Jack with large bearing capacity

Abstract

The utility model relates to the technical field of jacks, in particular to a large-bearing-capacity jack which comprises a bottom frame, first connecting rods are movably installed at the two ends of the interior of the bottom frame respectively, second connecting rods are arranged on the inner sides of the other ends of the two first connecting rods respectively, and the other ends of the two second connecting rods are movably connected with a top frame. Transverse moving mechanisms are arranged on the two sides of the interior of the top frame, each transverse moving mechanism comprises a rack, a supporting plate and a first tooth head, and each supporting plate is of an L-shaped structure. The rack, the supporting plates, the first tooth heads and the second connecting rods are used in cooperation, when the first tooth heads on the same sides of the top ends of the two second connecting rods are in meshing transmission, the first tooth heads control the rack to horizontally move towards the outer side, and when the rack horizontally moves, the supporting plates at the top ends are driven to synchronously move along the interiors of the movable grooves; in this way, in the jacking process, the supporting area can be increased, and therefore the bearing capacity of the jack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of jacks, in particular to a jack with large bearing capacity. Background Art

[0002] A screw jack is a common type of jack that uses a screw to provide lifting force. A screw jack usually consists of a screw and a matching nut. The screw is a long rod with threads, while the nut is a cylinder with internal threads. The threaded fit between them allows the screw to rotate under the action of the nut, thereby providing the function of lifting or lowering.

[0003] When the existing screw jacks on the market are in use, the small contact area between the lifting part of the jack and the object will affect its bearing capacity. The smaller the contact area, the greater the pressure per unit area will be. This will cause the supported object to be subjected to excessive local force, increasing the risk of damage to the object or instability of the jack. Therefore, it is necessary to design a jack with a large bearing capacity. Utility Model Content

[0004] The purpose of the utility model is to provide a jack with large bearing capacity to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A jack with large bearing capacity, comprising

[0007] A bottom frame, wherein first connecting rods are movably mounted at both ends of the bottom frame, second connecting rods are respectively arranged inside the other ends of the two first connecting rods, and the other ends of the two second connecting rods are movably connected to a top frame;

[0008] Both sides of the top frame are provided with a transverse movement mechanism, the transverse movement mechanism comprises a rack, a support plate and a first tooth head, and the support plate is an L-shaped structure.

[0009] Preferably, a movable sleeve is movably installed between the left sides of the first connecting rod and the second connecting rod via a rotating shaft, a fixed sleeve is movably installed between the right sides of the first connecting rod and the second connecting rod via a rotating shaft, a threaded rod is movably installed on the middle part of the fixed sleeve via a bearing, the other end of the threaded rod is threadedly connected to the movable sleeve, and a rod sleeve is arranged on the outside of one end of the threaded rod away from the fixed sleeve;

[0010] Preferably, the outer walls of the two first connecting rods at one end away from the second connecting rod are both provided with second tooth heads, and the second tooth heads at the ends of the two first connecting rods are meshed;

[0011] Preferably, movable grooves are penetrated on both sides of the top of the top frame, and the two support plates are slidably connected to the movable grooves on both sides respectively;

[0012] Preferably, a spring is arranged inside the movable groove, the other end of the spring is fixedly connected to the support plate, and a support rod is arranged at one end of the support plate close to the spring, and the other end of the support rod passes through the spring and is movably connected to the outer wall of the top frame;

[0013] Preferably, the two second connecting rods are fixedly connected to a plurality of first tooth heads at the outer wall of one end of the inner part of the top frame, the first tooth heads at the ends of the two second connecting rods are meshed, and the bottom ends of the two support plates are fixedly connected to the racks, and the bottom ends of the racks are meshed with the first tooth heads.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. This jack with large bearing capacity is used in combination with a rack, a support plate, a first tooth head and a second connecting rod. When the first tooth heads on the same side of the top ends of the two second connecting rods are meshed and transmitted with each other, the first tooth head will control the rack to move horizontally outward. When the rack moves horizontally, it drives the support plate at the top to move synchronously along the inside of the movable groove. In this way, during the jacking process, the supporting area can be increased, thereby improving the bearing capacity of the jack.

[0016] 2. This jack with large bearing capacity is used by cooperation between the first connecting rod, the second connecting rod, the first tooth head and the second tooth head. When the movable sleeve moves laterally, it pushes the first connecting rod and the second connecting rod forward. When the first connecting rod and the second connecting rod on the left side move, the first connecting rod and the second connecting rod on the right side move synchronously, thereby controlling the lifting of the top frame. When the first connecting rod and the second connecting rod move, the second tooth heads arranged at the same end of the two first connecting rods and the first tooth heads arranged at the same end of the two second connecting rods are meshed and transmitted with each other, so that the structural stability is higher when supporting objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall main structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0019] Figure 3 For this utility model Figure 2 The enlarged schematic diagram of point A in the middle;

[0020] Figure 4 For this utility model Figure 2 A magnified schematic diagram of point B in the middle.

[0021] In the figure: 1, base frame; 2, first connecting rod; 3, second connecting rod; 4, top frame; 5, transverse movement mechanism; 501, rack; 502, support plate; 503, first tooth head; 6, movable sleeve; 7, fixed sleeve; 8, threaded rod; 9, rod sleeve; 10, second tooth head; 11, movable groove; 12, spring; 13, support rod. DETAILED DESCRIPTION

[0022] 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 only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0024] like Figure 1-4 As shown, a technical solution provided by the utility model:

[0025] A jack with large bearing capacity comprises a base frame 1, wherein first connecting rods 2 are movably mounted at both ends of the base frame 1, second connecting rods 3 are respectively arranged on the inner sides of the other ends of the two first connecting rods 2, and the other ends of the two second connecting rods 3 are movably connected to a top frame 4; both sides of the top frame 4 are provided with a transverse movement mechanism 5, the transverse movement mechanism 5 comprises a rack 501, a support plate 502 and a first tooth head 503, and the support plate 502 is an L-shaped structure; the two second connecting rods 3 are located at the outer wall of one end of the top frame 4, and are fixedly connected to a plurality of first tooth heads 503, the first tooth heads 503 at the ends of the two second connecting rods 3 are meshed, the bottom ends of the two support plates 502 are fixedly connected to the rack 501, and the bottom ends of the rack 501 are meshed with the first tooth heads 503

[0026] In this embodiment, when the first tooth heads 503 on the same side of the top ends of the two second connecting rods 3 are meshed and transmitted with each other, the first tooth heads 503 will control the rack 501 to move horizontally outward. When the rack 501 moves horizontally, it drives the top support plate 502 to move synchronously along the inside of the movable groove 11. In this way, during the jacking process, the supporting area can be increased, thereby increasing the bearing capacity of the jack.

[0027] like Figure 2 and Figure 4As shown, a movable sleeve 6 is movably installed between the left side of the first connecting rod 2 and the second connecting rod 3 through a rotating shaft, a fixed sleeve 7 is movably installed between the right side of the first connecting rod 2 and the second connecting rod 3 through a rotating shaft, a threaded rod 8 is movably installed in the middle of the fixed sleeve 7 through a bearing, the other end of the threaded rod 8 is threadedly connected with the movable sleeve 6, and a rod sleeve 9 is arranged on the outside of the end of the threaded rod 8 away from the fixed sleeve 7; the outer wall of the end of the two first connecting rods 2 away from the second connecting rod 3 is provided with a second tooth head 10, and the second tooth heads 10 at the ends of the two first connecting rods 2 are meshed;

[0028] In this embodiment, a tool is used to rotate the rod sleeve 9, and the rod sleeve 9 controls the rotation of the threaded rod 8. When the threaded rod 8 rotates, it drives the movable sleeve 6 to move laterally to one side of the fixed sleeve 7. When the movable sleeve 6 moves laterally, it pushes the first connecting rod 2 and the second connecting rod 3 forward. When the first connecting rod 2 and the second connecting rod 3 on the left side move, the first connecting rod 2 and the second connecting rod 3 on the right side move synchronously, thereby controlling the lifting of the top frame 4. When the first connecting rod 2 and the second connecting rod 3 move, the second tooth heads 10 set at the same end of the two first connecting rods 2 and the first tooth heads 503 set at the same end of the two second connecting rods 3 are engaged and transmitted with each other, so that the structural stability is higher when supporting objects.

[0029] like Figure 3 As shown, movable grooves 11 are penetrated and opened on both sides of the top of the top frame 4, and two support plates 502 are slidably connected to the movable grooves 11 on both sides respectively; a spring 12 is arranged inside the movable groove 11, and the other end of the spring 12 is fixedly connected to the support plate 502, and a support rod 13 is arranged at one end of the support plate 502 close to the spring 12, and the other end of the support rod 13 passes through the spring 12 and is movably connected to the outer wall of the top frame 4;

[0030] In this embodiment, when the second connecting rod 3 rises, the supporting plate 502 compresses the spring 12, and when the second connecting rod 3 falls, the compressed spring 12 controls the supporting plate 502 to return to its original position.

[0031] Working principle: When in use, place the jack on a horizontal ground, then align the two support plates 502 under the object, then use a tool to rotate the rod sleeve 9, the rod sleeve 9 controls the threaded rod 8 to rotate, and the threaded rod 8 rotates to drive the movable sleeve 6 to move laterally to one side of the fixed sleeve 7, and the movable sleeve 6 pushes the first connecting rod 2 and the second connecting rod 3 forward when it moves laterally. When the first connecting rod 2 and the second connecting rod 3 on the left side move, the first connecting rod 2 and the second connecting rod 3 on the right side move synchronously, thereby controlling the top frame 4 to lift up. When the first connecting rod 2 and the second connecting rod 3 move, the two first connecting rods The second tooth head 10 arranged at the same direction end of the rod 2 and the first tooth head 503 arranged at the same direction end of the two second connecting rods 3 are meshed and transmitted with each other, so that the structural stability is higher when supporting objects; when the first tooth heads 503 on the same direction side of the top ends of the two second connecting rods 3 are meshed and transmitted with each other, the first tooth head 503 will control the rack 501 to move horizontally outward, and when the rack 501 moves horizontally, it drives the top support plate 502 to move synchronously along the inside of the movable groove 11, so that during the jacking process, the supporting area can be increased, thereby increasing the bearing capacity of the jack.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A jack with large bearing capacity, characterized in that: include A bottom frame (1), wherein first connecting rods (2) are movably mounted at both ends of the bottom frame (1), second connecting rods (3) are respectively arranged inside the other ends of the two first connecting rods (2), and the other ends of the two second connecting rods (3) are movably connected to a top frame (4); Both sides of the top frame (4) are provided with a transverse movement mechanism (5), the transverse movement mechanism (5) comprising a rack (501), a support plate (502) and a first tooth head (503), and the support plate (502) is an L-shaped structure.

2. A jack with large bearing capacity according to claim 1, characterized in that: A movable sleeve (6) is movably installed between the left sides of the first connecting rod (2) and the second connecting rod (3) via a rotating shaft, and a fixed sleeve (7) is movably installed between the right sides of the first connecting rod (2) and the second connecting rod (3) via a rotating shaft. A threaded rod (8) is movably installed in the middle of the fixed sleeve (7) via a bearing, and the other end of the threaded rod (8) is threadedly connected to the movable sleeve (6), and a rod sleeve (9) is arranged on the outside of one end of the threaded rod (8) away from the fixed sleeve (7).

3. A jack with large bearing capacity according to claim 1, characterized in that: A second tooth head (10) is provided at the outer wall of one end of the two first connecting rods (2) away from the second connecting rod (3), and the second tooth heads (10) at the ends of the two first connecting rods (2) are meshed.

4. A jack with large bearing capacity according to claim 1, characterized in that: Both sides of the top of the top frame (4) are penetrated with movable grooves (11), and the two support plates (502) are respectively slidably connected to the movable grooves (11) on both sides.

5. A jack with large bearing capacity according to claim 4, characterized in that: A spring (12) is arranged inside the movable groove (11), and the other end of the spring (12) is fixedly connected to the support plate (502). A support rod (13) is arranged at one end of the support plate (502) close to the spring (12), and the other end of the support rod (13) passes through the spring (12) and is movably connected to the outer wall of the top frame (4).

6. A jack with large bearing capacity according to claim 1, characterized in that: The two second connecting rods (3) are fixedly connected to a plurality of first tooth heads (503) at the outer wall of one end inside the top frame (4), the first tooth heads (503) at the ends of the two second connecting rods (3) are meshed, and the bottom ends of the two support plates (502) are fixedly connected to the rack (501), and the bottom ends of the racks (501) are meshed with the first tooth heads (503).

Images