A tensioning device for slag scooping machine

Abstract

The utility model relates to the technical field of slag scooping equipment, and discloses a slag scooping machine tensioning device, comprising a bottom pipe, the top of the bottom pipe is fixedly connected with an upper pipe, the bottom pipe and the upper pipe are both hollow circular pipes, the bottom pipe and the upper pipe are communicated, a hydraulic rod is fixedly connected in the cavity of the bottom pipe, a circular ring-shaped base plate is fixedly connected at the connection between the upper pipe and the bottom pipe cavity, a base is fixedly connected to the bottom of the bottom pipe, a tensioning structure is arranged in the cavity of the upper pipe, the tensioning structure comprises a lifting column and a movable rod, the lifting column is slidably connected in the cavity of the upper pipe, the bottom of the lifting column is also fixedly connected to the hydraulic rod, the movable rod is movably connected in the cavity of the upper pipe, and the tensioning structure can increase the tensioning time of the device.

Description

Technical Field

[0001] The utility model belongs to the technical field of slag scooping equipment, and in particular relates to a slag scooping machine tensioning device. Background Art

[0002] The prior art (application number: CN202111305950.1) discloses a tensioning device suitable for a slag scooping machine, which relates to the technical field of slag scooping equipment. It comprises: a tensioning frame, a through hole is provided on the top of the tensioning frame; a screw rod that movably passes through the through hole; and a hydraulic cylinder installed in the tensioning frame.

[0003] The prior art pushes the structure in the hydraulic rod device and extends the device, and then fixes the originally extended position through bolts and springs to prevent the hydraulic rod from rebounding due to long-term operation. Although the prior art can fix the extended height, the prior art uses the force applied by the spring and the bolt, which will cause the bolt to loosen when the fixing time is long, and the spring will reduce the elastic force, thereby causing the locking position to loosen. Therefore, the prior art will still loosen at the extended position when used for a long time.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] A slag scoop tensioning device comprises a bottom pipe, the top of the bottom pipe is fixedly connected to an upper pipe, the bottom pipe and the upper pipe are both hollow circular pipes, the bottom pipe and the upper pipe are communicated, a hydraulic rod is fixedly connected to the cavity of the bottom pipe, a circular ring-shaped base plate is fixedly connected to the connection between the upper pipe and the bottom pipe cavity, a base is fixedly connected to the bottom of the bottom pipe, a tensioning structure is arranged in the cavity of the upper pipe, the tensioning structure comprises a lifting column and a movable rod, the lifting column is slidably connected to the cavity of the upper pipe, the bottom of the lifting column is also fixedly connected to the hydraulic rod, the movable rod is movably connected to the cavity of the upper pipe, and the tensioning structure can increase the tensioning time of the device.

[0007] As a preferred embodiment of the utility model, the lifting column is also cylindrical, and the diameter of the lifting column is consistent with the inner cavity of the upper tube. An operating groove is provided on the front wall of the upper tube, and the operating groove is a rectangular groove. The top of the active rod is U-shaped, and the rear wall of the active rod can pass through the operating groove into the upper tube and contact the front wall of the lifting column. The opening of the rear wall of the active rod is adapted to the curved surface of the front wall of the lifting column.

[0008] As a preferred embodiment of the utility model, the tensioning structure also includes a giveway groove, an anti-slip groove, a first positioning groove and a second positioning groove. The giveway grooves are symmetrically arranged on both sides of the front wall surface of the lifting column, the anti-slip grooves are also symmetrically arranged on both sides of the front wall surface of the lifting column in the giveway groove, the first positioning groove is arranged on the wall surface of the lifting column in the giveway groove, and the second positioning groove is also arranged on the wall surface of the lifting column in the giveway groove. Both the first positioning groove and the second positioning groove are rectangular grooves. Multiple second positioning grooves and the first positioning grooves are arranged in the giveway groove and are distributed in a linear array. The first positioning groove and the second positioning groove are also symmetrically arranged on both sides of the front wall surface of the lifting column.

[0009] As a preferred embodiment of the utility model, the tensioning structure also includes an anti-slip block, a first positioning block, a second positioning block, a spring block and an spring base block. The anti-slip block is symmetrically fixedly connected in the opening of the rear wall of the movable rod, the first positioning block is fixedly connected to the rear wall of the anti-slip block, the number of the first positioning blocks and the anti-slip blocks is the same, the second positioning block is fixedly connected to the rear wall of the movable rod, the spring block is symmetrically fixedly connected to the two side walls of the movable rod, the spring base block is symmetrically fixedly connected to the top of the base plate, the front wall of the spring block can be elastically connected to the rear wall of the spring base block, and the positions of the spring block and the spring base block are aligned.

[0010] As a preferred embodiment of the utility model, the rear wall surface of the movable rod can slide in the symmetrical give-way groove, the second positioning groove can adapt to the second positioning block, the first positioning groove can adapt to the first positioning block, the anti-slip block can slide in the anti-slip groove, the second positioning block can enter the second positioning groove, the first positioning block can enter the first positioning groove, and the anti-slip groove can adapt to the length of the anti-slip block and the first positioning block.

[0011] As a preferred embodiment of the utility model, a damage reduction structure is provided on the top of the lifting column, and the damage reduction structure includes a top base column, a rotating column and a spring groove. The top base column is symmetrically fixedly connected to the top of the lifting column, the rotating column is rotatably connected between the symmetrical top base columns, and the spring groove is symmetrically opened on the outer wall surface of the rotating column.

[0012] As a preferred embodiment of the present utility model, the damage reduction structure further includes a spring plate and a limiting ring, the spring plate is elastically connected in the spring groove through a spring, and the limiting ring is fixedly connected to the wall surface of the spring plate.

[0013] As a preferred embodiment of the utility model, the rotating column is cylindrical, the two planes of the rotating column rotate between the symmetrical top base columns, the spring groove is an inverted T-shaped groove, the spring plate is elastically connected in the spring groove by a spring, the limiting ring is an annular ring, the spring plate is fixedly connected to the inner arc wall of the limiting ring, and the limiting ring and the spring plate are symmetrically arranged in the spring groove.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. By setting up a tensioning structure, the slag machine chain can be lifted up and tensioned when the hydraulic rod shrinks due to long-term work, because the tensioning structure locks the position of the lifting column by setting multiple clamping methods, and the position of the lifting column will still be fixed by the second positioning block and the first positioning block when the hydraulic rod rebounds. Even if the spring between the spring block and the spring base block loses its elasticity due to long-term use, it will not affect the second positioning block and the first positioning block from clamping the position of the lifting column, thereby achieving longer tensioning. Therefore, compared with the prior art, the tensioning time of this solution is longer.

[0016] 2. By setting up a wear reduction structure, the wear of the chain and the device during operation can be reduced. This is because the rotating column can drive the limit ring to rotate relative to the chain when the chain is operating. Compared with directly clamping and limiting it to prevent the chain from derailing, the rotating column and the limit ring can prevent the chain from derailing while reducing the wear of the chain, the limit ring and the rotating column wall, thereby increasing the service life of the device.

[0017] 3. By setting up the loss reduction structure, it is possible to adapt to chain derailment of different widths, because the loss reduction structure automatically adapts to the chain size between the symmetrical limit rings by pushing the spring plate through the spring, thereby increasing the application range of the device.

[0018] 4. The screw holes at the bottom of the base can make it easier to install the device without welding the device and the slag remover, and it is also easier to remove the device from the slag remover.

[0019] The specific implementation modes of the present utility model are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the attached picture:

[0021] Figure 1 It is a three-dimensional diagram of the utility model;

[0022] Figure 2 It is a perspective stereogram of the bottom tube and the upper tube of the utility model;

[0023] Figure 3 It is a front perspective view of the bottom tube and the upper tube of the utility model;

[0024] Figure 4 This is an exploded view of the lifting column and upper tube of the utility model;

[0025] Figure 5 This is a disassembled diagram of the movable rod and the upper tube of the utility model;

[0026] Figure 6 It is a three-dimensional diagram of the loss reduction structure of the utility model;

[0027] Figure 7 This is an exploded view of the limit ring and the rotating column of the utility model.

[0028] In the figure: 20, bottom tube; 21, base; 22, hydraulic rod; 23, upper tube; 24, base plate; 30, lifting column; 31, give way groove; 32, anti-slip groove; 33, first positioning groove; 34, second positioning groove; 35, movable rod; 36, anti-slip block; 37, first positioning block; 38, second positioning block; 39, spring block; 40, operating groove; 41, spring base block; 42, top base column; 43, rotating column; 44, spring groove; 45, spring plate; 46, limiting ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, a slag scoop tensioning device includes a bottom pipe 20, the top of the bottom pipe 20 is fixedly connected to an upper pipe 23, the bottom pipe 20 and the upper pipe 23 are both hollow circular tubes, the bottom pipe 20 and the upper pipe 23 are connected, a hydraulic rod 22 is fixedly connected to the cavity of the bottom pipe 20, a base plate 24 is fixedly connected to the connection between the upper pipe 23 and the cavity of the bottom pipe 20, a base 21 is fixedly connected to the bottom of the bottom pipe 20, the hydraulic rod 22 is electrically connected to a power source, and the power source can control the lifting and lowering of the hydraulic rod 22. This is an existing technology, so it will not be described here.

[0031] like Figure 2 , Figure 3 and Figure 4 As shown, a tensioning structure is provided in the cavity of the upper tube 23, and the tensioning structure includes a lifting column 30 and a movable rod 35. The lifting column 30 is slidably connected in the cavity of the upper tube 23, and the bottom of the lifting column 30 is also fixedly connected to the hydraulic rod 22. The movable rod 35 is movably connected in the cavity of the upper tube 23. The tensioning structure can increase the tensioning time of the device. A plurality of screw holes are opened through the wall surface of the base 21, and the base 21 can be installed in the slag scooping machine through the screw holes.

[0032] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the lifting column 30 is also cylindrical, and the diameter of the lifting column 30 is consistent with the inner cavity of the upper tube 23. The front wall of the upper tube 23 is provided with an operating groove 40, and the operating groove 40 is a rectangular groove. The top of the active rod 35 is U-shaped, and the rear wall of the active rod 35 can pass through the operating groove 40 into the upper tube 23 and contact the front wall of the lifting column 30. The opening of the rear wall of the active rod 35 is adapted to the curved surface of the front wall of the lifting column 30. The tensioning structure also includes a clearance groove 31, an anti-slip groove 32, a first positioning groove 33 and a second positioning groove 34. The clearance groove 31 is symmetrically opened. The anti-slip grooves 32 are also symmetrically arranged on both sides of the front wall of the lifting column 30 in the clearance groove 31. The first positioning groove 33 is arranged on the wall of the lifting column 30 in the clearance groove 31, and the second positioning groove 34 is also arranged on the wall of the lifting column 30 in the clearance groove 31. The first positioning groove 33 and the second positioning groove 34 are both rectangular grooves. The second positioning groove 34 and the first positioning groove 33 are arranged in the clearance groove 31 in a plurality and are distributed in a linear array. The first positioning groove 33 and the second positioning groove 34 are also symmetrically arranged on the lifting column 30. On both sides of the front wall, the tensioning structure also includes an anti-slip block 36, a first positioning block 37, a second positioning block 38, an elastic block 39 and an elastic base block 41. The anti-slip block 36 is symmetrically fixedly connected to the opening of the rear wall of the active rod 35, the first positioning block 37 is fixedly connected to the rear wall of the anti-slip block 36, the number of the first positioning block 37 and the anti-slip block 36 is the same, the second positioning block 38 is fixedly connected to the rear wall of the active rod 35, the elastic block 39 is symmetrically fixedly connected to the two side walls of the active rod 35, the elastic base block 41 is symmetrically fixedly connected to the top of the base plate 24, and the front of the elastic block 39 The wall surface can be elastically connected to the rear wall surface of the elastic base block 41, the positions of the elastic block 39 and the elastic base block 41 are aligned, the rear wall surface of the active rod 35 can slide in the symmetrical give-way groove 31, the second positioning groove 34 can be adapted to the second positioning block 38, the first positioning groove 33 can be adapted to the first positioning block 37, the anti-slip block 36 can slide in the anti-slip groove 32, the second positioning block 38 can enter the second positioning groove 34, the first positioning block 37 can enter the first positioning groove 33, and the anti-slip groove 32 can adapt to the lengths of the anti-slip block 36 and the first positioning block 37;

[0033] When in use, the device is fixedly installed in the slag scoop machine through the base 21, the chain of the slag scoop machine is aligned with the top of the upper tube 23 and the active rod 35 is pulled toward the outer wall of the upper tube 23. At this time, the active rod 35 can drive the first positioning block 37 to disengage from the first positioning groove 33, and the active rod 35 can also drive the second positioning block 38 to disengage from the second positioning groove 34. Then the power of the hydraulic rod 22 is turned on. At this time, the hydraulic rod 22 can extend and push the lifting column 30 upward in the upper tube 23. When the lifting column 30 is pushed up, the lifting column 30 can move vertically upward in the cavity of the upper tube 23. When the lifting column 30 is moved, the anti-dropping block 36 and the first positioning block 37 can move relatively in the anti-dropping groove 32, and the base plate 24 can move in the giving way groove 31. After the height of the lifting column 30 is adjusted to the required height, the active rod 35 can be loosened to fix the position of the lifting column 30, because when the active rod 35 is loosened, the spring on the wall of the elastic base block 41 can push the elastic block 39 toward the rear of the upper tube 23, and when the elastic block 39 is pushed, it can drive the active rod 35 to move at the same time, and the active rod 35 can drive the first positioning block 37 and the second positioning block 38 to re-enter the second positioning groove 34 and the first positioning groove 33, thereby locking the position of the lifting column 30;

[0034] To sum up, by setting up a tensioning structure, the slag machine chain can be lifted up and tensioned when the hydraulic rod 22 shrinks due to long-term work, because the tensioning structure locks the position of the lifting column 30 by setting multiple clamping methods, and when the hydraulic rod 22 rebounds, the position of the lifting column 30 will still be fixed by the second positioning block 38 and the first positioning block 37. Even if the spring between the spring block 39 and the spring base block 41 loses its elasticity due to long-term use, it will not affect the second positioning block 38 and the first positioning block 37 from clamping the position of the lifting column 30, thereby achieving longer tensioning. Therefore, compared with the prior art, the tensioning time of this solution is longer.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, a loss reduction structure is provided at the top of the lifting column 30, and the loss reduction structure includes a top base column 42, a rotating column 43 and an elastic groove 44. The top base column 42 is symmetrically fixedly connected to the top of the lifting column 30, and the rotating column 43 is rotatably connected between the symmetrical top base columns 42. The elastic groove 44 is symmetrically opened on the outer wall surface of the rotating column 43. The loss reduction structure also includes a spring plate 45 and a limiting ring 46. The spring plate 45 is elastically connected in the elastic groove 44 through a spring, and the limiting ring 46 is fixedly connected to the wall surface of the spring plate 45.

[0036] In specific use, when the top of the upper tube 23 and the chain to be tensioned are symmetrically positioned, the chain needs to be placed between symmetrical limiting rings 46. When the lifting column 30 is lifted by the hydraulic rod 22, the lifting column 30 can drive the top base column 42 to rise at the same time, the top base column 42 can drive the rotating column 43 to rise, and the rotating column 43 can drive the spring plate 45 and the limiting ring 46 to rise at the same time. When the chain between the symmetrical limiting rings 46 is in operation, the rotating column 43 can rotate with the transmission of the chain;

[0037] In summary, by setting up a wear reduction structure, the wear of the chain and the device during operation can be reduced. This is because the rotating column 43 can drive the limiting ring 46 to rotate relative to the chain when the chain is operating. Compared with directly clamping and limiting the chain to prevent the chain from derailing, the rotating column 43 and the limiting ring 46 can prevent the chain from derailing while reducing the wear of the chain, the limiting ring 46 and the wall of the rotating column 43, thereby increasing the service life of the device.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the rotating column 43 is cylindrical, and the two planes of the rotating column 43 rotate between the symmetrical top base columns 42. The spring groove 44 is an inverted T-shaped groove, and the spring plate 45 is elastically connected in the spring groove 44 through a spring. The limiting ring 46 is annular, and the spring plate 45 is fixedly connected to the inner arc wall surface of the limiting ring 46. The limiting ring 46 and the spring plate 45 are symmetrically arranged in the spring groove 44.

[0039] In specific use, the spring of the spring plate 45 in the spring groove 44 can push the symmetrical spring plate 45 to move toward the opposite spring plate 45, and the spring plate 45 can drive the limit ring 46 to move at the same time;

[0040] In summary, by providing a loss reduction structure, chain derailment of different widths can be adapted, because the loss reduction structure automatically adapts to the chain size between the symmetrical limit rings 46 by pushing the spring plate 45 through the spring, thereby increasing the application range of the device.

[0041] Working principle: align the chain of the slag scoop machine with the top of the upper tube 23 and pull the active rod 35 toward the outer wall of the upper tube 23, at this time the active rod 35 can drive the first positioning block 37 to disengage from the first positioning groove 33, the active rod 35 can also drive the second positioning block 38 to disengage from the second positioning groove 34, and then turn on the power of the hydraulic rod 22, at this time the hydraulic rod 22 can extend and push the lifting column 30 upward in the upper tube 23, when the lifting column 30 is pushed up, the lifting column 30 can move vertically upward in the cavity of the upper tube 23, when the lifting column 30 moves, the anti-slip block 36 and the first positioning block 37 can move relatively in the anti-slip groove 32, the base plate 24 can move in the make way groove 31, after the height of the lifting column 30 is adjusted to the required height, release the active rod 35 to fix the position of the lifting column 30, because When the active rod 35 is loosened, the spring on the wall of the elastic base block 41 can push the elastic block 39 toward the rear of the upper tube 23. When the elastic block 39 is pushed, the active rod 35 can be driven to move at the same time. The active rod 35 can drive the first positioning block 37 and the second positioning block 38 to re-enter the second positioning groove 34 and the first positioning groove 33 to lock the position of the lifting column 30. When the top of the upper tube 23 and the chain position to be tensioned are symmetrical, the chain needs to be placed between the symmetrical limiting rings 46. When the lifting column 30 is lifted by the hydraulic rod 22, the lifting column 30 can drive the top base column 42 to rise at the same time, the top base column 42 can drive the rotating column 43 to rise, and the rotating column 43 can drive the spring plate 45 and the limiting ring 46 to rise at the same time. When the chain between the symmetrical limiting rings 46 is operating, the rotating column 43 can rotate with the transmission of the chain.

[0042] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A slag scoop tensioning device, comprising a bottom pipe (20), the top of the bottom pipe (20) is fixedly connected to an upper pipe (23), the bottom pipe (20) and the upper pipe (23) are both hollow circular tubes, the bottom pipe (20) and the upper pipe (23) are connected, a hydraulic rod (22) is fixedly connected to the cavity of the bottom pipe (20), a base plate (24) is fixedly connected to the connection between the upper pipe (23) and the bottom pipe (20), and a base (21) is fixedly connected to the bottom of the bottom pipe (20), characterized in that: A tensioning structure is arranged in the cavity of the upper tube (23), and the tensioning structure comprises a lifting column (30) and a movable rod (35). The lifting column (30) is slidably connected in the cavity of the upper tube (23), and the bottom of the lifting column (30) is also fixedly connected to the hydraulic rod (22). The movable rod (35) is movably connected in the cavity of the upper tube (23). The tensioning structure can increase the tensioning time of the device.

2. The slag scoop tensioning device according to claim 1, characterized in that: The lifting column (30) is also cylindrical, and the diameter of the lifting column (30) is consistent with the inner cavity of the upper tube (23). The front wall of the upper tube (23) is provided with an operating groove (40), and the operating groove (40) is a rectangular groove. The top of the movable rod (35) is U-shaped, and the rear wall of the movable rod (35) can pass through the operating groove (40) into the upper tube (23) and contact the front wall of the lifting column (30). The opening of the rear wall of the movable rod (35) is adapted to the curved surface of the front wall of the lifting column (30).

3. The slag scoop tensioning device according to claim 1, characterized in that: The tensioning structure further comprises a clearance groove (31), an anti-slip groove (32), a first positioning groove (33) and a second positioning groove (34); the clearance groove (31) is symmetrically arranged on both sides of the front wall surface of the lifting column (30); the anti-slip groove (32) is also symmetrically arranged on both sides of the front wall surface of the lifting column (30) in the clearance groove (31); the first positioning groove (33) is arranged on the wall surface of the lifting column (30) in the clearance groove (31); the second positioning groove (34) is also arranged on the wall surface of the lifting column (30) in the clearance groove (31); the first positioning groove (33) and the second positioning groove (34) are both rectangular grooves; a plurality of the second positioning grooves (34) and the first positioning groove (33) are arranged in the clearance groove (31) and are distributed in a linear array; the first positioning groove (33) and the second positioning groove (34) are also symmetrically arranged on both sides of the front wall surface of the lifting column (30).

4. The slag scoop tensioning device according to claim 3, characterized in that: The tensioning structure also includes an anti-slip block (36), a first positioning block (37), a second positioning block (38), an elastic block (39) and an elastic base block (41); the anti-slip block (36) is symmetrically fixedly connected to the opening of the rear wall of the movable rod (35); the first positioning block (37) is fixedly connected to the rear wall of the anti-slip block (36); the number of the first positioning block (37) and the anti-slip block (36) is the same; the second positioning block (38) is fixedly connected to the rear wall of the movable rod (35); the elastic block (39) is symmetrically fixedly connected to the two side walls of the movable rod (35); the elastic base block (41) is symmetrically fixedly connected to the top of the base plate (24); the front wall of the elastic block (39) can be elastically connected to the rear wall of the elastic base block (41); and the positions of the elastic block (39) and the elastic base block (41) are aligned.

5. The slag scoop tensioning device according to claim 4, characterized in that: The rear wall surface of the movable rod (35) can slide in the symmetrical giving way groove (31), the second positioning groove (34) can be adapted to the second positioning block (38), the first positioning groove (33) can be adapted to the first positioning block (37), the anti-slip block (36) can slide in the anti-slip groove (32), the second positioning block (38) can enter the second positioning groove (34), the first positioning block (37) can enter the first positioning groove (33), and the anti-slip groove (32) can adapt to the lengths of the anti-slip block (36) and the first positioning block (37).

6. The slag scoop tensioning device according to claim 2, characterized in that: The top of the lifting column (30) is provided with a damage reduction structure, which includes a top base column (42), a rotating column (43) and an elastic groove (44). The top base column (42) is symmetrically fixedly connected to the top of the lifting column (30), the rotating column (43) is rotatably connected between the symmetrical top base columns (42), and the elastic groove (44) is symmetrically opened on the outer wall surface of the rotating column (43).

7. The slag scoop tensioning device according to claim 6, characterized in that: The damage reduction structure further comprises a spring plate (45) and a limiting ring (46); the spring plate (45) is elastically connected in the spring groove (44) via a spring, and the limiting ring (46) is fixedly connected to the wall surface of the spring plate (45).

8. The slag scoop tensioning device according to claim 7, characterized in that: The rotating column (43) is cylindrical, and two planes of the rotating column (43) rotate between the symmetrical top base columns (42). The spring groove (44) is an inverted T-shaped groove. The spring plate (45) is elastically connected in the spring groove (44) through a spring. The limiting ring (46) is annular, and the spring plate (45) is fixedly connected to the inner arc wall surface of the limiting ring (46). The limiting ring (46) and the spring plate (45) are symmetrically arranged in the spring groove (44).

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