Safety pressure limiting device of jack

Abstract

The utility model relates to the field of safety pressure limiting devices, in particular to a safety pressure limiting device for a jack. The technical problems that few existing jack pressure limiting devices are provided with buffering assemblies, jacks are prone to being damaged, meanwhile, the existing jacks need to be manually adjusted, time and labor are wasted, and hearing of workers is affected due to the fact that noise is too large in the using process of the existing jacks are solved. According to the technical scheme, the jack safety pressure limiting device comprises a supporting table and an adjusting rod. Equipment can be moved through the moving assembly, the problem that manual adjustment is needed by a worker is solved, noise reduction processing is conducted on the equipment through the protective shell, and the problem that hearing of the worker is affected due to the fact that sound is too loud in the using process of the equipment is solved; the safety pressure limiting mechanism and the elastic assembly can give an alarm when the use of the device reaches the limit, and meanwhile, a buffer space is reserved, so that the fault tolerance in use is increased, and the jack is prevented from being damaged in use.

Description

Technical Field

[0001] The utility model relates to a field safety pressure limiting device, in particular to a jack safety pressure limiting device. Background Art

[0002] A jack is a small and light lifting equipment, which is widely used in factories, mines, transportation and other departments for vehicle repair, lifting and supporting work. However, in the existing jack pressure limiting device, the alarm will be triggered only when it reaches the limit, which can easily cause damage to the jack during use. At the same time, the existing jack makes very harsh noise during use, and long-term use will cause hearing loss to workers. At the same time, the jack in the prior art requires workers to perform manual measurement and installation during use, which greatly increases the labor intensity of workers. Therefore, there is an urgent need for a jack pressure limiting device with a buffer component, which can automatically adjust the position during use, and a jack installation pressure limiting device with sound insulation function. Utility Model Content

[0003] In order to overcome the problems that the existing jack pressure limiting devices are rarely installed with buffer components, which easily cause damage to the jack, the existing jacks require manual adjustment, which is time-consuming and labor-intensive, and the existing jacks produce excessive noise during use, affecting the workers' hearing.

[0004] The technical solution of the utility model is: a jack safety pressure limiting device, comprising a support platform, a moving component, a jack base, a safety pressure limiting mechanism, a protective shell, an elastic component and an adjusting rod; the moving component is installed on the upper end of the support platform; the jack base is installed above the moving component; the safety pressure limiting mechanism is installed on the upper end surface of the jack base; the protective shell is installed on the outer layer of the safety pressure limiting mechanism; the elastic component is installed inside the safety pressure limiting mechanism; and the adjusting rod is arranged on the side end of the protective shell.

[0005] Preferably, when in use, the device can be fixed in the desired position by using a support table, and the position of the device can be adjusted by using a movable component during use, which solves the problem that the existing equipment needs manpower to adjust during use, which is time-consuming and labor-intensive. At the same time, the use of a jack base can ensure the normal installation and operation of the components, and the use of a safety pressure limiting mechanism can allow the device to issue a timely warning when the pressure value of the device is too high during use to prevent damage to the device. The protective shell can be used to reduce the noise of the jack to prevent the workers from hearing problems caused by excessive noise during use. The use of an elastic component can reserve a buffer space for the jack during use. When the alarm is heard, there will also be a very small buffer space, which increases fault tolerance and prevents the problem of excessive pressure damaging the equipment when the alarm is heard during use.

[0006] Preferably, the support platform includes support legs, a mounting chassis, a table top, a slide groove and a card slot; a table top is provided inside the support platform; multiple groups of support legs are installed on the lower end surface of the table top; the mounting chassis are installed on the multiple groups of support legs; a slide groove is provided on the upper end surface of the table top; two groups of card slots are provided on the inner side wall of the slide groove. When in use, the support legs can be used to support the components above, and the mounting chassis can be used to install the equipment in the required position to prevent movement, and the table top can be used to support the components above, and the slide groove and the card slot can be used to allow the components above to be stably installed and slide smoothly.

[0007] Preferably, the moving component includes a rotating shaft, a handle, a manual rotating wheel, a steel coil and a rotating groove; the rotating shaft is installed inside the slide groove; a manual rotating wheel is installed at one end of the rotating shaft; multiple sets of handles are installed on the manual rotating wheel; multiple sets of steel coils are installed on the rotating shaft; a rotating groove is formed between every two sets of steel coils. When in use, the rotation of the manual rotating wheel can drive the rotation of the rotating shaft, and the rotation of the rotating shaft will synchronously drive the rotation of the steel coil. The equipment will move with the rotation of the steel coil, thereby adjusting the position of the equipment. At the same time, the handle can make it easier and more labor-saving for workers to use it.

[0008] Preferably, the jack base includes a main platform, a moving block and a clamping block; a moving block is arranged on the rotating shaft; clamping blocks are installed on both sides of the moving block; the main platform is installed on the upper end surface of the moving block. When in use, the main platform can be used to support and install the components above, and the moving block and the clamping block can be used to stably install the jack base on the equipment.

[0009] Preferably, the safety pressure limiting mechanism includes an outer sleeve, a mounting pad, a top head, a mounting plate, a plug rod, a limit ring, a fixed plate, an alarm, a fixed ring, a button, an annular threaded part, a battery and a socket; the upper end surface of the main platform is equipped with a mounting pad by bolts; the upper end of the mounting pad is equipped with an outer sleeve; the plug rod is installed inside the outer sleeve; the mounting plate is installed on the upper end of the plug rod; the upper end surface of the mounting plate is equipped with a top head; the upper end surface of the outer sleeve is threadedly connected to the limit ring; the lower end surface of the limit ring is equipped with an annular threaded part; the lower end of the plug rod is equipped with a fixed disk; multiple groups of sockets are provided on the fixed disk; buttons are installed inside the multiple groups of sockets; an alarm is installed on the lower end surface of the fixed disk; a battery is installed inside the alarm; a fixed ring is installed on the lower end surface of the alarm, and when in use, the outer sleeve can be used to ensure that the internal components The components can operate normally, and the components can be installed on the equipment by using the mounting pad, and the top head can be used to carry the objects that need to be carried on the top, and the mounting plate can be used to stably install the plug rod and the top head together, and the limiting ring can be used to prevent the plug rod from moving outside the outer sleeve when the equipment is in use, and the limiting ring is fixed to the inside of the outer sleeve by using the annular threaded part below, and the button can be fixedly installed by using the fixing plate, and a plurality of sockets are provided on the fixing plate, and when the guide rod of the upper elastic component is inserted into the socket and the button is pressed, the alarm below will sound an alarm, so that the workers can stop the urgent pressurization of the equipment, and a battery is installed inside the alarm to provide a power source for the alarm, and the component can be fixedly installed by using the fixing ring to prevent movement.

[0010] Preferably, the protective shell includes a sound insulation steel plate, a sound insulation pad, a shock-absorbing plate, sound insulation cotton and an inner installation plate; a sound insulation steel plate is installed on the upper end surface of the main platform; a sound insulation pad is installed on the inner side wall of the sound insulation steel plate; a shock-absorbing plate is installed on the inner side wall of the sound insulation pad; sound insulation cotton is installed on the inner side wall of the shock-absorbing plate; and an inner installation plate is installed on the inner side wall of the sound insulation cotton. When in use, the protective shell can be installed on the equipment using the inner installation plate, and the noise emitted by the equipment can be reduced by the sound insulation cotton, and the shock-absorbing plate can isolate the impact force during the start-up, stop or operation of the equipment to prevent the equipment from sudden impact or vibration, the sound insulation pad can be used to perform secondary noise reduction on the equipment, and the sound insulation steel plate can be used to protect internal components and reduce the noise of the equipment at the same time.

[0011] Preferably, the elastic component includes an upper mounting plate, a fixed platform, a spring, a lower mounting plate and a guide rod; the upper mounting plate is installed below the annular threaded member; multiple sets of fixed platforms are installed on the lower end surface of the upper mounting plate; springs are installed on the multiple sets of fixed platforms; dampers are installed on both upper and lower ends of the spring; the lower mounting plate is installed on the lower end of the spring; multiple sets of guide rods are installed on the lower end surface of the lower mounting plate. When in use, the upper mounting plate can be used to fix the elastic component inside the equipment, and the fixed platform can be used to prevent the spring below from moving, and the spring can be used to leave a buffer space for the equipment when in use to protect the equipment, and the lower mounting plate can be used to support the components below, and the guide rod can be inserted into the jack opened on the fixed plate when the equipment reaches a high pressure state during use to press the internal button to alarm.

[0012] Beneficial effects of the utility model:

[0013] 1. The device can be fixedly installed in the desired position by using the support table, and the position of the device can be adjusted by using the mobile component during use, which solves the problem that the existing equipment needs manpower to adjust during use, which is time-consuming and labor-intensive. At the same time, the jack base can ensure the normal installation and operation of the components, and the safety pressure limiting mechanism can give timely warnings when the pressure value of the device is too high during use to prevent damage to the device. The protective shell can be used to reduce the noise of the jack to prevent the workers from hearing problems caused by excessive noise during use. The elastic component can reserve buffer space for the jack during use. When the alarm is heard, there will be a very small buffer space, which increases fault tolerance and prevents the problem of excessive pressure damaging the equipment when the alarm is heard during use.

[0014] 2. The rotation of the manual wheel can drive the rotation of the shaft, and the rotation of the shaft will synchronously drive the rotation of the steel coil. The equipment will move with the rotation of the steel coil, thereby adjusting the position of the equipment. At the same time, using the handle can make it easier and more labor-saving for workers to use.

[0015] 3. The protective shell can be installed on the equipment using the inner mounting plate, and the noise emitted by the equipment can be reduced using sound insulation cotton. The shock-absorbing plate can isolate the impact force during the start-up, stop or operation of the equipment to prevent the equipment from sudden impact or vibration. The sound insulation pad can be used for secondary noise reduction of the equipment, and the sound insulation steel plate can be used to protect the internal components and reduce the noise of the equipment at the same time.

[0016] 4. The outer sleeve can ensure the normal operation of the internal components, and the mounting pad can be used to install the components on the equipment. The top head can be used to carry the objects that need to be carried on the top, and the mounting plate can be used to stably install the plug rod and the top head together. The limiting ring can prevent the plug rod from moving outside the outer sleeve when the equipment is in use. The limiting ring is fixed to the inside of the outer sleeve by using the annular threaded part below. The button can be fixedly installed by the fixing plate, and a plurality of sockets are provided on the fixing plate. When the guide rod of the upper elastic component is inserted into the socket and the button is pressed, the alarm below will sound. An alarm is sounded, so that workers can stop urgently pressurizing the equipment. At the same time, a battery is installed inside the alarm to provide a power source for the alarm. The fixed ring can be used to fix the component to prevent movement. The upper mounting plate can be used to fix the elastic component inside the equipment. The fixed platform can prevent the spring below from moving. The spring can leave a buffer space for the equipment when it is in use to protect the equipment. The lower mounting plate can be used to support the components below. When the equipment reaches a high-pressure state during use, the guide rod can be inserted into the jack opened on the fixed plate to press the internal button to alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 What is shown is a three-dimensional structural schematic diagram of the structure of the utility model;

[0018] Figure 2 What is shown is a schematic diagram of the three-dimensional structure of the mobile component of the utility model;

[0019] Figure 3 What is shown is a schematic diagram of the three-dimensional structure of the jack base of the utility model;

[0020] Figure 4 What is shown is a schematic diagram of the three-dimensional structure of the protective housing of the utility model;

[0021] Figure 5 What is shown is a schematic diagram of the three-dimensional structure of the safety pressure limiting mechanism of the utility model;

[0022] Explanation of the reference numerals: 1. Support platform; 2. Moving assembly; 3. Jack base; 4. Safety pressure limiting mechanism; 5. Protective shell; 6. Elastic assembly; 7. Adjustment rod; 101. Support leg; 102. Mounting chassis; 103. Table; 104. Slide; 105. Slot; 201. Rotating shaft; 202. Handle; 203. Manual rotating wheel; 204. Steel coil; 205. Rotating slot; 301. Main platform; 302. Moving block; 303. Slot; 401. Outer sleeve; 402. Mounting pad Plate; 403, top head; 404, mounting plate; 405, plug rod; 406, limit ring; 407, fixed plate; 408, alarm; 409, fixed ring; 410, button; 411, annular threaded part; 412, battery; 413, jack; 501, sound insulation steel plate; 502, sound insulation pad; 503, shock absorption plate; 504, sound insulation cotton; 505, inner mounting plate; 601, upper mounting plate; 602, fixing table; 603, spring; 604, lower mounting plate; 605, guide rod. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1-3The utility model provides an embodiment: a jack safety pressure limiting device, including a support platform 1, a moving component 2, a jack base 3, a safety pressure limiting mechanism 4, a protective shell 5, an elastic component 6 and an adjusting rod 7; the moving component 2 is installed on the upper end of the support platform 1; the jack base 3 is installed above the moving component 2; the safety pressure limiting mechanism 4 is installed on the upper end surface of the jack base 3; the protective shell 5 is installed on the outer layer of the safety pressure limiting mechanism 4; the elastic component 6 is installed inside the safety pressure limiting mechanism 4; the side end of the protective shell 5 is provided with an adjusting rod 7. When in use, the support platform 1 can be used to fix the device in the desired position, and the moving component 2 can be used to adjust the position of the device during use, which solves the problem that the existing equipment needs to be manually adjusted during use. The force is adjusted, which is time-consuming and laborious. At the same time, the use of the jack base 3 can ensure the normal installation and operation of the components, and the use of the safety pressure limiting mechanism 4 can allow the equipment to be warned in time when the pressure value of the equipment is too large during use to prevent damage to the device. The use of the protective shell 5 can reduce the noise of the jack to prevent the problem of excessive noise during use and the hearing of the workers. The use of the elastic component 6 can reserve a buffer space for the jack during use. When the alarm is heard, there will also be a very small buffer space, which increases the fault tolerance and prevents the problem of excessive pressure damaging the equipment when the alarm is heard during use. The support platform 1 includes a support leg 101, a mounting chassis 102, a table 103, a slide groove 104 and a card slot 105. ; A table 103 is provided inside the support platform 1; a plurality of support legs 101 are installed on the lower end surface of the table 103; a mounting chassis 102 is installed on each of the plurality of support legs 101; a slide groove 104 is provided on the upper end surface of the table 103; two groups of card slots 105 are provided on the inner side wall of the slide groove 104. When in use, the support legs 101 can be used to support the upper components, and the mounting chassis 102 can be used to install the equipment at a desired position to prevent movement, and the table 103 can be used to carry the upper components, and the slide groove 104 and the card slot 105 can be used to allow the upper components to be stably installed and slide smoothly. The mobile component 2 includes a rotating shaft 201, a handle 202, a manual rotating wheel 203, a steel coil 204 and a rotating groove 2 05; a rotating shaft 201 is installed inside the slide 104; a manual rotating wheel 203 is installed at one end of the rotating shaft 201; multiple groups of handles 202 are installed on the manual rotating wheel 203; multiple groups of steel coils 204 are installed on the rotating shaft 201; a rotating groove 205 is formed between every two groups of steel coils 204. When in use, the rotation of the manual rotating wheel 203 can drive the rotation of the rotating shaft 201, and the rotation of the rotating shaft 201 will synchronously drive the rotation of the steel coil 204. The equipment will move with the rotation of the steel coil 204, thereby adjusting the position of the equipment. At the same time, using the handle 202 can make it easier and more labor-saving for workers to use. The jack base 3 includes a main platform 301, a moving block 302 and a clamping block 303; a moving block 302 is arranged on the rotating shaft 201;The moving block 302 is provided with a clamping block 303 on both sides; the upper end surface of the moving block 302 is provided with a main platform 301. When in use, the main platform 301 can be used to carry and install the components above, and the moving block 302 and the clamping block 303 can be used to stably install the jack base 3 on the equipment.

[0025] See also Figure 4-5The safety pressure limiting mechanism 4 includes an outer sleeve 401, a mounting pad 402, a head 403, a mounting plate 404, a plug 405, a limit ring 406, a fixing plate 407, an alarm 408, a fixing ring 409, a button 410, an annular threaded member 411, a battery 412 and a socket 413; the upper end surface of the main body 301 is fixed with a mounting pad 402 by bolts; the upper end of the mounting pad 402 is fixed with the outer sleeve 401; the plug 405 is installed inside the outer sleeve 401; the mounting plate 404 is installed on the upper end of the plug 405; the head 403 is installed on the upper end surface of the mounting plate 404; the outer sleeve 401 is The end face is threadedly connected with a limit ring 406; the lower end face of the limit ring 406 is installed with an annular threaded member 411; the lower end of the plug rod 405 is installed with a fixed disk 407; a plurality of groups of jacks 413 are provided on the fixed disk 407; buttons 410 are installed inside the plurality of groups of jacks 413; an alarm 408 is installed on the lower end face of the fixed disk 407; a battery 412 is installed inside the alarm 408; a fixed ring 409 is installed on the lower end face of the alarm 408. When in use, the outer sleeve 401 can be used to ensure the normal operation of the internal components, and the mounting pad 402 can be used to install the components on the equipment, and the top head 403 can be used to The object to be carried above is carried, and the insertion rod 405 and the top head 403 can be stably installed together by using the installation piece 404. At the same time, the insertion rod 405 will not move to the outside of the outer sleeve 401 when the device is in use by using the limiting ring 406. At the same time, the limiting ring 406 is fixed to the inside of the outer sleeve 401 by using the annular threaded member 411 below. The button 410 can be fixedly installed by using the fixing plate 407. At the same time, a plurality of sockets 413 are provided on the fixing plate 407. When the guide rod 605 of the upper elastic component 6 is inserted into the socket 413 and the button 410 is pressed, the alarm 408 below An alarm will sound, so that the workers can stop the urgent pressure on the equipment. At the same time, a battery 412 is installed inside the alarm 408 to provide a power source for the alarm 408, and the fixed ring 409 can be used to fix the assembly to prevent movement. The protective shell 5 includes a sound insulation steel plate 501, a sound insulation pad 502, a shock absorption plate 503, sound insulation cotton 504 and an inner installation plate 505; the upper end surface of the main platform 301 is installed with a sound insulation steel plate 501; the inner side wall of the sound insulation steel plate 501 is installed with a sound insulation pad 502; the inner side wall of the sound insulation pad 502 is installed with a shock absorption plate 503; the inner side wall of the shock absorption plate 503 is installed with sound insulation cotton 504;An inner mounting plate 505 is installed on the inner wall of the sound insulation cotton 504. When in use, the protective shell 5 can be installed on the equipment by using the inner mounting plate 505. At the same time, the noise emitted by the equipment can be reduced by using the sound insulation cotton 504. The shock absorbing plate 503 can isolate the impact force during the start-up, stop or operation of the equipment to prevent the equipment from sudden impact or vibration. The sound insulation pad 502 can be used to perform secondary noise reduction on the equipment. The sound insulation steel plate 501 can be used to protect the internal components and reduce the noise of the equipment. The elastic component 6 includes an upper mounting plate 601, a fixing platform 602, a spring 603, a lower mounting plate 604 and a guide rod 605; the upper mounting plate 601 is installed below the annular threaded member 411; the lower portion of the upper mounting plate 601 is provided with ... The end surface is equipped with multiple sets of fixed platforms 602; multiple sets of fixed platforms 602 are equipped with springs 603; dampers are installed at both ends of the springs 603; the lower end of the springs 603 is equipped with a lower mounting plate 604; the lower end surface of the lower mounting plate 604 is equipped with multiple sets of guide rods 605. When in use, the upper mounting plate 601 can be used to fix the elastic component 6 inside the device, and the fixed platform 602 can be used to prevent the spring 603 below from moving, and the spring 603 can be used to leave a buffer space for the device when in use to protect the device, and the lower mounting plate 604 can be used to carry the components below, and the guide rod 605 can be inserted into the jack 413 opened on the fixed plate 407 when the device reaches a high pressure state during use, and press the button 410 inside, thereby alarming. ;

[0026] First, the supporting legs 101 can be used to support the upper components, and the mounting chassis 102 can be used to install the equipment at the required position to prevent movement. The platform 103 can be used to support the upper components, and the slide grooves 104 and the card slots 105 can allow the upper components to be stably installed and slide smoothly. Then, the rotation of the manual wheel 203 can drive the rotation of the rotating shaft 201, and the rotation of the rotating shaft 201 will synchronously drive the rotation of the steel coil 204. The equipment will move with the rotation of the steel coil 204, thereby adjusting the position of the equipment. The handle 202 can make it easier and more labor-saving for workers to use it. The main platform 301 can be used to support and install the upper components, and the moving block 302 and the card block 303 can be used to firmly install the jack base 3 on the equipment.

[0027] Next, the outer sleeve 401 can be used to ensure the normal operation of the internal components, and the mounting pad 402 can be used to install the components on the device. The top head 403 can be used to carry the objects that need to be carried on the top, and the mounting plate 404 can be used to stably install the insertion rod 405 and the top head 403 together. At the same time, the limiting ring 406 can be used to prevent the insertion rod 405 from moving to the outside of the outer sleeve 401 when the device is in use. At the same time, the limiting ring 406 is fixed to the inside of the outer sleeve 401 by using the annular threaded member 411 below. The button 410 can be fixedly installed by the fixing plate 407, and a plurality of sockets 413 are provided on the fixing plate 407. When the guide rod 605 of the upper elastic component 6 is inserted into the socket 413 and the button 410 is pressed, The alarm 408 below will sound an alarm, so that the workers will stop the urgent pressurization of the equipment. At the same time, a battery 412 is installed inside the alarm 408 to provide a power source for the alarm 408, and the component can be fixed and installed by using the fixed ring 409 to prevent movement. At the same time, the elastic component 6 can be fixed inside the equipment by using the upper mounting plate 601, and the spring 603 below can be prevented from moving. The spring 603 can leave a buffer space for the equipment when it is in use to protect the equipment. At the same time, the lower mounting plate 604 can be used to support the components below, and the guide rod 605 can be inserted into the jack 413 opened on the fixed plate 407 when the equipment reaches a high-pressure state during use, and the internal button 410 can be pressed to alarm.

[0028] Finally, the protective shell 5 can be installed on the equipment using the inner mounting plate 505, and the noise emitted by the equipment can be reduced using the sound insulation cotton 504. The shock-absorbing plate 503 can isolate the impact force during the startup, stop or operation of the equipment to prevent the equipment from sudden impact or vibration. The sound insulation pad 502 can be used to perform secondary noise reduction on the equipment, and the sound insulation steel plate 501 can be used to protect the internal components and reduce the noise of the equipment at the same time.

[0029] Through the above steps, the device can be fixedly installed at the desired position using the support platform 1, and the movable component 2 can be used to adjust the position of the equipment during use, which solves the problem that the existing equipment needs manpower to adjust during use, which is time-consuming and labor-intensive. At the same time, the jack base 3 can ensure the normal installation and operation of the components, and the safety pressure limiting mechanism 4 can allow the device to issue a timely warning when the pressure value of the device is too high during use to prevent damage to the device. The protective shell 5 can be used to reduce the noise of the jack to prevent the problem of excessive noise during use that may cause hearing problems for workers. The elastic component 6 can be used to reserve a buffer space for the jack during use. When the alarm is heard, there will also be a very small buffer space, which increases fault tolerance and prevents the problem of excessive pressure damaging the equipment when the alarm is heard during use.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A jack safety pressure limiting device, comprising a support platform (1), a moving component (2), a jack base (3), a safety pressure limiting mechanism (4), a protective shell (5), an elastic component (6) and an adjusting rod (7); the moving component (2) is installed on the upper end of the support platform (1); the jack base (3) is installed above the moving component (2); the safety pressure limiting mechanism (4) is installed on the upper end surface of the jack base (3); the protective shell (5) is installed on the outer layer of the safety pressure limiting mechanism (4); the elastic component (6) is installed inside the safety pressure limiting mechanism (4); and the adjusting rod (7) is arranged on the side end of the protective shell (5).

2. A jack safety pressure limiting device according to claim 1, characterized in that: The support platform (1) comprises support legs (101), a mounting chassis (102), a tabletop (103), a slide groove (104) and a clamping groove (105); a tabletop is provided inside the support platform (1); a plurality of groups of support legs (101) are installed on the lower end surface of the tabletop (103); the mounting chassis (102) is installed on each of the plurality of groups of support legs (101); a slide groove (104) is provided on the upper end surface of the tabletop (103); and two groups of clamping grooves (105) are provided on the inner side wall of the slide groove (104).

3. A jack safety pressure limiting device according to claim 1, characterized in that: The moving component (2) comprises a rotating shaft (201), a handle (202), a manual rotating wheel (203), a steel coil (204) and a rotating groove (205); the rotating shaft (201) is installed inside the sliding groove (104); a manual rotating wheel (203) is installed at one end of the rotating shaft (201); a plurality of handles (202) are installed on the manual rotating wheel (203); a plurality of steel coils (204) are installed on the rotating shaft (201); and a rotating groove (205) is formed between every two steel coils (204).

4. A jack safety pressure limiting device according to claim 3, characterized in that: The jack base (3) comprises a main platform (301), a moving block (302) and a clamping block (303); the moving block (302) is arranged on the rotating shaft (201); the clamping blocks (303) are installed on both sides of the moving block (302); and the main platform (301) is installed on the upper end surface of the moving block.

5. A jack safety pressure limiting device according to claim 3, characterized in that: The safety pressure limiting mechanism (4) comprises an outer sleeve (401), a mounting pad (402), a top head (403), a mounting plate (404), an insertion rod (405), a limiting ring (406), a fixing plate (407), an alarm (408), a fixing ring (409), a button (410), an annular threaded member (411), a battery (412) and a socket (413); the mounting pad (402) is mounted on the upper end surface of the main platform (301) by bolts; the outer sleeve (401) is mounted on the upper end of the mounting pad (402); the insertion rod (405) is mounted inside the outer sleeve (401); the upper end of the insertion rod (405) is mounted A mounting plate (404) is provided; a top head (403) is provided on the upper end surface of the mounting plate (404); a limiting ring (406) is threadedly connected to the upper end surface of the outer sleeve (401); an annular threaded member (411) is provided on the lower end surface of the limiting ring (406); a fixing plate (407) is provided on the lower end of the insertion rod; a plurality of groups of jacks (413) are provided on the fixing plate (407); buttons (410) are provided inside the plurality of groups of jacks (413); an alarm (408) is provided on the lower end surface of the fixing plate (407); a battery (412) is provided inside the alarm (408); and a fixing ring (409) is provided on the lower end surface of the alarm (408).

6. A jack safety pressure limiting device according to claim 3, characterized in that: The protective shell (5) comprises a sound insulation steel plate (501), a sound insulation pad (502), a shock absorbing plate (503), sound insulation cotton (504) and an inner layer installation plate (505); the sound insulation steel plate (501) is installed on the upper end surface of the main platform (301); the sound insulation pad (502) is installed on the inner side wall of the sound insulation steel plate (501); the shock absorbing plate (503) is installed on the inner side wall of the sound insulation pad (502); the sound insulation cotton (504) is installed on the inner side wall of the shock absorbing plate (503); and the inner layer installation plate (505) is installed on the inner side wall of the sound insulation cotton (504).

7. A jack safety pressure limiting device according to claim 5, characterized in that: The elastic component (6) comprises an upper mounting plate (601), a fixing platform (602), a spring (603), a lower mounting plate (604) and a guide rod (605); the upper mounting plate (601) is mounted below the annular threaded member (411); a plurality of fixing platforms (602) are mounted on the lower end surface of the upper mounting plate (601); springs (603) are mounted on the plurality of fixing platforms (602); dampers are mounted on both upper and lower ends of the spring (603); the lower mounting plate (604) is mounted on the lower end of the spring; and a plurality of guide rods (605) are mounted on the lower end surface of the lower mounting plate (604).

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