CN213671240U

CN213671240U - High-precision steel plate edge rolling equipment

Info

Publication number: CN213671240U
Application number: CN202022148193.9U
Authority: CN
Inventors: 谢拥军; 王正军; 薛磊
Original assignee: Henan Tianyi Packaging Container Co ltd
Current assignee: Henan Tianyi Packaging Container Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-07-13
Anticipated expiration: 2030-09-24

Abstract

The application relates to the technical field of steel plate processing equipment, in particular to high-precision steel plate rounding equipment which comprises a rack, a pressing roller, a first rounding roller and a second rounding roller, wherein the pressing roller, the first rounding roller and the second rounding roller are arranged on the rack in a flush manner along the width direction of the rack at equal height, the pressing roller is arranged between the first rounding roller and the second rounding roller, and the first edge rolling roller and the second edge rolling roller are symmetrically arranged with the central axis of the compression roller, a rotating device is arranged on the rack, the rotating device comprises a rotating disc used for pushing the first edge rolling roller and the second edge rolling roller to be close to or far away from each other, a linkage assembly used for driving the rotating disc to rotate and a driving assembly used for driving the linkage assembly to rotate, the driving assembly is arranged on the rack, the linkage assembly is arranged on the driving assembly, the rotating disc is arranged on the linkage assembly, and a lifting device used for driving the compression roller to lift is arranged on the rack. The plate edge rolling machine has the advantages that the plates with different sizes can be rolled, and the application range is wide.

Description

High-precision steel plate edge rolling equipment

Technical Field

The application relates to the technical field of steel plate processing equipment, in particular to high-precision steel plate edge rolling equipment.

Background

The present rolling machine is divided into mechanical type and hydraulic type, the mechanical type rolling machine is a high-quality and high-benefit rolling device for rolling carbon steel, stainless steel and non-ferrous metal section bars into circular rings, and the mechanical type rolling machine has the advantages of unique structure, small volume, low energy consumption, high efficiency, no noise, convenient installation and use, simple operation, strong bearing energy, long service life, high rolling speed, reliable product quality and the like.

The prior Chinese patent with publication number CN208195290U discloses an iron sheet rolling machine for improving feeding precision, which comprises an iron sheet rolling machine shell, wherein a first driving shaft and a second driving shaft are arranged at the bottom end inside the iron sheet rolling machine shell, transmission gears are arranged at two ends of the first driving shaft and the second driving shaft, and the position of one end on the first driving shaft, which is close to the transmission gear, is provided with a rocker, when the rolling machine works, the rolling machine for the iron sheet is moved to a proper position, the iron sheet is placed between the driven shaft and the first driving shaft from one side far away from the cover for the iron sheet rolling machine, the rocker is held by a hand to start rotating, the rocker drives the first driving shaft to rotate so that the iron sheet enters the machine, the moving of the iron sheet drives the driven shaft to rotate, the iron sheet is bent into a radian after passing through a gap between the driven shaft and the first driving shaft as well as the second driving shaft, and the iron sheet after rolling falls into the cover for the.

The above prior art solutions have the following drawbacks: this improve iron sheet edge rolling machine that feeds precision can carry out the edge rolling operation to the iron sheet, but at edge rolling operation in-process, first driving shaft and second driving shaft can not adjust at iron sheet edge rolling machine shell, can only carry out the edge rolling to the panel of specific dimensions, can't carry out the edge rolling to the panel of different dimensions, lead to this edge rolling machine's application range less, consequently, need improve it.

SUMMERY OF THE UTILITY MODEL

The application aims at providing high-precision steel plate rolling equipment which has the effect that plates with different sizes and specifications can be rolled, so that the rolling equipment is wide in application range.

The above object of the present invention is achieved by the following technical solutions:

a high-precision steel plate rounding device comprises a frame, a pressing roller arranged on the frame, a first rounding roller and a second rounding roller, the first edge rolling roller and the second edge rolling roller are arranged on the rack in a flush manner along the width direction of the rack, the pressing roller is arranged between the first edge rolling roller and the second edge rolling roller, the first edge rolling roller and the second edge rolling roller are symmetrically arranged by the central axis of the pressing roller, a rotating device is arranged on the machine frame, the rotating device comprises a rotating disc for pushing the first rolling roller and the second rolling roller to approach or separate from each other, a linkage component for driving the rotating disc to rotate and a driving component for driving the linkage component to rotate, the driving assembly is arranged on the rack, the linkage assembly is arranged on the driving assembly, the rotating disc is arranged on the linkage assembly, and a lifting device for driving the compression roller to lift is arranged on the rack.

Through adopting above-mentioned technical scheme, be provided with rotating device in the frame, rotating device can drive edge rolling roller one and edge rolling roller two and do the motion of keeping away from each other or being close to each other, adjusts, carries out the butt to the outer wall of the panel of different dimensions to drive the pinch roller butt through elevating gear and process on the inner wall of panel, the application range of this edge rolling equipment is wider.

The application is further configured to: the drive assembly comprises a driving piece and a worm, the driving piece is arranged on the rack, the worm is coaxially fixed on the driving piece, the rack supports the worm in a rotating mode, and the linkage assembly is arranged on the worm.

Through adopting above-mentioned technical scheme, the driving piece sets up in the frame, starts the driving piece, drives the worm and rotates, can realize the motion of linkage subassembly, the simple operation.

The application is further configured to: the linkage subassembly includes worm wheel and dwang, the worm wheel butt is on the worm, and worm wheel and worm mesh mutually, the dwang is fixed to be worn to locate in the worm wheel, the rolling disc is fixed to be set up on the dwang, the central axis of rolling disc is parallel and not the collineation with the central axis of dwang, the spout has been seted up in the frame, roll up two equal sliding fit of roller one and roll up the roller in the spout, and roll up roller one and roll up two butts of roller on the rolling disc.

Through adopting above-mentioned technical scheme, the worm rotates and can drives the worm wheel and rotate, drives the dwang and rotates, drives the rolling disc and rotates, because the central axis of rolling disc is parallel with the central axis of dwang and not collinear, when the rolling disc rotates, can drive the edge rolling roller one and edge rolling roller two slides in the spout simultaneously to can realize the regulation to the distance between edge rolling roller one and the edge rolling roller two, simple structure, convenient operation can process the steel sheet into the drum of different diameters size simultaneously.

The application is further configured to: the lifting device comprises a sliding seat used for driving the pressing roller to lift and a lifting assembly used for driving the sliding seat to lift, the lifting assembly is arranged on the rack, and the sliding seat is arranged on the lifting assembly.

Through adopting above-mentioned technical scheme, lifting unit sets up in the frame, starts lifting unit, can drive the pinch roller and go up and down to make the pinch roller compress tightly on the steel sheet, carry out the edge rolling processing to the steel sheet.

The application is further configured to: the lifting assembly comprises a lifting motor and a rotating screw rod, the lifting motor is fixedly arranged on the rack, the rotating screw rod is coaxially fixed on an output shaft of the lifting motor, the rotating screw rod is sleeved with a sliding seat, the sliding seat is in threaded fit with the rotating screw rod, and the sliding seat is in sliding fit with the rack.

Through adopting above-mentioned technical scheme, elevator motor is fixed to be set up in the frame, starts elevator motor, can drive and rotate the screw rod and rotate to make the sliding seat drive the compressing roller and go up and down, the structure is comparatively simple, and the slip of sliding seat is comparatively stable simultaneously.

The application is further configured to: the pressing roller is provided with a driving device for driving the pressing roller to rotate, the driving device comprises a driving motor and a fixing sleeve, the driving motor is fixedly arranged on the sliding seat, the fixing sleeve is fixedly arranged on an output shaft of the driving motor, and the fixing sleeve is sleeved on the pressing roller.

Through adopting above-mentioned technical scheme, be provided with drive arrangement on the compression roller, driving motor during operation can drive the fixed sleeve and rotate, can drive the compression roller and rotate, carries out the edge rolling processing to the steel sheet, and through the setting of fixed sleeve, can make things convenient for the compression roller to take out from fixed sleeve simultaneously, it is more convenient when taking out the machined part that will process.

The application is further configured to: and a clamping device for clamping the compression roller is arranged at one end of the compression roller, which is far away from the driving motor, and the clamping device is arranged on the sliding seat.

Through adopting above-mentioned technical scheme, be provided with clamping device on the compressing roller, can carry out the centre gripping to the compressing roller through clamping device, to the steel sheet course of working, can make the compressing roller rotate, realize the edge rolling processing to the steel sheet, after the steel sheet processing was accomplished, clamping device no longer carries out the centre gripping to the compressing roller, takes out the machined part from the compressing roller, and it is more convenient when making the machined part take out.

The application is further configured to: the clamping device comprises a mounting frame, a clamping sleeve and a rotary screw, the mounting frame is in sliding fit with the sliding seat, the clamping sleeve is rotatably connected onto the mounting frame, the clamping sleeve is sleeved on the compression roller, the rotary screw is arranged in the mounting frame in a penetrating mode, and the rotary screw is in threaded fit with the mounting frame.

Through adopting above-mentioned technical scheme, will rotate the screw rod, can drive the mount and slide on the sliding seat to drive the centre gripping sleeve and keep away from the pinch roller or be close to the slip of pinch roller, when the centre gripping sleeve extrudees the pinch roller, can lock the pinch roller, when the pinch roller was kept away from to the centre gripping sleeve, can dismantle the pinch roller, make things convenient for taking out of machined part.

To sum up, the beneficial technical effect of this application does:

1. the rolling device is arranged on the rack, the rolling roller I and the rolling roller II can be driven by the rotating device to move away from or close to each other to be adjusted, the outer walls of the plates with different sizes and specifications are abutted, the pressing roller is driven by the lifting device to abut against the inner wall of the plate to be processed, and the rolling equipment is wide in application range;

2. the driving device is arranged on the pressing roller, so that when the driving motor works, the fixing sleeve can be driven to rotate, the pressing roller can be driven to rotate, the steel plate is subjected to edge rolling processing, meanwhile, the pressing roller can be conveniently taken out of the fixing sleeve through the arrangement of the fixing sleeve, and the processed workpiece is more convenient to take out;

3. through being provided with clamping device on the pinch roller, can carry out the centre gripping to the pinch roller through clamping device, to the steel sheet course of working, can make the pinch roller rotate, realize the edge rolling processing to the steel sheet, after the steel sheet processing was accomplished, clamping device no longer carries out the centre gripping to the pinch roller, takes out the machined part from the pinch roller, and it is more convenient when making the machined part take out.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is a schematic structural view showing a connection relationship between the rotating unit and the frame;

fig. 3 is a partially enlarged view of a portion a in fig. 2.

Reference numerals: 1. a frame; 11. a chute; 2. a pressure roller; 3. a first rolling roller; 4. a second rolling roller; 5. a rotating device; 51. rotating the disc; 52. a linkage assembly; 521. a worm gear; 522. rotating the rod; 53. a drive assembly; 531. a drive member; 532. a worm; 6. a lifting device; 61. a sliding seat; 62. a lifting assembly; 621. a lifting motor; 622. rotating the screw; 7. a drive device; 71. a drive motor; 72. fixing the sleeve; 8. a clamping device; 81. a mounting frame; 82. a clamping sleeve; 83. rotating the screw; 9. a guide rod.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

Referring to fig. 1 and 2, for the high accuracy steel sheet edge rolling equipment that this application discloses, including frame 1, the pinch roller 2 of setting in frame 1, edge rolling roller 3 and edge rolling roller two 4 are equal high parallel and level setting in the width direction of frame 1 on frame 1, pinch roller 2 sets up between edge rolling roller 3 and edge rolling roller two 4, and edge rolling roller 3 and edge rolling roller two 4 set up with the central axis symmetry of pinch roller 2, edge rolling roller 3 and edge rolling roller two 4 all with frame 1 normal running fit. When the cut steel plate needs to be rolled, the steel plate is firstly placed on the first rolling roller 3 and the second rolling roller 4. Be provided with the elevating gear 6 that the drive pinch roller 2 goes up and down on the frame 1, place the steel sheet and accomplish the back, start elevating gear 6, drive pinch roller 2 descends, makes the upper surface of pinch roller 2 butt at the steel sheet of treating the edge rolling to compress tightly the steel sheet.

Wherein, referring to fig. 1 and 2, elevating gear 6 is including the sliding seat 61 that is used for driving pinch roller 2 to go up and down and elevating assembly 62 that is used for driving sliding seat 61 to go up and down, and elevating assembly 62 sets up in frame 1, and elevating assembly 62 includes elevator motor 621 and rotation screw 622, and elevator motor 621 is fixed to be set up in frame 1, and elevator motor 621's output shaft and frame 1 normal running fit. The rotating screw 622 is coaxially fixed on an output shaft of the lifting motor 621, the rotating screw 622 is vertically arranged, and the lifting motor 621 is started to drive the rotating screw 622 to rotate. Referring to fig. 3, the sliding seat 61 is disposed on the lifting assembly 62, the rotating screw 622 is sleeved with the sliding seat 61, two sliding seats 61 are disposed along the length direction of the pressure roller 2, the sliding seat 61 is in threaded fit with the rotating screw 622, and the rotating screw 622 can drive the sliding seat 61 to move when rotating. Since the sliding seat 61 is slidably engaged with the frame 1, the sliding seat 61 can slide on the rotating screw 622 for lifting movement. The fixed guide bar 9 that is provided with of one end of keeping away from elevator motor 621 in frame 1, the vertical setting of guide bar 9, and sliding seat 61 slip cap locate on guide bar 9, sliding seat 61 drives compressing roller 2 and goes up and down when rotating on screw 622, drives another sliding seat 61 and slides on guide bar 9 simultaneously. When the pinch roller 2 descends, the pinch roller 2 can be pressed against the steel plate, and then the steel plate is subjected to a rounding operation.

Referring to fig. 1 and 2, the pressing roller 2 is provided with a driving device 7 for driving the pressing roller 2 to rotate, and after the pressing roller 2 presses the steel plate, the driving device 7 is started to drive the pressing roller 2 to rotate so as to perform edge rolling processing on the steel plate. The driving device 7 comprises a driving motor 71 and a fixed sleeve 72, the driving motor 71 is fixedly arranged on the sliding seat 61, and an output shaft of the driving motor 71 is in rotating fit with the sliding seat 61. The fixing sleeve 72 is fixedly disposed on the output shaft of the driving motor 71, and the fixing sleeve 72 is sleeved on the pressure roller 2. One end of the pressure roller 2, which is far away from the driving motor 71, is provided with a clamping device 8 for clamping the pressure roller 2, and the clamping device 8 is installed on the sliding seat 61. Carry out the fixed centre gripping with pinch roller 2 through clamping device 8 and fixed sleeve 72, start driving motor 71, drive fixed sleeve 72 and rotate, drive pinch roller 2 and rotate, pinch roller 2 drives the steel sheet and rotates, the steel sheet drives edge-curling roller 3 and edge-curling roller two 4 and rotates simultaneously, and the rotation direction of edge-curling roller 3 and edge-curling roller two 4 is opposite with pinch roller 2's rotation direction, through pinch roller 2, edge-curling roller 3 and edge-curling roller two 4 carry out the edge-curling processing with the steel sheet.

Referring to fig. 2 and 3, after the steel sheet is rolled, the workpiece is removed from the pressure roller 2. Clamping device 8 includes mounting bracket 81, centre gripping sleeve 82 and rotatory screw 83, fixedly on the sliding seat 61 be provided with the supporting seat, through mounting bracket 81 sliding fit on the supporting seat, mounting bracket 81 and sliding seat 61 sliding fit. Referring to fig. 1, the clamping sleeve 82 is rotatably connected to the mounting frame 81, and the clamping sleeve 82 is sleeved on the pressure roller 2, so that when the pressure roller 2 rotates, the clamping sleeve 82 can be driven to rotate in the mounting frame 81. Rotatory screw rod 83 wears to locate in the mounting bracket 81, and rotatory screw rod 83 and mounting bracket 81 screw-thread fit, and the fixed knob that is provided with on the rotatory screw rod 83 makes things convenient for operating personnel to rotate rotatory screw rod 83. When the workpiece needs to be taken down from the pressing roller 2, the operator rotates the knob to drive the rotating screw 83 to rotate, so that the mounting frame 81 slides on the supporting seat, and meanwhile, the clamping sleeve 82 is driven to move in the direction away from the pressing roller 2. After the clamping sleeve 82 moves for a certain distance, the pressing roller 2 is pulled out of the fixed sleeve 72, and then the workpiece is taken down from the pressing roller 2, so that the steel plate is processed.

Referring to fig. 1 and 2, a rotating device 5 is arranged on the frame 1, the rotating device 5 is used for rotatably adjusting the positions of the first rolling roller 3 and the second rolling roller 4, and when the steel plate needs to be processed into cylinders with different diameters, the rotating device 5 is started to drive the first rolling roller 3 and the second rolling roller 4 to be adjusted. The rotating device 5 comprises a rotating disc 51 used for pushing the first edge rolling roller 3 and the second edge rolling roller 4 to be close to or far away from each other, a linkage component 52 used for driving the rotating disc 51 to rotate and a driving component 53 used for driving the linkage component 52 to rotate, the driving component 53 is arranged on the rack 1, the driving component 53 comprises a driving part 531 and a worm 532, the driving part 531 is fixedly arranged on the rack 1, the driving part 531 can directly adopt a motor to form, and an output shaft of the motor is in running fit with the rack 1. The worm 532 is coaxially fixed on the driving part 531, and the rack 1 rotatably supports the worm 532, so that the driving part 531 is started to drive the worm 532 to rotate.

Referring to fig. 1 and 2, the linkage assembly 52 is disposed on the driving assembly 53, and the linkage assembly 52 is disposed on the worm 532. The linkage assembly 52 comprises a worm wheel 521 and a rotating rod 522, wherein the worm wheel 521 abuts against a worm 532, and the worm wheel 521 is meshed with the worm 532. When the worm 532 rotates, the worm wheel 521 can be driven to rotate. The rotating rod 522 is fixedly arranged in the worm wheel 521 in a penetrating manner, the rotating disc 51 is fixedly arranged on the rotating rod 522, and when the worm wheel 521 rotates, the rotating rod 522 is driven to rotate, so that the rotating disc 51 is driven to rotate. Since the central axis of the rotating disk 51 is parallel to and not collinear with the central axis of the rotating rod 522, the rotating rod 522 is eccentrically disposed on the rotating disk 51, and the first and second rounding

rollers

3 and 4 abut against the rotating disk 51. When the rotating disc 51 rotates, the first rolling roller 3 and the second rolling roller 4 can be driven to move. The frame 1 is provided with the chute 11, the chute 11 is inclined towards the direction close to the compressing roller 2 along the vertical direction, the first 3 and the second 4 rolling rollers are in sliding fit in the chute 11, when the rotating disc 51 rotates, the first 3 and the second 4 rolling rollers can be driven to slide along the chute 11 for adjustment, so that the distance between the first 3 and the second 4 rolling rollers can be adjusted, and the requirement for processing the steel plate into cylinders with different diameters can be met. And after the first edge rolling roller 3 and the second edge rolling roller 4 are adjusted, edge rolling processing is carried out on the steel plate.

The implementation principle of the embodiment is as follows: when the operation of rolling up circle is carried out to the steel sheet that cuts, place the steel sheet on a roll circle roller 3 and a roll circle roller two 4 earlier, start elevator motor 621 after that, drive and rotate screw rod 622, it moves to drive sliding seat 61, it descends to drive pinch roller 2, pinch roller 2 compresses tightly the back on the steel sheet, start driving motor 71, it rotates to drive fixed sleeve 72, it rotates to drive pinch roller 2, pinch roller 2 drives the steel sheet and rotates, the steel sheet drives a roll circle roller 3 and a roll circle roller two 4 and rotates simultaneously, through pinch roller 2, a roll circle roller 3 and a roll circle roller two 4 carry out the edge rolling with the steel sheet and handle. After the processing is completed, the operator rotates the knob to drive the rotating screw 83 to rotate, so that the mounting frame 81 slides to drive the clamping sleeve 82 to move for a distance towards one end away from the pressing roller 2, the pressing roller 2 is pulled out from the fixing sleeve 72, then the workpiece is taken down from the pressing roller 2, and the processing of the steel plate is completed. When the steel plate needs to be machined into cylinders with different diameters, the driving part 531 is started, the worm 532 is driven to rotate, the worm wheel 521 is driven to rotate, the rotating rod 522 is driven to rotate, the rotating disc 51 is driven to rotate, the first rolling roller 3 and the second rolling roller 4 are driven to slide and adjust along the sliding groove 11, and after the adjustment is completed, the steel plate is rolled.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A high-precision steel plate edge rolling device comprises a rack (1), a pressing roller (2), an edge rolling roller (3) and an edge rolling roller (4) which are arranged on the rack (1), wherein the edge rolling roller (3) and the edge rolling roller (4) are arranged on the rack (1) in a flush manner along the width direction of the rack (1), the pressing roller (2) is arranged between the edge rolling roller (3) and the edge rolling roller (4), and the edge rolling roller (3) and the edge rolling roller (4) are symmetrically arranged along the central axis of the pressing roller (2), and is characterized in that a rotating device (5) is arranged on the rack (1), the rotating device (5) comprises a rotating disc (51) for pushing the edge rolling roller (3) and the edge rolling roller (4) to be close to or far away from each other, a linkage assembly (52) for driving the rotating disc (51) to rotate and a driving assembly (53) for driving the linkage assembly (52) to rotate, the driving assembly (53) is arranged on the rack (1), the linkage assembly (52) is arranged on the driving assembly (53), the rotating disc (51) is arranged on the linkage assembly (52), and the rack (1) is provided with a lifting device (6) for driving the pressing roller (2) to lift.

2. The high-precision steel plate rolling equipment according to claim 1, wherein: drive assembly (53) include driving piece (531) and worm (532), driving piece (531) set up on frame (1), worm (532) coaxial fixation is on driving piece (531), frame (1) rotates worm (532) and supports, linkage assembly (52) set up on worm (532).

3. A high precision steel plate rolling apparatus according to claim 2, wherein: linkage subassembly (52) include worm wheel (521) and dwang (522), worm wheel (521) butt is on worm (532), and worm wheel (521) and worm (532) mesh mutually, dwang (522) are fixed to be worn to locate in worm wheel (521), rolling disc (51) are fixed to be set up on dwang (522), the central axis of rolling disc (51) is parallel and not collineation with the central axis of dwang (522), spout (11) have been seted up on frame (1), in rolling round roller (3) and the equal sliding chute (11) of rolling round roller (4), and rolling round roller (3) and rolling round roller (4) butt on dwang (51).

4. The high-precision steel plate rolling equipment according to claim 1, wherein: the lifting device (6) comprises a sliding seat (61) used for driving the pressing roller (2) to lift and a lifting assembly (62) used for driving the sliding seat (61) to lift, the lifting assembly (62) is arranged on the rack (1), and the sliding seat (61) is arranged on the lifting assembly (62).

5. The high precision steel plate rolling equipment of claim 4, characterized in that: lifting unit (62) include elevator motor (621) and rotation screw rod (622), elevator motor (621) are fixed to be set up in frame (1), rotate screw rod (622) coaxial fixation on elevator motor's (621) output shaft, sliding seat (61) cover is located and is rotated on screw rod (622), sliding seat (61) and rotation screw rod (622) screw-thread fit, and sliding seat (61) and frame (1) sliding fit.

6. The high-precision steel plate rolling equipment according to claim 1, wherein: be provided with drive pinch roller (2) pivoted drive arrangement (7) on pinch roller (2), drive arrangement (7) include driving motor (71) and fixed sleeve (72), driving motor (71) are fixed to be set up on sliding seat (61), fixed sleeve (72) are fixed to be set up on driving motor's (71) output shaft, and fixed sleeve (72) cover is located on pinch roller (2).

7. The high precision steel plate rolling equipment of claim 4, characterized in that: one end, far away from the driving motor (71), of the pressing roller (2) is provided with a clamping device (8) used for clamping the pressing roller (2), and the clamping device (8) is installed on the sliding seat (61).

8. The high precision steel plate rolling apparatus of claim 7, wherein: clamping device (8) include mounting bracket (81), centre gripping sleeve (82) and rotatory screw rod (83), mounting bracket (81) sliding fit is on sliding seat (61), centre gripping sleeve (82) rotate to be connected on mounting bracket (81), and centre gripping sleeve (82) cover locate on pinch roller (2), rotatory screw rod (83) are worn to locate in mounting bracket (81), and rotatory screw rod (83) and mounting bracket (81) screw-thread fit.