CN114541906A - Positioning wheel device - Google Patents

Abstract

The invention relates to the technical field of daily hardware accessories, in particular to a positioning wheel device. The positioning wheel device comprises a fixed seat, a first positioning wheel assembly, a second positioning wheel assembly, a limiting nut and a screw piece; the first positioning wheel assembly comprises a first supporting plate with a first threaded hole, the second positioning wheel assembly comprises a second supporting plate, the fixed seat comprises a fixed supporting plate arranged between the first supporting plate and the second supporting plate, and the fixed supporting plate is provided with a first through hole; the limiting nut is movably arranged in the first through hole in a penetrating mode, a second threaded hole is formed in the limiting nut, and a first limiting structure is arranged on the limiting nut. The first support plate is adjusted back through the limit matching of the limit nut, the first support plate at the limit position is returned to a certain distance in the rotation of the screw piece, and the two first positioning wheels are controlled to be retracted left and right for a certain stroke.

Description

Positioning wheel device

Technical Field

The invention relates to the technical field of daily hardware accessories, in particular to a positioning wheel device.

Background

The door and window positioning wheel adjusting device is arranged on the translation sliding window or the sliding door and is matched with a correspondingly assembled track structure to prevent the window or the sliding door from swinging or being easily lifted and separated by external force; the door and window positioning wheel adjusting device is preferably arranged at the upper end face of the translation sliding window or the sliding door.

The existing door and window positioning wheel adjusting device mainly drives the anti-swing mechanism and the upward-pushing mechanism in sequence by arranging two driving mechanisms so as to prevent a window or a sliding door from swinging and prevent the window or the sliding door from deviating from a track. In the adjusting process, the anti-swing mechanism and the jacking mechanism are driven by threads generally, and have high stability.

However, in the actual debugging process, it is found that the anti-swing mechanism and the upward-pushing mechanism are easy to generate larger pressure, that is, the sliding capacity of the positioning wheel of the anti-swing mechanism or the upward-pushing mechanism is greatly influenced when the force is too large, and how to limit the unfolding strokes of the anti-swing mechanism and the upward-pushing mechanism after ensuring that the anti-swing mechanism and the upward-pushing mechanism are installed in place is one of the problems of intensive research by researchers in the field.

Disclosure of Invention

The invention aims to solve the technical problem that the positioning wheels of the anti-swing mechanism and the jacking mechanism are greatly influenced in sliding capacity when the positioning wheels are subjected to overlarge stress.

The technical scheme adopted by the invention for solving the technical problems is as follows: the positioning wheel device comprises a fixed seat, a first positioning wheel assembly, a second positioning wheel assembly, a limiting nut and a screw piece; wherein,

the first positioning wheel assembly comprises a first supporting plate with a first threaded hole, the second positioning wheel assembly comprises a second supporting plate, the fixed seat comprises a fixed supporting plate arranged between the first supporting plate and the second supporting plate, and the fixed supporting plate is provided with a first through hole;

the limiting nut is movably arranged in the first through hole in a penetrating mode and provided with a second threaded hole, and the limiting nut is provided with a first limiting structure so as to limit the moving stroke of the limiting nut;

the screw part comprises a first threaded section, a non-threaded section and a second threaded section, one end of the screw part is rotatably arranged on the second supporting plate, the moving stroke of the limiting nut at least comprises a part of the non-threaded section and the second threaded section, and the first threaded hole is in threaded connection with the first threaded section.

Wherein, the preferred scheme is: the first limiting structure comprises limiting parts arranged at two ends of the limiting nut.

Wherein, the preferred scheme is: and a second limiting structure is arranged between the limiting nut and the first through hole so as to limit the limiting nut to rotate relative to the first through hole.

Wherein, the preferred scheme is: the cross section of the first through hole is in a non-circular shape, the edge of the non-circular shape comprises a point A which is farthest from a central point by a distance D1 and a point B which is closest to a central store by a distance D2, the outer contour of the cross section of the limiting nut comprises a point C which is farthest from the central point by a distance D3, wherein D2< D3< D1.

Wherein, the preferred scheme is: the cross section of the first through hole is in a waist shape, the outer contour of the cross section of the limiting nut is also in a waist shape, and the size of the outer contour of the cross section of the limiting nut is close to that of the cross section of the first through hole.

Wherein, the preferred scheme is: a spring is arranged between the first supporting plate and the limiting nut, and the spring is sleeved on the screw piece.

Wherein, the preferred scheme is: the first resistance force generated by the movement of the first positioning wheel assembly is smaller than the second resistance force generated by the movement of the second positioning wheel assembly.

Wherein, the preferred scheme is: the first positioning wheel assembly further comprises a first sliding piece, the second positioning wheel assembly comprises a second sliding piece, the first supporting plate is arranged at one end of the first sliding piece, the second supporting plate is arranged at one end of the second sliding piece, and the first sliding piece and the second sliding piece are driven by the screw piece to move along the first direction relative to the fixed seat.

Wherein, the preferred scheme is: the second positioning wheel assembly further comprises a second positioning wheel, a guide plate, a rotating shaft and a second adjusting structure, the fixed seat comprises a fixed plate, the second positioning wheel is arranged on the rotating plate, the guide plate is arranged at the other end of the second sliding part, the rotating shaft penetrates through the fixed plate, the rotating plate and the guide plate, and the second adjusting structure is arranged between the guide plate and the rotating plate; wherein,

the guide plate is driven by the screw component to move along the first direction relative to the fixed seat, and the second adjusting structure drives the rotating plate to rotate on the second plane, so that the second positioning wheel is far away from or close to the fixed seat on the second plane.

Wherein, the preferred scheme is: the deflector includes the first waist type hole that sets up along second slider slip direction, the pivot passes first waist type hole setting, the second is adjusted the structure and is protruding including the direction that sets up on deflector or rotor plate one to and set up the second waist type hole that just inclines to set up on another, the protruding slip of direction sets up in second waist type hole, just the rotor plate passes through the second and adjusts the structure relatively fixed plate rotation setting.

Wherein, the preferred scheme is: the first positioning wheel assembly further comprises a first adjusting structure and two first positioning wheels arranged on the first adjusting structure, the first sliding piece moves relative to the fixed seat along a first direction, and the two first positioning wheels are unfolded or retracted on a first plane through the first adjusting structure.

Wherein, the preferred scheme is: first regulation structure includes horizontal rotation board and pivot, first locating wheel sets up the both ends at horizontal rotation board, horizontal rotation board rotates the setting through pivot and fixing base, first regulation structure is still including setting up the arc pore on first slider or horizontal rotation board one to and set up on another and block the direction boss in the arc pore, the first direction motion of edge of first slider makes the direction boss remove along the arc pore, thereby drives horizontal rotation board and rotates for first slider.

The invention has the beneficial effects that compared with the prior art, the adjusting action of the first supporting plate is realized through the limit matching of the limit nut, the first supporting plate and the second supporting plate which are positioned at the limit positions return to a certain distance or get rid of a tight compression state in the rotation of the screw member, the left and right recovery of the two first positioning wheels is controlled for a certain stroke, and the reduction of the sliding capacity of the first positioning wheels due to the fact that the positioning wheels are unfolded left and right or up and down and are blocked by the channel is avoided; the realization is relaxed simultaneously to the location of vertical direction and horizontal direction, not only makes the locating wheel can more smoothly slide, also can not influence stability, in the aspect of still operating, just can realize installation and "loose" through a screw spare to the structure is succinct, is convenient for improve production efficiency, and improves the yields.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

FIG. 1 is a schematic view of the positioning wheel assembly of the present invention;

FIG. 2 is a schematic structural view of the fixing base of the present invention having a first supporting plate, a second supporting plate and a fixing supporting plate;

FIG. 3 is a schematic structural view of a stop nut of the present invention;

FIG. 4 is a schematic view of a screw member according to the present invention;

FIG. 5 is a schematic view of the positioning wheel assembly of the present invention;

FIG. 6 is a schematic flow chart of the operation of the positioning wheel assembly of the present invention;

FIG. 7 is a schematic illustration of the shape definition of the first through hole and the spacing nut of the present invention;

FIG. 8 is an exploded view of the first positioning wheel assembly of the present invention;

FIG. 9 is a schematic illustration of an exploded construction of the second positioning wheel assembly of the present invention;

fig. 10 is a schematic diagram of an exploded structure of the positioning wheel device of the present invention.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 7, the present invention provides a preferred embodiment of a positioning wheel device.

A positioning wheel device comprises a fixed seat 100, a first positioning wheel assembly 200, a second positioning wheel assembly 300, a limit nut 500 and a screw member 400; wherein the first positioning wheel assembly 200 comprises a first support plate 210 having a first threaded hole 211, the second positioning wheel assembly 300 comprises a second support plate 310, the fixing base 100 comprises a fixing support plate 110 disposed between the first support plate 210 and the second support plate 310, and the fixing support plate 110 is provided with a first through hole 111; the limiting nut 500 is movably arranged in the first through hole 111 in a penetrating manner and is provided with a second threaded hole 530, and the limiting nut 500 is provided with a first limiting structure 520 so as to limit the moving stroke of the limiting nut 500; the screw member 400 comprises a first threaded section 401, an unthreaded section 403 and a second threaded section 402, one end of the screw member 400 is rotatably disposed on the second support plate 310, the movement stroke of the stop nut 500 comprises at least a part of the unthreaded section 403 and the second threaded section 402, and the first threaded section 211 is in threaded connection with the first threaded section 401.

Specifically, for convenience of description of the positioning wheel device and description of the limit nut 500, it is assumed that the first support plate 210 is disposed at the leftmost side, the second support plate 310 is disposed at the rightmost side, and the first limit structure 520 includes limit portions disposed at both ends of the limit nut 500, which are respectively defined as a left limit portion 521 and a right limit portion 522, the body of the limit nut 500 is inserted into the first through hole 111 of the fixed support plate 110, although the specific position may be adjusted according to the product itself, and the above-mentioned orientation is only defined for convenience of description and illustration; meanwhile, for convenience of explaining the rotation of the screw member 400, it is assumed that the clockwise rotation of the screw member 400 moves the first support plate 210 to the right, whereas the counterclockwise rotation moves the first support plate 210 to the left, and the above-mentioned left-right movement or rest is based on the fixing base 100 as a reference system. The first limiting structure 520 may also be other structures, such as a concave-convex structure, one of which is provided with a groove and the other is provided with a boss. The first threaded section 401, the non-threaded section 403 and the second threaded section 402 are sequentially arranged, so that regular movement of the first support plate, the limiting nut and the second support plate is facilitated.

With respect to the operation flow of the positioning wheel device, referring to fig. 5 and 6, wherein the drawing of fig. 6 is simplified, the screw member 400 is hidden, and the steps from step a to step F are sequentially performed, the arrow on the component indicates the moving direction during the step, the initial state a, the position limiting nut 500 is located at the unthreaded section 403, the screw member 400 starts to rotate clockwise, step B is performed, the first support plate 210 and the second support plate 310 are made to approach each other, here, also for convenience of describing the actual moving state of the first support plate 210 and the second support plate 310, it is assumed that the first resistance generated by the movement of the first positioning wheel assembly 200 is smaller than the second resistance generated by the movement of the second positioning wheel assembly 300, that is, the first support plate 210 moves rightwards under the rotation of the threads of the first threaded hole 211 and the screw member 400, the second support plate 310 is fixed due to the resistance, and at the same time, the position limiting nut 500 is located at the unthreaded section 403, the rotation of the screw member 400 does not affect the position-limiting nut 500, i.e., the distance between the position-limiting nut 500 and the second support plate 310 is constant, and the second support plate 310 can be kept in a constant position until the first support plate 210 is at the most extreme position; when the first support plate 210 is at the extreme position, the position of the first support plate 210 is unchanged, and the screw member 400 is continuously rotated clockwise, step C is performed, since the position of the first support plate 210 is unchanged, the first resistance generated by the movement of the first positioning wheel assembly 200 is much greater than the second resistance generated by the movement of the second positioning wheel assembly 300, so that the second support plate 310 moves leftwards, and the distance between the second support plate 310 and the stop nut 500 is shortened until the stop nut 500 is located at the second thread section 402, in the subsequent process, the stop nut 500 can be located rightmost from the initial state (the stop nut 500 can be already located rightmost at step B), or in the subsequent process, the stop nut 500 moves rightmost slowly, and the position of the stop nut 500 at the rightmost position means that the left position-limiting part 521 of the stop nut 500 is close to the fixed support plate 110, at this time, the stop nut 500 is in threaded connection with the second thread section 402, the force is applied to the right to approach the second support plate 310, and the left-side limiting portion 521 of the limiting nut 500 is pressed against the fixed support plate 110 until the second support plate 310 is at the most extreme position; rotating the screw member 400 counterclockwise, entering step D, so that the first support plate 210 and the second support plate 310 are away from each other, at this time, a first resistance generated by the movement of the first positioning wheel assembly 200 is smaller than a second resistance generated by the movement of the second positioning wheel assembly 300, the second support plate 310 is fixed and does not move due to the resistance, the first support plate 210 starts to move to the left, meanwhile, the limit nut 500 is also away from the second support plate 310, the limit nut 500 also starts to move to the left, until the right limit portion 522 of the limit nut 500 abuts against and presses against the fixed support plate 110, and the returning action of the first support plate 210 is realized; continuing to rotate the screw member 400 counterclockwise, proceeding to steps E and F, since the stop nut 500 and the second support plate 310 must be moved away from each other, the stop nut 500 cannot be moved to the left any more, and only the second support plate 310 wants to be moved to the right, and ideally, the right movement of the second support plate 310 offsets the left movement of the first support plate 210, the first support plate 210 remains stationary, or slightly to the left or right, until the stop nut 500 returns to the unthreaded section 403, at the same time, the second support plate 310 moves to the rightmost side, the first support plate 210 may continue to move to the left and to the leftmost side after the second support plate 310 moves to the rightmost side, alternatively, the first support plate 210 is moved leftward while the second support plate 310 is moved to near the rightmost side, and the first support plate 210 and the second support plate 310 are moved to the leftmost side and the rightmost side simultaneously or sequentially, respectively.

Before the screw member 400 is rotated counterclockwise, the first support plate 210 and the second support plate 310 are both in the extreme positions, that is, the positioning wheel is in extreme close contact with the external structure, although the positioning wheel device is stable enough for positioning the door or window, the positioning wheel device may not slide smoothly due to too close contact. Therefore, after the screw member 400 starts to rotate counterclockwise, the left-side limiting portion 521 of the limiting nut 500 is firstly loosened from the fixed support plate 110 at the first moment, so that the positioning wheel corresponding to the second support plate 310 is changed from the tight state to the loose state, which is, of course, the actual positioning wheel position is not changed or is changed a little bit relative to the tight state; meanwhile, because the first supporting plate 210 starts to move leftwards, the positioning wheel corresponding to the first supporting plate 210 retracts, namely, the positioning wheel is changed from a tight state to a loose state, the positioning in the vertical direction and the horizontal direction is simultaneously released, the positioning wheel can slide more smoothly, the stability cannot be influenced, in the aspect of operation, the mounting and loosening can be realized through the screw piece 400, the structure is simple, the production efficiency is convenient to improve, and the yield is improved.

Through the limiting effect of the limiting nut 500 and the fixed supporting plate 110, the first resistance generated by the movement of the first positioning wheel assembly 200 and the second resistance generated by the movement of the second positioning wheel assembly 300 are changed, so as to adjust the moving modes of the first supporting plate 210 and the second supporting plate 310, and the core is that the first supporting plate 210 is firstly returned to a certain distance and then the second supporting plate 310 is returned to the original position and simultaneously or subsequently the first supporting plate 210 is returned to the original position in the process of rotating the screw member 400 anticlockwise.

In one embodiment, the stop nut 500 ensures smooth movement during the engagement with the screw member 400, the stop nut 500 must be prevented from rotating and only move in the first through hole 111, and therefore a second stop structure is disposed between the stop nut 500 and the first through hole 111 to limit the rotation of the stop nut 500 relative to the first through hole 111.

There are many embodiments of the second limiting structure, for example, a mechanical second limiting structure is provided between the limiting nut 500 and the first through hole 111 or the fixed support plate 110, or an additional part is provided between the two to ensure that the limiting nut 500 does not rotate, preferably, the movement of the limiting nut 500 is not affected, for example, the outer surface of the limiting nut 500 is provided with a groove strip, and the first through hole 111 is provided with a protruding part extending into the groove strip.

However, it is also possible to limit by the shape of the first through hole 111 and the limit nut 500 as the second limit structure, particularly to minimize interference caused by movement of the limit nut 500, i.e., to generate frictional resistance only in the contact area therebetween. Specifically, referring to fig. 7, the cross section of the first through hole 111 has a non-circular shape, and the edge of the non-circular shape includes a point a farthest from the center point by a distance D1 and a point B closest to the center store by a distance D2, and the outer contour of the cross section of the limiting nut 500 includes a point C farthest from the center point by a distance D3, wherein D2< D3< D1. As long as it is ensured that the farthest distance D3 of the point C of the limiting nut 500 is between the farthest distance D1 and the nearest distance D2, and preferably the center point of the non-circular shape is collinear with the center point of the cross-section of the limiting nut 500, the limiting nut 500 rotates in the first through hole 111, and the outer contour is inevitably jammed in the edge of the non-circular shape, and the corresponding rotation cannot be continued.

Preferably, the cross section of the first through hole 111 is a kidney-shaped shape, the outer contour of the cross section of the limit nut 500 is also a kidney-shaped shape, the size of the outer contour of the cross section of the limit nut 500 is close to the size of the cross section of the first through hole 111, the kidney-shaped shape can be that the side edge is a straight line, the upper edge and the lower edge are arc lines, the kidney-shaped shape is simple to manufacture and uniform in stress, the damage to the first through hole 111 or the limit nut 500 is very low, in addition, the limit nut 500 can be ensured to have enough internal area to form the second threaded hole 530, and the hardness of the second threaded hole 530 can be ensured to meet the requirements. Of course, other shapes are possible, such as one side being a straight line and the remaining three sides being an arc, such as an elliptical shape, e.g., a polygonal shape, etc.

In one embodiment, when the limit nut 500 is located in the non-threaded section 403, it is ensured that the limit nut 500 can be quickly clamped into the second threaded section 402, and the precision of the operation of the positioning wheel device is ensured, a spring is arranged between the first support plate 210 and the limit nut 500, the spring is sleeved on the screw member 400, the limit nut 500 is pressed to the right through the spring sleeve, and particularly when the limit nut 500 is located in the non-threaded section 403, the left limit part 521 of the limit nut 500 is close to or abuts against the fixed support plate 110.

As shown in fig. 1, 2, 8-10, the present invention provides a preferred embodiment of the first positioning wheel assembly 200 and the second positioning wheel assembly 300.

The first positioning wheel assembly 200 further includes a first sliding member 220, the second positioning wheel assembly 300 includes a second sliding member 320, the first supporting plate 210 is disposed at one end of the first sliding member 220, the second supporting plate 310 is disposed at one end of the second sliding member 320, and both the first sliding member 220 and the second sliding member 320 are driven by the screw member 400 to move in a first direction relative to the fixing base 100.

With respect to the first positioning wheel assembly 200, the first positioning wheel assembly 200 further has a first adjusting structure, and the first sliding member 220 moves in a first direction relative to the fixed base 100, and the first adjusting structure enables the two first positioning wheels 240 to extend or retract on a first plane; the first adjusting structure is respectively connected to the first sliding member 220 and the two first positioning wheels 240, the first sliding member 220 is driven by the screw member 400 to move along a first direction relative to the fixing base 100, and the first adjusting structure can be driven by the first sliding member 220 to move along a second direction and drive the two first positioning wheels 240 disposed thereon to extend or retract on a first plane. It is assumed that the fixing base 100 is horizontally fixed on the side, the first direction is the length direction of the fixing base 100, i.e. the first sliding member 220 moves along the first direction, and the second direction is the direction perpendicular to the length direction and horizontally arranged, i.e. the two first positioning wheels 240 move in a left-right expanding and contracting manner. Wherein, the substrate is assumed to be horizontally placed, and the first plane is a horizontal plane.

Specifically, the first sliding member 220 is disposed on one side of the fixing base 100, the first adjusting structure includes a horizontal rotating plate 230, the first positioning wheels 240 are disposed at two ends of the horizontal rotating plate 230, the horizontal rotating plate 230 is rotatably disposed with the fixing base 100 through a rotating shaft 250, the first adjusting structure further includes an arc-shaped hole 221 disposed on one of the first sliding member 220 or the horizontal rotating plate 230, and a guiding boss 222 disposed on the other and clamped in the arc-shaped hole 221, the first sliding member 220 moves along a first direction, which causes the guiding boss 222 to move along the arc-shaped hole 221, so as to drive the horizontal rotating plate 230 to rotate relative to the first sliding member 220, i.e., rotate relative to the fixing base 100, thereby moving the two first positioning wheels 240 in a left-right expanding and contracting manner. Preferably, the first sliding part 220, the horizontal rotating plate 230 and the fixing seat 1001 are of a plate structure, the horizontal rotating plate 230, the first sliding part 220 and the fixing seat 100 are sequentially stacked up and down, a waist-shaped groove 223 is formed in the first sliding part 220, the rotating shaft 250 passes through the waist-shaped groove 223 and is respectively connected with the horizontal rotating plate 230 and the fixing seat 100, the arc-shaped hole 221 is formed in the first sliding part 220, the arc-shaped path is obliquely bent along a first direction, and the guide boss 222 is formed on the horizontal rotating plate 230.

Of course, the connection between the first sliding member 220 and the horizontal rotating plate 230 may be in other manners, as long as the force generated by the first sliding member 220 moving along the first direction is converted into the force generated by the horizontal rotating plate 230 rotating horizontally, for example, a rack and a gear are disposed between the first sliding member 220 and the horizontal rotating plate 230, and the gear is driven to rotate by the rack moving along the first direction. Moreover, the first adjusting structure may also be other structures, such as a diamond-shaped telescopic structure, the first positioning wheel 240 is disposed at the left and right end angles of the diamond-shaped telescopic structure, is fixedly disposed on the fixing base 100 along one end angle in the first direction, is connected with the first sliding member 220 along the other end angle in the first direction, and is driven by the first sliding member 220 to open or retract the left and right end angles.

Preferably, the first sliding member 220 moves backward relative to the fixed base 100, and the first adjusting structure enables the two first positioning wheels 240 to expand left and right, whereas the first sliding member 220 moves forward relative to the fixed base 100, and the first adjusting structure enables the two first positioning wheels 240 to retract left and right.

Regarding the second positioning wheel assembly 300, the second positioning wheel assembly 300 further includes a second positioning wheel 331, a guide plate 321, a rotating plate 330, a rotating shaft 340 and a second adjusting structure, the fixed base 100 includes the fixed plate 120, the second positioning wheel 331 is disposed on the rotating plate 330, the guide plate 321 is disposed at the other end of the second sliding member 320, the rotating shaft 340 is disposed through the fixed plate 120, the rotating plate 330 and the guide plate 321, and the second adjusting structure is disposed between the guide plate 321 and the rotating plate 330; the guide plate 321 is driven by the screw 400 to move along a first direction relative to the fixing base 100, and the second adjusting structure drives the rotating plate 330 to rotate on a second plane, so that the second positioning wheel 331 is far away from or close to the fixing base 100 on the second plane.

In one embodiment, the guide plate 321 is disposed on the second sliding member 320, and the second sliding member 320 is moved along the first direction relative to the fixing base 100 by the screw member 400. It is assumed that the fixing base 100 is horizontally and fixedly disposed on a side surface, the first direction is a length direction of the fixing base 100, that is, the second sliding member 320 moves along the first direction, and the third direction is a direction perpendicular to the length direction and vertically disposed, that is, the second positioning wheel 331 moves up and down.

The guide plate 321 includes a first kidney-shaped hole 3211 arranged along the sliding direction of the second sliding member 320, the rotating shaft 340 passes through the first kidney-shaped hole 3211, the second adjusting structure includes a guide protrusion arranged on one of the guide plate 321 or the rotating plate 330, and a second kidney-shaped hole arranged on the other and inclined, the guide protrusion is slidably arranged in the second kidney-shaped hole, and the rotating plate 330 is rotatably arranged relative to the fixing plate 120 through the second adjusting structure. In the process that the second sliding member 320 moves along the first direction, the guide plate 321 and the rotating plate 330 are matched with the second kidney-shaped hole through the guide protrusion, so that the rotating plate 330 rotates and vertically turns relative to the fixed plate 120, that is, the second positioning wheel 331 is driven to move up and down.

The fixed plate 120, the rotating plate 330 and the guide plate 321 are arranged in sequence, and the fixed plate 120, the rotating plate 330 and the guide plate 321 are arranged in sequence, the core is that the fixed plate 120 is inevitably used as a support plate of the rotating shaft 340, and the rotating plate 330 and the guide plate 321 are close to each other to realize movement turning, so that the movement state in the first direction is changed into the movement state in the third direction. Preferably, the second sliding member 320 moves forward relative to the fixed base 100, and the second adjusting structure moves the second positioning wheel 331 upward, whereas, the second sliding member 320 moves backward relative to the fixed base 100, and the second adjusting structure moves the second positioning wheel 331 downward.

In another embodiment, a first resistance generated by the movement of the first positioning wheel assembly 200 is smaller than a second resistance generated by the movement of the second positioning wheel assembly 300, and the second positioning wheel assembly 300 itself or a resistance structure is arranged between the second positioning wheel assembly 300 and the fixed base 100, which is equivalent to the second resistance, in order to improve the assembly stability and rationality of the positioning wheel device, in practical application, it is necessary to perform left-right positioning by the first positioning wheel assembly 200, i.e. control the two first positioning wheels 240 to expand left and right to a maximum stroke, and then perform up-down positioning by the second positioning wheel assembly 300, i.e. control the second positioning wheel 331 to ascend to a maximum stroke, so as to achieve positioning, wherein the positioning wheel device is installed in various door and window structures, preferably a sliding door and window structure, preferably the fixed base 100 is arranged in a channel of the door and window structure, and is limited in a channel of the door and window frame by the first positioning wheel 240 and the second positioning wheel 331, the channel of the door and window structure is clamped with the channel of the door and window frame and moves under the matching of the two channels.

Meanwhile, in cooperation with the stop nut 500, after the assembly is completed, the screw member 400 can be continuously rotated in the reverse direction, so that the first support plate 210 returns, that is, the two first positioning wheels 240 are controlled to be retracted left and right for a certain stroke, and the situation that the two first positioning wheels 240 are unfolded left and right and are blocked with the channel is avoided, so that the sliding capacity of the first positioning wheels 240 is reduced.

In another embodiment, the first slider 220 and the second slider 320 are respectively disposed on two sides of the fixing base 100, and the first supporting plate 210 and the second supporting plate 310 are both vertically disposed on the same side with respect to the fixing base 100; and the end of the second support plate 310 is a U-shaped clamping structure, the nut of the screw 400 abuts against the second support plate 310 and passes through the second through hole 311 of the second support plate 310, and the rod part of the screw is clamped in the U-shaped opening of the U-shaped clamping structure. The first sliding part 220 and the second sliding part 320 are respectively disposed on two side surfaces of the fixing base 100, and both the first sliding part 220 and the second sliding part 320 can be disposed adjacent to the fixing base 100, and can move independently without being affected, and meanwhile, the overall stability is improved, and in order to facilitate the screw 400 to pass through the first through hole 111 of the second support plate 310 and the first threaded hole 211 of the first support plate 210, the first support plate 210 and the second support plate 310 need to be disposed on the same side vertically with respect to the fixing base 100, a bending structure can be provided, or a notch is disposed on the fixing base 100, so that the first support plate 210 and the second support plate 310 are disposed on the same side, preferably, the first sliding part 220 is disposed on the upper side surface of the fixing base 100, the second sliding part 320 is disposed on the lower side surface, the fixing base 100 is disposed with a notch, and the second support plate 310 passes through the notch and is disposed on the upper side surface.

Of course, the screw member 400 further includes a nut and a card fixedly disposed on the screw rod, the second support plate 310 is disposed between the nut and the card, and the screw rod is connected to the second through hole 311 of the second support plate 310 in a limiting manner through the nut and the card. The card is preferably U type clamping structure, and the installation of being convenient for is and firm.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, but rather as embodying the invention in a wide variety of equivalent variations and modifications within the scope of the appended claims.

Claims (12)

1. A positioning wheel device is characterized in that: the positioning wheel device comprises a fixed seat, a first positioning wheel assembly, a second positioning wheel assembly, a limiting nut and a screw piece; wherein,

the first positioning wheel assembly comprises a first supporting plate with a first threaded hole, the second positioning wheel assembly comprises a second supporting plate, the fixed seat comprises a fixed supporting plate arranged between the first supporting plate and the second supporting plate, and the fixed supporting plate is provided with a first through hole;

the limiting nut is movably arranged in the first through hole in a penetrating mode and provided with a second threaded hole, and the limiting nut is provided with a first limiting structure so as to limit the moving stroke of the limiting nut;

the screw part comprises a first threaded section, a non-threaded section and a second threaded section, one end of the screw part is rotatably arranged on the second supporting plate, the moving stroke of the limiting nut at least comprises a part of the non-threaded section and the second threaded section, and the first threaded hole is in threaded connection with the first threaded section.

2. The positioning wheel device according to claim 1, wherein: the first limiting structure comprises limiting parts arranged at two ends of a limiting nut.

3. The positioning wheel device according to claim 1, wherein: and a second limiting structure is arranged between the limiting nut and the first through hole so as to limit the limiting nut to rotate relative to the first through hole.

4. The positioning wheel device according to claim 1, wherein: the cross section of the first through hole is in a non-circular shape, the edge of the non-circular shape comprises a point A which is farthest from a central point by a distance D1 and a point B which is closest to a central store by a distance D2, the outer contour of the cross section of the limiting nut comprises a point C which is farthest from the central point by a distance D3, wherein D2< D3< D1.

5. The positioning wheel device according to claim 1, wherein: the cross section of the first through hole is in a waist shape, the outer contour of the cross section of the limiting nut is also in a waist shape, and the size of the outer contour of the cross section of the limiting nut is close to that of the cross section of the first through hole.

6. The positioning wheel device according to claim 1, wherein: a spring is arranged between the first supporting plate and the limiting nut, and the spring is sleeved on the screw piece.

7. The positioning wheel device according to any one of claims 1 to 6, wherein: the first resistance force generated by the movement of the first positioning wheel assembly is smaller than the second resistance force generated by the movement of the second positioning wheel assembly.

8. The positioning wheel device according to claim 1, wherein: the first positioning wheel assembly further comprises a first sliding piece, the second positioning wheel assembly comprises a second sliding piece, the first supporting plate is arranged at one end of the first sliding piece, the second supporting plate is arranged at one end of the second sliding piece, and the first sliding piece and the second sliding piece are driven by the screw piece to move along the first direction relative to the fixed seat.

9. The positioning wheel device according to claim 8, wherein: the second positioning wheel assembly further comprises a second positioning wheel, a guide plate, a rotating shaft and a second adjusting structure, the fixed seat comprises a fixed plate, the second positioning wheel is arranged on the rotating plate, the guide plate is arranged at the other end of the second sliding part, the rotating shaft penetrates through the fixed plate, the rotating plate and the guide plate, and the second adjusting structure is arranged between the guide plate and the rotating plate; wherein,

the guide plate is driven by the screw part to move along the first direction relative to the fixed seat, and the second adjusting structure drives the rotating plate to rotate on the second plane, so that the second positioning wheel is far away from or close to the fixed seat on the second plane.

10. The positioning wheel device according to claim 9, wherein: the deflector includes the first waist type hole that sets up along second slider slip direction, the pivot passes first waist type hole setting, the second is adjusted the structure and is protruding including the direction that sets up on deflector or rotor plate one to and set up the second waist type hole that just inclines to set up on another, the protruding slip of direction sets up in second waist type hole, just the rotor plate passes through the second and adjusts the structure relatively fixed plate rotation setting.

11. The positioning wheel device according to claim 8, wherein: the first positioning wheel assembly further comprises a first adjusting structure and two first positioning wheels arranged on the first adjusting structure, the first sliding piece moves relative to the fixed seat along a first direction, and the two first positioning wheels are unfolded or retracted on a first plane through the first adjusting structure.

12. The positioning wheel device according to claim 11, wherein: first regulation structure includes horizontal rotation board and pivot, first locating wheel sets up the both ends at horizontal rotation board, horizontal rotation board rotates the setting through pivot and fixing base, first regulation structure is still including setting up the arc pore on first slider or horizontal rotation board one to and set up on another and block the direction boss in the arc pore, the first direction motion of edge of first slider makes the direction boss remove along the arc pore, thereby drives horizontal rotation board and rotates for first slider.

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