Lifting machine

Abstract

The utility model provides a lifting machine which comprises an upper end frame, a lower end frame parallel to the upper end frame, a lifting support and a limiting structure. The upper end frame has a first state of unfolding away from the lower end frame and a second state of folding close to the lower end frame; the lifting support is arranged between the upper end frame and the lower end frame and used for pushing the upper end frame to be switched between the first state and the second state. The limiting structure comprises a limiting piece, the limiting piece is provided with a first end and a second end which are located at the two ends of the limiting piece respectively, and the first end is rotationally connected with the lifting support; one side of the second end part opposite to the lower end frame is provided with a limiting hook; the limiting grooves are formed in the lower end frame and are distributed at intervals in the length direction of the lower end frame; in the first state, the limiting hook is connected with the limiting groove in a matched mode, and the upper end frame is limited to be converted from the first state to the second state. The limiting structure arranged on the lifting machine is simple in structure, and the fault probability caused by a complex structure is reduced.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of vehicle maintenance, and in particular to a lift. Background Art

[0002] The vehicle lift is a maintenance device in the vehicle maintenance industry. It is used to lift vehicles to facilitate users to inspect and repair the vehicles.

[0003] Existing lifts are often provided with a safety limit structure, which is used to limit the fall of the lift after the vehicle is lifted to a required height, thereby ensuring the safety of the user.

[0004] The limit structure of the existing lift is complex, often having more than a dozen parts, and the complex structure increases the probability of failure. Utility Model Content

[0005] The embodiment of the utility model provides a lift to solve the problem that the limiting structure of the existing lift is complex and the complex structure increases the probability of failure.

[0006] In order to solve the above technical problems, the utility model is achieved as follows:

[0007] In a first aspect, an embodiment of the utility model provides a lifting machine, comprising: an upper frame, a lower frame parallel to the upper frame, a lifting bracket, and a limiting structure;

[0008] The upper frame has a first state in which it is unfolded away from the lower frame, and a second state in which it is folded close to the lower frame; the lifting bracket is arranged between the upper frame and the lower frame, and is used to push the upper frame to switch between the first state and the second state;

[0009] The limiting structure comprises:

[0010] A limiting member, comprising a first end and a second end respectively located at two ends of the limiting member, wherein the first end is rotatably connected to the lifting bracket; and the second end has a limiting hook on a side opposite to the lower end bracket;

[0011] A plurality of limit grooves are provided on the lower end frame and are arranged at intervals along the length direction of the lower end frame;

[0012] In the first state, the limit hook is cooperatively connected with the limit slot to limit the upper end frame from switching from the first state to the second state.

[0013] Optionally,

[0014] A magnetic member is provided on the other side of the second end away from the lower end frame;

[0015] The limiting structure further includes:

[0016] A retaining member, provided on the lifting bracket;

[0017] During the transition from the first state to the second state, the magnetic member is magnetically attached to the retaining member, and the limiting hook is separated from the limiting groove.

[0018] Optionally,

[0019] The lifting bracket comprises: two side brackets;

[0020] In the first direction, one side bracket is provided between the side edges of the upper end bracket and the lower end bracket on the same side, and another side bracket is provided between the side edges of the other same side;

[0021] Each of the side brackets comprises: a first support rod and a second support rod cross-hinged;

[0022] The lower ends of the two first support rods are rotatably connected to the lower end frame; the lower ends of the two second support rods are rotatably connected to the lower end frame through a first pin shaft; and the lower ends of the two second support rods are relatively slidably arranged on the lower end frame along a second direction through the first pin shaft, and the lower ends of the two second support rods can also slide relative to the lower end frame along the second direction, and the second direction is perpendicular to the first direction;

[0023] The upper ends of the two second support rods are rotatably connected to the upper end frame; the upper ends of the two first support rods are rotatably connected to the upper end frame via a second pin shaft; and, the upper ends of the two first support rods can also slide relative to the upper end frame along the second direction via the second pin shaft that is relatively slidable on the upper end frame along the second direction.

[0024] Optionally,

[0025] The first end is rotatably connected to the second support rod through the first pin.

[0026] Optionally,

[0027] A magnetic member is provided on the other side of the second end portion away from the lower end frame;

[0028] The limiting structure further includes:

[0029] A retaining member, provided on the lifting bracket;

[0030] Between the first state and the second state, the upper end frame also has a first position relative to the lower end frame, and in the first position, the limiting hook is misaligned with each of the limiting grooves;

[0031] During the conversion from the first state to the first position, the magnetic member and the retaining member are magnetically attached, and the limiting hook is disengaged from the limiting groove;

[0032] During the position conversion from the first position to the second state, the magnetic member is separated from the retaining member, and the limiting hook is separated from the limiting groove;

[0033] The lifting machine further comprises:

[0034] The reset structure is used to release the magnetic fit between the magnetic member and the retaining member during the position conversion from the first position to the second state.

[0035] Optionally,

[0036] The reset structure comprises:

[0037] A guide groove, provided on the limiting member and extending along the length direction of the limiting member;

[0038] A third pin is rotatably disposed on the edge of the lower end frame;

[0039] A connecting rod, one end of which is disposed in the guide groove, and can rotate relative to the limiter and slide relative to the limiter along the guide groove; and the other end of the connecting rod is fixedly connected to the third pin shaft;

[0040] A reset member, one end of which is rotatably disposed at the end of the connecting rod connected to the guide groove, and the other end of which is a wedge-shaped end with a tip pointing to the second end;

[0041] During the position transition from the first position to the second state, the wedge-shaped end extends into the gap between the second end and the retaining member.

[0042] Optionally, it also includes:

[0043] An operating rod is fixedly connected to the third pin shaft.

[0044] Optionally, the first end is located between two second support rods in the first direction.

[0045] Optionally,

[0046] The retaining member is arranged between the two second support rods in the first direction.

[0047] Optionally, it also includes:

[0048] The driving oil cylinder comprises: a cylinder body and a telescopic arm slidably and telescopically arranged in the cylinder body;

[0049] The cylinder body is rotatably connected to the lower end frame, and the telescopic arm is rotatably connected to the second support rod.

[0050] The lifting machine of the utility model embodiment comprises: an upper end frame, a lower end frame parallel to the upper end frame, a lifting bracket, and a limiting structure; the upper end frame has a first state in which it is unfolded away from the lower end frame, and a second state in which it is retracted close to the lower end frame; the lifting bracket is arranged between the upper end frame and the lower end frame, and is used to push the upper end frame to switch between the first state and the second state; the limiting structure arranged in the lifting machine of the utility model embodiment comprises: a limiting member, having a first end and a second end respectively located at two ends of the limiting member, the first end being rotatably connected to the lifting bracket; a limiting hook is provided on a side of the second end opposite to the lower end frame; a limiting groove is provided on the lower end frame, and has a plurality of limiting grooves arranged at intervals along the length direction of the lower end frame; in the first state, the limiting hook is cooperatively connected with the limiting groove to limit the upper end frame from switching from the first state to the second state. The limiting structure arranged in the lifting machine of the utility model embodiment has a simple structure, and reduces the probability of failure caused by a complex structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0052] Figure 1 This is a schematic diagram of the parts explosion of the lifting machine according to the embodiment of the utility model;

[0053] Figure 2 It is a three-dimensional schematic diagram of the limit structure in the lifting machine of the embodiment of the utility model;

[0054] Figure 3 This is a schematic diagram of the parts explosion of the limit structure in the lift in the embodiment of the utility model;

[0055] Figure 4 It is a longitudinal cross-sectional schematic diagram of the lifting machine of the utility model embodiment in the first state;

[0056] Figure 5 For the corresponding Figure 4 A partial enlarged schematic diagram of position B in the middle;

[0057] Figure 6 It is a longitudinal cross-sectional schematic diagram of the lifting machine of the utility model embodiment in the second state;

[0058] Figure 7 This is one of the longitudinal cross-sectional diagrams of the lifting machine in the embodiment of the utility model during the transition from the first state to the second state;

[0059] Figure 8 For the corresponding Figure 7A partial enlarged schematic diagram of the C position in the middle;

[0060] Fig. 9 This is the second longitudinal cross-sectional schematic diagram of the lifting machine in the embodiment of the utility model during the transition from the first state to the second state;

[0061] Fig.10 For the corresponding Fig. 9 A partial enlarged schematic diagram of the D position in the middle;

[0062] in:

[0063] 1. Upper rack;

[0064] 2. Lower end frame;

[0065] 3. Lifting bracket; 30. Side bracket; 31. First support rod; 32. Second support rod; 33. First pin shaft; 34. Second pin shaft;

[0066] 4. Limiting structure; 41. Limiting member; 411. Limiting hook; 42. Limiting groove; 43. Retaining member; 44. Magnetic member;

[0067] 5. reset structure; 51. guide groove; 52. third pin shaft; 53. connecting rod; 531. roller; 54. reset member;

[0068] 6. Operating lever;

[0069] 7. Driving cylinder; 71. Cylinder body; 72. Telescopic arm. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0071] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0072] In the technical solution of the present disclosure, words such as “connect”, “couple” or “connected” are not limited to physical or mechanical connections, but may include electrical connections.

[0073] The drawings of the embodiments of the present invention illustrate an xyz spatial rectangular coordinate system, in which the x-axis, y-axis, and z-axis are perpendicular to each other, the first direction is the direction of the x-axis, the second direction is the direction of the y-axis, and the direction of the z-axis is the up and down direction.

[0074] The utility model embodiment provides a lifting machine, see Figures 1 to 6 As shown, it includes: an upper frame 1, a lower frame 2 parallel to the upper frame 1, a lifting bracket 3, a limiting structure 4, and a driving cylinder 7;

[0075] See also Figure 4 As shown, the upper frame 1 has a first state in which it is unfolded away from the lower frame 2; see Figure 6 As shown, the upper frame 1 also has a second state of being folded close to the lower frame 2; the lifting bracket 3 is arranged between the upper frame 1 and the lower frame 2, and is used to push the upper frame 1 to switch between the first state and the second state;

[0076] The limiting structure 4 comprises:

[0077] The limiting member 41 has a first end and a second end respectively located at both ends of the limiting member 41, the first end being rotatably connected to the lifting bracket 3; and the second end having a limiting hook 411 on one side opposite to the lower end frame 2;

[0078] The limiting grooves 42 are provided on the lower end frame 2 and have a plurality of spacing grooves arranged along the length direction of the lower end frame 2;

[0079] See also Figure 4 and Figure 5 As shown, in the first state, the limiting hook 411 is connected with the limiting groove 42 to limit the upper end frame 1 from switching from the first state to the second state.

[0080] In the embodiment of the utility model, in the first state, the limit hook 411 is connected with the limit slot 42. The first state represents the position of the upper frame 1 relative to the lower frame 2 when the limit hook 411 corresponds to the limit slot 42 (the limit hook 411 can be connected with the limit slot 42), hereinafter referred to as the position of the first state. The first state has one or at least two positions. In actual applications, the user can push the upper frame 1 to any position of the first state according to the vehicle maintenance needs. The upper frame 1 is in any position of the first state when it is in the first state.

[0081] In some embodiments, optionally, there are at least two positions of the first state, and the limiting grooves 42 have multiple positions spaced apart along the second direction, ensuring that the limiting hook 411 corresponds to the position of the limiting groove 42 when the upper end frame 1 is in any position of the first state.

[0082] In the embodiment of the utility model, in the second state, the upper frame 1 is folded close to the lower frame 2, the volume of the lift is reduced, and it is convenient to adjust the position of the lift. In practical applications, when a vehicle needs to be lifted, the user can easily adjust the lift in the second state to the bottom of the vehicle, which is convenient to use.

[0083] When the vehicle needs to be lifted, the user adjusts the lift in the second state to the bottom of the vehicle and operates the lifting bracket 3 to unfold upward. The lifting bracket 3 that unfolds upward pushes the upper frame 1 to gradually transform from the second state to the first state, and the upper frame 1 gradually moves away from the lower frame 2, and the upper frame 1 stops at the bottom of the vehicle. As the transformation from the second state to the first state proceeds, the upper frame 1 continues to rise and separates the vehicle from contact with the ground until the upper frame 1 is in the first state and the lifting is completed. At this time, the position of the limit hook 411 corresponds to the position of the limit slot 42, and the limit member 41 is rotated around the rotation connection between the first end and the lifting bracket 3 in the direction relative to the lower frame 2, so that the limit hook 411 is matched with the limit slot 42 to be connected, thereby limiting the transformation of the upper frame 1 from the first state to the second state.

[0084] It should be noted that, in actual applications, the vehicle may be lifted by one lift or by at least two lifts working synchronously.

[0085] See also Figure 4 and Figure 5As shown, when the upper frame 1 is in the first state, the limit hook 411 is connected with the limit groove 42 to lock the lifting bracket 3 in one direction. At this time, the lifting bracket 3 can continue to expand upward, pushing the upper frame 1 to continue to expand away from the lower frame 2, but the lifting bracket 3 cannot be retracted downward relative to the lower frame 2. The upper frame 1 in the first state cannot be converted to the second state of being retracted relative to the lower frame 2. The above arrangement is conducive to avoiding the situation where the lifting bracket 3 is pressed down and retracted due to the weight of the vehicle after lifting the vehicle, thereby ensuring the safety of users when repairing the vehicle.

[0086] The lifting machine of the utility model embodiment comprises: an upper frame, a lower frame parallel to the upper frame, a lifting bracket, and a limiting structure; the upper frame 1 has a first state in which it is unfolded away from the lower frame 2, and a second state in which it is retracted close to the lower frame 2; the lifting bracket 3 is arranged between the upper frame 1 and the lower frame 2, and is used to push the upper frame 1 to switch between the first state and the second state; the limiting structure 4 provided in the lifting machine of the utility model embodiment comprises: a limiting member 41, having a first end and a second end respectively located at both ends of the limiting member 41, and the first end is rotatably connected to the lifting bracket 3; a limiting hook 411 is provided on a side of the second end opposite to the lower frame 2; a limiting groove 42 is provided on the lower frame 2, and has a plurality of limiting grooves arranged at intervals along the length direction of the lower frame 2; in the first state, the limiting hook 411 is matched and connected with the limiting groove 42 to limit the upper frame 1 from switching from the first state to the second state. The limiting structure provided in the lifting machine of the utility model embodiment has a simple structure, and reduces the probability of failure caused by a complex structure.

[0087] It is easy to use and can effectively ensure the safety of users when repairing vehicles.

[0088] In some embodiments of the present invention, optionally, see Figures 2 to 8 As shown,

[0089] A magnetic member 44 is provided on the other side of the second end away from the lower end frame 2;

[0090] The limiting structure 4 also includes:

[0091] A retaining member 43, provided on the lifting bracket 3;

[0092] During the transition from the first state to the second state, the magnetic member 44 and the retaining member 43 are magnetically attached to each other, and the limiting hook 411 is separated from the limiting groove 42 .

[0093] During specific use, when the lifted vehicle needs to be lowered, the user operates the limit member 41 to rotate around the rotational connection between the limit member 41 and the lifting bracket 3 in a direction away from the lower end frame 2, so that the limit hook 411 is disengaged from the limit groove 42, and the lifting bracket 3 is unlocked; thereafter, the lifting bracket 3 is operated to retract downward, so that the upper end frame 1 is converted from the first state to the second state, and the lifted vehicle is lowered.

[0094] However, after the locking of the lifting bracket 3 is released, if the user no longer applies external force to the limiting member 41, the limiting member 41 will still have a tendency to rotate downward and approach the lower frame 2 due to its own weight. When the upper frame 1 moves to the position of the other first state, the limiting hook 411 is easy to cooperate with the limiting groove 42 to limit the upper frame 1 from switching from the first state to the second state. Therefore, during the process of the upper frame 1 switching from the first state to the second state, the user needs to continue to apply external force to the limiting member 41 to offset the effect of the limiting member 41's own weight and ensure that the upper frame 1 smoothly switches to the second state.

[0095] Based on the above problems, the embodiment of the utility model is provided with a magnetic member 44 on the other side of the second end away from the lower end frame 2, and a retaining member 43 is provided on the lifting bracket 3. During the conversion from the first state to the second state, the magnetic member 44 and the retaining member 43 are magnetically attached, and the limiting hook 411 is separated from the limiting groove 42. The user operates the limiting member 41 to rotate in the direction away from the lower end frame 2 around the rotation connection between the limiting member 41 and the lifting bracket 3 to release the lock of the lifting bracket 3. After that, the user continues to operate the limiting member 41 to rotate in the direction away from the lower end frame 2, so that the magnetic member 44 located on the other side of the second end away from the lower end frame 2 stops against the retaining member 43. After stopping against the retaining member 43, the magnetic attraction of the magnetic member 44 causes the magnetic member 44 to magnetically attach to the retaining member 43. Therefore, in the subsequent conversion process of the upper end frame 1 from the first state to the second state, the magnetic member 44 maintains magnetic contact with the retaining member 43, and the user does not need to continuously apply external force to the limit member 41 to offset the effect of the limit member 41's own gravity, which greatly reduces the user's work intensity and greatly improves the operating efficiency. The embodiment of the utility model can efficiently realize the lifting and lowering of the vehicle, with low user operation intensity and high operating efficiency.

[0096] In some embodiments of the present invention, optionally, see Figure 1 , 4 , 6 and 7, the lifting bracket 3 includes: two side brackets 30;

[0097] In the first direction, the upper end frame 1 and the lower end frame 2 are provided with a side bracket 30 between the side edges of one same side, and another side bracket 30 is provided between the side edges of the other same side;

[0098] Each side bracket 30 includes: a first support rod 31 and a second support rod 32 which are cross-hinged;

[0099] The lower ends of the two first support rods 31 are rotatably connected to the lower frame 2; the lower ends of the two second support rods 32 are rotatably connected to the lower frame 2 via the first pin shaft 33; and the lower ends of the two second support rods 32 are relatively slidably arranged on the lower frame 2 along the second direction via the first pin shaft 33, and the lower ends of the two second support rods 32 can also slide relative to the lower frame 2 along the second direction, and the second direction is perpendicular to the first direction;

[0100] The upper ends of the two second support rods 32 are rotatably connected to the upper end frame 1; the upper ends of the two first support rods 31 are rotatably connected to the upper end frame 1 via the second pin shaft 34; and, through the second pin shaft 34, which is relatively slidably arranged on the upper end frame 1 along the second direction, the upper ends of the two first support rods 31 can also slide relative to the upper end frame 1 along the second direction.

[0101] See also Figure 4 and Figure 6 As shown, when the upper frame 1 needs to be converted from the first state to the second state, the upper end of the second support rod 32 is operated to rotate downward around the hinge connection between the second support rod 32 and the first support rod 31, and the rotation drives the lower end of the second support rod 32 to rotate downward around the first pin 33, and drives the lower end of the second support rod 32 to slide toward the outside of the lower frame 2 along the second direction; in linkage, the first support rod 31 rotates downward around the rotation connection between itself and the lower frame 2, driving the upper end of the first support rod 31 to slide toward the outside of the upper frame 1 along the second direction. As a result, the lifting bracket 3 is retracted downward, and the lifting bracket 3 drives the upper frame 1 to convert from the first state to the second state.

[0102] See also Figure 4 and Figure 5 As shown, the principle of the limiting member 41 locking the lifting bracket 3 is that the limiting hook 411 is matched and connected with the limiting groove 42, and the first pin shaft 33 cannot slide toward the outside of the lower end frame 2 along the second direction.

[0103] In the embodiment of the utility model, two side brackets 30 are used, and in the first direction, one side bracket 30 is provided between the side edges of the upper end frame 1 and the lower end frame 2 on the same side, and another side bracket 30 is provided between the side edges of the other same side, so as to form a symmetrical support for the upper end frame 1, which is conducive to ensuring the stability of the upper end frame 1 when lifting the vehicle and protecting the safety of the user. In addition, each side bracket 30 includes: a cross-hinged first support rod 31 and a second support rod 32, and under the premise of ensuring the structural strength, the upward expansion and downward folding functions of the lifting bracket 3 are realized with a simple scissor structure, which can reduce the manufacturing cost of the lifting machine in the embodiment of the utility model and improve the reliability of the lifting machine.

[0104] In some embodiments of the present invention, optionally,

[0105] The first end is rotatably connected to the second support rod 32 via a first pin shaft 33 .

[0106] In the embodiment of the utility model, the first end is rotatably connected to the second support rod 32 through the first pin shaft 33, and the first pin shaft 33 that is rotatably connected to the lower end frame 2 is used to realize the rotatable connection of the limiter 41 on the lifting bracket 3, which can avoid the damage to the structural strength of the second support rod 32 caused by additional holes and shafts in the second support rod 32, thereby improving the reliability of the lift. No additional holes are required to set shafts, which also reduces the manufacturing process and reduces the manufacturing cost.

[0107] In some embodiments of the present invention, optionally,

[0108] A magnetic member 44 is provided on the other side of the second end away from the lower end frame 2;

[0109] The limiting structure 4 also includes:

[0110] A retaining member 43, provided on the lifting bracket 3;

[0111] Between the first state and the second state, the upper end frame 1 also has a first position relative to the lower end frame 2; in the first position, the limiting hook 411 is misaligned with each limiting groove 42;

[0112] During the conversion from the first state to the first position, the magnetic member 44 and the retaining member 43 are magnetically attached, and the limiting hook 411 is separated from the limiting groove 42;

[0113] During the position conversion process from the first position to the second state, the magnetic member 44 is separated from the retaining member 43, and the limiting hook 411 is separated from the limiting groove 42;

[0114] The lift also includes:

[0115] The reset structure 5 is used to release the magnetic fit between the magnetic member 44 and the retaining member 43 during the position conversion from the first position to the second state.

[0116] In the embodiment of the utility model, during the conversion of the upper end frame 1 from the first state to the second state, the lower end portion of the second support rod 32 slides along the second direction toward the outer side of the lower end frame 2, driving the limiting member 41 to slide along the second direction toward the outer side of the lower end frame 2, and the limiting hook 411 gradually moves away from the limiting groove 42. When the upper end frame 1 is in the first position, even if the magnetic fit between the magnetic member 44 and the retaining member 43 is released, the limiting hook 411 is misaligned with the limiting groove 42, and the limiting hook 411 cannot cooperate and connect with the limiting groove.

[0117] Therefore, during the position conversion process from the first position to the second state, the magnetic fit between the magnetic member 44 and the retaining member 43 can be released, so that the limit member 41 can be reset, thereby avoiding the problem of manually releasing the magnetic fit between the magnetic member 44 and the retaining member 43 when the upper end frame 1 is lifted again to be in the first state (the limit member 41 is required to lock the lifting bracket 3). The embodiment of the utility model releases the magnetic fit between the magnetic member 44 and the retaining member 43 during the position conversion process from the first position to the second state, thereby reducing the burden of manual operation caused by the failure of the limit member 41 to be reset in time during multiple lifting operations.

[0118] In some embodiments of the present invention, optionally, see Figure 2 , 3 , 9 and 10, the reset structure 5 comprises:

[0119] The guide groove 51 is provided on the stopper 41 and extends along the length direction of the stopper 41;

[0120] A third pin 52 is rotatably disposed on the edge of the lower end frame 2;

[0121] The connecting rod 53 has one end disposed in the guide groove 51, and can rotate relative to the stopper 41 and slide relative to the stopper 41 along the guide groove 51; the other end is fixedly connected to the third pin 52;

[0122] A reset member 54, one end of which is rotatably disposed at the end of the connecting rod 53 connected to the guide groove 51, and the other end of which is a wedge-shaped end with a tip pointing to the second end;

[0123] During the position transition from the first position to the second state, the wedge-shaped end portion extends into the gap between the second end portion and the retaining member 43 .

[0124] See also Figure 3 As shown, in the first direction, rollers 531 are rotatably provided on both sides of the end portion of the connecting rod 53 connected to the guide groove 51. The end portion of the connecting rod 53 connected to the guide groove 51 extends into the guide groove 51, and the rollers 531 are all located on the inner side of the guide groove 51. In the first direction, rollers 531 are rotatably provided on both sides of the end portion of the connecting rod 53 connected to the guide groove 51. The reset member 54 is rotatably provided at the end portion of the connecting rod 53 connected to the guide groove 51, and the reset member 54 is located on the outer side of the guide groove 51. Fig.10 As shown, the reset member 54 and the roller 531 are disposed on both sides of the guide slot 51, one outside and one inside. Through the roller 531, one end of the connecting rod 53 can rotate relative to the limit member 41, and can slide relative to the limit member 41 along the guide slot 51.

[0125] In the embodiment of the utility model, during the position conversion process of the upper end frame 1 from the first position to the second state, the lower end of the second support rod 32 slides toward the outer side of the lower end frame 2 along the second direction, and the second support rod 32 is retracted relative to the lower end frame 2. Through the first pin shaft 33 and the retaining member 43, the second support rod 32 drives the limiter 41 to retract relative to the lower end frame 2. The limiter 41 is retracted relative to the lower end frame 2, so that the end of the connecting rod 53 connected to the guide groove 51 slides along the guide groove 51 toward the second end, driving the reset member 54 to move into the gap between the second end and the retaining member 43, and the wedge-shaped end extends into the gap between the second end and the retaining member 43, so that the magnetic member 44 and the retaining member 43 are transformed from being fitted to forming a gap. As the wedge-shaped end continues to extend, the gap between the magnetic member 44 and the retaining member 43 gradually increases until the magnetic member 44 and the retaining member 43 are separated, and the magnetic fit between the magnetic member 44 and the retaining member 43 is released.

[0126] By utilizing the relative displacement between the second support rod 32 and the lower frame 2 during the position conversion of the upper frame 1 from the first position to the second state, the embodiment of the utility model can conveniently realize the resetting of the limiter and reduce the burden of manual operation.

[0127] In some embodiments of the utility model, optionally, the lifting machine further comprises:

[0128] The operating rod 6 is fixedly connected to the third pin 52. Figure 7 and Figure 8 As shown, when the upper frame 1 needs to be operated to switch from the first state to the second state, the user operates the operating rod 6 to rotate outward around the third pin shaft 52, driving the connecting rod 53 to pull the limiter 41 upward, and the limit hook 411 is separated from the limiter groove 42; continue to pull upward, the limiter 41 stops at the retaining member 43, and the magnetic member 44 is magnetically attached to the retaining member 43. The setting of the operating rod 6 can prevent the user's hand from reaching under the lifting bracket 3 to operate the limiter 41, which can effectively ensure the user's personal safety.

[0129] In some embodiments of the present invention, optionally, the first end is located between the two second support rods 32 in the first direction;

[0130] In some embodiments of the present invention, optionally,

[0131] The retaining member 43 is disposed between the two second support rods 32 in the first direction, which helps to ensure that the two side brackets 30 are evenly stressed.

[0132] In some embodiments of the utility model, optionally, the lifting machine further comprises:

[0133] The driving cylinder 7 comprises: a cylinder body 71, and a telescopic arm 72 slidably and telescopically arranged in the cylinder body 71;

[0134] The cylinder body 71 is rotatably connected to the lower end frame 2 , and the telescopic arm 72 is rotatably connected to the second support rod 32 .

[0135] In the embodiment of the utility model, the upward expansion and downward folding of the lifting bracket 3 are achieved by driving the oil cylinder 7, the operation stability is high, and the force of driving the oil cylinder 7 can meet the force requirement for lifting the vehicle.

[0136] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which are within the protection of the utility model.

Claims

1. A lifting machine, characterized in that: include: An upper frame, a lower frame parallel to the upper frame, a lifting bracket, and a limiting structure; The upper frame has a first state in which it is unfolded away from the lower frame, and a second state in which it is folded close to the lower frame; the lifting bracket is arranged between the upper frame and the lower frame, and is used to push the upper frame to switch between the first state and the second state; The limiting structure comprises: A limiting member, comprising a first end and a second end respectively located at two ends of the limiting member, wherein the first end is rotatably connected to the lifting bracket; and the second end has a limiting hook on a side opposite to the lower end bracket; A plurality of limit grooves are provided on the lower end frame and are arranged at intervals along the length direction of the lower end frame; In the first state, the limit hook is cooperatively connected with the limit slot to limit the upper end frame from switching from the first state to the second state.

2. The lifting machine according to claim 1, characterized in that: A magnetic member is provided on the other side of the second end away from the lower end frame; The limiting structure further includes: A retaining member, provided on the lifting bracket; During the transition from the first state to the second state, the magnetic member is magnetically attached to the retaining member, and the limiting hook is separated from the limiting groove.

3. The lifting machine according to claim 1, characterized in that: The lifting bracket comprises: two side brackets; In the first direction, one side bracket is provided between the side edges of the upper end bracket and the lower end bracket on the same side, and another side bracket is provided between the side edges of the other same side; Each of the side brackets comprises: a first support rod and a second support rod cross-hinged; The lower ends of the two first support rods are rotatably connected to the lower end frame; the lower ends of the two second support rods are rotatably connected to the lower end frame through a first pin shaft; and the lower ends of the two second support rods are relatively slidably arranged on the lower end frame along a second direction through the first pin shaft, and the lower ends of the two second support rods can also slide relative to the lower end frame along the second direction, and the second direction is perpendicular to the first direction; The upper ends of the two second support rods are rotatably connected to the upper end frame; the upper ends of the two first support rods are rotatably connected to the upper end frame via a second pin shaft; and, the upper ends of the two first support rods can also slide relative to the upper end frame along the second direction via the second pin shaft that is relatively slidable on the upper end frame along the second direction.

4. The lifting machine according to claim 3, characterized in that: The first end is rotatably connected to the second support rod through the first pin.

5. The lifting machine according to claim 4, characterized in that: A magnetic member is provided on the other side of the second end away from the lower end frame; The limiting structure further includes: A retaining member, provided on the lifting bracket; Between the first state and the second state, the upper end frame also has a first position relative to the lower end frame, and in the first position, the limiting hook is misaligned with each of the limiting grooves; During the conversion from the first state to the first position, the magnetic member and the retaining member are magnetically attached, and the limiting hook is disengaged from the limiting groove; During the position conversion from the first position to the second state, the magnetic member is separated from the retaining member, and the limiting hook is separated from the limiting groove; The lifting machine further comprises: The reset structure is used to release the magnetic fit between the magnetic member and the retaining member during the position conversion from the first position to the second state.

6. The lifting machine according to claim 5, characterized in that: The reset structure comprises: A guide groove, provided on the limiting member and extending along the length direction of the limiting member; A third pin is rotatably disposed on the edge of the lower end frame; A connecting rod, one end of which is disposed in the guide groove, and can rotate relative to the limiter and slide relative to the limiter along the guide groove; and the other end of the connecting rod is fixedly connected to the third pin shaft; A reset member, one end of which is rotatably disposed at the end of the connecting rod connected to the guide groove, and the other end of which is a wedge-shaped end with a tip pointing to the second end; During the position transition from the first position to the second state, the wedge-shaped end extends into the gap between the second end and the retaining member.

7. The lifting machine according to claim 6, characterized in that: Also includes: An operating rod is fixedly connected to the third pin shaft.

8. The lifting machine according to claim 5, characterized in that: The first end is located between the two second support rods in the first direction.

9. The lifting machine according to claim 8, characterized in that: The retaining member is arranged between the two second support rods in the first direction.

10. The lifting machine according to claim 6, characterized in that: Also includes: The driving oil cylinder comprises: a cylinder body and a telescopic arm slidably and telescopically arranged in the cylinder body; The cylinder body is rotatably connected to the lower end frame, and the telescopic arm is rotatably connected to the second support rod.

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