Anti-falling wheel set

Abstract

The utility model discloses an anti-falling wheel set which comprises an installation support used for being installed on a door plate. The roller part is rotationally arranged on the mounting bracket through a horizontally-arranged transverse shaft assembly and is used for being supported on the ground, and friction force for preventing the door plate from moving can be formed between the peripheral surface of the roller part and the ground; and the locking mechanism is arranged between the mounting bracket and the roller part, and can lock the roller part to prevent the roller part from rotating, or can unlock the roller part to allow the roller part to rotate. The roller parts are supported on the ground to share the stress of the rotating hinges of the door plate, and the situation that the door plate falls after long-term use can be prevented; when the locking mechanism prevents the rolling wheel piece from rotating, the friction force between the peripheral surface of the rolling wheel piece and the ground can prevent the door plate from rotating, the door plate can be stabilized at any opening position through the locking mechanism, and when the locking mechanism allows the rolling wheel piece to rotate, the rolling wheel piece can be driven to roll by applying small external force so that the door plate can rotate.

Description

Technical Field

[0001] The utility model relates to an anti-falling wheel set. Background Art

[0002] At present, the door panel of a general door is rotatably arranged on the door frame through hinges. The lower end surface of the door panel is at a certain height from the ground. The gravity of the door panel is all applied to the hinges. After long-term use, the hinges are prone to deformation and damage, resulting in the falling of the door panel. During actual use, the door has only two states: fully open and fully closed. Generally, when the door panel is fully closed, the door panel is locked by a lock on the door frame, and when the door panel is fully open, a door stopper assembly is used to position and fix the door panel. However, when it is necessary to fix the door panel after it is opened at a certain angle, this function cannot be achieved. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, one of the purposes of the utility model is to provide an anti-falling wheel set that can stably position the door panel at any open position and prevent the door panel from falling.

[0004] An anti-falling wheel set according to an embodiment of the utility model includes: a mounting bracket for mounting on the door panel; a roller member rotatably arranged on the mounting bracket through a horizontally arranged cross-axis assembly for supporting on the ground, and a frictional force that can prevent the movement of the door panel can be formed between the outer peripheral surface of the roller member and the ground; a locking mechanism arranged between the mounting bracket and the roller member, which can lock the roller member to prevent the roller member from rotating, or can unlock the roller member to allow the roller member to rotate.

[0005] The anti-falling wheel set according to the embodiment of the utility model has at least the following beneficial effects:

[0006] When the anti-falling wheel set with the above structure is installed on the door panel, the roller member supports on the ground to share the force of the rotating hinge of the door panel, and the situation of the door panel falling after long-term use can be prevented; when the locking mechanism locks the roller member to prevent the roller member from rotating, the frictional force between the outer peripheral surface of the roller member and the ground can prevent the door panel from rotating around the rotating hinge, that is, when the door panel rotates to any angular position, the locking mechanism can stably position the door panel at any open position. When the locking mechanism unlocks the roller member to allow the roller member to rotate, a small external force can be applied to drive the roller member to roll and rotate the door panel.

[0007] In some embodiments of the utility model, the locking mechanism includes a plurality of positioning holes axially spaced around the cross-axis assembly and distributed on the roller member, and a clutch locking member that can be combined with or separated from any one of the positioning holes.

[0008] In some embodiments of the present utility model, the clutch locking member includes a latch member and a first elastic member that drives one end of the latch member to extend toward the positioning hole. A positioning portion is provided on the latch member, and a first limiting portion corresponding to the positioning portion is provided on the mounting bracket. The positioning portion moves to elastically abut against the first limiting portion, causing the end of the latch member to leave the corresponding positioning hole.

[0009] In some embodiments of the present utility model, the mounting bracket is provided with a sleeve for the telescopic movement and rotation of the latch member. The positioning portion protrudes from the outer peripheral wall of the latch member and at least partially extends outside the sleeve. One end of the sleeve close to the positioning portion is provided with a first positioning groove and a second positioning groove. The first positioning groove constitutes the first limiting portion. The first positioning groove and the second positioning groove are arranged at intervals around the axial direction of the sleeve. The shortest distance between the first positioning groove and the roller member is greater than the shortest distance between the second positioning groove and the roller member. The positioning portion can elastically abut against the first positioning groove or the second positioning groove under the action of the first elastic member.

[0010] In some embodiments of the present utility model, the positioning hole is formed by radially inwardly recessing along the outer circumferential wall of the roller member. A plurality of the positioning holes are evenly spaced. The sleeve is arranged in the vertical direction. The positioning portion is provided at the upper end of the latch member. The first elastic member drives the lower end of the latch member to extend out of the lower end of the sleeve to insert into one of the positioning holes.

[0011] In some embodiments of the present utility model, the upper end surface of the sleeve is recessed downward to form the mutually orthogonal first positioning groove and the second positioning groove. The groove depth of the first positioning groove is less than the groove depth of the second positioning groove. The positioning portion is a cross pin radially penetrating through the upper part of the latch member at both ends. Both ends of the cross pin can rest on the first positioning groove or the second positioning groove. A constriction portion is provided in the upper part of the inner channel of the sleeve. The latch member has a boss portion slidably arranged in the inner channel of the sleeve. The boss portion is arranged opposite to the constriction portion. The first elastic member is sleeved outside the latch member and abuts against the boss portion and the constriction portion at both ends respectively.

[0012] In some embodiments of the present utility model, the mounting bracket includes a connecting bracket and a floating bracket that is lifted and lowered on the connecting bracket through a second elastic member. The horizontal shaft assembly and the roller member are both arranged on the floating bracket. The second elastic member drives the floating bracket to move downward relative to the connecting bracket so as to be able to elastically abut against the ground.

[0013] In some embodiments of the present utility model, the connecting bracket has two first side plates arranged face to face. Both of the two first side plates are provided with waist-shaped holes extending in the vertical direction. The heights of the two waist-shaped holes are flush. The two ends of the cross-axis assembly are respectively inserted into the two waist-shaped holes. The connecting bracket is provided with a vertical guiding hole. The floating bracket is provided with a sleeve that telescopically moves up and down along the vertical guiding hole. The second elastic member is sleeved outside the sleeve and its two ends abut between the connecting bracket and the floating bracket, so that the two ends of the cross-axis assembly move downward along the vertical guiding hole to make the roller member abut against the ground.

[0014] In some embodiments of the present utility model, a metal cylinder arranged along its axis is fixedly provided inside the roller member. The cross-axis assembly includes a circular shaft sleeve and a circular shaft member that are rotatably arranged inside the metal cylinder. The circular shaft sleeve and the circular shaft member can both move along the axis of the metal cylinder. One end of the circular shaft sleeve away from the circular shaft member is provided with a first rotating shaft portion. One end of the circular shaft member away from the circular shaft sleeve is provided with a second rotating shaft portion. The other end of the circular shaft member can extend into the circular shaft sleeve along the length direction of the metal cylinder. A third elastic member is arranged inside the circular shaft sleeve, and its two ends respectively abut between the circular shaft sleeve and the circular shaft member. The floating bracket is provided with two shaft holes that match the first rotating shaft portion and the second rotating shaft portion. The third elastic member drives the first rotating shaft portion and the second rotating shaft portion to respectively pass out of the corresponding shaft holes.

[0015] In some embodiments of the present utility model, the floating bracket has two second side plates corresponding to the two first side plates one by one. The two shaft holes are respectively arranged on the two second side plates. The two shaft holes and the two vertical guiding holes are arranged face to face. The third elastic member drives the first rotating shaft portion and the second rotating shaft portion to sequentially pass through the corresponding shaft holes and the vertical guiding holes. The first rotating shaft portion and the second rotating shaft portion can retract into the metal cylinder to disengage from the shaft holes and the vertical guiding holes.

[0016] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0018] Figure 1 is a schematic structural diagram of an embodiment of the anti-falling wheel set of the present utility model;

[0019] Figure 2 isFigure 1 Schematic diagram of the structural decomposition of the embodiment;

[0020] Figure 3 is Figure 1 Schematic diagram of a cross-section of the embodiment;

[0021] Figure 4 is Figure 1 Schematic diagram of another cross-section of the embodiment;

[0022] Reference numerals:

[0023] Mounting bracket 100; connecting bracket 110; waist-shaped hole 111; vertical guiding hole 112; floating bracket 120; shaft hole 121; roller member 200; metal cylinder 210; horizontal shaft assembly 300; circular shaft sleeve 310; first rotating shaft portion 311; circular shaft member 320; second rotating shaft portion 321; third elastic member 330; locking mechanism 400; positioning hole 410; clutch locking member 420; pin member 421; first elastic member 422; positioning portion 430; boss portion 440; sleeve 500; first positioning groove 510; second positioning groove 520; necking portion 530; second elastic member 600; anti-disengagement cap body 700. Detailed implementation manners

[0024] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0025] In the description of the present invention, it should be understood that for the orientation description, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0026] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] See Figures 1 to 4 , a fall-preventing wheel set of the present utility model includes: a mounting bracket 100 for mounting on a door panel; a roller member 200 rotatably disposed on the mounting bracket 100 through a horizontally arranged cross-axis assembly 300 for supporting on the ground, and a frictional force capable of preventing the movement of the door panel can be formed between the outer peripheral surface of the roller member 200 and the ground; a locking mechanism 400 disposed between the mounting bracket 100 and the roller member 200, capable of locking the roller member 200 to prevent the roller member 200 from rotating, or capable of unlocking the roller member 200 to allow the roller member 200 to rotate.

[0029] When the fall-preventing wheel set with the above structure is installed on a door panel, the roller member 200 supports on the ground to share the force of the rotating hinge of the door panel, which can prevent the door panel from falling after long-term use; when the locking mechanism 400 locks the roller member 200 to prevent the roller member 200 from rotating, the frictional force between the outer peripheral surface of the roller member 200 and the ground can prevent the door panel from rotating around the rotating hinge, that is, when the door panel rotates to any angular position, the locking mechanism 400 can stabilize the door panel at any open position. When the locking mechanism 400 unlocks the roller member 200 to allow the roller member 200 to rotate, a relatively small external force can be applied to drive the roller member 200 to roll and rotate the door panel, which is very convenient to use. Generally, the roller member 200 is made of at least one of plastic, rubber, and silicone. Such a roller member 200 has a large static frictional force with the ground, which is beneficial to improving the sliding frictional force when the roller member 200 slides relative to the ground, thereby effectively preventing the door panel from rotating when blown by the wind or lightly touched, and thus stabilizing the opening angle of the door panel when opening the door, and is applicable to air convection or certain privacy requirements.

[0030] It should be noted that in some embodiments, the main body part of the roller member 200 is made of a metal material, and a plastic layer, a rubber layer, or a silicone layer is wrapped around the outer peripheral part of the roller member 200, and similar effects can also be achieved, and a long service life can also be maintained.

[0031] See Figure 1, in this embodiment, the mounting bracket 100 is provided with two screw through holes in the height direction, and can be fixed on the side wall of the door panel by passing fastening screws through the screw through holes. Of course, according to the use requirements, the number of screw through holes can be appropriately increased. In other embodiments, the mounting bracket 100 can also adopt the following mounting method: first, a socket is fixed on the side wall of the door panel, a slot is provided on the socket, and the mounting bracket 100 is fixed on the socket by inserting a plug board that cooperates with the slot, so as to facilitate the overall removal or replacement of the anti-falling wheel set.

[0032] See Figure 2 and Figure 3 , in some embodiments of the present utility model, the locking mechanism 400 includes a plurality of positioning holes 410 that are axially spaced around the transverse axis assembly 300 and are distributed on the roller member 200, and a clutch locking member 420 that can be combined with or separated from any one of the positioning holes 410. It can be understood that during the rotation of the roller member 200, the positioning holes 410 at different positions pass through the position of the clutch locking member 420 one by one. When the clutch locking member 420 is aligned with one of the positioning holes 410, the clutch locking member 420 can enter the positioning hole 410 to lock the roller member 200, and the roller member 200 cannot rotate around the axis of the transverse axis assembly 300, so that the relative movement between the roller member 200 and the ground is switched from rolling to sliding. Also, since there is a large static friction between the outer circumferential surface of the roller member 200 and the ground, it plays a role in limiting and fixing the angular position when the door panel is opened. It should be noted that in order to enable the roller member 200 to be combined with one of the positioning holes 410 when generating the same angular displacement, the plurality of positioning holes 410 are circumferentially distributed at equal intervals around the axis of the transverse axis assembly 300, so as to make the adjustment of the opening angle of the door panel more linear. It can be understood that the more the number of positioning holes 410, the higher the accuracy of adjusting the opening angle of the door panel by using the locking mechanism 400.

[0033] See Figures 2 to 4, in some embodiments of the present utility model, the clutch locking member 420 includes a latch member 421 and a first elastic member 422 that drives one end of the latch member 421 to extend toward the positioning hole 410. A positioning portion 430 is provided on the latch member 421, and a first limiting portion corresponding to the positioning portion 430 is provided on the mounting bracket 100. The positioning portion 430 moves to elastically abut against the first limiting portion, causing the end of the latch member 421 to leave the corresponding positioning hole 410. It can be understood that one end of the latch member 421 is inserted into one of the positioning holes 410 under the action of the first elastic member 422, thereby directly locking the roller member 200 to prevent the roller member 200 from rotating around the axis of the cross-axis assembly 300. The contour shape of the end of the latch member 421 inserted into the positioning hole 410 is consistent with that of the positioning hole 410 to avoid the problem of relative movement. When the anti-falling wheel set needs to be switched to a state where the roller member 200 is allowed to rotate for a long time, the user drives the latch member 421 to move away from the positioning hole 410, causing the end of the latch member 421 to leave the positioning hole 410. At this time, the first limiting portion acts on the positioning portion 430 of the latch member 421 to overcome the action of the first elastic member 422, thereby preventing the latch member 421 from resetting to a state where its end enters the positioning hole 410.

[0034] See Figures 1 to 4 , in some embodiments of the present utility model, the mounting bracket 100 is provided with a sleeve 500 for the telescopic movement and rotation of the latch member 421. The positioning portion 430 protrudes from the outer peripheral wall of the latch member 421 and at least partially extends outside the sleeve 500. One end of the sleeve 500 close to the positioning portion 430 is provided with a first positioning groove 510 and a second positioning groove 520. The first positioning groove 510 constitutes the first limiting portion. The first positioning groove 510 and the second positioning groove 520 are arranged at intervals around the axis of the sleeve 500. The shortest distance between the first positioning groove 510 and the roller member 200 is greater than the shortest distance between the second positioning groove 520 and the roller member 200. The positioning portion 430 can elastically abut against the first positioning groove 510 or the second positioning groove 520 under the action of the first elastic member 422.

[0035] It should be noted that the first positioning groove 510 is the first limiting portion. The first positioning groove 510 and the second positioning groove 520 are arranged at intervals around the axial direction of the sleeve 500. When one end of the bolt member 421 is inserted into the positioning hole 410 under the driving of the first elastic member 422, the positioning portion 430 also abuts against the second positioning groove 520, which is beneficial to improving the stability when the bolt member 421 is locked. After the user moves the bolt member 421 in the direction of overcoming the elastic force of the first elastic member 422 to leave the positioning hole 410, the positioning portion 430 leaves the second positioning groove 520, and then rotates the bolt member 421 by a certain angle around the axial direction of the sleeve 500. At this time, the positioning portion 430 is aligned with the first positioning groove 510, and the positioning portion 430 enters the first positioning groove 510 under the action of the first elastic member 422. Since the shortest distance between the first positioning groove 510 and the roller member 200 is greater than the shortest distance between the second positioning groove 520 and the roller member 200, the end of the bolt member 421 close to the roller member 200 can be completely separated from the roller member 200, without affecting the normal rotation of the roller member 200. The locking mechanism 400 with the above structure is not only simple in structure, but also very simple in operation. When unlocking the roller member 200, only need to overcome the action of the first elastic member 422 to move the bolt member 421 away from the roller member 200 and then rotate it by a certain angle, so that the positioning portion 430 and the first positioning groove 510 are combined under the elastic restoring force of the first elastic member 422. In addition, it should be noted that when it is necessary to lock the roller member 200, the user overcomes the action of the first elastic member 422 to pull the bolt member 421 to make the positioning portion 430 leave the first positioning groove 510, and then rotates the bolt member 421 by a certain angle to make the positioning portion 430 face the second positioning groove 520. At this time, the end of the bolt member 421 close to the roller member 200 may abut against the position between two adjacent positioning holes 410. At this time, only need to slightly push the door panel to rotate a small angle to make the roller member 200 roll by a small angle, and one of the positioning holes 410 can be aligned with the end of the bolt member 421 for the bolt member 421 to insert, without the user bending down to operate, which is very simple and ingenious in operation. In order to facilitate the user to grasp the upper end of the bolt member 421 to pull up the bolt member 421, a anti-disengagement cap body 700 is connected to the upper part of the bolt member 421. The positioning portion 430 is a cross pin radially penetrating through the bolt member 421 and the anti-disengagement cap body 700. When the roller is removed from the mounting bracket 100, the anti-disengagement cap body 700 can also prevent the bolt member 421 from disengaging from the sleeve 500.

[0036] In addition, in other embodiments, the first limiting portion can also be movably arranged relative to the mounting bracket 100. For example, the first limiting portion is arranged on a screw rod threadedly connected to the mounting bracket 100, and the first limiting portion is extended to abut against the positioning portion 430 or retracted to be separated from the positioning portion 430 by rotating the screw rod, but the usage method is not as simple as the above solution.

[0037] SeeFigure 2 and Figure 4 , in some embodiments of the present utility model, the positioning holes 410 are formed by radially inwardly recessing along the outer circumferential wall of the roller member 200, and a plurality of the positioning holes 410 are arranged at equal intervals. The sleeve 500 is arranged in the vertical direction, and the positioning portion 430 is arranged at the upper end of the plug member 421. The first elastic member 422 drives the lower end of the plug member 421 to extend out of the lower end of the sleeve 500 and insert into one of the positioning holes 410. Among them, the first elastic member 422 is a compression spring. When the above structure is adopted, the moving direction of the plug member 421 is up and down telescopic. The user grabs the upper end of the plug member 421 and pulls it up to compress the first elastic member 422 and then rotates it until the positioning portion 430 is aligned with the first positioning groove 510. After releasing the hand, the first elastic member 422 recovers its elastic deformation and makes the positioning portion 430 enter the first positioning groove 510. At this time, there is a gap between the lower end of the plug member 421 and the outer circumferential wall of the roller member 200, which will not interfere with the rolling of the roller member 200; the action of lifting the plug member 421 upward and rotating it is in one step, which is convenient and labor-saving to operate. Moreover, compared with the way that the plug member 421 moves horizontally and telescopically, the locking mechanism 400 of this structure is more convenient to use. In addition, it should be noted that: when the positioning holes 410 are formed by radially inwardly recessing along the outer circumferential wall of the roller member 200, the part of the outer circumferential wall of the roller member 200 made of plastic or silica gel or rubber around the positioning holes 410 is prone to greater elastic deformation. If there is a relative sliding tendency between the roller member 200 and the ground, a greater static friction force can be formed between the roller member 200 and the ground, thereby reducing the possibility that the door panel rotates when blown by the wind or lightly touched. In this embodiment, the number of the positioning holes 410 is an even number. When one of the positioning holes 410 is combined with the plug member 421, one of the positioning holes 410 faces the ground.

[0038] Of course, in some other embodiments, the positioning holes 410 can also be recessed inwardly along the two side surfaces of the roller member 200. A plurality of the positioning holes 410 can still form a circumferential distribution around the horizontal axis assembly 300 at equal intervals. At this time, the sleeve 500 needs to be arranged in the horizontal direction, and the plug member 421 moves left and right to enter or leave the corresponding positioning holes 410.

[0039] See Figure 1 and Figure 2, in some embodiments of the present utility model, the upper end surface of the sleeve 500 is recessed downward to form the mutually orthogonal first positioning groove 510 and the second positioning groove 520. The groove depth of the first positioning groove 510 is less than the groove depth of the second positioning groove 520. The positioning portion 430 is a cross pin radially passing through the upper part of the plug member 421 at both ends. Both ends of the cross pin can lean against the first positioning groove 510 or the second positioning groove 520. A constriction portion 530 is provided in the upper part of the inner channel of the sleeve 500. The plug member 421 has a boss portion 440 slidably disposed in the inner channel of the sleeve 500. The boss portion 440 is disposed opposite to the constriction portion 530. The first elastic member 422 is sleeved outside the plug member 421 and abuts against the boss portion 440 and the constriction portion 530 at both ends respectively, which is beneficial to further improve the structural compactness of the anti-falling wheel set. It can be understood that the first positioning groove 510 and the second positioning groove 520 are respectively formed at the upper end of the sleeve 500, which further simplifies the structure of the locking mechanism 400, reduces the number of components and the assembly process. The groove depth of the first positioning groove 510 being less than the groove depth of the second positioning groove 520 can directly meet the setting requirement of "the shortest distance between the first positioning groove 510 and the roller member 200 is greater than the shortest distance between the second positioning groove 520 and the roller member 200". Among them, the first positioning groove 510 and the second positioning groove 520 are mutually orthogonal, and the positioning portion 430 is a cross pin. Both ends of the cross pin can lean against the first positioning groove 510 or the second positioning groove 520, so that the locking mechanism 400 can be stable in both the state of locking the roller member 200 and the state of unlocking the roller member 200.

[0040] See Figure 2 and Figure 3 , in some embodiments of the present utility model, in order to adapt to the situation that the ground may be uneven in height, the mounting bracket 100 includes a connecting bracket 110 and a floating bracket 120 that is lifted and lowered on the connecting bracket 110 through a second elastic member 600. The horizontal axis assembly 300 and the roller member 200 are both disposed on the floating bracket 120. The second elastic member 600 drives the floating bracket 120 to move downward relative to the connecting bracket 110 so as to be able to elastically abut against the ground. It can be understood that when there is a groove on the ground, the second elastic member 600 can elongate so that the roller member 200 on the floating bracket 120 can still support on the ground. When there is a protrusion on the ground, the second elastic member 600 can shorten so that the roller member 200 on the floating bracket 120 can still support on the ground.

[0041] See Figure 2 and Figure 3, in some embodiments of the present utility model, the connecting bracket 110 has two first side plates arranged face to face, both of the two first side plates are provided with waist-shaped holes 111 extending in the vertical direction, the heights of the two waist-shaped holes 111 are flush, both ends of the cross-axis assembly 300 are respectively inserted into the two waist-shaped holes 111, the connecting bracket 110 is provided with a vertical guiding hole 112, the floating bracket 120 is provided with a sleeve 500 that telescopically moves up and down along the vertical guiding hole 112, the second elastic member 600 is sleeved outside the sleeve 500 and its two ends abut between the connecting bracket 110 and the floating bracket 120, so that both ends of the cross-axis assembly 300 move downward along the vertical guiding hole 112 to make the roller member 200 abut against the ground. It can be understood that both ends of the cross-axis assembly 300 slide up and down along their respective corresponding waist-shaped holes 111, and the cooperation between the cross-axis assembly 300 and the waist-shaped holes 111 plays a guiding role in the lifting movement of the floating bracket 120 relative to the connecting bracket 110. The cooperation between the sleeve 500 and the vertical guiding hole 112 also plays a guiding role in the lifting movement of the floating bracket 120 relative to the connecting bracket 110, reducing the possibility that the roller member 200 cannot elastically abut against the ground. In addition, the second elastic member 600 is sleeved outside the sleeve 500 and its two ends abut between the connecting bracket 110 and the floating bracket 120, which is beneficial to improving the structural compactness, reducing the volume of the anti-falling wheel set, and facilitating miniaturization.

[0042] See Figure 2 and Figure 3, in some embodiments of the present utility model, a metal cylinder 210 arranged along its axial direction is fixedly provided inside the roller member 200. The horizontal shaft assembly 300 includes a circular shaft sleeve 310 and a circular shaft member 320 rotatably disposed inside the metal cylinder 210. Both the circular shaft sleeve 310 and the circular shaft member 320 can move along the axial direction of the metal cylinder 210. A first rotating shaft portion 311 is provided at one end of the circular shaft sleeve 310 away from the circular shaft member 320, and a second rotating shaft portion 321 is provided at one end of the circular shaft member 320 away from the circular shaft sleeve 310. The other end of the circular shaft member 320 can extend into the circular shaft sleeve 310 along the length direction of the metal cylinder 210. A third elastic member 330 is provided inside the circular shaft sleeve 310, with both ends respectively abutted between the circular shaft sleeve 310 and the circular shaft member 320. The floating bracket 120 is provided with two shaft holes 121 matching the first rotating shaft portion 311 and the second rotating shaft portion 321. The third elastic member 330 drives the first rotating shaft portion 311 and the second rotating shaft portion 321 to respectively pass through the corresponding shaft holes 121. It should be noted that the roller member 200 is generally made of plastic or rubber, and the horizontal shaft assembly 300 is generally a metal part. The relative rotation of the horizontal shaft assembly 300 with respect to the roller member 200 easily causes wear of the roller member 200, and the setting of the metal cylinder 210 can solve this problem. Among them, the metal cylinder 210, the circular shaft sleeve 310, and the circular shaft member 320 form a bearing part for the roller to rotate relative to the mounting bracket 100, which has a lower cost and a simpler structure compared to traditional bearing parts. When assembling the horizontal shaft assembly 300, the circular shaft sleeve 310, the third elastic member 330, and the circular shaft member 320 are respectively installed in the metal cylinder 210, and then the circular shaft sleeve 310 and the circular shaft member 320 are driven to approach each other in the direction of compressing the third elastic member 330. At this time, the first rotating shaft portion 311 and the second rotating shaft portion 321 can penetrate into the two shaft holes 121, and then the circular shaft sleeve 310 and the circular shaft member 320 are driven to approach each other again in the direction of compressing the third elastic member 330 so that the first rotating shaft portion 311 and the second rotating shaft portion 321 do not protrude from the shaft holes 121, and then the first rotating shaft portion 311 and the second rotating shaft portion 321 can penetrate into the two waist-shaped holes 111. It can be understood that the horizontal shaft assembly 300 can be disassembled by driving the circular shaft sleeve 310 and the circular shaft member 320 to approach each other in the direction of compressing the third elastic member 330 with the help of an external tool such as a thimble, so as to achieve detachable replacement.

[0043] In some embodiments of the present utility model, the floating bracket 120 has two second side plates corresponding to the first side plates one by one. Two of the shaft holes 121 are respectively provided on the two second side plates. The two shaft holes 121 are arranged face to face with the two vertical guiding holes 112. The third elastic member 330 drives the first rotating shaft portion 311 and the second rotating shaft portion 321 to sequentially pass through the corresponding shaft holes 121 and the vertical guiding holes 112. The first rotating shaft portion 311 and the second rotating shaft portion 321 can retract into the metal cylinder 210 to disengage from the shaft holes 121 and the vertical guiding holes 112.

[0044] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0045] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An anti-fall wheel set, characterized in that: include: A mounting bracket (100) for mounting on a door panel; A roller member (200) is rotatably mounted on the mounting bracket (100) via a horizontally arranged transverse shaft assembly (300) and is used to be supported on the ground. The outer peripheral surface of the roller member (200) can form a friction force with the ground to prevent the door panel from moving. A locking mechanism (400) is provided between the mounting bracket (100) and the roller member (200), and is capable of locking the roller member (200) to prevent the roller member (200) from rotating, or is capable of unlocking the roller member (200) to allow the roller member (200) to rotate.

2. The anti-fall wheel assembly according to claim 1, characterized in that: The locking mechanism (400) comprises a plurality of positioning holes (410) distributed on the roller member (200) at axial intervals around the transverse axis assembly (300), and a clutch locking member (420) capable of being combined with or separated from any of the positioning holes (410).

3. The anti-fall wheel assembly according to claim 2, characterized in that: The clutch locking member (420) comprises a latch member (421) and a first elastic member (422) for driving one end of the latch member (421) to extend toward the positioning hole (410); a positioning portion (430) is provided on the latch member (421); a first limiting portion corresponding to the positioning portion (430) is provided on the mounting bracket (100); the positioning portion (430) moves to elastically abut against the first limiting portion so that the end of the latch member (421) leaves the corresponding positioning hole (410).

4. The anti-fall wheel assembly according to claim 3, characterized in that: The mounting bracket (100) is provided with a sleeve (500) for the latch member (421) to move telescopically and rotate. The positioning portion (430) protrudes from the outer peripheral wall of the latch member (421) and at least partially extends out of the sleeve (500). The sleeve (500) is provided with a first positioning groove (510) and a second positioning groove (520) at one end close to the positioning portion (430). The first positioning groove (510) constitutes the first limiting portion. The first positioning groove (510) and the second positioning groove (520) are arranged at intervals around the axial direction of the sleeve (500). The shortest distance between the first positioning groove (510) and the roller member (200) is greater than the shortest distance between the second positioning groove (520) and the roller member (200). The positioning portion (430) can elastically abut against the first positioning groove (510) or the second positioning groove (520) under the action of the first elastic member (422).

5. The anti-fall wheel assembly according to claim 4, characterized in that: The positioning hole (410) is formed by being recessed radially inward along the outer circumferential wall of the roller member (200), and a plurality of the positioning holes (410) are evenly spaced. The sleeve (500) is arranged in a vertical direction, and the positioning portion (430) is arranged at the upper end of the latch member (421). The first elastic member (422) drives the lower end of the latch member (421) to extend out of the lower end of the sleeve (500) so as to be inserted into one of the positioning holes (410).

6. The anti-fall wheel assembly according to claim 5, characterized in that: The upper end surface of the sleeve (500) is recessed downward to form the first positioning groove (510) and the second positioning groove (520) which are orthogonal to each other. The groove depth of the first positioning groove (510) is smaller than the groove depth of the second positioning groove (520). The positioning portion (430) is a transverse pin with two ends radially penetrating the upper part of the latch member (421). Both ends of the transverse pin can be abutted against the first positioning groove (510) or the second positioning groove (520). A constriction portion (530) is provided at the upper part of the internal channel of the sleeve (500). The latch member (421) has a boss portion (440) slidably arranged in the internal channel of the sleeve (500). The boss portion (440) is arranged opposite to the constriction portion (530). The first elastic member (422) is sleeved on the outside of the latch member (421) and its two ends are respectively abutted against the boss portion (440) and the constriction portion (530).

7. The anti-fall wheel assembly according to claim 1, characterized in that: The mounting bracket (100) comprises a connecting bracket (110) and a floating bracket (120) which is raised and lowered on the connecting bracket (110) by a second elastic member (600); the transverse axis assembly (300) and the roller member (200) are both arranged on the floating bracket (120); the second elastic member (600) drives the floating bracket (120) to move downward relative to the connecting bracket (110) so as to be able to elastically abut against the ground.

8. The anti-fall wheel assembly according to claim 7, characterized in that: The connecting bracket (110) has two first side plates arranged face to face, and the two first side plates are both provided with waist-shaped holes (111) extending in the vertical direction, and the two waist-shaped holes (111) are flush with each other in height. The two ends of the transverse axis component (300) are respectively penetrated through the two waist-shaped holes (111), and the connecting bracket (110) is provided with a vertical guide hole (112). The floating bracket (120) is provided with a sleeve (500) that can be extended and retracted up and down along the vertical guide hole (112). The second elastic member (600) is sleeved on the outside of the sleeve (500) and the two ends are abutted between the connecting bracket (110) and the floating bracket (120), so that the two ends of the transverse axis component (300) move downward along the vertical guide hole (112) to make the roller member (200) abut against the ground.

9. The anti-fall wheel assembly according to claim 8, characterized in that: The roller member (200) is fixedly provided with a metal cylinder (210) arranged along its axial direction inside. The transverse axis assembly (300) comprises a circular shaft sleeve (310) and a circular shaft member (320) rotatably arranged inside the metal cylinder (210). Both the circular shaft sleeve (310) and the circular shaft member (320) can move along the axial direction of the metal cylinder (210). The end of the circular shaft sleeve (310) away from the circular shaft member (320) is provided with a first rotating shaft portion (311). The end of the circular shaft member (320) away from the circular shaft sleeve (310) is provided with a second rotating shaft portion (321). The other end of the member (320) can extend into the circular sleeve (310) along the length direction of the metal cylinder (210), and the interior of the circular sleeve (310) is provided with a third elastic member (330) with two ends respectively abutting between the circular sleeve (310) and the circular shaft member (320), and the floating bracket (120) is provided with two shaft holes (121) matching the first rotating shaft portion (311) and the second rotating shaft portion (321), and the third elastic member (330) drives the first rotating shaft portion (311) and the second rotating shaft portion (321) to pass through the corresponding shaft holes (121) respectively.

10. The anti-fall wheel assembly according to claim 9, characterized in that: The floating bracket (120) has two second side plates corresponding to the first side plates one by one, the two shaft holes (121) are respectively arranged on the two second side plates, the two shaft holes (121) and the two vertical guide holes (112) are arranged face to face, the third elastic member (330) drives the first rotating shaft portion (311) and the second rotating shaft portion (321) to pass through the corresponding shaft holes (121) and the vertical guide holes (112) in sequence, and the first rotating shaft portion (311) and the second rotating shaft portion (321) can be retracted into the metal cylinder (210) and disengaged from the shaft holes (121) and the vertical guide holes (112).

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