A positioning wheel device

Abstract

The application relates to the technical field of hardware fittings, in particular to a positioning wheel device. The positioning wheel device comprises a fixing base, 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 fixing base comprises a fixing supporting plate arranged between the first supporting plate and the second supporting plate, and the fixing supporting plate is provided with a first through hole; the limiting nut is movably arranged in the first through hole and is provided with a second threaded hole; and the limiting nut is provided with a first limiting structure. Through the limiting cooperation of the limiting nut, the returning action of the first supporting plate is realized, the first supporting plate at the limit position is returned by a certain distance in the rotation of the screw piece, and the two first positioning wheels are controlled to be recycled by a certain stroke.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hardware fittings, in particular to a positioning wheel device. BACKGROUND

[0002] The door and window positioning wheel adjusting device is used for being installed on a sliding push-pull window or a sliding door, cooperating with a corresponding track structure, preventing the window or the sliding door from swinging or being easily lifted out of the track; the door and window positioning wheel adjusting device is preferably arranged at the upper end surface of the sliding push-pull window or the sliding door.

[0003] The existing door and window positioning wheel adjusting device mainly drives the anti-swing mechanism and the upper lifting mechanism in sequence through two driving mechanisms to prevent the window or the sliding door from swinging and being lifted out of the track. In the adjusting process, the anti-swing mechanism and the upper lifting mechanism are generally driven by threads, and have strong stability.

[0004] However, in the actual debugging process, it is found that the anti-swing mechanism and the upper lifting mechanism are prone to generate large pressure, that is, the positioning wheels of the anti-swing mechanism or the upper lifting mechanism are greatly affected in sliding ability when the force is too large, and how to limit the unfolding stroke of the anti-swing mechanism and the upper lifting mechanism after ensuring that the anti-swing mechanism and the upper lifting mechanism are installed in place is one of the problems that researchers in the field focus on. SUMMARY

[0005] The technical problem solved by the present application is to provide a positioning wheel device to solve the problem that the positioning wheels of the anti-swing mechanism and the upper lifting mechanism are greatly affected in sliding ability when the force is too large, in view of the above defects of the prior art.

[0006] The technical solution adopted by the present application to solve the technical problem is to provide a positioning wheel device, which comprises a fixed seat, a first positioning wheel assembly, a second positioning wheel assembly, a limiting nut and a screw piece, wherein,

[0007] 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;

[0008] The limiting nut is movably arranged in the first through hole and is provided with a second threaded hole, and the limiting nut is provided with a first limiting structure to limit the movement stroke of the limiting nut;

[0009] The screw piece comprises a first threaded section, a non-threaded section and a second threaded section, one end of the screw piece is rotatably arranged on the second supporting plate, the movement stroke of the limiting nut at least includes the non-threaded section and the second threaded section, and the first threaded hole is threadedly connected with the first threaded section.

[0010] Preferably, the first limiting structure comprises a limiting portion arranged at two ends of the limiting nut.

[0011] Preferably, a second limiting structure is arranged between the limiting nut and the first through hole to limit rotation of the limiting nut relative to the first through hole.

[0012] Preferably, the first through hole has a non-circular cross section, and the non-circular cross section has an edge including a point A with a distance D1 farthest from a center point and a point B with a distance D2 closest to the center point, and the limiting nut has a cross section with an outer contour including a point C with a distance D3 farthest from the center point, wherein D2 < D3 < D1.

[0013] Preferably, the first through hole has a waist-shaped cross section, and the limiting nut has a waist-shaped cross section, and the limiting nut has a cross section with an outer contour close to a size of the first through hole.

[0014] Preferably, a spring is arranged between the first support plate and the limiting nut, and the spring is sleeved on the screw member.

[0015] Preferably, the first positioning wheel assembly generates a first resistance smaller than a second resistance generated by the second positioning wheel assembly.

[0016] Preferably, the first positioning wheel assembly further comprises a first sliding member, the second positioning wheel assembly comprises a second sliding member, the first support plate is arranged at one end of the first sliding member, the second support plate is arranged at one end of the second sliding member, and the first sliding member and the second sliding member are moved relative to the fixed seat along the first direction under the driving of the screw member.

[0017] Preferably, the second positioning wheel assembly further comprises a second positioning wheel, a guide plate, a rotating 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 member, the rotating shaft passes 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,

[0018] The guide plate is moved relative to the fixed seat along the first direction under the driving of the screw member, and the rotating plate is rotated on the second plane through the second adjusting structure, so that the second positioning wheel is away from or close to the fixed seat on the second plane.

[0019] Preferably, the guide plate comprises a first waist-shaped hole arranged along the sliding direction of the second sliding member, the rotating shaft is arranged through the first waist-shaped hole, the second adjusting structure comprises a guide protrusion arranged on one of the guide plate or the rotating plate, and a second waist-shaped hole arranged on the other and arranged obliquely, the guide protrusion is arranged slidingly in the second waist-shaped hole, and the rotating plate is arranged rotatably relative to the fixed plate through the second adjusting structure.

[0020] Preferably, 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 member moves relative to the fixed seat along the first direction, and the two first positioning wheels are expanded or retracted on the first plane through the first adjusting structure.

[0021] Preferably, the first adjusting structure comprises a horizontal rotating plate and a rotating shaft, the first positioning wheels are arranged at two ends of the horizontal rotating plate, the horizontal rotating plate is arranged rotatably with the fixed seat through the rotating shaft, the first adjusting structure further comprises an arc-shaped channel arranged on one of the first sliding member or the horizontal rotating plate, and a guide boss arranged on the other and clamped into the arc-shaped channel, the movement of the first sliding member along the first direction causes the guide boss to move along the arc-shaped channel, thereby driving the horizontal rotating plate to rotate relative to the first sliding member.

[0022] The present application has the advantages that, compared with the prior art, the present application realizes the retraction of the first support plate through the limiting cooperation of the limiting nut, in the rotation of the screw member, the first support plate and the second support plate in the limit position are returned by a certain distance or are out of the close pressing state, the two first positioning wheels are controlled to be retracted by a certain stroke, the sliding ability of the first positioning wheel is reduced due to the expansion of the positioning wheel left and right or up and down and the jamming of the channel, the positioning in the vertical direction and the horizontal direction is simultaneously released, the positioning wheel can slide more smoothly, the stability is not affected, in terms of operation, the installation and "loosening" can be realized through one screw member, the structure is simple, the production efficiency is improved, and the yield is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in combination with the drawings and examples, and the drawings are as follows:

[0024] Figure 1 is a structural schematic view of the positioning wheel device of the present application;

[0025] Figure 2 is a structural schematic view of the fixed seat provided with the first support plate, the second support plate and the fixed support plate of the present application;

[0026] Figure 3 is a structural schematic view of the limiting nut of the present application;

[0027] Figure 4 is a schematic diagram of a screw member of the present application;

[0028] Figure 5 is a schematic diagram of a positioning wheel device of the present application;

[0029] Figure 6 is a schematic diagram of a working process of a positioning wheel device of the present application;

[0030] Figure 7 is a schematic diagram of shape limitation of a first through hole and a limiting nut of the present application;

[0031] Figure 8 is an exploded structural schematic diagram of a first positioning wheel assembly of the present application;

[0032] Figure 9 is an exploded structural schematic diagram of a second positioning wheel assembly of the present application;

[0033] Figure 10 is an exploded structural schematic diagram of a positioning wheel device of the present application. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0035] As shown in Figures 1 to 7 , the present application provides a preferred embodiment of a positioning wheel device.

[0036] A positioning wheel device, comprising a fixing seat 100, a first positioning wheel assembly 200, a second positioning wheel assembly 300, a limiting nut 500 and a screw member 400; wherein the first positioning wheel assembly 200 comprises a first support plate 210 with a first threaded hole 211, the second positioning wheel assembly 300 comprises a second support plate 310, the fixing seat 100 comprises a fixing support plate 110 arranged 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 and is provided with a second threaded hole 530, and the limiting nut 500 is provided with a first limiting structure 520 to limit the moving stroke of the limiting nut 500; the screw member 400 comprises a first threaded section 401, a non-threaded section 403 and a second threaded section 402, one end of the screw member 400 is rotatably arranged on the second support plate 310, the moving stroke of the limiting nut 500 at least includes the non-threaded section 403 and the second threaded section 402, and the first threaded hole 211 is threadedly connected with the first threaded section 401.

[0037] Specifically, in order to facilitate the description of the positioning wheel device and the description of the limiting nut 500, it is assumed that the first support plate 210 is arranged at the leftmost side, the second support plate 310 is arranged at the rightmost side, and the first limiting structure 520 includes limiting portions arranged at both ends of the limiting nut 500, which are defined as the left limiting portion 521 and the right limiting portion 522, respectively. The body of the limiting nut 500 is arranged in the first through hole 111 of the fixed support plate 110, and the specific position can be adjusted according to the product itself. The above-mentioned orientation limitation is only for the convenience of description and explanation. At the same time, in order to facilitate the rotation of the screw member 400, it is assumed that the clockwise rotation of the screw member 400 makes the first support plate 210 move to the right, and vice versa, the counterclockwise rotation makes the first support plate 210 move to the left. The above-mentioned left and right movement or static state is taken as the reference system of the fixed seat 100. Among them, the first limiting structure 520 can also be other structures, such as concave-convex structure limitation, one is provided with a groove and the other is provided with a boss. Among them, the first threaded section 401, the non-threaded section 403 and the second threaded section 402 are arranged in sequence, which facilitates the regular movement of the first support plate, the limiting nut and the second support plate.

[0038] Regarding the working process of the positioning wheel device, reference is made to Figure 5 and Figure 6 Among them, the above-mentioned Figure 6the screw member 400 is hidden, and the arrows on the components indicate the moving direction in the process from step A to step F. In the initial state A, the limiting nut 500 is at the non-threaded section 403, and the screw member 400 is started to be rotated clockwise, entering step B, so that the first support plate 210 and the second support plate 310 are close to each other. Here, in order to facilitate the description of the actual movement 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 to the right under the rotation of the threaded hole 211 and the screw member 400, and the second support plate 310 is fixed due to the resistance, and at the same time, since the limiting nut 500 is at the non-threaded section 403, the rotation of the screw member 400 does not affect the limiting nut 500, that is, the distance between the limiting nut 500 and the second support plate 310 remains unchanged, and the second support plate 310 can remain in position, and this process continues until the first support plate 210 is in the most extreme position. When the first support plate 210 is in the most extreme position, the first support plate 210 remains unchanged and the screw member 400 continues to be rotated clockwise, entering step C. Since the first support plate 210 remains unchanged, the first resistance generated by the movement of the first positioning wheel assembly 200 is much larger than the second resistance generated by the movement of the second positioning wheel assembly 300, so the second support plate 310 moves to the left and shortens the distance between the second support plate 310 and the limiting nut 500, until the limiting nut 500 is at the second threaded section 402. In the subsequent process, the limiting nut 500 can be at the far right from the initial state (or the limiting nut 500 can be at the far right in step B), or slowly move to the far right in this process. The limiting nut 500 at the far right means that the left limiting portion 521 of the limiting nut 500 is close to the fixed support plate 110. At this time, the limiting nut 500 applies a right force to the second support plate 310 under the threaded connection with the second threaded section 402, and the left limiting portion 521 of the limiting nut 500 is pressed against the fixed support plate 110. This process continues until the second support plate 310 is in the most extreme position. The screw member 400 is rotated 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, 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, and the second support plate 310 is fixed due to the resistance, and the first support plate 210 starts to move to the left, and at the same time, the limiting nut 500 is away from the second support plate 310, and the limiting nut 500 also starts to move to the left, until the right limiting portion 522 of the limiting nut 500 is pressed against the fixed support plate 110, and the first support plate 210 is adjusted back.Continuing to rotate the screw member 400 counterclockwise, steps E and F are entered, since the limiting nut 500 and the second support plate 310 must be away from each other, the limiting nut 500 cannot move to the left again, and only the second support plate 310 can move to the right. In an ideal case, the right moving distance of the second support plate 310 offsets the left moving distance of the first support plate 210, the first support plate 210 remains stationary, or moves slightly to the left or to the right, until the limiting nut 500 returns to the non-threaded section 403, at the same time, the second support plate 310 moves to the far right, and the first support plate 210 can continue to move to the left after the second support plate 310 moves to the far right, or the first support plate 210 moves to the left at the same time as the second support plate 310 moves to the far right, and the first support plate 210 and the second support plate 310 move to the far left and the far right at the same time or in sequence.

[0039] Before counterclockwise rotation of the screw member 400, the first support plate 210 and the second support plate 310 are both in the limit position, i.e. the positioning wheel is in close contact with the external structure, although the positioning wheel device is sufficient for the positioning of the door and window, but it will also cause the positioning wheel to be unable to slide smoothly due to the close contact. Therefore, after starting to rotate the screw member 400 counterclockwise, the left side limiting portion 521 of the limiting nut 500 is first loosened to release the fixed support plate 110, so that the positioning wheel corresponding to the second support plate 310 changes from a tight state to a loose state, and the loose state is relative to the tight state, and the actual position of the positioning wheel does not change or only changes a little; at the same time, since the first support plate 210 starts to move to the left, the positioning wheel corresponding to the first support plate 210 is retracted, i.e. the positioning wheel changes from a tight state to a loose state, achieving simultaneous loosening of positioning in the vertical and horizontal directions, which not only enables the positioning wheel to slide more smoothly, but also does not affect the stability, and in terms of operation, installation and "loosening" can be achieved by one screw member 400, and the structure is simple, which is convenient for improving production efficiency and improving yield.

[0040] By the limiting action of the limiting nut 500 and the fixed support 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 mode of the first support plate 210 and the second support plate 310, the core is that the first support plate 210 can be returned a certain distance before the second support plate 310 is returned to the home position during counterclockwise rotation of the screw member 400.

[0041] In one embodiment, the limiting nut 500 ensures smooth movement during cooperation with the screw member 400. The limiting nut 500 must be prevented from rotating and can only move in the first through hole 111. Therefore, a second limiting structure is arranged between the limiting nut 500 and the first through hole 111 to limit the rotation of the limiting nut 500 relative to the first through hole 111.

[0042] There are many embodiments of the second limiting structure. For example, a mechanical second limiting structure is arranged between the limiting nut 500 and the first through hole 111 or the fixed support plate 110, or an additional part is arranged between the two to prevent the limiting nut 500 from rotating, preferably without affecting the movement of the limiting nut 500. For example, a groove strip is arranged on the outer surface of the limiting nut 500, and a protruding part is arranged on the first through hole 111 to extend into the groove strip.

[0043] However, it is also a feasible solution to use the shapes of the first through hole 111 and the limiting nut 500 as the second limiting structure for limiting. In particular, the interference caused by the movement of the limiting nut 500 is minimized, that is, only the contact area between the two generates frictional resistance. Specifically, referring to Figure 7 , the cross section of the first through hole 111 is a non-circular shape, and the edge of the non-circular shape includes an A point with a farthest distance D1 from a center point and a B point with a closest distance D2 from the center point. The outer contour of the cross section of the limiting nut 500 includes a C point with a farthest distance D3 from the center point, wherein D2 < D3 < D1. As long as the farthest distance D3 of the C point of the limiting nut 500 is between the farthest distance D1 and the closest distance D2, and preferably the center point of the non-circular shape and the center point of the cross section of the limiting nut 500 are collinear, the rotation of the limiting nut 500 in the first through hole 111 will inevitably cause the outer contour to be stuck with the edge of the non-circular shape, and cannot continue to rotate correspondingly.

[0044] Preferably, the cross section of the first through hole 111 is a waist-shaped shape, and the outer contour of the cross section of the limiting nut 500 is also a waist-shaped shape. The size of the outer contour of the cross section of the limiting nut 500 is close to the size of the cross section of the first through hole 111. The waist-shaped shape can have straight lines as side edges and arc lines as upper and lower edges. The waist-shaped shape is simple to manufacture and has uniform stress, which is very low in damage to the first through hole 111 or the limiting nut 500. Moreover, it can ensure that the limiting nut 500 has sufficient internal area to form the second threaded hole 530 and can ensure that the hardness of the second threaded hole 530 meets the requirements. Of course, other shapes can also be used, such as a straight line on one side and arc lines on the remaining three sides, for example, an elliptical shape, a polygonal shape, etc.

[0045] In one embodiment, when the limiting nut 500 is in the non-threaded section 403, the first support plate 210 and the limiting nut 500 are provided with a spring, and the spring is sleeved on the screw member 400. The spring is used to press the limiting nut 500 to the right, especially when the limiting nut 500 is in the non-threaded section 403, the left limiting portion 521 of the limiting nut 500 is close to or abuts against the fixed support plate 110.

[0046] As shown in Figure 1 , Figure 2 , Figures 8 to 10 The present application provides a preferred embodiment of the first positioning wheel assembly 200 and the second positioning wheel assembly 300.

[0047] The first positioning wheel assembly 200 further comprises a first sliding member 220, and the second positioning wheel assembly 300 comprises a second sliding member 320. The first support plate 210 is arranged at one end of the first sliding member 220, and the second support plate 310 is arranged at one end of the second sliding member 320. The first sliding member 220 and the second sliding member 320 are moved along a first direction relative to the fixed seat 100 under the driving of the screw member 400.

[0048] Regarding the first positioning wheel assembly 200, the first positioning wheel assembly 200 further comprises a first adjusting structure. The first sliding member 220 is moved along the first direction relative to the fixed seat 100, and the two first positioning wheels 240 are expanded or retracted on the first plane through the first adjusting structure. The first adjusting structure is connected with the first sliding member 220 and the two first positioning wheels 240 respectively. The first sliding member 220 is moved along the first direction relative to the fixed seat 100 under the driving of the screw member 400. The first adjusting structure can be converted into a movement along a second direction under the driving of the first sliding member 220, and the two first positioning wheels 240 arranged thereon are expanded or retracted on the first plane. Assuming that the fixed seat 100 is horizontally arranged on the side surface, the first direction is the length direction of the fixed seat 100, i.e. the first sliding member 220 is moved along the first direction, and the second direction is a direction perpendicular to the length direction and horizontally arranged, i.e. the two first positioning wheels 240 are expanded or retracted on the left and right sides. Assuming that the base plate is horizontally arranged, the first plane is a horizontal plane.

[0049] Specifically, the first sliding member 220 is arranged on one side of the fixed base 100, the first adjusting structure comprises a horizontal rotating plate 230, two first positioning wheels 240 are arranged on two ends of the horizontal rotating plate 230, the horizontal rotating plate 230 is rotationally arranged on the fixed base 100 through a rotating shaft 250, the first adjusting structure further comprises an arc-shaped channel 221 arranged on one of the first sliding member 220 or the horizontal rotating plate 230, and a guide boss 222 arranged on the other and clamped into the arc-shaped channel 221, movement of the first sliding member 220 in the first direction causes the guide boss 222 to move along the arc-shaped channel 221, thereby driving the horizontal rotating plate 230 to rotate relative to the first sliding member 220, i.e. relative to the fixed base 100, so as to make the two first positioning wheels 240 move left and right. Preferably, the first sliding member 220, the horizontal rotating plate 230 and the fixed base 100 are plate structures, and the horizontal rotating plate 230, the first sliding member 220 and the fixed base 100 are arranged in sequence from top to bottom, the first sliding member 220 is provided with a waist-shaped groove 223, the rotating shaft 250 passes through the waist-shaped groove 223 and is connected with the horizontal rotating plate 230 and the fixed base 100 respectively, and the arc-shaped channel 221 is arranged on the first sliding member 220 and has an arc-shaped track which is curved and inclined along the first direction, and the guide boss 222 is arranged on the horizontal rotating plate 230.

[0050] Of course, the first sliding member 220 and the horizontal rotating plate 230 can be connected in other ways, as long as the force for moving the first sliding member 220 in the first direction can be converted into the force for horizontally rotating the horizontal rotating plate 230, for example, a rack and a gear are arranged between the first sliding member 220 and the horizontal rotating plate 230, and the rack drives the gear to rotate under the driving of the movement in the first direction. Moreover, the first adjusting structure can also be other structures, for example, a diamond-shaped telescopic structure, the two first positioning wheels 240 are arranged on the left and right two end angles of the diamond-shaped telescopic structure, one end angle is fixed on the fixed base 100 in the first direction, the other end angle is connected with the first sliding member 220 in the first direction, and the left and right two end angles are expanded or retracted under the driving of the first sliding member 220.

[0051] Preferably, the first sliding member 220 moves backward relative to the fixed base 100, the first adjusting structure makes the two first positioning wheels 240 expand left and right, and vice versa, the first sliding member 220 moves forward relative to the fixed base 100, the first adjusting structure makes the two first positioning wheels 240 retract left and right.

[0052] With regard to the second positioning wheel assembly 300, the second positioning wheel assembly 300 further comprises a second positioning wheel 331, a guide plate 321, a rotating plate 330, a rotating shaft 340 and a second adjusting structure, the fixed seat 100 comprises a fixed plate 120, the second positioning wheel 331 is arranged on the rotating plate 330, the guide plate 321 is arranged at the other end of the second sliding piece 320, the rotating shaft 340 is arranged through the fixed plate 120, the rotating plate 330 and the guide plate 321, and the second adjusting structure is arranged between the guide plate 321 and the rotating plate 330; wherein the guide plate 321 is driven by the screw piece 400 to move along the first direction relative to the fixed seat 100, and the rotating plate 330 is driven by the second adjusting structure to rotate on the second plane, so that the second positioning wheel 331 moves away from or approaches the fixed seat 100 on the second plane.

[0053] In one embodiment, the guide plate 321 is arranged on the second sliding piece 320, and the second sliding piece 320 is driven by the screw piece 400 to move along the first direction relative to the fixed seat 100. Wherein, assuming that the fixed seat 100 is horizontally arranged on the side surface, the first direction is the length direction of the fixed seat 100, that is, the second sliding piece 320 moves along the first direction, and the third direction is the direction perpendicular to the length direction and arranged vertically, that is, the second positioning wheel 331 moves vertically.

[0054] The guide plate 321 comprises a first waist-shaped hole 3211 arranged along the sliding direction of the second sliding piece 320, and the rotating shaft 340 is arranged through the first waist-shaped hole 3211. The second adjusting structure comprises a guide protrusion arranged on one of the guide plate 321 or the rotating plate 330, and a second waist-shaped hole arranged on the other and arranged obliquely, the guide protrusion is slidingly arranged in the second waist-shaped hole, and the rotating plate 330 is arranged to rotate relative to the fixed plate 120 through the second adjusting structure. During the movement of the second sliding piece 320 along the first direction, the guide plate 321 and the rotating plate 330 are arranged to rotate relative to the fixed plate 120 through the cooperation of the guide protrusion and the second waist-shaped hole, that is, to drive the second positioning wheel 331 to move vertically.

[0055] There are two cases of the positional relationship of the fixed plate 120, the rotating plate 330 and the guide plate 321, that is, the fixed plate 120, the rotating plate 330 and the guide plate 321 are arranged in sequence, and the fixed plate 120, the guide plate 321 and the rotating plate 330 are arranged in sequence. The core is that the fixed plate 120 must be used as the support plate of the rotating shaft 340, and the rotating plate 330 and the guide plate 321 are close to each other to realize the movement turning, that is, to turn the movement state of the first direction into the movement state of the third direction. Preferably, the second sliding piece 320 moves forward relative to the fixed seat 100, the second adjusting structure drives the second positioning wheel 331 to rise, and vice versa, the second sliding piece 320 moves backward relative to the fixed seat 100, and the second adjusting structure drives the second positioning wheel 331 to descend.

[0056] In another embodiment, 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, and the second positioning wheel assembly 300 is provided with a resistance structure itself or between the second positioning wheel assembly 300 and the fixed seat 100, which is equivalent to the second resistance. In order to improve the assembly stability and rationality of the positioning wheel device, in actual application, the left and right positioning is first performed through the first positioning wheel assembly 200, that is, the two first positioning wheels 240 are controlled to expand to the maximum stroke, and then the up and down positioning is performed through the second positioning wheel assembly 300, that is, the second positioning wheel 331 is controlled to rise to the maximum stroke, so as to realize positioning. The positioning wheel device is installed in various door and window structures, preferably a sliding door and window structure, and the fixed seat 100 is preferably arranged in the channel of the door and window structure and is limited in the channel of the door and window frame through the first positioning wheel 240 and the second positioning wheel 331. The channel of the door and window structure is connected with the channel of the door and window frame, and moves under the cooperation of the two channels.

[0057] At the same time, cooperating with the limiting nut 500, after the above assembly is completed, the screw member 400 can be continuously rotated in the reverse direction to return the first supporting plate 210, that is, to control the two first positioning wheels 240 to recover a certain stroke to the left and right, so as to avoid the two first positioning wheels 240 from being stuck in the channel due to the expansion to the left and right, thereby reducing the sliding ability of the first positioning wheel 240.

[0058] In another embodiment, the first sliding member 220 and the second sliding member 320 are respectively arranged on the two side surfaces of the fixed seat 100, and the first supporting plate 210 and the second supporting plate 310 are vertically arranged on the same side relative to the fixed seat 100; and the end of the second supporting plate 310 is a U-shaped clamping structure, the screw cap of the screw member 400 abuts against the second supporting plate 310 and passes through the second through hole 311 on the second supporting plate 310, and the rod part is clamped in the U-shaped mouth of the U-shaped clamping structure. The first sliding member 220 and the second sliding member 320 are respectively arranged on the two side surfaces of the fixed seat 100, and can be arranged on the fixed seat 100 and can be independently moved without being affected, which improves the overall stability, and in order to facilitate the screw member 400 to pass through the first through hole 111 of the second supporting plate 310 and the first threaded hole 211 of the first supporting plate 210, the first supporting plate 210 and the second supporting plate 310 are vertically arranged on the same side relative to the fixed seat 100, which can provide a bending structure, or a notch is formed in the fixed seat 100, so that the first supporting plate 210 and the second supporting plate 310 are arranged on the same side. Preferably, the first sliding member 220 is arranged on the upper side surface of the fixed seat 100, the second sliding member 320 is arranged on the lower side surface, the fixed seat 100 is provided with a notch, and the second supporting plate 310 passes through the notch and is arranged on the upper side surface.

[0059] Of course, the screw member 400 also includes a nut and a card fixed on the screw rod, the second support plate 310 is arranged between the nut and the card, and the screw rod is limitedly connected with the second through hole 311 of the second support plate 310 through the nut and the card. The card is preferably a U-shaped clamping structure, which is convenient to install and stable.

[0060] The above is only the best embodiment of the present application, not for limiting the scope of the present application, any equivalent changes or modifications made in the scope of the present application are covered by the present application.

Claims

1. A positioning wheel arrangement, characterized by: The positioning wheel device comprises a fixing base, a first positioning wheel assembly, a second positioning wheel assembly, a limiting nut and a screw member, 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, and the fixing base comprises a fixing supporting plate arranged between the first supporting plate and the second supporting plate, and the fixing supporting plate is provided with a first through hole; The limiting nut is movably arranged in the first through hole and is provided with a second threaded hole, and the limiting nut is provided with a first limiting structure to limit the movement stroke of the limiting nut; The screw member comprises a first threaded section, a non-threaded section and a second threaded section, one end of the screw member is rotatably arranged on the second supporting plate, the movement stroke of the limiting nut at least comprises the non-threaded section and the second threaded section, and the first threaded hole is threadedly connected with the first threaded section; The first limiting structure comprises limiting portions arranged at both ends of the limiting nut.

2. The positioning wheel arrangement of claim 1, characterized in that: A second limiting structure is arranged between the limiting nut and the first through hole to limit the rotation of the limiting nut relative to the first through hole.

3. The positioning wheel apparatus of claim 1, wherein: The first through hole has a non-circular cross section, and the edge of the non-circular shape comprises an A point with a distance D1 farthest from a center point and a B point with a distance D2 closest to the center point, and the outer contour of the cross section of the limiting nut comprises a C point with a distance D3 farthest from the center point, wherein D2 < D3 < D1.

4. The positioning wheel apparatus of claim 1, wherein: The first through hole has a waist-shaped cross section, and the outer contour of the cross section of the limiting nut also has a waist shape, and the size of the outer contour of the cross section of the limiting nut is close to the size of the cross section of the first through hole.

5. The positioning wheel apparatus of claim 1, wherein: A spring is arranged between the first supporting plate and the limiting nut, and the spring is sleeved on the screw member.

6. The positioning wheel arrangement according to any one of claims 1 to 5, characterized in that: The first resistance generated by the movement of the first positioning wheel assembly is smaller than the second resistance generated by the movement of the second positioning wheel assembly.

7. The positioning wheel apparatus of claim 1, wherein: The first positioning wheel assembly further comprises a first sliding member, the second positioning wheel assembly comprises a second sliding member, the first supporting plate is arranged at one end of the first sliding member, the second supporting plate is arranged at one end of the second sliding member, and the first sliding member and the second sliding member are moved relative to the fixing base along a first direction under the driving of the screw member.

8. The positioning wheel arrangement of claim 7, characterized in that: The second positioning wheel assembly further comprises a second positioning wheel, a guide plate, a rotating plate, a rotating shaft and a second adjusting structure, the fixing base comprises a fixing plate, the second positioning wheel is arranged on the rotating plate, the guide plate is arranged at the other end of the second sliding member, the rotating shaft is arranged through the fixing 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 moved relative to the fixing base along the first direction under the driving of the screw member, and the rotating plate is rotated on a second plane under the driving of the second adjusting structure, so that the second positioning wheel is away from or close to the fixing base on the second plane.

9. The positioning wheel arrangement of claim 8, characterized in that: The guide plate comprises a first waist-shaped hole arranged along the sliding direction of the second sliding member, and the rotating shaft is arranged through the first waist-shaped hole; the second adjusting structure comprises a guide protrusion arranged on one of the guide plate or the rotating plate, and a second waist-shaped hole arranged on the other and arranged obliquely, the guide protrusion is arranged slidingly in the second waist-shaped hole, and the rotating plate is arranged rotatably relative to the fixed plate through the second adjusting structure.

10. The positioning wheel apparatus of claim 7, 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 member moves relative to the fixed seat along the first direction, and the two first positioning wheels are expanded or retracted on the first plane through the first adjusting structure.

11. The positioning wheel apparatus of claim 10, wherein: The first adjusting structure comprises a horizontal rotating plate and a rotating shaft, the first positioning wheels are arranged at two ends of the horizontal rotating plate, the horizontal rotating plate is arranged rotatably with the fixed seat through the rotating shaft, the first adjusting structure further comprises an arc-shaped channel arranged on one of the first sliding member or the horizontal rotating plate, and a guide boss arranged on the other and clamped into the arc-shaped channel, the movement of the first sliding member along the first direction causes the guide boss to move along the arc-shaped channel, thereby driving the horizontal rotating plate to rotate relative to the first sliding member.

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