Hand lever limiting device of trailer

Abstract

A matching seat (3) is arranged at the lower end of a hand lever (1), a fixing seat (2) is provided with a matching groove (4) facing the matching seat (3), the matching seat (3) is rotatably connected with the matching groove (4), and a limiting protrusion (5) and a limiting groove (6) are arranged between the matching seat (3) and the matching groove (4), or the matching seat (3) is provided with the matching groove (4) facing the fixing seat (2). The limiting protrusion (5) and the limiting groove (6) can be elastically matched with each other or separated from each other to form a first vertical limiting state and a second traction position state. The hand lever limiting device is beneficial to greatly simplifying the structure and operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to trailer technical field, specifically is a kind of hand lever limiting device of trailer. BACKGROUND

[0002] For example, in outdoor leisure activities, small trailer used as load is very important use tool, in order to facilitate use, usually provided with hand lever, and user pulls small trailer by hand lever.

[0003] In prior art, hand lever usually adopts spring connection to realize gear function, for example, the technical scheme disclosed by a kind of marbles pull rod mechanism with publication number CN206984094U, the marbles pull rod mechanism includes handle, upper pull rod, lower pull rod, telescopic mechanism, button, gear adjusting mechanism and pull rod seat, the upper end of the upper pull rod is fixedly connected with the handle, the lower end of the upper pull rod is installed in the lower pull rod through telescopic mechanism and can be telescoped up and down, the lower end of the lower pull rod is installed on the pull rod seat through pull rod head;The telescopic mechanism includes jack, shift fork, top post and V-shaped double-head marble, the jack is located in the upper pull rod, the upper end of the jack is connected with button, the lower end of the jack is fixed with shift fork, the V-shaped double-head marble is fixed at the bottom of the shift fork from bottom to top through top post, and the two marbles of the V-shaped double-head marble respectively extend the upper pull rod to left and right sides;The gear adjusting mechanism includes gear seat, gear spring and positioning bolt, and the upper part of the pull rod head is fixedly connected with the lower end of the lower pull rod.Turn the pull rod, and the pull rod head connected with the lower pull rod drives the gear spring in it and the gear seat at both ends to rotate around the positioning bolt.And because the pull rod seat is fixed on the lower crossbeam of vehicle frame and cannot rotate, so the limiting protrusion on the gear seat enters different gear recesses in the pull rod head with rotation, so that the pull rod stays in different rotating positions.

[0004] From the above, the structure is relatively complex, and the operation is troublesome, the present applicant proposes a kind of hand lever limiting device of trailer, it is favorable to greatly simplify structure and operation. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems, overcome the defects of prior art, provide a kind of hand lever limiting device of trailer, it is favorable to greatly simplify structure and operation.

[0006] In order to solve the above technical problems, the utility model provides a hand pull rod limiting device of trailer, including hand pull rod and with the fixed seat of trailer's car body connection, the lower extreme of hand pull rod is equipped with cooperation seat, the fixed seat is equipped with the cooperation groove who sets up to cooperation seat, cooperation seat with this cooperation groove can rotatable connection, and cooperation seat with this cooperation groove between being equipped with limit protruding and limit groove, limit protruding sets up in the bottom surface of cooperation groove, limit groove sets up in the circumference of cooperation seat, or limit groove sets up in the bottom surface of cooperation groove, limit protruding sets up in the circumference of cooperation seat.

[0007] Or, the lower end of the hand pull rod is provided with a cooperation seat, the cooperation seat is provided with a cooperation groove facing the fixed seat, the fixed seat and the cooperation groove are rotatably connected, and the fixed seat and the cooperation groove are provided with a limit protrusion and a limit groove between them, the limit protrusion is arranged on the bottom surface of the cooperation groove, the limit groove is arranged on the circumference of the fixed seat, or the limit groove is arranged on the bottom surface of the cooperation groove, and the limit protrusion is arranged on the circumference of the fixed seat.

[0008] The limit protrusion and the limit groove can be elastically matched / separated to form a first vertical limiting state and a second traction position state.

[0009] As an improvement, the limit groove includes a first limit groove and a second limit groove, the first limit groove is elastically matched with the limit protrusion to form the first vertical limiting state, the first limit groove is a non- swingable limit groove, and the second limit groove is matched with the limit protrusion to form the second swingable traction state, and the second limit groove is a swingable limit groove.

[0010] As an improvement, the swingable limit groove is sequentially provided with a first limit end and a second limit end along the circumference of the cooperation seat, when the limit protrusion is matched with the first limit end, the hand pull rod is in a high position state of traction, when the limit protrusion is matched with the second limit end, the hand pull rod is in a low position state of traction, and when the limit protrusion is located between the first limit end and the second limit end, the hand pull rod is in a swing state between the high position state and the low position state of traction.

[0011] As an improvement, the cross section of the swingable limit groove is a fan-shaped groove or an arc-shaped groove, and the cross section of the non-swingable limit groove is V-shaped, semi-arc-shaped or tooth-shaped.

[0012] As an improvement, the limit protrusion is a long strip or a hemisphere in the axial direction, and the cross section is V-shaped, semi-arc-shaped or tooth-shaped.

[0013] As an improvement, the limit protrusion is arranged on the bottom surface of the cooperation groove along the inner circumference of the cooperation groove, and the cooperation groove is further provided with a strip-shaped slot hole on both sides of the axial direction of the limit protrusion to make the limit protrusion constitute a bridge-shaped part which can be elastically moved up and down, or the cooperation groove is provided with a semi-enclosed slot hole around the limit protrusion to make the limit protrusion constitute a one-sided integrated swingable suspension part.

[0014] Alternatively, the limiting protrusion is a spring, and the spring is arranged on the bottom surface of the matching groove.

[0015] As an improvement, the fixing seat and / or the matching seat are made of high-elasticity and high-hardness engineering plastic.

[0016] As an improvement, the fixing seat and / or the matching seat are made of metal material, and a cylinder or a ball is arranged in the part where the spring is arranged, and an elastic body is arranged to cooperate with the cylinder or the ball to form the spring.

[0017] As an improvement, the matching seat or the fixing seat is provided with an opening, and two inner side walls of the opening are respectively provided with an axle hole, and the two axle holes are provided with two elastic pin shafts, the matching seat or the fixing seat provided with the two elastic pin shafts is defined as a quick release and assembly part, and the matching groove is connected with the quick release and assembly part in quick release / quick assembly.

[0018] The two elastic pin shafts are respectively arranged in the axle holes on the respective inner side walls through the opening, and outer ends of the elastic pin shafts are respectively provided with a conical part or a hemispherical part, the conical part or the hemispherical part is used to insert the protruding parts of the two elastic pin shafts into the axle holes, when disassembly is needed, the conical part or the hemispherical part is used to push back the protruding parts to make the two elastic pin shafts be able to be pulled out of the axle holes of the matching groove, inner ends of the two elastic pin shafts are provided with a cap part, and a recess or a protrusion for fixing an elastic member is arranged in the inner side center of the cap part, the elastic member is arranged between the two recesses or protrusions, and an elastic supporting force is provided, the elastic supporting force makes the two elastic pin shafts protrude to form the protruding parts towards the respective outer side surfaces, and the protruding parts can be retracted into the axle holes by overcoming the elastic supporting force.

[0019] When quick assembly is needed, the protruding parts are retracted by overcoming the elastic supporting force, and then the quick release and assembly part can be inserted into the matching groove, and when the two elastic pin shafts are aligned with the respective corresponding axle holes, the protruding parts are re-protruded to be inserted into the corresponding axle holes, so that the quick assembly is realized.

[0020] When quick disassembly is needed, the protruding parts are retracted into the axle holes by overcoming the elastic supporting force, so that the two elastic pin shafts are disengaged from the respective corresponding axle holes, and then the quick release and assembly part can be pulled out of the matching groove, so that the quick disassembly is completed.

[0021] As an improvement, both side walls of the matching groove are provided with a guide groove arranged towards the axle hole, and the guide groove is used to push back the protruding parts to make the two elastic pin shafts be inserted into the axle holes.

[0022] As an improvement, the opening is provided with a protective plug, which is an elastic material body or a plastic material body, and a limiting structure is arranged between the protective plug and at least one of the two inner side walls of the opening, and the limiting structure is used to control the movement of the protective plug in and out of the opening when the protective plug is installed in the opening.

[0023] As an improvement, the limiting structure comprises a limiting protrusion or a hook, the limiting protrusion is provided with a positioning hole, and the limiting protrusion and the positioning hole are elastically matched or elastically disengaged; or the hook is provided with a positioning hole, and the hook and the positioning hole are elastically matched or elastically disengaged.

[0024] As an improvement, in the second traction position state, an angle limiting structure is formed between the lower end of the hand lever and the upper part of the front side of the fixed seat, and the angle limiting structure is used to limit the lowest position of the traction of the hand lever.

[0025] As an improvement, a screw or a rivet is arranged between the matching seat and the fixed seat, the screw or the rivet penetrates from one side of the matching groove to the other side of the matching groove, and the matching seat and the fixed seat are rotatably connected together by a nut or riveting on the other side of the matching groove.

[0026] After the above structure is adopted, compared with the prior art, the utility model has the following advantages: through the structural design, the matching seat is rotatably connected with the matching groove, and the limiting protrusion and the limiting groove are arranged between the matching seat and the matching groove, or the fixed seat is rotatably connected with the matching groove, and the limiting protrusion and the limiting groove are arranged between the fixed seat and the matching groove, further, the limiting protrusion and the limiting groove can be elastically matched / separated from each other to form a first vertical limiting state and a second traction position state, the first vertical limiting state is that the hand lever is positioned at a position through the elastic matching of the limiting protrusion and the limiting groove, and the second traction position state is that the limiting protrusion and the limiting groove are separated from each other, and since they are in a separated state, the lower end of the hand lever and the fixed seat can be relatively swung by the rotatable connection, so as to form a traction position state.

[0027] As can be seen from the above, the utility model realizes the switching of the two states without using a spring, and the structure is relatively simple, and when the user uses it, the user only needs to pull the hand lever to rotate to overcome the elastic force to switch the two states, and the operation is convenient, therefore, the utility model is favorable for greatly simplifying the structure and the operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a perspective view of a hand lever limiting device of a trailer of the utility model.

[0029] Figure 2 It is a front view of a hand lever limiting device of a trailer of the utility model.

[0030] Figure 3 Figure 1 is a left view of a hand lever limiting device for a trailer according to the present disclosure.

[0031] Figure 4 Figure 2 is a cross-sectional view along the A-A direction.

[0032] Figure 5 Figure 3 is an assembly view of Example One from a front perspective.

[0033] Figure 6 Figure 4 is an assembly view of Example One from a rear perspective.

[0034] Figure 7 Figure 5 is a cross-sectional view of Example One in a first vertical limiting state.

[0035] Figure 8 Figure 6 is a cross-sectional view of Example One in a second towing position state and in a high position state.

[0036] Figure 9 Figure 7 is a cross-sectional view of Example One in a second towing position state and in a low position state.

[0037] Figure 10 Figure 8 is an assembly view of Example Two from a front perspective.

[0038] Figure 11 Figure 9 is an assembly view of Example Three from a front perspective.

[0039] Figure 12 Figure 10 is an assembly view of Example Four from a front perspective.

[0040] Figure 13 Figure 11 is an assembly view of Example Four from a rear perspective.

[0041] Figure 14 Figure 12 is an assembly view of Example Five from a front perspective.

[0042] Figure 15 Figure 13 is an assembly view of Example Five from a rear perspective.

[0043] Figure 16 Figure 14 is a cross-sectional view of Example Five in a first vertical limiting state.

[0044] Figure 17 Figure 15 is a cross-sectional view of Example Five in a second towing position state and in a high position state.

[0045] Figure 18 Figure 16 is a cross-sectional view of Example Five in a second towing position state and in a low position state.

[0046] Figure 19This is a cross-sectional schematic diagram of Embodiment Six in the first vertical limiting state.

[0047] Figure 20 This is a cross-sectional schematic diagram of Embodiment 6, showing the second traction position and the high position.

[0048] Figure 21 This is a cross-sectional schematic diagram of Embodiment Six, showing the second traction position and the low position.

[0049] Figure 22 This is the front view of Example 7.

[0050] Figure 23 This is a three-dimensional schematic diagram of Example 7 from a rear view.

[0051] Figure 24 This is a sectional view along the BB direction.

[0052] Figure 25 This is a schematic diagram of the assembly from the front view of Embodiment 7.

[0053] Figure 26 This is a schematic diagram of the assembly from the rear view of Embodiment 7.

[0054] Figure 27 This is the front view of Example 8.

[0055] Figure 28 This is a three-dimensional schematic diagram of Example 8 from a rear-view perspective.

[0056] Figure 29 This is a sectional view along the CC direction.

[0057] Figure 30 This is an assembly diagram of Example 8 from a frontal view.

[0058] Figure 31 This is a schematic diagram of the assembly from the rear view of Example 8.

[0059] Figure 32 This is a schematic diagram of an assembly using hooks and buckles.

[0060] Figure 33 This is the front view using a straight handle.

[0061] Figure 34 for Figure 33 A sectional view along the DD direction.

[0062] Figure 35 This is an assembly diagram of a straight handle from the front view.

[0063] Figure 36 This is an assembly diagram of a straight handle from the rear view.

[0064] Figure 37 is a front view of the straight handle and the matching groove is arranged on one side of the matching seat.

[0065] Figure 38 is a sectional view of the E-E direction. Figure 37

[0066] Figure 39 is an assembly schematic view of the straight handle and the matching groove is arranged on one side of the matching seat and the limiting groove is shown.

[0067] Figure 40 is an assembly schematic view of the straight handle and the matching groove is arranged on one side of the matching seat and the limiting protrusion is shown.

[0068] As shown in the figure, 1 is a hand lever, 2 is a fixed seat, 3 is a matching seat, 4 is a matching groove, 5 is a limiting protrusion, 6 is a limiting groove, 7 is a first limiting groove, 8 is a second limiting groove, 9 is a first limiting end, 10 is a second limiting end, 11 is a strip-shaped slot hole, 12 is a half-enclosed slot hole, 13 is a ball, 14 is an elastic body, 15 is an opening, 16 is a shaft hole, 17 is a spring pin shaft, 18 is a cap part, 19 is an elastic piece, 20 is an extension part, 21 is an introduction groove, 22 is a protective plug, 23 is a hook, 24 is a positioning hole, 25 is a front upper part, 26 is a rivet, 27 is a handle part, 28 is a straight part, 29 is a bent part, 30 is a limiting protruding part, and 31 is an empty space. DETAILED DESCRIPTION

[0069] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The examples in the following description are only as examples, and other obvious modifications can be thought of by those skilled in the art. The basic principles of the utility model defined in the following description can be applied to other implementation schemes, modification schemes, improvement schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0070] Those skilled in the art should understand that in the disclosure of the utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above-mentioned terms cannot be understood as a limitation on the utility model.

[0071] ​It is to be understood that the terms "one" and "a" are open-ended and are intended to mean "at least one" or "one or more", that is, there can be one or more than one of the elements named. The terms "first", "second", "third", etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

[0072] As Figures 1 to 40 The utility model discloses a kind of hand lever limiting devices of trailer, including hand lever 1 and the fixed seat 2 being connected with the vehicle body of trailer, first, the lower end of hand lever 1 is equipped with cooperation seat 3, fixed seat 2 is equipped with the cooperation groove 4 being set to cooperation seat 3, cooperation seat 3 is rotatably connected with the cooperation groove 4, and limit protrusion 5 and limit groove 6 are equipped between cooperation seat 3 and the cooperation groove 4, the limit protrusion 5 is set to the bottom surface of cooperation groove 4, the limit groove 6 is set to the circumferential direction of cooperation seat 3, or the limit groove 6 is set to the bottom surface of cooperation groove 4, the limit protrusion 5 is set to the circumferential direction of cooperation seat 3.

[0073] Or, second, the lower end of hand lever 1 is equipped with cooperation seat 3, cooperation seat 3 is equipped with the cooperation groove 4 being set to fixed seat 2, fixed seat 2 is rotatably connected with the cooperation groove 4, and limit protrusion 5 and limit groove 6 are equipped between fixed seat 2 and cooperation groove 4, the limit protrusion 5 is set to the bottom surface of cooperation groove 4, the limit groove 6 is set to the circumferential direction of fixed seat 2, or the limit groove 6 is set to the bottom surface of cooperation groove 4, the limit protrusion 5 is set to the circumferential direction of fixed seat 2.

[0074] In first and second, the limit protrusion 5, limit groove 6 can be mutually elastic cooperation / separation and form first vertical limiting state and second traction position state.

[0075] The first case in first, as shown in Figure 4 、 5 , 6, the lower end of hand lever 1 is equipped with cooperation seat 3, fixed seat 2 is equipped with the cooperation groove 4 being set to cooperation seat 3, cooperation seat 3 is rotatably connected with the cooperation groove 4, and limit protrusion 5 and limit groove 6 are equipped between cooperation seat 3 and the cooperation groove 4, the limit protrusion 5 is set to the bottom surface of cooperation groove 4, the limit groove 6 is set to the circumferential direction of cooperation seat 3.

[0076] The second case in first, as shown in Figure 14 、 15 , 16, 17, 18, the limit groove 6 is set to the bottom surface of cooperation groove 4, the limit protrusion 5 is set to the circumferential direction of cooperation seat 3.

[0077] The first case in second, as shown in Figure 22 、 23, 24, 25, 26, the lower end of the hand-pull rod 1 is provided with a matching seat 3, the matching seat 3 is provided with a matching groove 4 facing the fixing seat 2, the fixing seat 2 is rotatably connected with the matching groove 4, and the fixing seat 2 and the matching groove 4 are provided with a limiting protrusion 5 and a limiting groove 6, the limiting protrusion 5 is arranged on the bottom surface of the matching groove 4, and the limiting groove 6 is arranged on the circumferential direction of the fixing seat 2.

[0078] The second case in the second type is as shown in Figure 33 、 34 , 35, 36, the limiting groove 6 is arranged on the bottom surface of the matching groove 4, and the limiting protrusion 5 is arranged on the circumferential direction of the fixing seat 2.

[0079] The elastic cooperation between the first limiting groove 7 and the limiting protrusion 5 can be that the first limiting groove 7 is elastic, for example as shown in Figure 27 、 28 , 29, 30, 31, or the limiting protrusion 5 is elastic, for example as shown in Figure 5 、 10 .

[0080] In some embodiments, in order to simplify the structure and improve the reliability, the limiting protrusion 5 and the limiting groove 6 can be elastically cooperated / separated with each other, as shown in Figure 5 , the matching groove 4 is further provided with a strip-shaped slot hole 11 on both sides of the axial direction of the limiting protrusion 5 to make the limiting protrusion 5 form a bridge-shaped part which can be elastically moved up and down, or as shown in Figure 10 、 14 , 15, the matching groove 4 is provided with a half-enclosed slot hole 12 around the limiting protrusion 5 to make the limiting protrusion 5 form a single-sided integrated suspension part which can be elastically swung.

[0081] Of course, the limiting protrusion 5 and the limiting groove 6 can also be other structures which can be elastically cooperated / separated with each other, for example as shown in Figure 23 、 24 , as shown in Figure 29 、 30 , 31, etc.

[0082] As shown in Figure 27 、 28 , 29, 30, 31, the limiting protrusion 5 is arranged on the bottom surface of the matching groove 4 and does not have elasticity, and the limiting groove 6 is arranged on the circumferential direction of the fixing seat 2 and has elasticity.

[0083] In this example, as shown in Figure 29 、 30 , the limiting groove 6 is provided with a deformation ability by arranging the part corresponding to the limiting groove 6 on the circumferential direction of the fixing seat 2 as a space 31.

[0084] In order to realize the elastic cooperation / separation of the limiting protrusion 5 and the limiting groove 6, improve the durability and reliability, preferably, the fixing base 2 and / or the cooperation base 3 are made of high-elasticity and high-hardness engineering plastics. The high-elasticity and high-hardness engineering plastics are, for example, polyoxymethylene (POM), polycarbonate (PC) or polyether ether ketone (PEEK).

[0085] In some embodiments, the limiting protrusion 5 is a spring top, and the spring top is arranged on the bottom surface of the cooperation groove 4.

[0086] Further, as shown in Figure 12 、 13 , a cylinder or a ball 13 is arranged in the part where the spring top is arranged, and an elastic body 14 is arranged to cooperate with the cylinder or the ball 13 to form the spring top, and the fixing base 2 and / or the cooperation base 3 are made of metal materials, so that the spring top is more firmly arranged and durable, and thus the reliability is improved during repeated use.

[0087] In some embodiments, as shown in Figure 6 、 7 , 8, 9, the limiting groove 6 includes a first limiting groove 7 and a second limiting groove 8. The first limiting groove 7 cooperates with the limiting protrusion 5 to form a first vertical limiting state, and the first limiting groove 7 is a non- swingable limiting groove. The second limiting groove 8 cooperates with the limiting protrusion 5 to form a second traction swingable state, and the second limiting groove 8 is a swingable limiting groove.

[0088] The cross section of the swingable limiting groove is a fan-shaped groove or an arc-shaped groove, and the cross section of the non-swingable limiting groove is a V-shaped groove, a semi-arc-shaped groove or a tooth-shaped groove.

[0089] Further, as shown in Figure 6 、 7 , 8, 9, the swingable limiting groove is sequentially provided with a first limiting end 9 and a second limiting end 10 along the circumference of the cooperation base 3. When the limiting protrusion 5 cooperates with the first limiting end 9, the hand lever 1 is in a high position state of traction. When the limiting protrusion 5 cooperates with the second limiting end 10, the hand lever 1 is in a low position state of traction. When the limiting protrusion 5 is located between the first limiting end 9 and the second limiting end 10, the hand lever 1 is in a swing state between the high position state and the low position state of traction.

[0090] The structure of the high position state and the low position state can also be other structures, for example, as shown in Figure 19 、 20 , 21, an angle limiting structure is formed between the lower end of the hand lever 1 and the upper part 25 of the front side of the fixing base 2 in the second traction position state, and the angle limiting structure is used to limit the lowest position of the hand lever 1 in traction. In this way, the second limiting groove 8 is omitted, and only the first limiting groove 7 needs to be arranged.

[0091] AsFigure 7 、 8 , 9, when the second traction position state needs to be switched to the first vertical limiting state, the hand lever 1 is in the high position state of traction, and the hand lever 1 is further rotated, so as to overcome the obstruction of the first limiting end 9 to make the first limiting groove 7 and the limiting protrusion 5 re-couple, which is the use mode of mutual switching of the first vertical limiting state and the second traction position state of the present disclosure, which is significantly different from the adjustment scheme composed of a series of structures such as springs in the prior art, and has a significant progress in the field of trailers.

[0092] In some embodiments, as shown in Figures 33 to 40 , the upper part of the matching seat 3 is provided with a handle 27, the straight handle is fixedly connected with the lower end of the hand lever 1, and the lower end of the straight handle serves as the matching seat 3.

[0093] Further, as shown in Figure 34 , 38 , when the hand lever 1 is in the first vertical limiting state, the limiting protrusion 5 and the first limiting groove 7 are coupled with each other and located on the axis of the hand lever 1, and the front and rear sides of the handle 27 can be used as the second traction position state, which has the advantages that the straight handle scheme can not be divided into front and rear directions, is easy to identify, and is convenient to assemble.

[0094] Further, as shown in Figure 38 , the first limiting groove 7 is provided with a second limiting groove 8 on each side, so that the assembly can not be divided into front and rear directions, which is beneficial to assembly.

[0095] When the handle 27 is a bent handle, as shown in Figure 12 , 13 , 14, 15, the bent handle includes a straight part 28 and a bent part 29, the straight part 28 is connected with the lower end of the hand lever 1, and the bent part 29 is arranged opposite to the front side of the hand lever 1, and the bent part 29 serves as the matching seat 3. In this way, it has a certain ergonomics effect, and in addition: 1) the bent handle is arranged forward relative to the fixed seat 2, which can realize that the hand lever 1 is parallel to the angle upright column (for example, two vertical side rods of the mouth-shaped front frame) on the front side of the frame in the first vertical limiting state, and also can make the upper part of the hand lever 1 can abut against the cross support pipe of the mouth-shaped front frame, which has the visual beauty of the hand lever 1 and the front frame being coordinated and parallel. 2) when the hand lever 1 is quickly disassembled, it is beneficial to realize that the front end face of the fixed seat 2 does not exceed the lower cross support pipe of the front side of the frame too much, and ensures that the size of the frame is small after folding.

[0096] In some embodiments, as shown in Figure 11 , 35Screw or rivet 26 is arranged between cooperating seat 3 and fixing seat 2, and is arranged from one side of cooperating groove 4 to the other side of cooperating groove 4, and is rotatably connected with cooperating seat 3 and fixing seat 2 by nut or riveting on the other side of cooperating groove 4. In this way, the structure is simple and the connection is reliable.

[0097] In some embodiments, as shown in Figure 5 , 6 , 10, 11, 12, 13, 14, 15, etc., the cooperating seat 3 or the fixing seat 2 is provided with an opening 15. In this example, the cooperating seat 3 is provided with an opening 15, and when the fixing seat 2 is provided with an opening 15, the fixing seat 2 shown in Figure 35 , 36 is provided with an opening 15, thereby replacing the screw or rivet 26 shown in Figure 35 , 36 .

[0098] The two inner side walls of opening 15 are each provided with an axle hole 16, and the two axle holes 16 are provided with two elastic pin axles 17. The cooperating seat 3 or the fixing seat 2 provided with two elastic pin axles 17 is defined as a quick release and assembly part, and the cooperating groove 4 is connected with the quick release and assembly part for quick release / quick assembly.

[0099] The two elastic pin axles 17 are respectively installed in the axle hole 16 on the respective inner side wall from the inside to the outside through the opening 15. The outer end of the elastic pin axle 17 is respectively provided with a conical part or a hemispherical part, which is used to insert the protruding part 20 of the two elastic pin axles 17 into the axle hole 16. When disassembly is needed, the conical part or the hemispherical part is used to push back the protruding part 20 so that the two elastic pin axles 17 can be pulled out of the axle hole 16 of the cooperating groove 4. The inner end of the two elastic pin axles 17 is provided with a cap part 18, and the inner side center of the cap part 18 is provided with a recess or a protrusion for fixing an elastic member 19. The elastic member 19 is arranged between the two recesses or protrusions and provides an elastic support force, which makes the two elastic pin axles 17 protrude outward to form a protruding part 20, and at the same time, the elastic support force can be overcome to make the protruding part 20 retract into the axle hole 16.

[0100] When quick assembly is needed, the elastic support force is first overcome to make the protruding part 20 retract, so that the quick release and assembly part can be inserted into the cooperating groove 4, and when the two elastic pin axles 17 are aligned with the respective corresponding axle holes 16, the protruding part 20 is re-protruded to be inserted and fitted into the corresponding axle hole 16, thereby realizing quick assembly.

[0101] When quick disassembly is needed, firstly overcome the elastic support force to make the extension part 20 retract into the shaft hole 16, so that the two elastic pin shafts 17 are disengaged from the respective corresponding shaft holes 16, and then the quick disassembly part can be pulled out of the matching groove 4, thereby completing the quick disassembly.

[0102] Compared with the screw or rivet 26, the above structure can realize quick disassembly and folding, packaging and transportation after quick disassembly.

[0103] Further, as shown in Figure 5 、 6 The two side walls of the matching groove 4 are provided with a guide groove 21 facing the shaft hole 16, which is used to push back the extension part 20 so that the two elastic pin shafts 17 can be inserted into the shaft hole 16. In this way, it is more convenient to realize quick disassembly and assembly.

[0104] In some embodiments, as shown in Figure 5 、 6 The opening 15 is provided with a protective plug 22, which is a body of elastic material such as rubber or silicone, or a body of plastic material such as elastic plastic. The protective plug 22 is provided with a limiting structure between at least one side of the two inner side walls of the opening 15 and the protective plug 22. When the protective plug 22 is installed in the opening 15, the limiting structure is used to control the movement of the protective plug 22 inside and outside. In this way, since the inner end of the two elastic pin shafts 17 is provided with a cap part 18, the inner side center of the cap part 18 is provided with a recess or protrusion for fixing the elastic member 19, and the elastic member 19 is arranged between the two recesses or protrusions and provides an elastic support force, so that the protective plug 22 plays a protective role on the one hand, protecting the structures installed in the opening 15, and more importantly, by installing the protective plug 22, the elastic member 19 is first installed between the two cap parts 18, and then the protective plug 22 is installed to complete the installation, thereby achieving the purpose of more convenient and efficient assembly. Under the radial limitation of the protective plug 22, the elastic member 19 is not easy to come out of the opening 15, and further, the inner side center of the cap part 18 is provided with a recess or protrusion for fixing the elastic member 19, which can better arrange the elastic member 19 between the two cap parts 18 and not easy to come out of the opening 15.

[0105] Further, as shown in Figure 5 The limiting structure includes a limiting protrusion 30, which is matched with a positioning hole 24. The elastic or plastic of the protective plug 22 makes the limiting protrusion 30 and the positioning hole 24 elastically cooperate or elastically disengage.

[0106] It can also be other structures, for example, as shown in Figure 32As shown, the limiting structure includes a hook 23, which is arranged in a position hole 24 in a matched manner, and the elastic or plastic of the hook 23 is used to make elastic cooperation or elastic disengagement between the hook 23 and the position hole 24.

[0107] In understanding the present application, if necessary, the above structure can refer to other embodiments / appendices Figure 1 And it is understood that here is not redundant.

[0108] The above is only an optional specific embodiment of the present application, and equivalent changes or modifications made to the structure, features and principles described in the patent application range of the present application are included in the patent application range of the present application.

Claims

1. A hand lever limiting device for a trailer, comprising a hand lever (1) and a fixing seat (2) connected with a vehicle body of the trailer, characterized in that, The lower end of the hand pull rod (1) is provided with a matching seat (3), the fixed seat (2) is provided with a matching groove (4) facing the matching seat (3), the matching seat (3) and the matching groove (4) are rotatably connected, and a limiting protrusion (5) and a limiting groove (6) are arranged between the matching seat (3) and the matching groove (4), the limiting protrusion (5) is arranged on the bottom surface of the matching groove (4), and the limiting groove (6) is arranged on the circumference of the matching seat (3), or the limiting groove (6) is arranged on the bottom surface of the matching groove (4), and the limiting protrusion (5) is arranged on the circumference of the matching seat (3). Alternatively, the lower end of the hand pull rod (1) is provided with a matching seat (3), the matching seat (3) is provided with a matching groove (4) facing the fixed seat (2), the fixed seat (2) and the matching groove (4) are rotatably connected, and a limiting protrusion (5) and a limiting groove (6) are arranged between the fixed seat (2) and the matching groove (4), the limiting protrusion (5) is arranged on the bottom surface of the matching groove (4), and the limiting groove (6) is arranged on the circumference of the fixed seat (2), or the limiting groove (6) is arranged on the bottom surface of the matching groove (4), and the limiting protrusion (5) is arranged on the circumference of the fixed seat (2). The limiting protrusion (5) and the limiting groove (6) can be elastically matched / separated to form a first vertical limiting state and a second traction position state.

2. The hand lever stop for a trailer of claim 1, wherein, The limiting groove (6) includes a first limiting groove (7) and a second limiting groove (8), the first limiting groove (7) is elastically matched with the limiting protrusion (5) to form the first vertical limiting state, the first limiting groove (7) is a non- swingable limiting groove, the second limiting groove (8) is matched with the limiting protrusion (5) to form a second swingable traction state, and the second limiting groove (8) is a swingable limiting groove.

3. The hand lever stop for a trailer as defined in claim 2, wherein, The swingable limiting groove is sequentially provided with a first limiting end (9) and a second limiting end (10) along the circumference of the matching seat (3), when the limiting protrusion (5) is matched with the first limiting end (9), the hand pull rod (1) is in a high position state of traction, when the limiting protrusion (5) is matched with the second limiting end (10), the hand pull rod (1) is in a low position state of traction, and when the limiting protrusion (5) is located between the first limiting end (9) and the second limiting end (10), the hand pull rod (1) is in a swing state between the high position and the low position of traction.

4. The hand lever stop for a trailer of claim 2, wherein, The cross section of the swingable limiting groove is a fan-shaped groove or an arc-shaped groove, and the cross section of the non-swingable limiting groove is a V-shaped, semi-arc-shaped or tooth-shaped groove.

5. The hand lever stop for a trailer as set forth in claim 1, or claim 2, or claim 3, or claim 4, wherein, The limiting protrusion (5) is a long strip or a hemisphere along the axial direction, and the cross section is a V-shaped, semi-arc-shaped or tooth-shaped groove.

6. The hand lever stop for a trailer as set forth in claim 1, or claim 2, or claim 3, or claim 4, wherein, The limiting protrusion (5) is arranged on the bottom surface of the matching groove (4) along the inner circumferential direction of the matching groove (4), and strip-shaped groove holes (11) are arranged on both sides of the limiting protrusion (5) in the axial direction to form a bridge-shaped part that can be elastically moved up and down, or semi-enclosed groove holes (12) are arranged around the limiting protrusion (5) to form a one-sided integrated swingable suspension part of the limiting protrusion (5); Alternatively, the limiting protrusion (5) is a spring top, and the spring top is arranged on the bottom surface of the matching groove (4).

7. The hand pull stop of a trailer as defined in claim 1 wherein, The fixed seat (2) and / or the matching seat (3) are made of high-elasticity and high-hardness engineering plastic.

8. The hand lever stop for a trailer of claim 6, wherein, The fixed seat (2) and / or the matching seat (3) are made of metal material, and a cylinder or a ball (13) is elastically arranged on a part of the elastic top, and an elastic body (14) is arranged to cooperate with the cylinder or the ball (13) to form the elastic top.

9. The hand pull stop of a trailer as defined in claim 1 wherein, The matching seat (3) or the fixed seat (2) is provided with an opening (15), and two inner side walls of the opening (15) are provided with shaft holes (16), the two shaft holes (16) are provided with two elastic pin shafts (17), and the matching seat (3) or the fixed seat (2) provided with the two elastic pin shafts (17) is defined as a quick disassembly and assembly part, and the matching groove (4) is connected with the quick disassembly and assembly part in quick disassembly and quick assembly. The two elastic pin shafts (17) are respectively arranged in the shaft holes (16) on the respective inner side walls through the opening (15), and outer ends of the elastic pin shafts (17) are respectively provided with conical parts or hemispherical parts, the conical parts or the hemispherical parts are used to insert the protruding parts (20) of the two elastic pin shafts (17) into the shaft holes (16), when disassembly is needed, the conical parts or the hemispherical parts are used to push back the protruding parts (20) to enable the two elastic pin shafts (17) to be separated from the shaft holes (16) of the matching groove (4), inner ends of the two elastic pin shafts (17) are provided with cap parts (18), inner sides of the cap parts (18) are provided with recesses or protrusions for fixing elastic members (19), the elastic members (19) are arranged between the two recesses or protrusions, and an elastic supporting force is provided, the elastic supporting force enables the two elastic pin shafts (17) to protrude to form the protruding parts (20) on the respective outer side walls, and the elastic supporting force can also be overcome to enable the protruding parts (20) to be retracted into the shaft holes (16). When quick assembly is needed, the elastic supporting force is first overcome to enable the protruding parts (20) to be retracted, and then the quick disassembly and assembly part can be inserted into the matching groove (4), and when the two elastic pin shafts (17) are aligned with the respective corresponding shaft holes (16), the protruding parts (20) are re-protruded to be inserted into the corresponding shaft holes (16), so that the quick assembly is realized. When quick disassembly is needed, the elastic supporting force is first overcome to enable the protruding parts (20) to be retracted into the shaft holes (16), so that the two elastic pin shafts (17) are separated from the respective corresponding shaft holes (16), and then the quick disassembly and assembly part can be pulled out of the matching groove (4), so that the quick disassembly is completed.

10. The hand lever stop for a trailer as defined in claim 9, wherein, Both side walls of the matching groove (4) are provided with guide grooves (21) arranged towards the shaft holes (16), and the guide grooves (21) are used to push back the protruding parts (20) to enable the two elastic pin shafts (17) to be inserted into the shaft holes (16).

11. The hand lever stop for a trailer as defined in claim 9 wherein, A protective plug (22) is arranged in the opening (15), the protective plug (22) is made of an elastic material body or a plastic material body, and a limiting structure is arranged between at least one of the two inner side walls of the opening (15) and the protective plug (22), when the protective plug (22) is arranged in the opening (15), the limiting structure is used to control the movement of the protective plug (22) in and out.

12. The hand lever stop for a trailer as defined in claim 11, wherein, The limiting structure comprises a limiting protrusion (30) or a hook (23); the limiting protrusion (30) is provided with a positioning hole (24) in a matched mode, and the limiting protrusion (30) and the positioning hole (24) are elastically matched or elastically disengaged; or the hook (23) is provided with the positioning hole (24) in a matched mode, and the hook (23) and the positioning hole (24) are elastically matched or elastically disengaged.

13. The hand pull stop of a trailer as defined in claim 1 wherein, In the second traction position state, an angle limiting structure is formed between the lower end of the hand pull rod (1) and the front upper portion (25) of the fixed base (2), and the angle limiting structure is used for limiting the lowest position of the traction of the hand pull rod (1).

14. The hand pull stop of a trailer as defined in claim 1 wherein, Screws or rivets (26) are arranged between the matching seat (3) and the fixed base (2), the screws or rivets (26) pass from one side of the matching groove (4) to the other side of the matching groove (4) inwards, and the matching seat (3) and the fixed base (2) are rotatably connected together on the other side of the matching groove (4) through nuts or riveting.

15. The hand pull stop of a trailer as defined in claim 1 wherein, The upper portion of the matching seat (3) is provided with a handle portion (27), the handle portion (27) is a straight handle or a bent handle, the upper end of the straight handle is connected with the lower end of the hand pull rod (1), the lower end of the straight handle serves as the matching seat (3), the bent handle comprises a straight portion (28) and a bent portion (29), the straight portion (28) is connected with the lower end of the hand pull rod (1), and the bent portion (29) is arranged opposite to the front side of the hand pull rod (1), and the bent portion (29) serves as the matching seat (3).

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