CN109969237B - Semi-automatic portable four-wheel linkage folding small trailer - Google Patents
Semi-automatic portable four-wheel linkage folding small trailer Download PDFInfo
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- CN109969237B CN109969237B CN201711453969.4A CN201711453969A CN109969237B CN 109969237 B CN109969237 B CN 109969237B CN 201711453969 A CN201711453969 A CN 201711453969A CN 109969237 B CN109969237 B CN 109969237B
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- pipe
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- 235000004443 Ricinus communis Nutrition 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
- B62B2205/12—Collapsible wheels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Handcart (AREA)
Abstract
The invention relates to a folding vehicle, in particular to a semi-automatic portable four-wheel linkage folding small trailer, which comprises a pull rod assembly, a folding operating frame assembly and a folding cloth bag, wherein the folding operating frame assembly comprises an operating frame body and a bottom plate, two sides of the bottom of the operating frame body are symmetrically provided with a trundle unit, two ends of the two trundle units are fixedly connected through a baffle frame structure, the baffle frame structure comprises a baffle frame and a supporting seat arranged at the bottom of the baffle frame, a second connecting pipe on the trundle unit is arranged right above a first connecting pipe on the trundle unit, one end of the second connecting pipe is sequentially sleeved with an engagement cam pipe and a clutch pipe sleeve, the engagement cam pipe is in engagement connection with the clutch pipe sleeve through a locking mechanism, and a linkage folding structure is further arranged between the supporting seat and the second connecting pipe to enable the supporting seat to rotate and fold inwards.
Description
Technical Field
The invention relates to a trolley, in particular to a semi-automatic portable four-wheel linkage folding small trailer.
Background
When people carry articles in shopping, four-wheel trailers are usually used for saving effort, and the existing folding trailers on the market have the defects of complicated unfolding and folding operation, difficult dragging and steering, poor flexibility and the like.
Disclosure of Invention
Therefore, the main purpose of the invention is to provide a semi-automatic portable four-wheel linkage folding small trailer which is simple in folding and unfolding operation, good in flexibility, convenient and quick to use and high in cost performance, so as to solve the problems in the prior art.
The invention adopts the technical proposal for solving the technical problems that:
a semi-automatic portable four-wheel linkage folding small trailer comprises a pull rod assembly, a folding operating frame assembly and a folding cloth pocket, wherein the folding operating frame assembly comprises an operating frame body and a bottom plate, two sides of the bottom of the operating frame body are symmetrically provided with a trundle unit, the trundle unit comprises a first connecting pipe, a second connecting pipe, a universal trundle and a directional trundle, one end of the bottom of the first connecting pipe is rotationally connected with the universal trundle, the other end of the first connecting pipe is fixedly connected with the directional trundle, the second connecting pipe is arranged right above the first connecting pipe, the second connecting pipe is sequentially sheathed with an engaging cam pipe and a clutch pipe sleeve, the other end of the second connecting pipe is sequentially sheathed with a positioning cam pipe and a positioning pipe sleeve, one end of the engaging cam pipe is provided with an outer convex gear block, one end of the clutch pipe sleeve is provided with an inner convex gear block engaged with the outer convex gear block, the engaging cam pipe is fixedly connected with one end of the first connecting pipe and is engaged with the clutch pipe sleeve through a locking mechanism, the positioning pipe sleeve is fixedly connected with one end of the first connecting pipe, the bottom plate is arranged on the operating frame body and is fixedly connected with the second connecting pipe with caster units on two sides, two ends of the two caster units are fixedly connected through a baffle frame structure, the baffle frame structure comprises a baffle plate frame and a supporting seat arranged at the bottom of the baffle plate frame, a linkage folding structure is also arranged between the supporting seat and the second connecting pipe, the supporting seat and the second connecting pipe can rotate and fold inwards and fold flatly under the action of the linkage folding structure, the folding cloth pocket is fixedly connected on the bottom plate, grooves are radially arranged on two sides of the folding cloth pocket, clamping grooves are vertically arranged at the tops of the grooves, the clamping grooves are sleeved on the baffle plate frame, bases are arranged at the bottoms of the grooves, the bottoms of the inner sides of the bases are fixedly connected with the bottoms of the bottom plate, the pull rod assembly comprises a telescopic pull rod and a handle, the handle is fixedly connected at the tops of the telescopic pull rod, the bottom of the telescopic pull rod is provided with a connecting end fixedly connected with one side of the control frame body, two sides of the connecting end are provided with limiting blocks, and the limiting blocks are radially arranged on the supporting seat;
further, the linkage folding structure comprises an operation frame, a fixed block, a fixed pull lock head group, a first linkage block and a second linkage block, wherein the first linkage block is respectively and fixedly connected to two ends of a supporting seat, the first linkage block is provided with a containing cavity, the second linkage block is respectively and fixedly connected to the left end and the right end of a second connecting pipe, the fixed block is arranged in the containing cavity and is fixedly connected with the second linkage block, the upper part of the operation frame is provided with a bending part, the lower part of the operation frame is movably connected with the first linkage block through a connecting shaft, the fixed pull lock head group is arranged in the containing cavity, one end of the fixed pull lock head group is fixedly connected with the connecting shaft, the other end of the fixed pull lock head group is fixedly connected with the locking mechanism, the bending part is pressed, the lower part of the operation frame rotates along the connecting part of the fixed pull lock head group and drives the fixed on the connecting shaft to apply a pulling force to the locking mechanism.
Further, this locking mechanism includes sliding column, a spring, the fixed column, pulling piece, first cylindric lock and second cylindric lock, spring one end and sliding column fixed connection, its other end and fixed column fixed connection, be equipped with spout and pinhole on the second connecting pipe, first cylindric lock passes clutch sleeve in proper order, spout and sliding column with sliding column sliding connection in the second connecting pipe, second cylindric lock passes clutch sleeve in proper order, pinhole and fixed column fixed connection in the second connecting pipe, pulling piece one end is equipped with the pull head, pull head fixed connection is on sliding column inner wall, its other end passes sliding column in proper order, a spring, fixed column and plastic fixed block are being parallel to first connecting pipe fixed connection on fixed tapered end group, make pulling piece to fixed tapered end group direction pulling and drive the sliding column and remove along spout to fixed tapered end group direction when fixed tapered end group rotates, make meshing cam pipe and clutch sleeve separation.
Further, a first linkage tooth is arranged on the outer side of the upper portion of the first linkage block, a second linkage tooth is arranged on the outer side of the upper portion of the second linkage block, the first linkage tooth is perpendicular to the second linkage tooth and is in meshed connection with the second linkage tooth, when the first linkage tooth rotates, the second linkage gear is driven to rotate, and the rotating direction of the first linkage tooth is perpendicular to the rotating direction of the second linkage tooth.
Further, the semi-automatic portable four-wheel linkage folding small trailer is also provided with a pull rod clamp corresponding to the telescopic pull rod, the pull rod clamp is fixedly connected to one side of the top of the baffle frame, and the telescopic pull rod can be clamped on the pull rod clamp.
Further, the semi-automatic portable four-wheel linkage folding small trailer is also provided with a pull rod clamp corresponding to the telescopic pull rod, the pull rod clamp is fixedly connected to one side of the top of the baffle frame, and the telescopic pull rod is clamped on the pull rod clamp.
Further, the semi-automatic portable four-wheel linkage folding small trailer is also provided with a lap joint buckle which is in a hook shape and is fixedly connected under the telescopic pull rod.
Further, the pulling piece is a pulling piece or a pulling rope or a pulling rod.
Further, the limiting block is plate-shaped.
The beneficial technical effects of the invention are as follows:
1. the semi-automatic portable four-wheel linkage folding small trailer provided by the invention can realize two-step folding of the small trailer through the linkage folding structure, the locking mechanism, the first linkage block and the second linkage block, wherein the first linkage tooth is arranged on the outer side of the first linkage block, the second linkage tooth is arranged on the outer side of the upper part of the second linkage block, the first linkage tooth is perpendicular to the first linkage tooth and is in meshed connection with the second linkage tooth, and meanwhile, the baffle frame, the first connecting pipe, the universal castor and the directional castor are driven to fold inwards and fold flatly, so that the purpose of rapidly folding the small trailer is achieved, and the semi-automatic four-wheel linkage folding small trailer is simple in operation, good in flexibility, convenient and quick to use and high in cost performance.
2. According to the invention, the universal wheels and the directional wheels are used in a matched manner, the structure of the universal wheels allows 360-degree horizontal rotation, the dragging steering performance of the semi-automatic portable four-wheel linkage folding small trailer can be improved, and the dragging steering is more convenient and quicker during folding.
In order to make the technical scheme and the technical effect of the invention clearer and more definite, the semi-automatic portable four-wheel linkage folding small trailer disclosed by the invention is described in detail below with reference to the attached drawings and the specific embodiments of the specification.
Drawings
Fig. 1: the semi-automatic portable four-wheel linkage folding small trailer structure schematic diagram of the invention;
fig. 2: FIG. 1 is a schematic view showing the folding manipulator assembly in a disassembled configuration;
fig. 3: FIG. 1 is a schematic view of the caster unit in a disassembled configuration;
fig. 4: FIG. 1 is an enlarged partial schematic view of the positional relationship of the fixed latch head set, the first linkage block and the operator frame;
fig. 5: an enlarged schematic view of a in fig. 2;
fig. 6: an enlarged schematic view of B in fig. 1;
fig. 7: an enlarged schematic view of C in FIG. 1;
fig. 8: FIG. 1 is a schematic diagram of a front structure of a semi-automatic portable four-wheel linkage folding small trailer after being folded;
fig. 9: FIG. 1 is a schematic diagram of a rear side structure of a semi-automatic portable four-wheel linkage folding small trailer after being folded;
indication:
1-baffle frame, 2-universal casters 2, 3-telescopic pull rod, 4-folding cloth bag, 5-directional casters, 6-handle, 7-bottom plate, 8-operation frame, 9-groove and 10-overlap buckle;
11-a first linkage block, 12-an engaged cam tube, 13-a clutch tube sleeve, 14-a positioning tube sleeve and 15-a positioning wheel tube;
the device comprises a first connecting pipe, a second connecting pipe, a fixed block, a second linkage block, a sliding column, a spring, a positioning column, a pull head, a pulling piece, a first cylindrical pin, a second cylindrical pin, a connecting shaft, a bending part, a supporting seat, a sliding chute and a pin hole, wherein the first connecting pipe, the second connecting pipe, the fixed block, the second linkage block, the sliding column, the spring, the positioning column, the sliding column, the pull head, the pulling piece, the cylindrical pin, the connecting shaft, the bending part, the supporting seat, the sliding chute and the pin hole are respectively arranged in sequence, and the connecting shaft, the bending part, the supporting seat, the sliding chute and the pin hole are respectively arranged in sequence;
103-second linkage teeth, 104-first linkage teeth, 105-outer convex gear blocks, 106-inner convex gear blocks, 201-connecting ends and 202-overlap buckles;
1001-pull rod clamps, 1002-limiting blocks and 1003-fixed pull lock head groups;
Detailed Description
Referring to fig. 1 to 9, the present application relates to a semi-automatic portable four-wheel linkage folding small trailer, which includes a pull rod assembly, a folding console assembly and a folding cloth bag 4.
Referring to fig. 2 to 4, the folding operation frame assembly comprises an operation frame 8 and a bottom plate 7, two sides of the bottom of the operation frame 8 are symmetrically provided with a unit with casters, in detail, the unit with casters comprises a first connecting pipe 21, a second connecting pipe 22, universal casters 2 and directional casters 5, the first connecting pipe 21 is a square tubular body, one end of the bottom of the first connecting pipe 21 is rotationally connected with the universal casters 2, the other end of the first connecting pipe is fixedly connected with the directional casters 5, the structure of the universal casters 2 allows 360-degree rotation, the directional casters have no rotating structure and cannot rotate, two universal wheels are arranged near one end of a telescopic pull rod and can move along any direction, the operation folding or unfolding or pushing efficiency of the semi-automatic portable four-wheel linkage folding trailer is greatly improved, the second connecting pipe 22 is a circular tubular body, the second connecting pipe 22 is fixedly connected to the top of the first connecting pipe 21, one end (in this embodiment, the end close to the universal castor 2) of the second connecting pipe 22 is sequentially sleeved with the engaging cam pipe 12 and the clutch pipe sleeve 13, the other end (in this embodiment, the end close to the directional castor 5) is sequentially sleeved with the positioning cam pipe 15 and the positioning pipe sleeve 14, one end of the engaging cam pipe 12 is provided with the convex gear block 105, the clutch pipe sleeve 13 is movably connected with the second connecting pipe 22, two ends of the two castor units are respectively and fixedly connected through a baffle frame structure, as shown in figure 5, the baffle frame structure comprises a baffle frame 1 and a supporting seat arranged at the bottom of the baffle frame 1, one end of the supporting seat and one end of the second connecting pipe 22 are provided with the inner convex gear block 106 meshed with the convex gear block 105, the engaging cam pipe 12 is fixedly connected to one end of the first connecting pipe 21 and is meshed with the clutch pipe sleeve 13 through a locking mechanism, the locating pipe sleeve 14 is fixedly connected to the other end of the first connecting pipe 21, the locating pipe sleeve 14 is fixedly connected with the locating wheel pipe 15, the bottom plate 7 is arranged on the operating frame 8 body and is also provided with a linkage folding structure with two side belt caster wheels, the supporting seat and the second connecting pipe 22 can rotate under the action of the linkage folding structure and simultaneously drive the baffle frame 1, the first connecting pipe 21, the universal caster wheels 2 and the directional caster wheels 5 to fold inwards and fold flatly, so that the quick folding of the semi-automatic portable four-wheel linkage folding small trailer is realized, and the method is as follows:
the linkage folding structure disclosed by the application comprises an operation frame 8, a fixed block 23, a fixed pull lock head group 1003, a first linkage block 11 and a second linkage block 24, wherein the first linkage block 11 is respectively and fixedly connected to two ends of a supporting seat, the first linkage block 11 is provided with a containing cavity, the second linkage block 24 is respectively and fixedly connected to two ends of a second connecting pipe 22, the fixed block 23 is arranged in the containing cavity and is fixedly connected with the second linkage block 24, the upper part of the operation frame 8 is provided with a bending part, the lower part of the operation frame 8 is movably connected with the first linkage block 11 through a connecting shaft, the fixed pull lock head group 1003 is arranged in the containing cavity, one end of the fixed pull lock head group 1003 is fixedly connected with the connecting shaft, the other end of the fixed pull lock head group 1003 is fixedly connected with the fixed block through a locking mechanism, the bending part is pressed, the lower part of the operation frame rotates along the connecting part of the fixed pull lock head group 1003 which is fixedly arranged on the connecting shaft, and the fixed pull lock mechanism is applied with a pulling force:
as shown in fig. 3, the locking mechanism disclosed in the present application comprises a sliding column 25, a spring 26, a fixed column 27, a pulling member 30, a first cylindrical pin 31 and a second cylindrical pin 32, in this embodiment, the pulling member 30 may be a steel pulling lock or a pull rope or a pull rod, one end of the spring 26 is fixedly connected with the sliding column 25, the other end of the spring is fixedly connected with the fixed column 27, a strip-shaped chute 35 and a pin hole 36 are arranged on the second connecting tube 22, the first cylindrical pin 31 sequentially passes through the clutch sleeve 13, the chute 35 and the sliding column 25 to slidingly connect the sliding column 25 in the second connecting tube 22, the second cylindrical pin 32 sequentially passes through the pin hole 36 and the fixed column 27 to fixedly connect the fixed column in the second connecting tube 22, one end of the pulling member 30 is provided with a pull head 29, the pull head 29 is fixedly connected on the inner wall of the sliding column 25, the other end of the folding operation frame sequentially passes through the sliding column 25, the spring 26, the fixed 27 column and the fixed block 23 and is fixedly connected on the fixed tapered end group 1003 in parallel to the first connecting pipe 21, namely, the fixed tapered end group 1003 rotates to apply a pulling force to the pulling piece 30, so that the sliding column 25 moves along the sliding groove 35 towards the positioning pipe sleeve 14 to pull the clutch pipe sleeve 13 away from the engaged cam pipe 12, so that the clutch pipe sleeve 13 cannot be engaged and connected, preferably, as shown in fig. 5, 6 and 7, the first linkage block 11 is provided with a first linkage tooth 104 on the outer upper part of the outer side, the second linkage block 24 is provided with a second linkage tooth 103 on the outer side, the first linkage tooth 104 is perpendicular to the second linkage tooth 103 and is engaged and connected with the second linkage tooth 103, when the first linkage tooth 104 rotates to drive the second linkage tooth 103 to rotate, the rotating direction of the first linkage tooth 104 is perpendicular to the rotating direction of the second linkage tooth 103, and the folding operation frame assembly of the application operates according to the following principle:
the fixed pulling lock head group 1003 rotates to apply a pulling force to the pulling piece 30, so that the sliding column 25 moves along the sliding groove 35 towards the positioning pipe sleeve 14, the clutch pipe sleeve 13 is pulled away from the engagement cam pipe 12 to enable the clutch pipe sleeve to be in engagement connection, the first linkage teeth 104 rotate towards the Y axis direction and drive the second linkage teeth 103 to rotate towards the X axis direction, namely, the first connecting pipe is folded inwards along the X axis direction around the second connecting pipe 22, at the moment, the baffle frame 1 units at any one end of the two ends of the baffle frame unit are pushed at will, the first connecting pipe 21, the universal casters 2 and the directional casters 5 in the baffle frame units symmetrically arranged at the two sides of the bottom of the operating frame 8 rotate inwards around the second connecting pipe 22 and are folded and folded, and finally, the baffle frame 1 and the support in the baffle frame structure at two sides rotate inwards to fold and fold towards the inner side of the operating frame 8, and finally the folded state shown in fig. 8-9 is realized.
The application discloses a folding cloth pocket 4 is folding cloth pocket 4, folding cloth pocket 4 fixed connection on bottom plate 7, and its both sides radially are equipped with recess 9, and the recess 9 top is equipped with the joint groove, and the joint groove cover is established on baffle frame 1, and baffle frame 1 one side that sets up in opposite directions offsets with recess 9 interior bottom surface.
The utility model discloses a pull rod assembly includes flexible pull rod 3 and handle 6, handle 6 fixed connection is at flexible pull rod 3 top, flexible pull rod 3 bottom is equipped with the link of fixed connection with 8 body one side of operation frame, link both sides are provided with and are plate form stopper 1002, stopper 1002 radially sets up on supporting seat 34, prevent that flexible pull rod 3 from transition to deviate to left or right both ends when pulling, influence folding frame's stability, preferably, the fixed connection has a overlap joint 10 that takes the form of hook under flexible pull rod 3, this overlap joint 10 fixed connection is on the operation frame 8 body, through changing overlap joint 10, can make folding semi-automatic portable four-wheel linkage folding small trailer or the semi-automatic portable four-wheel linkage folding small trailer of expansion drag on other travel tools fast, convenient to carry, convenient to use, application scope is wider;
referring to fig. 1, in this embodiment, a pull rod clamp 1001 corresponding to the telescopic pull rod 3 is further provided on the semi-automatic portable four-wheel linkage folding small trailer, the pull rod clamp 1001 is fixedly connected to one side of the top of the baffle frame 1, specifically, the pull rod clamp 1001 is provided with a mounting hole, a screw passes through the mounting hole to realize the assembly of the pull rod clamp 1001, and the telescopic pull rod 3 is engaged with the folding cloth pocket 4 and is clamped on the pull rod clamp 1001.
In summary, the semi-automatic portable four-wheel linkage folding small trailer provided by the invention has the advantages of simplicity in use and operation, good flexibility, convenience and rapidness in folding and high cost performance.
While the preferred embodiments of the present invention have been described in detail in connection with the drawings of the specification, it should be noted that the scope of the present invention includes but is not limited to the above embodiments; the specific structure disclosed in the drawings of the specification is also a preferred embodiment of the present invention, and other embodiments can be developed on the basis of the above description by those skilled in the art, so that any simple modification or equivalent substitution without departing from the innovative concepts of the present invention is encompassed by the present invention, and falls within the scope of protection of the present invention.
Claims (7)
1. The utility model provides a semi-automatic portable four-wheel linkage folding small trailer which characterized in that: comprises a pull rod assembly, a folding operating frame assembly and a folding cloth bag;
the folding operation frame assembly comprises an operation frame body and a bottom plate, two sides of the bottom of the operation frame body are symmetrically provided with a trundle unit, the trundle unit comprises a first connecting pipe, a second connecting pipe, universal trundles and directional trundles, one end of the bottom of the first connecting pipe is rotationally connected with the universal trundles, the other end of the first connecting pipe is fixedly connected with the directional trundles, the second connecting pipe is arranged right above the first connecting pipe, one end of the second connecting pipe is sequentially sleeved with a meshing cam pipe and a clutch pipe sleeve, the other end of the second connecting pipe is sequentially sleeved with a positioning cam pipe and a positioning pipe sleeve, one end of the meshing cam pipe is provided with an outer convex gear block, one end of the clutch pipe sleeve is provided with an inner convex gear block meshed with the outer convex gear block, the meshing cam pipe is fixedly connected with one end of the first connecting pipe and is meshed with the clutch pipe sleeve through a locking mechanism, the positioning pipe sleeve is fixedly connected with one end of the first connecting pipe, the bottom plate is arranged on the operation frame body and is fixedly connected with the second connecting pipe on the two sides of the trundle unit, two ends of the trundle unit are fixedly connected through a baffle frame structure, the baffle frame structure comprises a baffle frame and a support seat which is arranged between the support seat and a support seat which can be further arranged in a linkage seat and a folding seat which is arranged between the support seat and a rotating seat and a folding seat;
the folding cloth bag is fixedly connected to the bottom plate, grooves are radially formed in two sides of the folding cloth bag, clamping grooves are vertically formed in the tops of the grooves, the clamping grooves are sleeved on the baffle plate frame, a base is arranged at the bottom of the grooves, and the bottom of the inner side of the base is fixedly connected with the bottom of the bottom plate;
the pull rod assembly comprises a telescopic pull rod and a handle, the handle is fixedly connected to the top of the telescopic pull rod, a connecting end fixedly connected with one side of the control frame body is arranged at the bottom of the telescopic pull rod, limiting blocks are arranged on two sides of the connecting end, and the limiting blocks are radially arranged on the supporting seat;
the linkage folding structure comprises an operation frame, fixing blocks, a fixed pulling lock head group, a first linkage block and a second linkage block, wherein the first linkage block is fixedly connected with two ends of a supporting seat respectively, the first linkage block is provided with a containing cavity, the second linkage block is respectively fixed at the left end and the right end of a second connecting pipe, the fixing blocks are arranged in the containing cavity and are fixedly connected with the second linkage block, the upper part of the operation frame is provided with a bending part, the lower part of the operation frame is movably connected with the first linkage block through a connecting shaft, the fixed pulling lock head group is arranged in the containing cavity, one end of the fixed pulling lock head group is fixedly connected with the connecting shaft, the other end of the fixed pulling lock head group is fixedly connected with the locking mechanism, the bending part is pressed, the lower part of the operation frame rotates along the connecting part of the fixed pulling lock head group fixed on the connecting shaft and drives the fixed pulling lock head group to rotate, and the fixed pulling lock head group applies a pulling force to the locking mechanism.
2. A semi-automatic portable four-wheel ganged folding cart as set forth in claim 1, wherein: the locking mechanism comprises a sliding column, a spring, a fixed column, a pulling piece, a first cylindrical pin and a second cylindrical pin, wherein one end of the spring is fixedly connected with the sliding column, the other end of the spring is fixedly connected with the fixed column, a sliding groove and a pin hole are formed in the second connecting pipe, the first cylindrical pin sequentially penetrates through a clutch sleeve, the sliding groove and the sliding column to enable the sliding column to be in sliding connection with the second connecting pipe, the second cylindrical pin sequentially penetrates through the clutch sleeve, the pin hole and the fixed column to enable the fixed column to be fixedly connected with the second connecting pipe, a pull head is arranged at one end of the pulling piece, the pull head is fixedly connected onto the inner wall of the sliding column, the other end of the pull head sequentially penetrates through the sliding column, the spring, the fixed column and the fixed block to be parallel to the first connecting pipe fixedly connected onto the fixed pulling head group, and when the fixed pulling head group rotates, the pulling piece is pulled towards the fixed pulling head group direction and drives the sliding column to move towards the fixed pulling head group direction along the sliding groove, and the engaged cam pipe is separated from the clutch sleeve.
3. A semi-automatic portable four-wheel ganged folding cart as set forth in claim 1, wherein: the outer side of the upper part of the first linkage block is provided with a first linkage tooth, the outer side of the upper part of the second linkage block is provided with a second linkage tooth, the first linkage tooth is perpendicular to the second linkage tooth and is in meshed connection with the second linkage tooth, when the first linkage tooth rotates, the second linkage gear is driven to rotate, and the rotating direction of the first linkage tooth is perpendicular to the rotating direction of the second linkage tooth.
4. A semi-automatic portable four-wheeled ganged folding cart as set forth in claim 1, wherein: the semi-automatic portable four-wheel linkage folding small trailer is characterized in that a pull rod clamp corresponding to the telescopic pull rod is further arranged on the semi-automatic portable four-wheel linkage folding small trailer, the pull rod clamp is fixedly connected to one side of the top of the baffle frame, and the telescopic pull rod is clamped on the pull rod clamp.
5. A semi-automatic portable four-wheel ganged folding cart as set forth in claim 1, wherein: the semi-automatic portable four-wheel linkage folding small trailer is further provided with a lap joint buckle, and the lap joint buckle is in a hook shape and is fixedly connected under the telescopic pull rod.
6. A semi-automatic portable four-wheel ganged folding cart as set forth in claim 2, wherein: the pulling piece is a pulling piece or a pull rope or a pull rod.
7. A semi-automatic portable four-wheel ganged folding cart as set forth in claim 1, wherein: the limiting block is plate-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711453969.4A CN109969237B (en) | 2017-12-28 | 2017-12-28 | Semi-automatic portable four-wheel linkage folding small trailer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711453969.4A CN109969237B (en) | 2017-12-28 | 2017-12-28 | Semi-automatic portable four-wheel linkage folding small trailer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109969237A CN109969237A (en) | 2019-07-05 |
| CN109969237B true CN109969237B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711453969.4A Active CN109969237B (en) | 2017-12-28 | 2017-12-28 | Semi-automatic portable four-wheel linkage folding small trailer |
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| CN (1) | CN109969237B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111137342B (en) * | 2020-01-07 | 2021-11-19 | 珠海世锠金属有限公司 | Improved multifunctional folding cart |
| CN210478742U (en) * | 2019-07-15 | 2020-05-08 | 闵航 | Folding tool vehicle |
| CN110576891B (en) * | 2019-09-12 | 2024-05-24 | 金华市亚虎工具有限公司 | Three-in-one cart |
| CN110606115A (en) * | 2019-10-24 | 2019-12-24 | 刘三国 | Folding travel trailer |
| CN111137344A (en) * | 2020-03-24 | 2020-05-12 | 广东顺和工业有限公司 | Flat car with foldable caster unit |
| CN113386832B (en) * | 2021-06-16 | 2022-09-27 | 上海西曼检验检测有限公司 | Flat car |
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| CN109969237A (en) | 2019-07-05 |
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