Folding locking mechanism of trolley and folding trolley

Abstract

The utility model discloses a folding locking mechanism of a trolley and a folding trolley. The folding locking mechanism comprises a main shaft; the spring is arranged on the main shaft in a sleeving manner; the sliding part is arranged on the main shaft in a sliding mode and oppositely arranged at the two ends of the spring, the sliding part comprises a sleeve and an abutting plate, the abutting plate is arranged at one end of the sleeve, and a lock column is installed on the abutting plate; the rotating part is rotationally arranged on the main shaft, a locking block is arranged on one side of the rotating part, and a first locking hole and a second locking hole which are matched with the locking column are formed in the locking block; the lock column can be selectively inserted into one of the first lock hole and the second lock hole, and then locking of the rotating part and the main shaft after relative rotation is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of trolleys, in particular to a folding and locking mechanism of a trolley and a folding trolley. Background Art

[0002] As a push-pull loading tool, a trolley is a small cart that is convenient for short-distance transportation of a small amount of goods. It has become increasingly popular in our lives. They do provide us with a lot of convenience. However, when it is necessary to carry heavy objects, it is more labor-saving and convenient to pull the cart. It is difficult to achieve excellent locking in the existing trolley and its folding state.

[0003] For example, a folding travel trailer proposed in the published patent No. CN110606115A installs a pull rod positioning magnet at a position corresponding to the positioning sleeve on the upper surface of the trailer flat. This pull rod positioning magnet attracts the metal screw on the positioning sleeve, so that the pull rod can always be in a state of closely adhering to the trailer flat, and can prevent the pull rod from automatically rotating when the trailer is in a folded state. Although this folding and locking method using a magnet has a certain degree of convenience, this locking method is relatively unstable. A relatively large force can release the pull rod from the folded state, and the trailer pull rod cannot be fixed within the optimal range.

[0004] The above content is only used to assist in understanding the technical solution of the present application, and does not represent an admission that the above content is the closest prior art to the present application. Summary of the Invention

[0005] Based on this, the present application provides a folding and locking mechanism of a trolley and a folding trolley to solve one of the above technical problems.

[0006] The technical solution adopted by the present application to solve its technical problems is a folding and locking mechanism of a trolley, including: a main shaft; a spring sleeved on the main shaft; a sliding part slidably arranged on the main shaft and oppositely arranged at both ends of the spring, including: a sleeve and an abutting plate, the abutting plate is arranged at one end of the sleeve, and a locking column is installed on the abutting plate; a rotating part rotatably arranged on the main shaft, a locking block is arranged on one side of the rotating part, and a first locking hole and a second locking hole are formed on the locking block and are matched with the locking column; the locking column can be selectively inserted into one of the first locking hole and the second locking hole, so as to realize the locking after the relative rotation of the rotating part and the main shaft.

[0007] In some embodiments, a convex part is formed at one end of the locking column, a locking column hole is formed on the abutting plate, the locking column is inserted into the locking column hole, and the convex part is in abutting cooperation with the abutting plate.

[0008] In some embodiments, an arc-shaped plate is installed on the abutting plate, and the arc-shaped plate abuts on the convex part.

[0009] In some embodiments, bushings are provided at both ends of the main shaft.

[0010] A folding trolley includes a folding locking mechanism as described above, and further includes a bottom plate. A dial block is provided on the sliding portion, at least a part of the dial block extends out of the bottom plate, and a pull rod is provided on the rotating portion.

[0011] In some embodiments, a fixing device is provided on the main shaft, and the fixing device is installed below the bottom plate.

[0012] In some embodiments, the fixing device includes a stop block and a fixing block. The stop block is arranged between the abutting plate and the lock block. A through hole matching the first lock hole and the second lock hole is formed on the baffle plate. The stop block is integrally L-shaped, a part of which is arranged on the fixing block, and the fixing block covers the outer periphery of the sleeve and is installed on the bottom plate.

[0013] The beneficial effect of the present application is that by simultaneously squeezing the sliding portions at both ends of the spring towards the spring, the locking post is withdrawn from one of the first lock hole and the second lock hole, and the rotating portion rotates relative to the main shaft, so that the locking post can be selectively inserted into one of the first lock hole and the second lock hole, enabling the folding trolley to remain locked after entering different states, and having excellent stability and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic three-dimensional structure diagram of the folding locking mechanism of the present application.

[0016] Figure 2 It is an exploded view of the folding locking mechanism of the present application.

[0017] Figure 3 It is a schematic three-dimensional structure diagram of the sliding portion of the present application.

[0018] Figure 4 It is a schematic diagram of the folding state of the folding trolley of the present application.

[0019] Figure 5 It is a schematic diagram of the trolley state of the folding trolley of the present application.

[0020] Figure 6 It is a schematic diagram of the towing state of the folding trolley of the present application.

[0021] Figure 7 It is a schematic bottom-up view of the folded state of the folding trolley of the present application.

[0022] Explanation of the reference numerals in the attached drawings: 1. Main shaft; 11. Bush; 2. Spring; 3. Sliding part; 31. Sleeve; 32. Contact plate; 321. Lock post hole; 33. Lock post; 331. Convex part; 34. Arc plate; 35. Pusher block; 4. Rotating part; 41. Lock block; 411. First lock hole; 412. Second lock hole; 5. Bottom plate; 6. Fixing device; 61. Stopper; 611. Through hole; 62. Fixed block; 7. Pull rod. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope of the present application.

[0024] In the embodiments of the present application, please refer to Figures 1-3 As shown, the present application provides a folding and locking mechanism for a trolley, mainly including: a main shaft 1; a spring 2 sleeved on the main shaft 1; a sliding part 3 slidably arranged on the main shaft 1 and oppositely arranged at both ends of the spring 2, including: a sleeve 31 and a contact plate 32, the contact plate 32 is arranged at one end of the sleeve 31, a lock post 33 is installed on the contact plate 32, a rotating part 4 rotatably arranged on the main shaft 1, a lock block 41 is arranged on one side of the rotating part 4, and a first lock hole 411 and a second lock hole 412 which are matched with the lock post 33 are opened on the lock block 41; the lock post 33 can be selectively inserted into one of the first lock hole 411 and the second lock hole 412, so as to realize the locking after the relative rotation of the rotating part 4 and the main shaft 1.

[0025] Specifically, the sliding parts 3 at both ends of the spring 2 slide towards the spring 2 at the same time. The sliding part 3 will drive the lock post 33 to be simultaneously withdrawn from the first lock hole 411 or the second lock hole 412, and then the rotating part 4 is rotated to a preset position so that the lock post 33 is aligned with one of the other two lock holes. When the sliding part 3 loses the force applied towards the spring 2, the sliding parts 3 at both ends return to their positions under the action of the spring 2, and the lock post 33 enters one of the lock holes to complete the locking.

[0026] Next, some preferred / improved embodiments based on the above embodiments will be further described. Any one or a combination of multiple ones can be selected from the following embodiments.

[0027] Referring to Figure 3 As shown, a convex portion 331 is formed at one end of the locking column 33. A locking column hole 321 is formed on the abutting plate 32. The locking column 33 is inserted into the locking column hole 321, and the convex portion 331 is in abutting fit with the abutting plate 32. An arc-shaped plate 34 is installed on the abutting plate 32, and the arc-shaped plate 34 abuts against the convex portion 331. With such a setting, the locking column 33 and the sliding portion 3 are in a split state. Compared with the locking column 33 integrated with the sliding portion 3, the assembly is easier, and the locking column 33 is less likely to break.

[0028] Specifically, shaft sleeves 11 are provided at both ends of the main shaft 1. The presence of the shaft sleeves 11 is used to abut against one side of the rotating portion 4 so that the rotating portion 4 will not exceed the main shaft 1 under the action of the spring 2. The shaft sleeves 11 can be connected to the frame of the folding cart to be installed as a locking mechanism on a part of the folding cart.

[0029] Referring to Figures 4-7 As shown, the present application further provides a folding cart, including the above-mentioned folding locking mechanism, and further including a bottom plate 5. A dial block 35 is provided on the sliding portion 3, and at least a part of the dial block 35 extends out of the bottom plate 5. A pull rod 7 is provided on the rotating portion 4.

[0030] Referring to Figure 6 As shown, when the locking column 33 is inserted into the first locking hole 411, the folding cart enters the towing state.

[0031] Referring to Figure 5 As shown, when the locking column 33 is inserted into the second locking hole 412, the folding cart enters the pushing state.

[0032] Referring to Figure 4 As shown, when the locking column 33 does not enter the first locking hole 411 or the second locking hole 412 and abuts against the locking block 41, the pull rod 7 is nearly attached to the bottom plate 5, and the folding cart enters the folding state.

[0033] Specifically, in the folding state, the rotation of the pull rod 7 can quickly make the locking column 33 enter the second locking hole 412, so that the folding cart enters the pushing state.

[0034] Specifically, a fixing device 6 is provided on the main shaft 1, and the fixing device 6 is installed below the bottom plate 5. The fixing device 6 includes a stop block 61 and a fixing block 62. The stop block 61 is arranged between the abutting plate 32 and the locking block 41. The stop block 61 is provided with a through hole 611 that cooperates with the first locking hole 411 and the second locking hole 412. The stop block 61 is integrally L-shaped, and a part of it is arranged on the fixing block 62. The fixing block 62 covers the outer periphery of the sleeve 31 and is installed on the bottom plate 5. With such an arrangement, the fixing device 6 can effectively install the folding locking mechanism on the trolley, and at the same time, the split design is more convenient for maintenance.

[0035] So far, various embodiments of the present application have been described in detail. To avoid obscuring the concept of the present application, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present application. The foregoing embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. The folding and locking mechanism of a trolley, characterized in that, Comprising: Main shaft; Spring, sleeved on the main shaft; Sliding part, slidably arranged on the main shaft and oppositely arranged at both ends of the spring. The sliding part includes a sleeve and a contact plate. The contact plate is arranged at one end of the sleeve, and a locking post is installed on the contact plate; Rotating part, rotatably arranged on the main shaft. A locking block is arranged on one side of the rotating part, and a first locking hole and a second locking hole are formed in the locking block and are adapted to the locking post; The locking post can be selectively inserted into one of the first locking hole and the second locking hole, so as to realize the locking after the relative rotation of the rotating part and the main shaft.

2. The folding and locking mechanism of the trolley according to claim 1, wherein A convex part is formed at one end of the locking post. A locking post hole is formed in the contact plate. The locking post is inserted into the locking post hole, and the convex part is in abutting cooperation with the contact plate.

3. The folding and locking mechanism of the trolley according to claim 2, characterized in that, An arc-shaped plate is installed on the contact plate, and the arc-shaped plate abuts against the convex part.

4. The folding and locking mechanism of the trolley according to claim 1, characterized in that, Shaft sleeves are arranged at both ends of the main shaft.

5. A folding trolley, characterized in that: Comprising the folding locking mechanism according to any one of claims 1-4, further comprising a bottom plate. A dial block is arranged on the sliding part, at least a part of the dial block extends out of the bottom plate, and a pull rod is arranged on the rotating part.

6. The folding trolley according to claim 5, characterized in that, A fixing device is arranged on the main shaft, and the fixing device is installed below the bottom plate.

7. The folding trolley according to claim 6, characterized in that, The fixing device includes a stop block and a fixing block. The stop block is arranged between the contact plate and the locking block. The stop block is provided with a through hole adapted to the first locking hole and the second locking hole. The stop block is integrally L-shaped, and a part of it is arranged on the fixing block. The fixing block covers the outer periphery of the sleeve and is installed on the bottom plate.

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