Field safety jack

Abstract

The utility model discloses a field safety jack which comprises a jack body and a safety supporting structure. The safety supporting structure comprises a pedal, a connecting rod, a deflector rod, cams, a supporting pin and a limiting block, one end of the pedal is a free end, the other end of the pedal is hinged to one end of the pedal connecting rod, the other end of the pedal connecting rod is connected with one end of the connecting rod, the other end of the connecting rod is connected with the deflector rod, a cam connecting rod is arranged below the deflector rod, and the cams are arranged at the two ends of the cam connecting rod respectively. The lower end of the supporting pin penetrates through the bottom frame and then is connected with the left supporting plate and the right supporting plate, and a limiting block is arranged on the portion, close to the front wheel side, of the bottom frame of the cam. When the pedal is treaded down, the deflector rod rotates to drive the cam to rotate in the clockwise direction, when the cam rotates to be in a limiting state with the limiting block, the center of the cam base, the center of the large arc face where the cam makes contact with the supporting pin and the center of the supporting pin are located on the same vertical plane, and the bottom faces of the left supporting plate and the right supporting plate and the front wheel and the rear wheel are located on the same plane.

Description

Technical Field

[0001] The utility model relates to a field safety jack, belonging to the technical field of jacks. Background Art

[0002] When the existing jack is used on soft ground such as sandy land or muddy land in the wild, since only the front and rear wheels touch the ground and the stress area is small, it is very easy to sink into the soft ground, resulting in the movement of the jack and the supported heavy object, and even more serious accidents, there are potential safety hazards. Content of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides a field safety jack.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A field safety jack, comprising a jack body, the jack body includes a chassis, a tray, a lifting arm and a handle, the chassis includes a left wallboard, a right wallboard, a front wheel and a rear wheel, the left wallboard and the right wallboard are arranged opposite to each other; the rear part of the lifting arm is pivotally connected between the left and right wallboards through a lifting arm shaft, and the tray is installed at the front part; the handle is arranged at the rear part of the chassis through a press button and is connected to the oil control part of the oil pump component located on the chassis, characterized in that it further includes a safety support structure, and the safety support structure is respectively arranged on the left wallboard and the right wallboard;

[0006] The safety support structure includes a footrest, a connecting rod, a lever, a cam, a support pin and a limit block. One end of the footrest is a free end, and the other end is hinged to one end of a footrest connecting rod. The other end of the footrest connecting rod is connected to one end of the connecting rod. The other end of the connecting rod is connected to the lever. A cam connecting rod is arranged below the lever. The cam connecting rod is hinged on the left wallboard and the right wallboard. The two ends of the cam connecting rod are respectively provided with the cams. The bottom of the cam is provided with the support pin. The lower end of the support pin passes through the chassis and is connected to the left support plate and the right support plate below. The upper end of the support pin is in contact with the cam, and a compression spring is arranged between the support pin and the chassis. The support pin can move up and down in the vertical direction; a limit block is arranged on the chassis near the front wheel side of the cam; when the footrest is stepped on, the footrest drives the lever to rotate, and the rotation of the lever drives the cam to rotate clockwise. When the cam rotates to a limit state with the limit block, the cam is limited on the support pin by the limit block, and the cam presses down the support pin until the center of the cam seat of the cam, the center of the large arc surface where the cam contacts the support pin, and the center of the support pin are on the same vertical plane, and the bottom surfaces of the left and right support plates are on the same plane as the front and rear wheels of the jack.

[0007] Furthermore, one end of the lever close to the cam is hinged on the lever seat by a second screw and a gasket, and the lever seat is fixed on the base frame; a roller is provided on the side of the lever, and the roller is hinged on the base frame through a roller shaft; the side of the lever contacts the outer surface of the roller, and when the lever rotates clockwise under the action of the foot, the lever slides on the roller to drive the cams on both sides of the cam connecting rod to rotate clockwise to a limit state.

[0008] Furthermore, the bottom of the support pin is fixedly connected to the left and right support plates by a first screw.

[0009] Furthermore, the cam is arranged on the supporting pin via a cam seat, and the cam is arranged to rotate along the cam seat.

[0010] Furthermore, a side of the cam connecting rod close to the cam is connected to the base frame through a connecting rod shaft.

[0011] Furthermore, a first nut and a connecting fork are sequentially provided at both ends of the connecting rod, and the connecting fork is hinged to the base frame through a first pin shaft and a first R-shaped pin.

[0012] Furthermore, the pedal and one end of the pedal connecting rod are connected to a third pin shaft through a second R-shaped pin, and the pedal is hinged on the base frame through a second nut and a pedal shaft.

[0013] Furthermore, a retaining ring and a spring washer are provided between the pedal pin and the base frame.

[0014] When the jack is used on a soft ground such as sand or mud in the wild, the pedal is stepped on in advance, and the lever is used to move the cam to rotate clockwise, so that the cam is in a state of being limited by the limit block. At this time, the center of the cam seat of the cam, the center of the large arc surface where the cam contacts the support pin, and the center of the support pin are in the same vertical plane. At this time, the bottom surface of the left and right support plates connected to the support pin is basically in the same plane as the horizontal plane where the front and rear wheels of the jack are located. At the same time, the center of the second pin shaft and the center of the third pin shaft form a small angle A with the horizontal line below the horizontal line, and the center of the second pin shaft and the center of the pedal shaft are just horizontal. This state can make the pedal in a self-locking state. At this time, because there are two large-area support plates on the bottom surface of the jack and the soft ground support, the jack can stably lift heavy objects without the jack sinking into the soft ground, thereby playing a role of safe support.

[0015] Compared with the prior art, the beneficial effects of the utility model are embodied in:

[0016] 1. When the jack is used on a soft ground such as sand or mud in the wild, the utility model steps on the pedal to make the lever drive the cam to rotate clockwise, so that the cam is limited by the limit block. At this time, the center of the cam seat of the cam, the center of the large arc surface where the cam contacts the support pin, and the center of the support pin are in the same vertical plane. At this time, the bottom surfaces of the left and right support plates connected to the support pin are basically in the same plane as the horizontal plane where the front and rear wheels of the jack are located.

[0017] 2. After the jack lifts the weight, the utility model has a large-area safety mechanism that stably supports the ground, ensuring that the jack will not sink into the soft ground, thereby playing a role of safety support. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the folded state of the safety support structure of the utility model.

[0019] Figure 2 yes Figure 1 Top view of the .

[0020] Figure 3 It is a schematic diagram of the working status of the safety support structure.

[0021] Figure 4 yes Figure 3 Top view of the . DETAILED DESCRIPTION

[0022] The specific implementation of the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the utility model, and is not used to limit the embodiment of the utility model.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0028] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0029] The present utility model will be described in detail below with reference to the drawings and in conjunction with exemplary embodiments.

[0030] Reference Figures 1 to 4, A kind of field safety jack of the utility model includes a jack body 1. The jack body includes a chassis, a tray, a lifting arm and a handle. The chassis includes a left wallboard 2, a right wallboard 3, a front wheel and a rear wheel. The left wallboard 2 and the right wallboard 3 are arranged opposite to each other; the rear part of the lifting arm is pivotally connected between the left and right wallboards through a lifting arm shaft, and the tray is installed at the front part; the handle is arranged at the rear part of the chassis through a press handle and is connected to the oil control part of the oil pump component located on the chassis. It also includes a safety support structure, and the safety support structures are respectively arranged on the left wallboard 2 and the right wallboard 3;

[0031] The safety support structure includes a footrest 4, a connecting rod 6, a lever 7, a cam 9, a support pin 10 and a limit block 11. One end of the footrest 4 is a free end, and the other end is hinged to one end of a footrest connecting rod 5. The other end of the footrest connecting rod 5 is connected to one end of the connecting rod 6. The other end of the connecting rod 6 is connected to the lever 7. A cam connecting rod 8 is arranged below the lever 7. The cam connecting rod 8 is hinged on the left wallboard 2 and the right wallboard 3. The two ends of the cam connecting rod 8 are respectively provided with the cam 9. The bottom of the cam 9 is provided with the support pin 10. The lower end of the support pin 10 passes through the chassis and is connected to the lower left support plate 12 and right support plate 13. The upper end of the support pin 10 is in contact with the cam 9, and a compression spring 14 is arranged between the support pin 10 and the chassis. The support pin 10 can move up and down in the vertical direction; a limit block 11 is arranged on the chassis on the side of the cam 9 close to the front wheel; when the footrest 4 is stepped on, the footrest 4 drives the lever 7 to rotate. The rotation of the lever 7 drives the cam 9 to rotate clockwise. When the cam 9 rotates to a limiting state with the limit block 11, the cam 9 is limited on the support pin 10 by the limit block 11. The cam 9 presses down the support pin 10 until the center of the cam seat 17 of the cam 9, the center of the large arc surface where the cam 9 contacts the support pin 10, and the center of the support pin 10 are on the same vertical plane, and the bottom surfaces of the left and right support plates are on the same plane as the front and rear wheels of the jack.

[0032] In an embodiment, one end of the lever 7 close to the cam 9 is hinged to a lever seat 35 through a second screw 19 and a gasket 18. The lever seat 35 is fixed on the chassis; a roller 25 is arranged on the side of the lever 7. The roller 25 is hinged to the chassis through a roller shaft 26; the side of the lever 7 is in contact with the outer surface of the roller 25. When the lever 7 rotates clockwise under the action of the footrest 4, the lever 7 slides on the roller 25 to drive the cams 9 on both sides of the cam connecting rod 8 to rotate clockwise to the limiting state.

[0033] In an embodiment, the bottom of the support pin 10 is fixedly connected to the left and right support plates through a first screw 15.

[0034] In one embodiment, the cam 9 is disposed on the support pin 10 via a cam seat 17 , and the cam 9 is configured to rotate along the cam seat 17 .

[0035] In one embodiment, the side of the cam connecting rod 8 close to the cam is connected to the base frame through a connecting rod shaft 20.

[0036] In one embodiment, a first nut 21 and a connecting fork 22 are sequentially provided at both ends of the connecting rod 6 , and the connecting fork 22 is hinged to the base frame through a first pin shaft 24 and a first R-shaped pin 23 .

[0037] In one embodiment, the pedal 4 and one end of the pedal connecting rod 5 are connected through a second R-shaped pin 33 and a third pin shaft 34 , and the pedal 4 is hinged on the base frame through a second nut 29 and a pedal shaft 31 .

[0038] In one embodiment, a retaining ring 32 and a spring washer 30 are provided between the pedal shaft 31 and the base frame.

[0039] In one embodiment, a sleeve pin 16 is sleeved on the support pin.

[0040] When the jack is used on a soft ground such as sand or mud in the wild, the pedal is stepped on in advance, and the lever is used to move the cam to rotate clockwise, so that the cam is in a state of being limited by the limit block. At this time, the center of the cam seat of the cam, the center of the large arc surface where the cam contacts the support pin, and the center of the support pin are in the same vertical plane. At this time, the bottom surface of the left and right support plates connected to the support pin is basically in the same plane as the horizontal plane where the front and rear wheels of the jack are located. At the same time, the center of the second pin shaft and the center of the third pin shaft form a small angle A with the horizontal line below the horizontal line, and the center of the second pin shaft and the center of the pedal shaft are just horizontal. This state can make the pedal in a self-locking state. At this time, because there are two large-area support plates on the bottom surface of the jack and the soft ground support, the jack can stably lift heavy objects without the jack sinking into the soft ground, thereby playing a role of safe support.

[0041] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A field safety jack, comprising a jack body, the jack body comprising a chassis, a tray, a lifting arm and a handle, the chassis comprising a left wall panel, a right wall panel, a front wheel and a rear wheel, the left wall panel and the right wall panel are arranged opposite to each other; the rear part of the lifting arm is pivotally connected between the left and right wall panels through a lifting arm shaft, and the front part is equipped with the tray; the handle is arranged at the rear part of the chassis through a press handle, and is connected to the oil control part of the oil pump component located on the chassis, characterized in that: It also includes a safety support structure, and the safety support structure is respectively arranged on the left wall panel and the right wall panel; The safety support structure includes a footrest, a connecting rod, a lever, a cam, a support pin and a limit block, one end of the footrest is a free end, and the other end is hinged to one end of the footrest connecting rod, the other end of the footrest connecting rod is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the lever, a cam connecting rod is arranged below the lever, the cam connecting rod is hinged on the left wall panel and the right wall panel, the cams are respectively arranged at both ends of the cam connecting rod, the support pin is arranged at the bottom of the cam, the lower end of the support pin passes through the base frame and is connected to the left support plate and the right support plate below, the upper end of the support pin contacts the cam, and A compression spring is arranged between the support pin and the base frame, and the support pin can move up and down in the vertical direction; a limit block is arranged on the base frame near the front wheel side of the cam; when the pedal is stepped on, the pedal drives the lever to rotate, and the rotation of the lever drives the cam to rotate in the clockwise direction. When the cam rotates to be in a limited state with the limit block, the cam is limited on the support pin by the limit block, and the cam presses the support pin downward until the center of the cam seat of the cam, the center of the large arc surface in contact with the cam and the support pin, and the center of the support pin are in the same vertical plane, and the bottom surfaces of the left and right support plates are in the same plane with the front and rear wheels of the jack.

2. A field safety jack as claimed in claim 1, characterized in that: The end of the lever close to the cam is hinged on the lever seat by a second screw and a gasket, and the lever seat is fixed on the base frame; a roller is provided on the side of the lever, and the roller is hinged on the base frame through a roller shaft; the side of the lever is in contact with the outer surface of the roller, and when the lever rotates clockwise under the action of the foot, the lever slides on the roller to drive the cams on both sides of the cam connecting rod to rotate clockwise to a limit state.

3. A field safety jack as claimed in claim 1, characterized in that: The bottom of the support pin is fixedly connected to the left and right support plates by a first screw.

4. A field safety jack as claimed in claim 1, characterized in that: The cam is arranged on the supporting pin via a cam seat, and the cam is arranged to rotate along the cam seat.

5. A field safety jack as claimed in claim 1, characterized in that: The side of the cam connecting rod close to the cam is connected to the base frame through a connecting rod shaft.

6. A field safety jack as claimed in claim 1, characterized in that: The two ends of the connecting rod are provided with a first nut and a connecting fork in sequence, and the connecting fork is hinged on the base frame through a first pin shaft and a first R-shaped pin.

7. A field safety jack as claimed in claim 1, characterized in that: The pedal and one end of the pedal connecting rod are connected with the third pin shaft through a second R-shaped pin, and the pedal is hinged on the base frame through a second nut and a pedal shaft.

8. A field safety jack as claimed in claim 1, characterized in that: A retaining ring and a spring washer are arranged between the pedal pin shaft and the base frame.

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