedly mounted with a lifting motor (31), and the vertical screw shaft (32) is fixedly connected to the output end of the lifting motor (31), the vertical screw shaft (32) is threadedly connected to the lifting block (33), the lifting block (33) is located on the inner side of the vertical trough body (28), and the lifting block (33) is snap-connected with the supporting vertical plate (3), the cross-section of the second connecting plate (34) is L-shaped, and the third fastening bolt (35) is threadedly connected to the second connecting plate (34), and the end of the third fastening bolt (35) is in contact with the vertical trough body (28).

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