CN213106052U

CN213106052U - Grinding device for new material with dustproof function

Info

Publication number: CN213106052U
Application number: CN202021410719.XU
Authority: CN
Inventors: 韩梅霞; 叶秋娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-05-04
Anticipated expiration: 2030-07-16

Abstract

The utility model relates to the technical field of new material processing, in particular to a polishing device for new materials with a dustproof function, which can automatically polish and remove dust and has high working efficiency; including grinding device, grinding device includes the stand that four groups are connected with the pneumatic cylinder, two sets of first lead screw of being connected with first motor and the second lead screw of being connected with the second motor, first lead screw links to each other with the stand top, be provided with the first screw nut of connecting the second lead screw on the first lead screw, be provided with second screw nut on the second lead screw, second screw nut below fixedly connected with installs the grinding motor of emery wheel of polishing, still include dust collector, dust collector includes the dust absorption side pipe that the bottom is provided with the blow vent, the blow vent passes through connecting tube and links to each other with the adsorption fan air intake, adsorption fan air outlet and dust removal box lateral wall intercommunication, the inside dust removal sack that is provided with of dust removal box, sack dust removal export and dust removal box top intercommunication, dust removal sack exit is provided with filter fan.

Description

Grinding device for new material with dustproof function

Technical Field

The utility model relates to a new material processing technology field, especially a grinding device for new material with dustproof function.

Background

As is well known, new materials refer to materials which are newly developed or are being developed and have super-group performance, and the new materials have more excellent performance than traditional materials, in recent years, new materials are more and more valued, the country also values the development of new materials, the new materials need to be polished for many times in the process of new material development, the existing new material polishing is generally that workers manually polish the new materials through a polisher, the automation degree is not high, the polishing operation efficiency is low, and many dusts are generated during polishing, the workers suck the dusts for a long time to cause certain damage to the bodies of the workers, and the dusts can be splashed onto the eyes of the workers, so that the working state of the workers can be influenced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides an degree of automation is high, and the operating efficiency of polishing is high and can adsorb the dust that produces when polishing and collect the grinding device for new material that has dustproof function.

(II) technical scheme

In order to realize the aim, the utility model provides the following technical scheme, the polishing device for the new material with the dustproof function comprises a polishing device and a dust removing device, the polishing device comprises a base, four groups of upright posts, two groups of first lead screws, second lead screws and polishing motors, four groups of round holes are symmetrically arranged at four corners of the upper end of the base, the bottom ends of the four groups of upright posts respectively extend into the four groups of round holes, connecting rods are respectively arranged between the two groups of upright posts at the left side and between the two groups of upright posts at the right side, the front and rear ends of the connecting rods are respectively fixedly connected with the side walls of the front and rear groups of upright posts, hydraulic cylinders are respectively arranged at the left and right sides of the upper end of the base, the output ends of the hydraulic cylinders are fixedly connected with the middle parts of the bottom, the left side of the first lead screw is fixedly connected with the output end of the first motor, the right side of the first lead screw is rotatably connected with the top end of the left side of the right upright post, two groups of the first lead screws are respectively provided with a first lead screw nut in a threaded manner, the rear end of the first lead screw nut at the front side is provided with a second motor, the second lead screw is arranged in the front-back direction, the front side of the second lead screw is fixedly connected with the output end of the second motor, the rear side of the second lead screw is rotatably connected with the front end of the first lead screw nut at the rear side, the second lead screw is provided with a second lead screw nut in a threaded manner, the polishing motor is fixedly connected with the bottom of the second lead screw nut, the working end of the polishing motor faces downwards, a polishing grinding wheel is arranged at the working end of the polishing motor, the dust removal device comprises a dust removal box body, an adsorption fan and, the utility model discloses a dust collection box, including base, dust collection side pipe, adsorption fan air outlet, dust removal box, filter fan air inlet, dust collection side pipe, the base top is provided with the dust absorption side pipe that encircles a week, dust absorption side pipe is provided with the net of ventilating towards center one side, dust absorption side pipe bottom sets up a plurality of blow vents, a plurality of blow vents all with the adsorption fan air intake links to each other, the adsorption fan air outlet with dust removal box left side wall intercommunication, the inside dust removal sack that is provided with of dust removal box, dust removal sack export and dust removal box top intercommunication.

Preferably, a sliding rod is arranged above the second lead screw, the front end and the rear end of the sliding rod are fixedly connected with the front lead screw nut and the rear lead screw nut respectively, a through hole is formed in the upper end of the second lead screw nut, and the sliding rod penetrates through the through hole and is in clearance fit with the through hole.

Preferably, the bottom of the dust removal box body is provided with a drawing box used for collecting dust, and the middle part of the front side of the drawing box is provided with a drawing handle.

Preferably, still include water jet equipment, water jet equipment includes main water tank, water pipe, nozzle and link, main water tank sets up and is placing the intracavity, the bottom is provided with the water pump in the main water tank, the water pump output end lead to pipe with the nozzle links to each other, the link with grinding motor outer wall fixed connection, nozzle fixed connection is on the link right side.

Preferably, still include drainage device, drainage device includes the sewage case, the sewage case sets up and is placing the intracavity, the base top is provided with the water strainer, is provided with the basin below the water strainer, and the basin bottom is provided with the outlet, the outlet with sewage roof portion intercommunication, sewage case left side bottom is provided with the drain, is provided with the blowdown valve door on the drain.

Preferably, still include clamping device, clamping device includes two sets of third lead screws and two sets of third screw nut, relative fixed mounting is in both sides around the base top around two sets of third screw nut is around respectively, two sets of third screw nut's screw hole is the fore-and-aft direction, two sets of third lead screws are the spiral shell dress respectively and are passed two sets of third screw nut, two sets of third lead screws all are provided with the tight piece of clamp by the near-end, two sets of third lead screws are kept away from the end and are all provided with the regulation handle.

(III) advantageous effects

Compared with the prior art, the utility model provides a grinding device for new material with dustproof function possesses following beneficial effect:

1. the polishing device for the new material with the dustproof function has the advantages that the two groups of hydraulic cylinders synchronously move, the output ends of the left and right groups of hydraulic cylinders drive the four groups of upright posts to synchronously ascend or descend through the connection of the connecting rods, so that the polishing motors can be moved and adjusted in the vertical direction, the two groups of first motors synchronously rotate, when the first motors move, the two groups of first motors can synchronously drive the first lead screws to rotate, the two groups of first lead screw nuts cannot rotate due to the connection of the second motors and the second lead screws, so that when the first motors drive the first lead screws to rotate, the first lead screw nuts can move left and right under the action of the screw force, so that the polishing motors can be moved and adjusted in the horizontal direction, when the second motors move, the second motors can drive the second lead screws to rotate, and the upper ends of the second lead screw nuts cannot rotate due to the connection of the second, when the second motor drives the second lead screw to rotate, the second lead screw nut can move back and forth under the action of the threaded force, so that the polishing motor can be moved and adjusted in the front and back directions, and the hydraulic cylinder, the first motor and the second motor are matched for use, so that the polishing motor can be moved and adjusted in all six directions, the whole polishing process can be automatically operated, and the polishing efficiency is improved;

2. in the in-process is carried out in the operation of polishing, dust collector is in the running state, adsorption fan operation produces wind-force, the dust that produces when polishing is in the wind-force effect by the net department of ventilating in proper order through dust absorption side pipe, vent and adsorption fan and get into the dust removal box, the dust removal box is in the encapsulated situation, the filtration fan operation produces wind-force, dust in the dust removal box moves to dust removal sack exit under the filtration fan wind-force effect, because the filtering action of dust removal sack, the dust is adsorbed in the dust removal sack outside, clean air passes the dust removal sack and is discharged in the air, when the filtration fan stops operating, the dust that adsorbs on the dust removal sack drops because of the action of gravity, dust collector's operation can concentrate the collection to the dust, thereby avoid causing the injury to.

Drawings

Fig. 1 is a schematic front view of the present invention;

fig. 2 is a left side view structure diagram of the present invention;

fig. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic structural view of the dust removing device of the present invention;

in the drawings, the reference numbers: 1. a base; 2. a column; 3. a first lead screw; 4. a second lead screw; 5. Polishing the motor; 6. a connecting rod; 7. a hydraulic cylinder; 8. a first motor; 9. a first lead screw nut; 10. a second motor; 11. a second lead screw nut; 12. grinding a grinding wheel; 13. a dust removal box body; 14. an adsorption fan; 15. a filter fan; 16. a ventilation net; 17. dust collection square tubes; 18. A vent; 19. a dust removal cloth bag; 20. a slide bar; 21. a box is drawn out; 22. pulling a handle; 23. a main water tank; 24. a water pipe; 25. a nozzle; 26; a connecting frame; 27. a water pump; 28. a sewage tank; 29. Adjusting the handle; 30. a water filtering net; 31. a water tank; 32. a water outlet; 33. a sewage draining outlet; 34. A blowdown valve; 35. a third lead screw; 36. a third lead screw nut; 37. and (5) clamping the blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the polishing device for new materials with dust-proof function of the present invention comprises a polishing device and a dust-removing device, wherein the polishing device comprises a base 1, four sets of upright posts 2, two sets of first lead screws 3, second lead screws 4 and polishing motors 5, four sets of round holes are symmetrically arranged at four corners of the upper end of the base 1, the bottom ends of the four sets of upright posts 2 respectively extend into the four sets of round holes, a connecting rod 6 is arranged between the two sets of upright posts 2 at the left side and between the two sets of upright posts 2 at the right side, the front and rear ends of the connecting rod 6 are respectively fixedly connected with the side walls of the front and rear sets of upright posts 2, hydraulic cylinders 7 are arranged at the left and right sides of the upper end of the base 1, the output ends of the hydraulic cylinders 7 are fixedly connected with the middle parts of the bottom ends of the connecting rods, two groups of first motors 8 rotate synchronously, two groups of first lead screws 3 are transversely arranged in a front-back opposite mode, the left sides of the first lead screws 3 are fixedly connected with the output ends of the first motors 8, the right sides of the first lead screws 3 are rotatably connected with the top end of the left side of a right upright post 2, the two groups of first lead screws 3 are both provided with first lead screw nuts 9 in a screwed mode, the rear ends of the first lead screw nuts 9 at the front sides are provided with second motors 10, the second lead screws 4 are arranged in a front-back direction, the front sides of the second lead screws 4 are fixedly connected with the output ends of the second motors 10, the rear sides of the second lead screws 4 are rotatably connected with the front ends of the first lead screw nuts 9 at the rear sides, the second lead screws 4 are provided with second lead screw nuts 11 in a screwed mode, the polishing motors are fixedly connected to the bottoms of the second lead screw nuts 11, the working ends of the polishing motors 5 face downwards, when the hydraulic cylinder 7 moves, the output ends of the left and right hydraulic cylinders 7 drive the four groups of upright posts 2 to synchronously ascend or descend through the connection of the connecting rod 6, so that the grinding motor 5 can be moved and adjusted in the up-and-down direction, when the first motor 8 moves, the two groups of first motors 8 can drive the first lead screw 3 to synchronously rotate, because the two groups of first lead screw nuts 9 are connected with the second lead screw 4 through the second motor 10 and cannot rotate, when the first motor 8 drives the first lead screw 3 to rotate, the first lead screw nuts 9 can move left and right under the action of screw force, so that the grinding motor 5 can be moved and adjusted in the left-and-right direction, when the second motor 10 moves, the second motor 10 can drive the second lead screw 4 to rotate, because the upper end of the second lead screw nut 11 is connected with the sliding rod 20 and cannot rotate, when the second motor 10 drives the second lead screw 4 to rotate, the second screw nut 11 can move back and forth under the action of a threaded force, so that the polishing motor 5 can be moved and adjusted in the front and back directions, the hydraulic cylinder 7, the first motor 8 and the second motor 10 are matched for use, so that the polishing motor 5 can be moved and adjusted in all six directions, the dust removal device comprises a dust removal box body 13, an adsorption fan 14 and a filter fan 15, a placing cavity is arranged in the base 1, the dust removal box body 13 is arranged in the placing cavity, a dust collection square pipe 17 surrounding a circle is arranged at the top end of the base 1, an air ventilation net 16 is arranged towards one side of the center of the dust collection square pipe 17, a plurality of air vents 18 are arranged at the bottom of the dust collection square pipe 17, the air vents 18 are all connected with an air inlet of the adsorption fan 14, an air outlet of the adsorption fan 14 is communicated with the left side wall of the, the outlet of the dust removing cloth bag 19 is communicated with the top of the dust removing box body 13, the air inlet of the filter fan 15 is connected with the outlet of the dust removing cloth bag 19, the air outlet of the filter fan 15 extends out of the right side of the base 1, the adsorption fan 14 runs to generate wind power, dust generated during polishing sequentially passes through the dust collection square pipe 17, the vent 18 and the adsorption fan 14 from the vent net 16 under the action of the wind power and enters the dust collection box body 13, the dust collection box body 13 is in a closed state, the filter fan 15 runs to generate wind power, the dust in the dust collection box body 13 moves to the outlet of the dust collection cloth bag 19 under the action of the wind power of the filter fan 15, due to the filtering action of the dust removing cloth bag 19, the dust is absorbed outside the dust removing cloth bag 19, the clean air passes through the dust removing cloth bag 19 and is discharged into the air, when the filter fan 15 stops operating, the dust adsorbed on the dust-removing cloth bag 19 falls down due to the gravity.

The utility model discloses a grinding device for new material with dustproof function, second lead screw 4 top is provided with slide bar 20, slide bar 20 around both ends respectively with around two sets of first lead screw nut 9 fixed connection, second lead screw nut 11 upper end is provided with the through-hole, slide bar 20 is in pass in the through-hole and with through-hole clearance fit, when second motor 10 drives second lead screw 4 rotatory, because second lead screw nut 11 upper end is connected with slide bar 20 and can't rotate, second lead screw nut 11 can carry out the fore-and-aft direction motion under the screw force effect.

The utility model discloses a grinding device for new material with dustproof function, dust removal bottom half is provided with the pull box 21 that collects the dust and use, and pull box 21 front side middle part is provided with draws 22, and the dust that gets into dust removal box 13 is concentrated and falls in pull box 21 under the effect of dust removal sack 19, can regularly take out pull box 21, the dust of clearance the inside through drawing 22.

The utility model discloses a grinding device for new material with dustproof function still includes water jet equipment, water jet equipment includes main water tank 23, water pipe 24, nozzle 25 and link 26, main water tank 23 sets up and is placing the intracavity, the bottom is provided with water pump 27 in the main water tank 23, water pump 27 output lead to pipe 24 with nozzle 25 links to each other, link 26 with 5 outer wall fixed connection of grinding motor, nozzle 25 fixed connection is in the link 26 right side, and water pump 27 takes out the water in the main water tank 23, sprays through nozzle 25, can cool down grinding device and material, also can adsorb some dust simultaneously.

The utility model discloses a grinding device for new material with dustproof function still includes drainage device, drainage device includes sewage case 28, sewage case 28 sets up and is placing the intracavity, 1 top of base is provided with water strainer 30, and water strainer 30 below is provided with basin 31, and basin 31 bottom is provided with outlet 32, outlet 32 with sewage case 28 top intercommunication, sewage case 28 left side bottom is provided with drain 33, is provided with blowdown valve 34 on the drain 33, and spun water accomplishes cooling and can see through water strainer 30 after adsorbing and enter into basin 31 in the nozzle 25, and rethread outlet 32 gets into in sewage case 28, realizes the collection work to sewage, and when sewage was more in sewage case 28, can open blowdown valve 34, sewage passes through drain 33 and discharges.

The utility model discloses a grinding device for new material with dustproof function still includes clamping device, clamping device includes two sets of third lead screw 35 and two sets of third lead screw nut 36, relative fixed mounting is in both sides around 1 top of base around two sets of third lead screw nut 36 are respectively, the screw hole of two sets of third lead screw nut 36 is the fore-and-aft direction, two sets of third lead screw 35 screw dress respectively passes two sets of third lead screw nut 36, two sets of third lead screw 35 all are provided with tight piece 37 of clamp by the near-end, two sets of third lead screw 35 keep away from the end and all are provided with adjustment handle 29, when needing to press from both sides tight polishing material, put polishing material in the middle of two sets of tight pieces 37 of clamp in the front and back, then rotate the adjustment handle 29 of both sides around, press from both sides tight piece 37 and pass through third lead screw 35's threaded connection effect and move in opposite directions.

The utility model discloses a polishing device with dust-proof function for new material, when using, two sets of pneumatic cylinders 7 synchronous motion, the output of left and right sets of pneumatic cylinders 7 drives four sets of stands 2 to rise or descend synchronously through the connection of connecting rod 6, thereby can carry out the up-and-down movement adjustment to polishing motor 5, two sets of first motors 8 rotate synchronously, when first motor 8 moves, two sets of first motors 8 can drive first lead screw 3 to rotate synchronously, because two sets of first lead screw nuts 9 are connected through second motor 10 and second lead screw 4 and can not rotate, when first motor 8 drives first lead screw 3 to rotate, first lead screw nut 9 can move left and right under the action of screw thread force, thereby can carry out the left-and-right movement adjustment to polishing motor 5, when second motor 10 moves, second motor 10 can drive second lead screw 4 to rotate, because the upper end of the second lead screw nut 11 is connected with the slide bar 20 and can not rotate, when the second motor 10 drives the second lead screw 4 to rotate, the second lead screw nut 11 can move back and forth under the action of screw force, so that the polishing motor 5 can be moved and adjusted in the front and back directions, the hydraulic cylinder 7, the first motor 8 and the second motor 10 are matched for use, so that the movement and adjustment of all six directions of the polishing motor 5 can be realized, thereby the whole polishing process can realize automatic operation, the polishing efficiency is improved, in the polishing operation process, the dust removing device is in an operation state, the adsorption fan 14 operates to generate wind power, dust generated in the polishing process sequentially passes through the dust collection square pipe 17, the vent 18 and the adsorption fan 14 under the action of wind power to enter the dust removal box body 13, the dust removal box body 13 is in a closed state, and the filtration fan 15 operates to generate wind power, dust moves to 19 exit of dust removal sack under the effect of filter fan 15 wind-force in the dust removal box 13, because the filtering action of dust removal sack 19, the dust is adsorbed in the 19 outsides of dust removal sack, and clean air passes dust removal sack 19 and is discharged in the air, and when filter fan 15 shut down, the dust that adsorbs on dust removal sack 19 drops because of the action of gravity, and dust collector's operation can concentrate the collection to the dust to avoid causing the injury to the staff health.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The polishing device with the dustproof function for the new material is characterized by comprising a polishing device and a dust removal device, wherein the polishing device comprises a base (1), four groups of stand columns (2), two groups of first lead screws (3), a second lead screw (4) and a polishing motor (5), four groups of round holes are symmetrically formed in four corners of the upper end of the base (1), the bottoms of the four groups of stand columns (2) respectively extend into the four groups of round holes, connecting rods (6) are respectively arranged between the two groups of stand columns (2) on the left side and between the two groups of stand columns (2) on the right side, the front ends and the rear ends of the connecting rods (6) are respectively fixedly connected with the side walls of the front and the rear two groups of stand columns (2), hydraulic cylinders (7) are respectively arranged on the left side and the right side of the upper end of the base (1), the output ends of the hydraulic cylinders (7) are fixedly connected with the, the two groups of first lead screws (3) are transversely arranged front and back oppositely, the left sides of the first lead screws (3) are fixedly connected with the output end of a first motor (8), the right sides of the first lead screws (3) are rotatably connected with the top end of the left side of a right side upright post (2), the two groups of first lead screws (3) are both provided with first lead screw nuts (9) in a threaded manner, the front sides of the first lead screws (3) are provided with second motors (10) at the rear ends of the first lead screw nuts (9), the second lead screws (4) are arranged in a front-back direction, the front sides of the second lead screws (4) are fixedly connected with the output end of the second motors (10), the rear sides of the second lead screws (4) are rotatably connected with the front ends of the first lead screw nuts (9), the second lead screw nuts (11) are arranged in a threaded manner on the second lead screws (4), the polishing motors are fixedly connected to the bottoms of the second lead screws (11), a grinding wheel (12) is arranged at the working end of the grinding motor (5), the dust removal device comprises a dust removal box body (13), an adsorption fan (14) and a filter fan (15), a placing cavity is arranged in the base (1), the dust removal box body (13) is arranged in the placing cavity, a dust collection square pipe (17) surrounding a circle is arranged at the top end of the base (1), an air ventilation net (16) is arranged on one side, facing the center, of the dust collection square pipe (17), a plurality of air vents (18) are arranged at the bottom of the dust collection square pipe (17), the air vents (18) are all connected with an air inlet of the adsorption fan (14), an air outlet of the adsorption fan (14) is communicated with the left side wall of the dust removal box body (13), a dust removal cloth bag (19) is arranged in the dust removal box body, and an outlet of the dust removal cloth, the air inlet of the filter fan (15) is connected with the outlet of the dust removal cloth bag (19), and the air outlet of the filter fan (15) extends out of the right side of the base (1).

2. The grinding device with the dustproof function for the new materials as claimed in claim 1, wherein a slide rod (20) is arranged above the second lead screw (4), the front end and the rear end of the slide rod (20) are respectively and fixedly connected with the front group of the first lead screw nuts (9) and the rear group of the first lead screw nuts, the upper end of the second lead screw nut (11) is provided with a through hole, and the slide rod (20) passes through the through hole and is in clearance fit with the through hole.

3. The grinding device with the dust-proof function for the new materials as claimed in claim 2, characterized in that a drawing box (21) for collecting dust is arranged at the bottom of the dust-removing box body, and a pull handle (22) is arranged in the middle of the front side of the drawing box (21).

4. The polishing device with the dust-proof function for the new material as claimed in claim 3, further comprising a water spraying device, wherein the water spraying device comprises a main water tank (23), a water pipe (24), a nozzle (25) and a connecting frame (26), the main water tank (23) is arranged in the placing cavity, a water pump (27) is arranged at the bottom in the main water tank (23), the output end of the water pump (27) is connected with the nozzle (25) through the water pipe (24), the connecting frame (26) is fixedly connected with the outer wall of the polishing motor (5), and the nozzle (25) is fixedly connected to the right side of the connecting frame (26).

5. The polishing device with the dustproof function for the new material as claimed in claim 4, further comprising a drainage device, wherein the drainage device comprises a sewage tank (28), the sewage tank (28) is arranged in the placing cavity, a water strainer (30) is arranged at the top end of the base (1), a water tank (31) is arranged below the water strainer (30), a water outlet (32) is arranged at the bottom of the water tank (31), the water outlet (32) is communicated with the top of the sewage tank (28), a drain outlet (33) is arranged at the bottom of the left side of the sewage tank (28), and a drain valve (34) is arranged on the drain outlet (33).

6. The grinding device with the dust-proof function for the new materials as claimed in claim 5, further comprising a clamping device, wherein the clamping device comprises two sets of third lead screws (35) and two sets of third lead screw nuts (36), the two sets of third lead screw nuts (36) are respectively and fixedly installed on the front and back sides of the top of the base (1) in a front-back direction, threaded holes of the two sets of third lead screw nuts (36) are in a front-back direction, the two sets of third lead screws (35) are respectively screwed and penetrate through the two sets of third lead screw nuts (36), clamping blocks (37) are arranged on the two sets of third lead screws (35) close to the proximal ends, and adjusting handles (29) are arranged on the two sets of third lead screws (35) far away from the distal ends.