Positioning wheel device

Abstract

The present invention relates to the technical field of daily hardware accessories, and specifically to a positioning wheel device. A limiting mechanism is arranged between the second sliding member and the fixed seat, between the second adjustment structure and the fixed seat, or between the second sliding member and the second adjustment structure; in the process of the driving member driving the second sliding member to move relative to the fixed seat along the first direction, the second sliding member is fixed under the limitation of the limiting mechanism; and when the driving member drives the first sliding member to move relative to the fixed seat to the maximum stroke, the driving member drives the second sliding member to break through the limitation of the limiting mechanism and continue to move. The beneficial effect of the present invention is that, compared with the prior art, when the driving member drives the first sliding member to move relative to the fixed seat to the maximum stroke, the driving member drives the second sliding member to break through the limitation of the limiting mechanism and continue to move, and the limiting mechanism can be used to realize the successive movement of the first sliding member and the second sliding member, thereby realizing positioning.

Description

Technical Field

[0001] The invention relates to the technical field of daily hardware accessories, and in particular to a positioning wheel device. Background Art

[0002] The door and window positioning wheel adjustment device is used to be installed on a sliding window or sliding door, and cooperates with the corresponding assembled track structure to prevent the window or sliding door from swinging, or being easily lifted and detached by external force; the door and window positioning wheel adjustment device is preferably arranged at the upper end surface of the sliding window or sliding door.

[0003] The existing door and window positioning wheel adjustment device mainly sets two driving mechanisms to drive the anti-sway mechanism and the lifting mechanism in turn to prevent the window or sliding door from swinging and preventing the window or sliding door from falling off the track. It is large in size (high in height) and it is inconvenient to adjust the driving mechanism.

[0004] There is also a method of adjusting the anti-sway mechanism and the lifting mechanism at the same time to prevent the window or sliding door from swinging, but the simultaneous adjustment and positioning effect is not good, and the positioning is inaccurate and the position does not correspond. In addition, the structure is complicated, which is not conducive to production and manufacturing.

[0005] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a positioning wheel device in view of the above-mentioned defects of the prior art, so as to solve the problems that the existing door and window positioning wheel adjustment device is inconvenient to adjust the driving mechanism, and the adjustment and positioning effect is not good, the positioning is inaccurate and the position does not correspond, and the structure is complicated.

[0007] The technical solution adopted by the present invention to solve its technical problem is: to provide a positioning wheel device, the positioning wheel device includes a fixed seat, a first positioning wheel assembly, a second positioning wheel assembly and a driving member, the first positioning wheel assembly includes two first positioning wheels that are expanded or retracted on a first plane, the second positioning wheel assembly includes a second sliding member, a second adjustment structure and a second positioning wheel, the second sliding member moves along a first direction relative to the fixed seat, and the second positioning wheel is moved away from or close to the fixed seat on the second plane through the second adjustment structure, and the driving member is connected to the first positioning wheel assembly and the second sliding member respectively; wherein,

[0008] A limiting mechanism is provided between the second sliding member and the fixing seat, between the second adjusting structure and the fixing seat, or between the second sliding member and the second adjusting structure;

[0009] When the driving member drives the second sliding member to move along the first direction relative to the fixed seat, the second sliding member is fixed under the limit of the limiting mechanism; and when the driving member drives the first positioning wheel assembly and makes the first positioning wheel expand to the extreme position, the driving member drives the second sliding member to break through the limit of the limiting mechanism and continue to move.

[0010] Among them, the preferred solution is: the first positioning wheel assembly also includes a first sliding member and a first adjusting structure, the first sliding member moves along the first direction relative to the fixed seat, and the first adjusting structure enables the two first positioning wheels to be expanded or retracted on the first plane, the driving member is a screw member, the threaded section of the screw member is threadedly connected to one of the first sliding member and the second sliding member, and the screw member is also limited by the other of the first sliding member and the second sliding member to drive the first sliding member and the second sliding member to move along the first direction relative to the fixed seat during the screwing process.

[0011] Among them, the preferred solution is: the first sliding member includes a first support plate with a threaded hole, the second sliding member includes a second support plate with a through hole, the screw member is arranged to pass through the through hole of the second support plate and the threaded hole of the first support plate, its screw rod is limitedly connected to the through hole of the second support plate, and its threaded section is threadedly connected to the threaded hole.

[0012] Among them, the preferred solution is: the first sliding member and the second sliding member are respectively arranged on the two side surfaces of the fixed seat, the first support plate and the second support plate are both vertically arranged on the same side relative to the fixed seat; and the end of the second support plate is a U-shaped clamping structure, and the screw is clamped in the U-shaped mouth of the U-shaped clamping structure.

[0013] Among them, a preferred solution is: the fixing seat also includes a third support plate arranged between the first support plate and the second support plate, a spring is arranged between the second support plate and the third support plate, and the screw is inserted into the spring and passes through the third support plate.

[0014] Among them, a preferred solution is: the limiting mechanism is arranged between the second sliding member and the fixing seat, between the second adjustment structure and the fixing seat, or between the second sliding member and the second adjustment structure; wherein,

[0015] The limiting mechanism includes a guiding structure arranged on one, a moving structure arranged on the other, and a limiting structure arranged on the travel of the guiding structure. The moving structure moves along the guiding structure and is blocked and limited at the limiting structure. The moving structure breaks through the limit of the limiting structure under the drive of the driving member and continues to move along the guiding structure.

[0016] Among them, a preferred solution is that the guiding structure is a long opening, the moving structure is a protruding portion that is inserted into the long opening and moves, and the limiting structure is a stopper that is arranged on the long opening and extends inward.

[0017] Among them, a preferred solution is that the width of the channel formed by the block is slightly smaller than the width of the protruding portion.

[0018] Among them, the preferred solution is: the second adjustment structure includes a guide plate arranged on the second sliding member, a rotating plate arranged on the second positioning wheel, and a rotating shaft, the fixed seat includes a fixed plate, and the fixed plate, the guide plate and the rotating plate are sequentially arranged in abutment with each other through the rotating shaft, the guide plate includes 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 guide plate also includes a guide protrusion, the rotating plate includes a second waist-shaped hole arranged obliquely, the guide protrusion is slidably arranged in the second waist-shaped hole, and the rotating plate is rotatably arranged relative to the fixed plate through the rotating shaft; wherein,

[0019] The limiting mechanism is a limiting structure arranged in the first waist-shaped hole or the second waist-shaped hole.

[0020] Among them, the preferred solution is: the limiting mechanism is a limiting structure arranged in the first waist-shaped hole, and the limiting structure includes a stopper arranged in the first waist-shaped hole and extending inward, and the width of the channel formed by the stopper is slightly smaller than the width of the guide protrusion.

[0021] Among them, the preferred solution is: the first sliding member and the second sliding member are respectively arranged on the two side surfaces of the fixed seat, the guide plate passes through the fixed seat and is arranged on a side surface on the same side as the second sliding member, and the second positioning wheel is arranged at the end of the rotating plate and moves up and down driven by the rotation of the rotating plate.

[0022] The beneficial effect of the present invention lies in that, compared with the prior art, when the driving member drives the first sliding member to move to the maximum stroke relative to the fixed seat, the driving member drives the second sliding member to break through the limit of the limiting mechanism and continue to move. The limiting mechanism can be used to realize the successive movement of the first sliding member and the second sliding member, thereby realizing left and right positioning and up and down positioning. The structure is simple, more stable and efficient, and the manufacturing process is simple, easy to assemble, and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0024] Figure 1 It is a front perspective structural schematic diagram of the positioning wheel device of the present invention;

[0025] Figure 2 It is a schematic diagram of the back three-dimensional structure of the positioning wheel device of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the driving member of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the positioning wheel device of the present invention in an expanded state;

[0028] Figure 5 It is a schematic diagram of the exploded structure of the first positioning wheel assembly of the present invention;

[0029] Figure 6 It is a schematic diagram of the exploded structure of the second positioning wheel assembly of the present invention;

[0030] Figure 7 It is a schematic diagram of the structural limiting mechanism of the present invention;

[0031] Figure 8 It is a schematic diagram of the exploded structure of the positioning wheel device of the present invention. DETAILED DESCRIPTION

[0032] Now, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0033] like Figures 1 to 8 As shown, the present invention provides a preferred embodiment of the positioning wheel device.

[0034] A positioning wheel device, the positioning wheel device includes a fixed seat 100, a first positioning wheel assembly 200, a second positioning wheel assembly 300 and a driving member 400, the first positioning wheel assembly 200 includes two first positioning wheels 230 that are expanded or retracted on a first plane, the second positioning wheel assembly 300 includes a second sliding member 310, a second adjustment structure 320 and a second positioning wheel 330, the second sliding member 310 moves along a first direction relative to the fixed seat 100 and the second positioning wheel 330 is moved away from or close to the fixed seat on a second plane through the second adjustment structure 320, and the driving member 400 is respectively connected to the first sliding member 210 and the second sliding member 310. Among them, a limiting mechanism 500 is set between the second sliding member 310 and the fixed seat 100, between the second adjustment structure 320 and the fixed seat 100, or between the second sliding member 310 and the second adjustment structure 320; when the driving member 400 drives the second sliding member 310 to move along the first direction relative to the fixed seat 100, the second sliding member 310 is fixed under the limitation of the limiting mechanism 500; and, when the driving member 400 drives the first positioning wheel assembly 200 and makes the first positioning wheel 230 expand to the extreme position, the driving member 400 drives the second sliding member 310 to break through the limitation of the limiting mechanism 500 and continue to move.

[0035] In this embodiment, and with reference to Figure 5 and Figure 8Regarding the first positioning wheel assembly 200, the first positioning wheel assembly 200 includes a first sliding member 210 and a first adjusting structure 220. The first sliding member 210 moves relative to the fixed seat 100 along the first direction, and the first adjusting structure 220 enables the two first positioning wheels 230 to be respectively expanded or retracted on the first plane. When the driving member 400 drives the first sliding member 210 to move relative to the fixed seat 100 to the maximum stroke, the driving member 400 drives the second sliding member 310 to break through the limit of the limit mechanism 500 and continue to move. The first adjusting structure 220 is respectively connected to the first sliding member 210 and the two first positioning wheels 230. The first sliding member 210 moves relative to the fixed seat 100 along the first direction x1 under the drive of the driving member 400, and the first adjusting structure 220 can be driven by the first sliding member 210 to be converted into a movement in the second direction x2, and drives the two first positioning wheels 230 arranged thereon to be expanded or retracted on the first plane. It is assumed that the fixing seat 100 is fixed horizontally on the side, the first direction is the length direction of the fixing seat 100, that is, the first sliding member 210 moves along the first direction, and the second direction is a direction perpendicular to the length direction and horizontally arranged, that is, the two first positioning wheels 230 move left and right. It is assumed that the substrate is placed horizontally, and the first plane is a horizontal plane.

[0036] Specifically, the first sliding member 210 is arranged on a side surface of the fixed seat 100, the first adjusting structure 220 includes a horizontal rotating plate 322, and the first positioning wheels 230 are arranged at both ends of the horizontal rotating plate 322. The horizontal rotating plate 322 is rotatably arranged with the fixed seat 100 through a rotating shaft. The first adjusting structure 220 also includes an arc-shaped channel 221 arranged on one of the first sliding member 210 or the horizontal rotating plate 322, and a guide boss 222 arranged on the other and inserted into the arc-shaped channel 221. The movement of the first sliding member 210 along the first direction causes the guide boss 222 to move along the arc-shaped channel 221, thereby driving the horizontal rotating plate 322 to rotate relative to the first sliding member 210, that is, to rotate relative to the fixed seat 100, so that the two first positioning wheels 230 can be extended and retracted and moved left and right. Preferably, the first sliding member 210, the horizontal rotating plate 322 and the fixed seat 100 are plate structures, and the horizontal rotating plate 322, the first sliding member 210 and the fixed seat 100 are stacked in sequence up and down, the first sliding member 210 is provided with a waist-shaped groove, the rotating shaft passes through the waist-shaped groove and is respectively connected to the horizontal rotating plate 322 and the fixed seat 100, the arc channel 221 is provided on the first sliding member 210 and the arc track is inclined and bent along the first direction, and the guide boss 222 is provided on the horizontal rotating plate 322.

[0037] Of course, there can be other ways to connect the first sliding member 210 and the horizontal rotating plate 322, as long as the force of the first sliding member 210 moving in the first direction can be converted into the force of the horizontal rotating plate 322 to rotate horizontally, such as a rack and a gear are arranged between the first sliding member 210 and the horizontal rotating plate 322, and the gear is driven to rotate when the rack moves in the first direction. In addition, the first adjustment structure 220 can also be other structures, such as a prismatic telescopic structure, the first positioning wheel 230 is arranged at the left and right end corners of the prismatic telescopic structure, one end corner along the first direction is fixed on the fixed seat 100, and the other end corner along the first direction is connected to the first sliding member 210, and the left and right end corners are opened or retracted under the drive of the first sliding member 210.

[0038] Preferably, the first sliding member 210 moves backward relative to the fixing seat 100, and the first adjusting structure 220 causes the two first positioning wheels 230 to expand left and right. Conversely, the first sliding member 210 moves forward relative to the fixing seat 100, and the first adjusting structure 220 causes the two first positioning wheels 230 to retract left and right.

[0039] In this embodiment, reference Figure 6 and Figure 8 Regarding the second positioning wheel assembly 300, the second adjustment structure 320 is connected to the second positioning wheel 330 and the second sliding member 310 respectively. The second sliding member 310 moves along the first direction relative to the fixed seat 100 under the drive of the driving member 400, and the second adjustment structure 320 can be converted into a movement in the third direction under the drive of the second sliding member 310, and drive the second positioning wheel 330 disposed thereon to move up and down. It is assumed that the fixed seat 100 is fixedly arranged horizontally on the side, the first direction is the length direction of the fixed seat 100, that is, the second sliding member 310 moves along the first direction, and the third direction is a direction perpendicular to the length direction and arranged vertically, that is, the second positioning wheel 330 moves up and down.

[0040] Specifically, the second sliding member 310 is arranged on the other side of the fixed seat 100, the second adjustment structure 320 includes a guide plate arranged on the second sliding member 310, a rotating plate 322 arranged on the second positioning wheel 330, and a rotating shaft 340, the fixed seat 100 includes a fixed plate 110, the fixed plate 110, the guide plate and the rotating plate 322 are sequentially arranged in abutment with each other through the rotating shaft 340, the guide plate includes a first waist-shaped hole 321 arranged along the sliding direction of the second sliding member 310, the rotating shaft 340 is arranged through the first waist-shaped hole 321, the guide plate also includes a guide protrusion (that is, the rotating shaft 340), the rotating plate 322 includes a second waist-shaped hole arranged obliquely, the guide protrusion is slidably arranged in the second waist-shaped hole, and the rotating plate 322 is rotatably arranged relative to the fixed plate 110 through the rotating shaft 340. When the second sliding member 310 moves along the first direction, the guide plate and the rotating plate 322 cooperate with the guide protrusion and the second waist-shaped hole to realize the vertical flipping of the rotating plate 322 relative to the fixed plate 110, that is, driving the second positioning wheel 330 to move up and down.

[0041] Preferably, the second sliding member 310 moves forward relative to the fixing seat 100, and the second adjusting structure 320 makes the second positioning wheel 330 rise. Conversely, the second sliding member 310 moves backward relative to the fixing seat 100, and the second adjusting structure 320 makes the second positioning wheel 330 fall.

[0042] In this embodiment, and with reference to Figures 6 to 8 Regarding the limiting mechanism 500, if the limiting mechanism 500 is not set, the driving member 400 will drive the second sliding member 310 and the first sliding member 210 to move simultaneously or successively according to the resistance conditions of the second adjusting structure 320 and the first adjusting structure 220. In order to improve the assembly stability and rationality of the positioning wheel device, in actual application, it is necessary to first perform left and right positioning through the first positioning wheel assembly 200, that is, control the two first positioning wheels 230 to expand to the maximum stroke left and right, and then perform up and down positioning through the second positioning wheel assembly 300, that is, control the second positioning wheel 330 to rise to the maximum stroke to achieve positioning, wherein the positioning wheel device is installed in various door and window structures, preferably a sliding door and window structure, and the fixing seat 100 is preferably set in the groove of the door and window structure, and the first positioning wheel 230 and the second positioning wheel 330 are limited to the groove of the door and window frame, and the groove of the door and window structure will be connected with the groove of the door and window frame and move with the cooperation of the two grooves.

[0043] Therefore, a limiting mechanism 500 is provided between the second sliding member 310 and the fixed seat 100, between the second adjusting structure 320 and the fixed seat 100, or between the second sliding member 310 and the second adjusting structure 320. In essence, the limiting mechanism 500 is used to limit the movement of the second positioning wheel assembly 300 in terms of travel to form a movement resistance. The first positioning wheel assembly 200 with a smaller resistance is operated first to perform left and right positioning until the first positioning wheel assembly 200 reaches the maximum travel and forms a greater movement resistance. The driving member 400 then controls the second positioning wheel assembly 300 to operate, breaking through the limit of the limiting mechanism 500 to achieve up and down positioning until the second positioning wheel assembly 300 reaches the maximum travel. Therefore, when the driving member 400 drives the first sliding block and the second sliding member 310 to move relative to the fixed seat 100 along the first direction, the second sliding member 310 is fixed under the limit of the limiting mechanism 500, and only drives the first sliding block to move; and, when the driving member 400 drives the first sliding member 210 to move to the maximum stroke relative to the fixed seat 100, the first sliding block is fixed, and the driving member 400 drives the second sliding member 310 to break through the limit of the limiting mechanism 500 and continue to move.

[0044] like Figures 1 to 4 As shown, the present invention provides a preferred embodiment of the driving member 400.

[0045] The driving member 400 is a screw member, the threaded section of which is threadedly connected to one of the first sliding member 210 and the second sliding member 310, and the screw member is also limitedly arranged with the other of the first sliding member 210 and the second sliding member 310, so as to drive the first sliding member 210 and the second sliding member 310 to move along the first direction relative to the fixing seat 100 during the screwing process. The limited arrangement means that the screw member can rotate relative to the first sliding member 210 or the second sliding member 310, but cannot move relatively along the first direction, and can also move within a certain area with limitation, and can also rotate at the same time.

[0046] Specifically, assuming that the threaded section of the screw member is threadedly connected to the first sliding member 210, and the screw member is also limited by the second sliding member 310, two situations may occur during the screwing process. When the movement resistance of the first sliding member 210 is greater than the movement resistance of the second sliding member 310, the first sliding member 210 is fixed, and the screw member drives the second sliding member 310 to approach the first sliding member 210 or move away from the first sliding member 210; and, when the movement resistance of the first sliding member 210 is less than the movement resistance of the second sliding member 310, the second sliding member 310 is fixed, and the screw member drives the first sliding member 210 to move forward to approach the first sliding member 210 or move away from the first sliding member 210.

[0047] Among them, the first sliding member 210 includes a first support plate 211 with a threaded hole, the second sliding member 310 includes a second support plate 311 with a through hole, the screw member is set through the through hole of the second support plate 311 and the threaded hole of the first support plate 211, the screw rod of the screw member is limitedly connected to the through hole of the second support plate 311, and the threaded section of the screw member is threadedly connected to the threaded hole. Preferably, the screw member is turned in the first rotation direction, driving the first support plate 211 and the second support plate 311 to approach each other, thereby driving the first sliding member 210 to move backward and the second sliding member 310 to move forward, the first adjusting structure 220 causes the two first positioning wheels 230 to expand left and right, and the second adjusting structure 320 causes the second positioning wheel 330 to rise; and the screw member is turned in the second rotation direction, driving the first support plate 211 and the second support plate 311 to move away from each other, thereby driving the first sliding member 210 to move forward and the second sliding member 310 to move backward, the first adjusting structure 220 causes the two first positioning wheels 230 to retract left and right, and the second adjusting structure 320 causes the second positioning wheel 330 to drop.

[0048] In this embodiment, the first sliding member 210 and the second sliding member 310 are respectively arranged on two side surfaces of the fixing base 100, and the first support plate 211 and the second support plate 311 are both vertically arranged on the same side relative to the fixing base 100; and, the end of the second support plate 311 is a U-shaped clamping structure, the screw nut of the screw member rests on the second support plate 311, and its rod portion is clamped in the U-shaped mouth of the U-shaped clamping structure. The first sliding member 210 and the second sliding member 310 are respectively arranged on two side surfaces of the fixing seat 100, so that the first sliding member 210 and the second sliding member 310 can be arranged close to the fixing seat 100 and can move independently without being affected, while improving the overall stability. In addition, in order to facilitate the screw to pass through the through hole of the second support plate 311 and the threaded hole of the first support plate 211, the first support plate 211 and the second support plate 311 need to be vertically arranged on the same side relative to the fixing seat 100, and a bending structure can be provided, or a notch can be opened in the fixing seat 100 so that the first support plate 211 and the second support plate 311 are arranged on the same side. Preferably, the first sliding member 210 is arranged on the upper side surface of the fixing seat 100, the second sliding member 310 is arranged on the lower side surface, the fixing seat 100 opens a notch, and the second support plate 311 passes through the notch and is arranged on the upper side surface.

[0049] Preferably, reference Figure 3The fixing seat 100 further includes a third support plate 120 disposed between the first support plate 211 and the second support plate 311, a spring (not shown) is disposed between the second support plate 311 and the third support plate 120, and the screw member is disposed in the spring and through the third support plate 120. Preferably, one end of the spring abuts against the end surface of the second support plate 311, and the other end abuts against the end surface of the third support plate 120, and through the elastic resistance of the spring, the screw member is subjected to resistance to forward movement when rotating, and the first support plate 211 is first moved close to the third support plate 120, until the first support plate 211 moves to the maximum stroke, and the second support plate 311 is moved close to the third support plate 120 by bearing the elastic resistance of the spring.

[0050] like Figures 6 to 8 As shown, the present invention provides a preferred embodiment of the limiting mechanism 500.

[0051] The limiting mechanism 500 is disposed between the second sliding member 310 and the fixing seat 100, between the second adjusting structure 320 and the fixing seat 100, or between the second sliding member 310 and the second adjusting structure 320. Specifically, the limiting mechanism 500 essentially limits the movement of the second sliding member 310 by providing sufficient movement resistance between the second positioning wheel assembly 300 and the fixing seat 100, so that the driving member 400 can first drive the first sliding member 210 to move so that the two first positioning wheels 230 are spread out left and right, and then drive the second sliding member 310 to move so that the second positioning wheel 330 rises. Therefore, the limiting mechanism 500 can be arranged between the second sliding member 310 and the fixed seat 100 to provide sufficient resistance between the second sliding member 310 and the fixed seat 100 to limit the movement of the second sliding member 310; the limiting mechanism 500 can also be arranged between the lower adjustment structure and the fixed seat 100, so as to limit the movement of the lower adjustment structure relative to the fixed seat 100, so as to limit the movement of the second sliding member 310; the limiting mechanism 500 can also be arranged between the second sliding member 310 and the second adjustment structure 320, so as to limit the movement of the second adjustment structure 320 relative to the second sliding member 310 seat, so as to limit the movement of the second sliding member 310.

[0052] In this embodiment, the limiting mechanism 500 includes a guide structure provided on one, a moving structure provided on the other, and a limiting structure provided on the travel of the guide structure. The moving structure moves along the guide structure and is blocked and limited at the limiting structure. The moving structure breaks through the limit of the limiting structure and continues to move along the guide structure under the drive of the driving member 400. Specifically, in normal movement, the moving structure moves along the track of the guide structure, thereby realizing the mutual movement of various components, such as linear movement or curved rotation. The limiting structure is provided on the guide structure, which is essentially to block and limit the moving structure along the track of the guide structure during the moving structure. However, when the force of the moving structure moving forward is large enough, it can break through the blocking limit of the limiting structure and continue to move along the track of the guide structure.

[0053] Preferably, the guide structure is a long opening, the moving structure is a protrusion that is inserted into the long opening and moves, and the limiting structure is a stopper that is arranged on the long opening and extends inward. If both sides of the long opening are provided with stops, the width of the channel formed by the stops is slightly smaller than the width of the protrusion, and the protrusion is not hindered when moving along other positions of the long opening. When it moves to the stopper, it cannot pass directly due to the width, and a greater thrust is required to make the protrusion break through the restriction.

[0054] In this embodiment, the limiting mechanism 500 is a limiting structure arranged in the first waist-shaped hole 321 or the second waist-shaped hole. Specifically, the limiting mechanism 500 is a limiting structure arranged in the first waist-shaped hole 321, and the limiting structure includes a stopper arranged on the first waist-shaped hole 321 and extending inward, and the width of the channel formed by the stopper is slightly smaller than the width of the guide protrusion. Of course, relatively speaking, it is more appropriate to be arranged in the first waist-shaped hole 321, because the first waist-shaped hole 321 is a straight waist-shaped hole, and the movement is relatively stable, while the second waist-shaped hole is a curved waist-shaped hole, which is easy to get stuck when turning, but it is also an implementation method.

[0055] Preferably, the first sliding member 210 and the second sliding member 310 are respectively arranged on two side surfaces of the fixed base 100, the guide plate passes through the fixed base 100 and is arranged on a side surface on the same side as the second sliding member 310, and the second positioning wheel 330 is arranged at the end of the rotating plate 322, and moves up and down driven by the rotation of the rotating plate 322.

[0056] In the present invention, an operation flow of a positioning wheel device is provided. First, the positioning wheel device is in an initial state, that is, the second sliding member 310 is at the front end of the movement stroke along the first direction, and the first sliding member 210 is at the rear end of the movement stroke along the first direction. The first adjusting structure 220 retracts the two first positioning wheels 230 to the left and right, and the second adjusting structure 320 lowers the second positioning wheel 330. By screwing the screw, the second support plate 311 of the second sliding member 310 and the first support plate 211 of the first sliding member 210 are moved close to each other. When the guide plate as a guide protrusion is clamped in the limiting structure in the first waist-shaped hole 321, the guide plate 311 is moved. The first support plate 211 moves toward the second slide 310, and the first adjustment structure 220 gradually expands the two first positioning wheels 230 to the left and right until the first positioning wheels 230 gradually expand to the left and right and press against the limit, that is, move to the maximum movement stroke of the first slide 210; the second support plate 311 is driven to move closer to the first support plate 211, and is limited by an external force greater than the limit structure, so that the second slide 310 moves forward after breaking through the limit, and the second adjustment structure 320 makes the second positioning wheel 330 rise and press against the limit to complete the operation. The press against the limit includes its own limit or press against the external structure and cannot continue to expand or rise.

[0057] The above is only the best embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made according to the scope of the patent application of the present invention are covered by the present invention.

Claims

1. A positioning wheel device, characterized in that: The positioning wheel device comprises a fixed seat, a first positioning wheel assembly, a second positioning wheel assembly and a driving member, wherein the first positioning wheel assembly comprises two first positioning wheels that are extended or retracted on a first sliding member and a first plane, and the second positioning wheel assembly comprises a second sliding member, a second adjustment structure and a second positioning wheel, the second sliding member moves along a first direction relative to the fixed seat, and the second positioning wheel is moved away from or close to the fixed seat on the second plane through the second adjustment structure, and the driving member is connected to the first positioning wheel assembly and the second sliding member respectively; wherein, A limiting mechanism is provided between the second sliding member and the fixed seat, between the second adjustment structure and the fixed seat, or between the second sliding member and the second adjustment structure, the limiting mechanism comprising a guide structure provided on one, a moving structure provided on the other, and a limiting structure provided on the travel of the guiding structure, the guiding structure is a long opening, the moving structure is a protruding portion inserted into the long opening for movement, the limiting structure is a stopper provided on the long opening and extending inwardly, the moving structure moves along the guiding structure, and is blocked and limited at the limiting structure; When the driving member drives the first sliding member to move along the first direction relative to the fixed seat, the second sliding member is fixed under the limit of the limit mechanism; and when the driving member drives the first positioning wheel assembly and makes the first positioning wheel expand to the extreme position, the moving structure breaks through the limit of the limit structure and continues to move along the guide structure under the drive of the driving member.

2. The positioning wheel device according to claim 1, characterized in that: The first positioning wheel assembly also includes a first adjusting structure, the first sliding member moves along the first direction relative to the fixed seat, and the first adjusting structure enables the two first positioning wheels to be expanded or retracted on the first plane; the driving member is a screw member, the threaded section of the screw member is threadedly connected to one of the first sliding member and the second sliding member, and the screw member is also limitedly arranged with the other of the first sliding member and the second sliding member to drive the first sliding member and the second sliding member to move along the first direction relative to the fixed seat during the screwing process.

3. The positioning wheel device according to claim 2, characterized in that: The first sliding member includes a first supporting plate having a threaded hole, the second sliding member includes a second supporting plate having a through hole, the screw member is arranged to pass through the through hole of the second supporting plate and the threaded hole of the first supporting plate, the screw rod of the screw member is limitedly connected to the through hole of the second supporting plate, and the threaded section of the screw member is threadedly connected to the threaded hole.

4. The positioning wheel device according to claim 3, characterized in that: The first sliding member and the second sliding member are respectively arranged on two side surfaces of the fixed seat, and the first support plate and the second support plate are both vertically arranged on the same side relative to the fixed seat; and the end of the second support plate is a U-shaped clamping structure, and the screw is clamped in the U-shaped mouth of the U-shaped clamping structure.

5. The positioning wheel device according to claim 4, characterized in that: The width of the channel formed by the stopper is slightly smaller than the width of the protruding portion.

6. The positioning wheel device according to claim 1, characterized in that: The second adjustment structure includes a guide plate arranged on the second sliding member, a rotating plate arranged on the second positioning wheel, and a rotating shaft, the fixed seat includes a fixed plate, the fixed plate, the guide plate and the rotating plate are sequentially arranged in abutment with each other through the rotating shaft, the guide plate includes 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 guide plate also includes a guide protrusion, the rotating plate includes a second waist-shaped hole arranged obliquely, the guide protrusion is slidably arranged in the second waist-shaped hole, and the rotating plate is rotatably arranged relative to the fixed plate through the rotating shaft; wherein, The limiting mechanism is a limiting structure arranged in the first waist-shaped hole or the second waist-shaped hole.

7. The positioning wheel device according to claim 6, characterized in that: The limiting mechanism is a limiting structure arranged in the first waist-shaped hole, and the limiting structure includes a stopper arranged in the first waist-shaped hole and extending inwardly, and the width of the channel formed by the stopper is slightly smaller than the width of the guide protrusion.

8. The positioning wheel device according to claim 6, characterized in that: The first sliding member and the second sliding member are respectively arranged on two side surfaces of the fixing seat, the guide plate passes through the fixing seat and is arranged on a side surface on the same side as the second sliding member, the second positioning wheel is arranged at the end of the rotating plate and moves up and down driven by the rotation of the rotating plate.

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