CN109139870B

CN109139870B - Adjustable rack

Info

Publication number: CN109139870B
Application number: CN201810992876.7A
Authority: CN
Inventors: 方咫
Original assignee: Zhuji Xiawi Flower And Wood Farm
Current assignee: ZHUJI MINGXUAN SEWING EQUIPMENT Co.,Ltd.
Priority date: 2018-08-29
Filing date: 2018-08-29
Publication date: 2020-06-12
Anticipated expiration: 2038-08-29
Also published as: CN109139870A

Abstract

The invention discloses an adjustable rack which comprises a bottom plate, wherein a rectangular cavity is formed in the bottom plate, an adjusting hole communicated with the cavity is formed in the side wall of the bottom plate, the adjusting hole is of a cylindrical structure, a plurality of fixed bearings which are arranged at equal intervals are fixedly connected to the inner bottom wall of the bottom plate along the central line, the straight rack and the helical rack can be easily and directly switched through an adjusting knob, the operation is simple, a straight gear or a helical gear can be matched according to needs, the application range is expanded, and the use is convenient. Through nut and threaded rod isotructure, have auto-lock nature, the knob is located the adjusting hole simultaneously, effectively prevents unexpected rotation, realizes once fixing, and rethread first screens pole or second screens pole insert the constant head tank and carry out the secondary and fix, further improve the stability of using. The knob can be adjusted by hand or by a screwdriver, so that the operation is more convenient.

Description

Adjustable rack

Technical Field

The invention relates to the relevant field of electromechanical equipment, in particular to an adjustable rack.

Background

Electromechanical equipment is used in daily life in a large amount, a large number of gears and racks are needed to be used in the electromechanical equipment in a matched mode, the gears can be divided into straight gears and helical gears, tooth profile contact lines of the straight gears are straight lines parallel to an axis, a pair of tooth profiles enter into meshing or exit from meshing along the tooth width at the same time, impact and noise are easily caused, and transmission stability is poor. The meshing line of the bevel gears is an oblique line, and the bevel gears have stronger transmission capability, lower noise and stable rotation compared with straight gears. However, the axial force component is detrimental to the gearing as compared to a spur gear, which increases the friction between the devices making the devices prone to wear or damage.

The rack matched with the gear is a special gear with teeth distributed on the strip-shaped body, the rack is also divided into a straight rack and a helical rack, the straight rack and the helical rack are respectively matched with a straight cylindrical gear and a helical cylindrical gear for use, the rotation can be changed into linear motion, the tooth trace of the straight rack is a straight line vertical to the motion direction of the teeth, the tooth profile of the rack is a straight line instead of an involute, and the tooth profile is equivalent to a cylindrical gear with the reference circle radius of infinity.

The existing rack is simple in structure and single in function, only can be matched with a straight rack or a helical rack, but in the actual production process, the use condition is complex, a straight gear and a helical gear need to be selected for use according to the actual condition, the common rack cannot be adjusted, the common rack cannot be applied to different gears, and inconvenience exists in use.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide an adjustable rack, a threaded rod is driven to rotate by rotating a knob, a nut is driven to move, a gear is driven to rotate by taking a rotating shaft as a circle center, the angle of the gear is changed, the switching between the straight rack form and the inclined rack form is realized, meanwhile, the adjustable rack has self-locking performance through structures such as the nut and the threaded rod, meanwhile, the knob is positioned in an adjusting hole, the accidental rotation is effectively prevented, the primary fixing is realized, and then a first clamping rod or a second clamping rod is inserted into a positioning groove to perform secondary fixing on the gear, so that the use stability is further improved.

The purpose of the invention can be realized by the following technical scheme:

the invention provides an adjustable rack, which comprises a bottom plate, wherein a rectangular cavity is formed in the bottom plate, adjusting holes communicated with the cavity are formed in the side wall of the bottom plate, the adjusting holes are of a cylindrical structure, a plurality of fixed bearings which are arranged at equal intervals are fixedly connected to the inner bottom wall of the bottom plate along the central line, the upper end surface of the bottom plate is rotatably connected with tooth parts which are arranged in parallel and at equal intervals and have the same number as the fixed bearings, the tooth parts are of a triangular prism structure, the center of the lower end surface of each tooth part is fixedly connected with a rotating shaft, the lower end of the rotating shaft penetrates through the upper end surface of the bottom plate and is fixedly inserted in the fixed bearings, a sliding groove along the arrangement direction of the tooth parts is formed in the front inner wall of the bottom plate, sliding blocks which have the same number as the fixed bearings are connected in a sliding manner, the sliding blocks are, the one end of threaded rod is fixed to be pegged graft in positioning bearing, positioning bearing fixed connection is on the inside wall that the regulation hole was kept away from to the bottom plate, the other end of threaded rod runs through the inside and the fixedly connected with knob that the lateral wall of bottom plate reachd the regulation hole, one section fixed the cup joint that the threaded rod is located the regulation hole inside has spacing bearing, the inner wall fixed connection of spacing bearing and regulation hole, the lateral wall that the slider was kept away from to the nut rotates the one end that is connected with the peg graft pole, the other end activity of peg graft pole has cup jointed the telescope tube, telescope tube fixed connection is on the lateral wall of.

Further, the knob is in a triangular prism structure.

Furthermore, one side of the lower end surface of the bottom plate, which is far away from the sliding groove, is provided with an accommodating groove, each fixed bearing is matched with a positioning device, the positioning device comprises a first positioning pipe and a second positioning pipe, the upper ends of the first positioning pipe and the second positioning pipe are communicated with the upper end surface of the bottom plate, the lower ends of the first positioning pipe and the second positioning pipe are fixedly connected to the inner bottom wall of the bottom plate and communicated with the accommodating groove, the first positioning pipe is movably inserted with a first clamping rod, the second positioning pipe is movably inserted with a second clamping rod, the lower ends of all the first clamping rods are fixedly connected to the same first inserting strip, the lower ends of all the second clamping rods are fixedly connected to the same second inserting strip, the second inserting strip and the first inserting strip are movably inserted in the accommodating groove, and the second inserting strip and the first inserting strip are connected with the inner top wall of the accommodating groove through springs, the lower end face of the tooth piece is provided with a positioning groove matched with the second clamping rod and the first clamping rod, and the inner top wall of the positioning groove is fixedly connected with a permanent magnet sheet.

Furthermore, the lower end faces of the second inserting strip and the first inserting strip are connected with pull ropes.

Furthermore, the first and second slips have the same structure, and the width of the first and second slips is half of the width of the accommodating groove.

Furthermore, a cross-shaped groove is formed in the side wall, far away from the limiting bearing, of the knob.

When the invention is in the form of a straight rack, the second clamping rod is inserted into the positioning groove to be adsorbed and fixed with the permanent magnetic sheet, and the second inserting strip can be pulled out from the accommodating groove through the pull rope, so that the second clamping rod is separated from the positioning groove, and the tooth piece is unlocked. Can rotate the knob with the hand or screwdriver, it rotates to drive the threaded rod, because slider and nut fixed connection, make the nut unable and the threaded rod synchronous rotation, consequently the nut can only follow the direction motion of sliding tray, simultaneously because pivot relative position is unchangeable, then the nut motion can drive the inserted bar and rotate, and then drive the pivot and rotate, further drive the tooth spare and use the pivot to rotate as the centre of a circle, when the positioning groove is rotatory to coaxial with first registration arm, first screens pole is attracted by the permanent magnetism piece, overcome the elasticity of spring and insert in the positioning groove, it is fixed with the tooth spare, switch the form of helical rack this moment promptly. The first inserting strip is pulled out from the accommodating groove through the pull rope, the first clamping rod is separated from the positioning groove, the gear piece is unlocked, and the knob is rotated reversely at the moment, so that the shape of the spur rack can be switched again.

The invention has the beneficial effects that:

(1) through adjust knob, can relax at the spur rack and the direct switch of helical rack, easy operation can match straight-teeth gear or helical gear as required, has enlarged application scope, facilitates the use.

(2) Through nut and threaded rod isotructure, have auto-lock nature, the knob is located the adjusting hole simultaneously, effectively prevents unexpected rotation, realizes once fixing, and rethread first screens pole or second screens pole insert the constant head tank and carry out the secondary and fix, further improve the stability of using.

(3) The knob can be adjusted by hand or by a screwdriver, so that the operation is more convenient.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the helical gear pattern of the present invention;

FIG. 3 is a bottom view of the present invention;

FIG. 4 is a top view of the internal structure of the present invention;

FIG. 5 is a sectional view A-A of FIG. 4;

FIG. 6 is an enlarged view of portion B of FIG. 4;

fig. 7 is a schematic view of the construction of the tooth of the present invention.

In the figure: the positioning device comprises a bottom plate 1, a transmission component 11, a limiting bearing 111, a fixed bearing 112, a telescopic sleeve 113, an insertion rod 114, a nut 115, a sliding block 116, a threaded rod 117, a knob 118, a first inserting strip 12, a first positioning tube 13, a first clamping rod 14, a second inserting strip 15, a second positioning tube 16, a second clamping rod 17, a positioning bearing 18, a tooth part 2, a positioning groove 21, a rotating shaft 22 and a permanent magnet sheet 23.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 4, the present embodiment provides an adjustable rack, which includes a bottom plate 1, a rectangular cavity is formed inside the bottom plate 1, a regulating hole communicated with the cavity is formed on a side wall of the bottom plate 1, the regulating hole is of a cylindrical structure, a plurality of fixed bearings 112 are fixedly connected to a bottom wall of the bottom plate 1 along a central line, the fixed bearings 112 are equidistantly arranged, a plurality of tooth members 2 are rotatably connected to an upper end surface of the bottom plate 1 for fixing a rotating shaft 22, the number of the tooth members 2 is equal to that of the fixed bearings 112, the tooth members 2 are of a triangular prism structure, a longitudinal section of each tooth member 2 is an isosceles triangle, the center of a lower end surface of each tooth member 2 is fixedly connected to the rotating shaft 22, the lower end of the rotating shaft 22 penetrates through the upper end surface of the bottom plate 1 and is fixedly inserted into the fixed bearings 112, a sliding groove is formed on a front inner wall of the bottom plate 1 along an arrangement direction of the tooth, the sliding block 116 is fixedly connected on the outer side wall of the nut 115, the nut 115 is in threaded connection with a threaded rod 117, the nut 115 and the threaded rod 117 are used, self-locking performance can be achieved, the tooth part 2 can be fixed, one end of the threaded rod 117 is fixedly inserted into the positioning bearing 18, the positioning bearing 18 is fixedly connected on the inner side wall, far away from the adjusting hole, of the bottom plate 1, the other end of the threaded rod 117 penetrates through the side wall of the bottom plate 1 to reach the inside of the adjusting hole and is fixedly connected with a knob 118, the knob 118 is of a triangular prism structure and is convenient to twist, a cross groove is formed in the side wall, far away from the limiting bearing 111, of the knob 118, namely adjustment can be carried out by using a cross screwdriver, one section, located inside the adjusting hole, of the threaded rod 117 is fixedly connected with the limiting bearing 111, the limiting bearing 111 is fixedly connected with the inner, the telescopic sleeve 113 is fixedly connected to the side wall of the rotating shaft 22.

As shown in fig. 4 and 5, a containing groove is formed on one side of the lower end surface of the bottom plate 1 far away from the sliding groove, each fixed bearing 112 is matched with a positioning device, the positioning device comprises a first positioning pipe 13 and a second positioning pipe 16, the first positioning pipe 13 and the second positioning pipe 16 are positioned on the same circle with the fixed bearing 112 as the center and the radius of r, the upper ends of the first positioning pipe 13 and the second positioning pipe 16 are communicated with the upper end surface of the bottom plate 1, the lower ends of the first positioning pipe 13 and the second positioning pipe 16 are fixedly connected to the inner bottom wall of the bottom plate 1 and communicated with the containing groove, the first positioning pipe 13 is movably inserted with a first clamping rod 14, the second positioning pipe 16 is movably inserted with a second clamping rod 17, the lower ends of all the first clamping rods 14 are fixedly connected to the same first inserting strip 12, the lower ends of all the second clamping rods 17 are fixedly connected to the same second inserting strip 15, first cutting 12 is the same with second cutting 15's structure, and first cutting 12 is half of accomodating the groove width with second cutting 15's width, second cutting 15 is pegged graft in accomodating the groove with first cutting 12 is all movable, and second cutting 15 is connected with the interior roof of accomodating the groove through the spring with first cutting 12, the lower terminal surface of second cutting 15 and first cutting 12 all is connected with the stay cord, be convenient for pull out second cutting 15 and first cutting 12 and accomodate the groove, as shown in fig. 7, the constant head tank 21 that matches second screens pole 17 and first screens pole 14 is seted up to the lower terminal surface of tooth spare 2, the interior roof fixedly connected with permanent magnetism piece 23 of constant head tank 21, second screens pole 17 and first screens pole 14 are the magnetic metal pole, and adsorb fixedly with permanent magnetism piece 23 after inserting constant head tank 21, further fix tooth spare 2, double locking, and stability is better.

Through adjust knob 118, can be light at the spur rack and the direct switch of helical rack, easy operation can match straight-teeth gear or helical gear as required, has enlarged application scope, facilitates the use. Through nut 115 and threaded rod 117 isotructure, have the auto-lock nature, knob 118 is located the adjusting hole simultaneously, effectively prevents unexpected rotation, realizes once fixing, and rethread first screens pole 14 or second screens pole 17 insert the constant head tank 21 and carry out the secondary and fix, further improve the stability of using. The knob 118 can be adjusted by hand or by a screwdriver, so that the operation is more convenient.

The specific working process of this embodiment is as follows:

1) when the gear piece 2 is in a straight rack shape, the second clamping rod 17 is inserted into the positioning groove 21 and is adsorbed and fixed with the permanent magnet sheet 23, and the second inserting strip 15 can be pulled out of the accommodating groove through the pull rope, so that the second clamping rod 17 is separated from the positioning groove 21, and the gear piece 2 is unlocked.

2) The knob 118 can be rotated by hand or a screwdriver to drive the threaded rod 117 to rotate, because the sliding block 116 is fixedly connected with the nut 115, the nut 115 cannot rotate synchronously with the threaded rod 117, the nut 115 can only move along the direction of the sliding groove, meanwhile, because the relative position of the rotating shaft 22 is unchanged, the nut 115 moves to drive the inserting rod 114 to rotate, further, the rotating shaft 22 is driven to rotate, the gear 2 is further driven to rotate by taking the rotating shaft 22 as the center of a circle, when the positioning groove 21 rotates to be coaxial with the first positioning pipe 13, the first clamping rod 14 is attracted by the permanent magnet sheet 23, the elasticity of a spring is overcome, the gear 2 is inserted into the positioning groove 21, and the gear 2 is fixed, and at the moment, the gear is switched to the.

3) The first rack 12 is pulled out from the receiving groove through the pull rope, the first position clamping rod 14 is separated from the positioning groove 21, the gear piece 2 is unlocked, and the knob 118 is rotated reversely at the moment, so that the state can be switched to the straight rack form again.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.

Claims

1. An adjustable rack comprises a bottom plate (1) and is characterized in that a rectangular cavity is formed in the bottom plate (1), adjusting holes communicated with the cavity are formed in the side wall of the bottom plate (1), the adjusting holes are of a cylindrical structure, a plurality of fixed bearings (112) which are arranged at equal intervals are fixedly connected to the inner bottom wall of the bottom plate (1) along the center line, the upper end face of the bottom plate (1) is rotatably connected with tooth pieces (2) which are arranged in parallel and at equal intervals and have the same number as the fixed bearings (112), the tooth pieces (2) are of a triangular prism structure, a rotating shaft (22) is fixedly connected to the center of the lower end face of each tooth piece (2), the lower end of each rotating shaft (22) penetrates through the upper end face of the bottom plate (1) and is fixedly inserted in the fixed bearings (112), and a sliding groove along the arrangement direction of the tooth pieces (2) is formed in the front inner wall of the bottom, the sliding groove is connected with sliding blocks (116) with the same number as that of the fixed bearings (112) in a sliding mode, the sliding blocks (116) are fixedly connected to the outer side wall of a nut (115), the nut (115) is connected with a threaded rod (117) in a threaded mode, one end of the threaded rod (117) is fixedly inserted into a positioning bearing (18), the positioning bearing (18) is fixedly connected to the inner side wall, away from an adjusting hole, of the bottom plate (1), the other end of the threaded rod (117) penetrates through the side wall of the bottom plate (1) to reach the inside of the adjusting hole and is fixedly connected with a knob (118), one section, located inside the adjusting hole, of the threaded rod (117) is fixedly sleeved with a limiting bearing (111), the limiting bearing (111) is fixedly connected with the inner wall of the adjusting hole, the side wall, away from the sliding blocks (116), of the nut (115) is rotatably connected with one end of an insertion rod, the telescopic sleeve (113) is fixedly connected to the side wall of the rotating shaft (22).

2. Adjustable rack according to claim 1, wherein the knob (118) is of triangular prism configuration.

3. The adjustable rack according to claim 1, wherein a receiving groove is formed in one side of the lower end surface of the base plate (1) away from the sliding groove, each fixed bearing (112) is matched with a positioning device, the positioning device comprises a first positioning tube (13) and a second positioning tube (16), the upper ends of the first positioning tube (13) and the second positioning tube (16) are communicated with the upper end surface of the base plate (1), the lower ends of the first positioning tube (13) and the second positioning tube (16) are fixedly connected to the inner bottom wall of the base plate (1) and communicated with the receiving groove, a first clamping rod (14) is movably inserted into the first positioning tube (13), a second clamping rod (17) is movably inserted into the second positioning tube (16), and the lower ends of all the first clamping rods (14) are fixedly connected to the same first inserting strip (12), all the lower extreme fixed connection of second screens pole (17) is on same second cutting (15), second cutting (15) and first cutting (12) are all the activity pegs graft in accomodating the groove, and second cutting (15) and first cutting (12) all are connected through spring and the interior roof of accomodating the groove, constant head tank (21) of matching second screens pole (17) and first screens pole (14) are seted up to the lower terminal surface of tooth spare (2), the interior roof fixedly connected with permanent magnet piece (23) of constant head tank (21).

4. An adjustable rack according to claim 3, wherein the lower end surfaces of the second and first inserts (12, 15) are connected with a pull rope.

5. The adjustable rack according to claim 3, wherein the first and second inserts (12, 15) have the same structure, and the width of the first and second inserts (12, 15) is half of the width of the receiving groove.

6. The adjustable rack according to claim 1, wherein the side wall of the knob (118) remote from the limit bearing (111) is provided with a cross-shaped groove.