CN220602533U - Car lifting jack parallelism detection device - Google Patents

Abstract

The utility model discloses a parallelism detection device of a car lifting jack, which belongs to the technical field of locomotive maintenance and comprises a guide assembly, a moving assembly and a detection assembly, wherein the guide assembly comprises a guide rod, the guide rod extends along the vertical direction, two upright posts of the car lifting jack are distributed on the left side and the right side of the guide rod, and the front end face and the rear end face of the two upright posts respectively form four guide surfaces; the moving assembly is arranged on the guide rod and can move along the guide rod, and comprises a supporting part and four bearing parts connected with the supporting part, wherein the supporting part is connected with the guide rod, and one bearing part is arranged on one side of each guide surface; the detection component comprises a detection part, the detection part is provided with a detection end, and the detection component can measure the distance from the detection end to the guide surface. According to the distance value between the bearing part and the guide surface and the distance value obtained by the detection component, whether the two guide surfaces positioned on the same side of the upright post are in the same plane or not can be judged, so that the four rollers are ensured to be contacted with the guide surfaces at the same time.

Description

Car lifting jack parallelism detection device

Technical Field

The utility model relates to the technical field of locomotive overhaul, in particular to a parallelism detection device of a locomotive lifting jack.

Background

Along with the rapid development of cities, urban rail transit such as motor cars and high-speed rails has become the mainstream of urban traffic development, and in order to ensure the safe operation of urban rail transit vehicles, the vehicles need to be overhauled and maintained after a period of operation, and the vehicles need to be lifted off the ground during overhauling, so that a certain space is provided for overhauling, and a car lifting machine is needed in the process, and is equipment for lifting the vehicle body from the bottom of the vehicle body.

Referring to fig. 1, the frame of the car lifting jack 100 includes two rectangular columns 120, a supporting head 110 is provided on the columns 120, four rollers 130 are installed on the supporting head 110, four guide surfaces 121 are respectively formed on front and rear end surfaces of the two columns 120, and the four rollers 130 are controlled by a motor to respectively move up and down along the four guide surfaces 121, so that the supporting head 110 is driven to move up and down. In use, the head 110 is placed at the bottom of the vehicle body, and serves to lift and lower the vehicle body.

Because of machining errors of the upright posts 120, excessive deviation of parallelism of the two upright posts 120 may occur, so that the load borne by the supporting head 110 is uneven, and one end of the supporting head is tilted, so that the four rollers 130 on the supporting head 110 cannot be contacted with the corresponding guide surfaces 121 at the same time, and potential safety hazards are caused. Therefore, in the installation or maintenance process, the parallelism of the upright 120 needs to be detected and adjusted to ensure safety. In the conventional detection device, the frame of the car lifting jack 100 is generally laid on a large platform, and the four guide surfaces 121 of the two upright posts 120 are respectively detected by using a dial indicator, but only the parallelism of the single upright post 120 relative to the ground can be measured, and the parallelism deviation between the guide surfaces 121 of the two upright posts 120 cannot be measured.

Disclosure of Invention

The utility model aims to provide a parallelism adjusting device of a car lifting jack, which is used for solving the technical problem that in the prior art, the parallelism error of a stand column of the car lifting jack is large, and rollers cannot be contacted with a guide surface at the same time.

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

a car lifting jack parallelism detection device, comprising:

the guide assembly comprises a guide rod, the guide rod extends along the vertical direction, two upright posts of the car lifting jack are distributed on the left side and the right side of the guide rod, and the front end face and the rear end face of the two upright posts respectively form four guide surfaces;

the moving assembly is arranged on the guide rod and can move along the guide rod, and comprises a supporting part and four bearing parts connected with the supporting part, wherein the supporting part is connected with the guide rod, and one bearing part is arranged on one side of each guide surface;

the detection assembly is detachably arranged on the bearing part and comprises a detection part, the detection part is provided with a detection end, and the detection assembly can measure the distance from the detection end to the guide surface.

Wherein two bearing parts positioned at the front side of the supporting part are positioned on a first horizontal straight line, and/or two bearing parts positioned at the rear side of the supporting part are positioned on a second horizontal straight line.

The movable assembly comprises two support rods extending along a horizontal straight line, the two support rods are distributed on the front side and the rear side of the support portion, and each support rod is provided with two bearing portions.

The support rod is provided with a vacuole tube, vacuoles are arranged in the vacuole tube, and the vacuoles can shift according to the levelness of the support rod.

The upper end face of the supporting rod is a mounting face extending in the horizontal direction, and the vacuole tube is arranged on the mounting face.

The detection assembly further comprises a connecting part, and the connecting part is detachably connected with the bearing part.

The connecting part is sleeved on the bearing part and can slide along the bearing part, and the connecting part is magnetically connected with the bearing part.

The lower part of the bearing part forms a guide end, the sectional area of the guide end is gradually reduced from top to bottom, and the position of the connecting part corresponding to the guide end forms a guide groove with the sectional area gradually reduced from top to bottom.

The support part comprises two limiting ends, the two limiting ends are distributed on the left side and the right side of the guide rod, moving wheels are arranged on the limiting ends, and the moving wheels can roll along the surface of the upright post.

The detection assembly is provided with four groups, and each bearing part is provided with one group of detection assemblies.

The utility model has the beneficial effects that:

when the parallelism detection device of the car lifting jack is used, the movable assembly moves between the first position and the second position along the guide rod, the detection assembly can acquire the distance from the detection end to the corresponding guide surface, if a plurality of distance values acquired by the corresponding guide surface are the same, the guide surface extends along the vertical direction, otherwise, the guide surface needs to be adjusted, and therefore the fact that each guide surface extends along the vertical direction can be guaranteed; according to the distance value between the bearing part and the guide surface and the distance value obtained by the detection component, whether the two guide surfaces positioned at the front side are in the same plane or not can be judged, whether the two guide surfaces positioned at the rear side are in the same plane or not can also be judged, and the guide surfaces are adjusted according to requirements so as to ensure that the two guide surfaces positioned at the front side are in the same plane and the two guide surfaces positioned at the rear side are in the same plane, thereby ensuring that the four rollers are contacted with the guide surfaces simultaneously.

Drawings

FIG. 1 is a schematic diagram of a structure of a trolley and a bracket in cooperation with each other according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of cooperation of a car lifting jack and a car lifting jack parallelism detecting device provided by the embodiment of the utility model;

fig. 3 is a schematic diagram of a part of a structure of a car lifting jack and a device for detecting parallelism of the car lifting jack according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a moving assembly and a detecting assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a support bar according to an embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of a detection assembly according to an embodiment of the present utility model;

fig. 7 is a schematic structural view of a supporting portion according to an embodiment of the present utility model.

In the figure:

100. a car lifting jack; 110. a bracket; 120. a column; 121. a guide surface; 130. a roller;

1. a guide assembly; 11. a guide rod;

2. a moving assembly; 21. a support part; 211. a moving wheel; 212. a limiting hole; 22. a carrying part; 23. a support rod; 24. a vacuole tube;

3. a detection assembly; 31. a detection unit; 311. a dial indicator; 312. a probe; 32. and a connecting part.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Referring to fig. 2 to 4, the car lifting jack parallelism detecting device comprises a guiding component 1, a moving component 2 and a detecting component 3, wherein the guiding component 1 comprises a guiding rod 11, the guiding rod 11 extends along the vertical direction, two upright posts 120 of the car lifting jack 100 are distributed on the left side and the right side of the guiding rod 11, and front end surfaces and rear end surfaces of the two upright posts 120 respectively form four guiding surfaces 121; the moving assembly 2 is arranged on the guide rod 11 and can move along the guide rod 11, the moving assembly 2 comprises a supporting part 21 and four bearing parts 22 connected with the supporting part 21, the supporting part 21 is connected with the guide rod 11, and one bearing part 22 is arranged on one side of each guide surface 121; the detection assembly 3 is detachably arranged on the bearing part 22, the detection assembly 3 comprises a detection part 31, the detection part 31 is provided with a detection end, and the detection assembly 3 can measure the distance from the detection end to the guide surface 121.

When in use, the moving component 2 moves between the first position and the second position along the guide rod 11, the detecting component 3 can acquire the distance from the detecting end to the corresponding guide surface 121, if a plurality of distance values acquired by the corresponding guide surface 121 are the same, the guide surface 121 extends along the vertical direction, otherwise, the guide surface 121 needs to be adjusted, and by adopting the mode, each guide surface 121 can be ensured to extend along the vertical direction; according to the distance value between the bearing part 22 and the guide surface 121 and the distance value obtained by the detection component 3, it can be determined whether the two guide surfaces 121 on the front side are in the same plane, or whether the two guide surfaces 121 on the rear side are in the same plane, and the guide surfaces 121 are adjusted according to the requirement, so that the two guide surfaces 121 on the front side are in the same plane, and the two guide surfaces 121 on the rear side are in the same plane, thereby ensuring that the four rollers 130 are simultaneously contacted with the guide surfaces 121.

The two guide surfaces 121 on the front side are defined as a first guide surface 121 and a second guide surface 121, respectively, and the two guide surfaces 121 on the rear side are defined as a third guide surface 121 and a fourth guide surface 121, respectively. For the first guide surface 121, the distance value acquired by the detecting component 3 is L1, for the second guide surface 121, the distance value acquired by the detecting component 3 is L2, for the third guide surface 121, the distance value acquired by the detecting component 3 is L3, and for the fourth guide surface 121, the distance value acquired by the detecting component 3 is L4. It can be understood that, during the movement of the moving assembly 2, the detecting assembly 3 obtains a plurality of distance values corresponding to one guide surface 121, and if the plurality of L1 are the same, it means that the first guide surface 121 extends along the vertical direction; if the plurality of L2's are all the same, it means that the second guiding surface 121 extends along the vertical direction; if the plurality of L3 are the same, it means that the third guide surface 121 extends in the vertical direction; if the plurality of L4 are the same, it means that the fourth guide surface 121 extends in the vertical direction.

The bearing portion 22 corresponding to the first guide surface 121 is defined as a first bearing portion 22, and the bearing portion 22 corresponding to the second guide surface 121 is defined as a second bearing portion 22. When the first bearing portion 22 and the second bearing portion 22 are located on the same horizontal line, the distance values obtained by the detecting assembly 3 are compared, and if the plurality of L1 s and the plurality of L2 s are equal, it means that the first guiding surface 121 and the second guiding surface 121 are located in the same plane.

When the first bearing portion 22 and the second bearing portion 22 are located in different vertical planes, the distance between the first guiding surface 121 and the first bearing portion 22 is H1, the distance between the second guiding surface 121 and the second bearing portion 22 is H2, and a difference h0=h1-H2 exists between H1 and H2, and the difference H0 is a constant value. At this time, if the difference between L1 and L2 is equal to H0, it is considered that the first guide surface 121 and the second guide surface 121 are located in the same plane, that is, the parallelism of the first guide surface 121 and the second guide surface 121 is not deviated.

The detection process of the third guide surface 121 and the fourth guide surface 121 is the same as that described above, and will not be described again.

For convenience of operation and judgment, the two bearing portions 22 located on the front side of the supporting portion 21 are located on the first horizontal line, and/or the two bearing portions 22 located on the rear side of the supporting portion 21 are located on the second horizontal line. In the present embodiment, the two bearing portions 22 located on the front side of the supporting portion 21 are on the first horizontal line, and the two bearing portions 22 located on the rear side of the supporting portion 21 are on the second horizontal line. Therefore, the bearing parts 22 on the same side of the supporting part 21 are in the same plane, and when in measurement, whether the parallelism of the two guide surfaces 121 is deviated can be judged by only comparing the distance values obtained by the detection assemblies 3 on different bearing parts 22.

In order to ensure that the two bearing parts 22 on the same side of the supporting part 21 are on the same horizontal line, the moving assembly 2 includes two supporting rods 23 extending along the horizontal line, the two supporting rods 23 are distributed on the front and rear sides of the supporting part 21, and two bearing parts 22 are formed on each supporting rod 23. The support rod 23 is convenient for processing and production, can ensure that the two bearing parts 22 on the same side are positioned on the same horizontal line, and is convenient for forming the two bearing parts 22.

In this embodiment, the cross-sectional shape of the support rod 23 is rectangular, and four faces of the support rod 23 with a rectangular cross-section are all planar, which is convenient for measuring the distance between the bearing portion 22 and the guide surface 121 and for installing and arranging the detection assembly 3. In some embodiments, a support bar 23 of circular cross section may also be provided.

Referring to fig. 5, further, a bubble tube 24 is provided on the support rod 23, and bubbles are provided in the bubble tube 24, and can be displaced according to the levelness of the support rod 23. So that it can be judged whether the vacuole is in a horizontal position by observing whether it is deviated or not, thereby ensuring that the two bearing parts 22 on each support bar 23 are positioned on the same horizontal straight line. Meanwhile, since the support bar 23 is connected to the support portion 21, it is possible to observe whether the vacuole is deviated or not when the support portion 21 moves along the guide bar 11, so as to ensure the level of the support portion 21 when in use, and ensure the detection accuracy.

Specifically, the bubble tube 24 is divided into three parts by graduation marks in the horizontal direction, and when the supporting rod 23 is in the horizontal state, the bubbles are located at the middle part of the bubble tube 24, and when the supporting rod 23 is in the inclined state, the bubbles are moved to the parts on both sides of the bubble tube 24. Wherein, the up end of bracing piece 23 is along the installation face of horizontal direction extension, and vacuole tube 24 sets up on the installation face to the level of vacuole of being convenient for places, measures the levelness of bracing piece 23 more accurately. Since the support rod 23 is a common device in the mechanical field, detailed structure and principle thereof will not be described herein.

The support bar 23 and the tonoplast tube 24 may be replaced by an existing level.

Referring to fig. 6, regarding the detecting portion 31 of the detecting assembly 3, in this embodiment, the detecting portion 31 includes a dial indicator 311 and a probe 312, the dial indicator 311 is provided with the probe 312, the tip of the probe 312 forms the detecting end to contact with the guide surface 121, the tip of the probe 312 has elasticity, and can stretch and retract, and the reading of the dial indicator 311 records the contact distance between the tip of the probe 312 and the guide surface 121, so that the parallelism of the guide surface 121 can be determined. Since the dial indicator 311 is a device commonly used in the mechanical field, detailed structure and principle thereof will not be described herein. In some embodiments, the distance between the detection end and the guide surface 121 may also be measured by a laser range finder, where the detection end does not need to contact the guide surface 121, and the detection end may be spaced from the guide surface 121.

In addition, the detecting assembly 3 further includes a connecting portion 32, and the connecting portion 32 is detachably connected to the carrying portion 22. Facilitating the disassembly and assembly of the detection assembly 3 before and after the detection is completed. Specifically, the connecting portion 32 is sleeved on the carrying portion 22 and can slide along the carrying portion 22, and the connecting portion 32 is magnetically connected with the carrying portion 22. The magnetic attraction connection can play a role in locking, and the connection part 32 can be fixed due to the magnetic attraction during measurement, so that the connection part 32 is prevented from shifting in the moving process of the detection assembly 3 along the guide rod 11, and the detection result is prevented from being influenced. In addition, generally speaking, the guide surface 121 has a larger area, and the detection end of the detection assembly 3 has a smaller detection range at a certain point, so that there are more detection dead zones, and therefore, the connection portion 32 is sleeved on the bearing portion 22 and can slide along the bearing portion 22, so that the detection assembly 3 can detect multiple positions of the guide surface 121, and the detection accuracy is improved.

Specifically, in use, taking the first guide surface 121 as an example, the moving assembly 2 is moved from the first position to the second position along the guide rod 11, the detecting assembly 3 obtains the distance value L11 from the detecting end to the first guide surface 121, after the detection is completed, the connecting portion 32 is slid a certain distance along the horizontal direction, then the moving assembly 2 is moved from the first position to the second position along the guide rod 11, the detecting assembly 3 obtains the distance value L12 from the detecting end to the first guide surface 121, the measurement is repeated n times according to the method, the distance value L1n from the detecting end to the first guide surface 121 each time is recorded, and if the measured values L11 to L1n are the same, the first guide surface 121 can be considered to be vertical.

The detection process of the second guide surface 121, the third guide surface 121 and the fourth guide surface 121 is the same as that described above, and will not be described again here.

In this embodiment, since the connection portion is sleeved on the bearing portion 22 and can slide along the bearing portion 22, in order to facilitate the movement of the connection portion 32, a guiding end is formed at a lower portion of the bearing portion 22, a sectional area of the guiding end gradually decreases from top to bottom, and a guiding groove with a sectional area gradually decreasing from top to bottom is formed at a position corresponding to the guiding end on the connection portion 32. Therefore, the contact area between the bearing part 22 and the connecting part 32 is small, the friction force during movement is reduced, and the connecting part 32 is convenient to move on the bearing part 22.

Referring to fig. 7, the supporting portion 21 includes two limiting ends which are distributed on the left and right sides of the guide bar 11, and moving wheels 211 are provided on the limiting ends, and the moving wheels 211 can roll along the surface of the upright 120. The limiting ends on the left side and the right side start to position left and right, so that the support part 21 is prevented from rotating when moving along the guide rod 11, the stability of the support part 21 is improved, and the accuracy of a measurement result is ensured. The moving wheel 211 reduces friction between the supporting portion 21 and the surface of the upright 120, so that the supporting portion 21 can move along the guide bar 11.

In this embodiment, the supporting portion 21 is a rectangular parallelepiped supporting plate, and two moving wheels 211 are arranged at intervals on both sides of the supporting plate. In general, the driving assembly is required to drive the supporting plate to move along the guide rod 11, and since the driving assembly can vibrate when started, the driving assembly may drive the supporting plate to vibrate, so that the reading of the detecting assembly 3 is deviated, and therefore, a vibration reduction piece is arranged between the supporting plate and the moving wheel 211, so as to achieve a vibration reduction effect, ensure the stability of the supporting portion 21, and ensure the detection precision.

The car lifting jack parallelism detecting device further comprises a driving assembly, and the driving assembly is used for driving the supporting portion 21 to move along the guide rod 11. In some embodiments, an air cylinder is selected as the driving component, and the air cylinder is connected with the supporting portion 21 and drives the supporting portion 21 to move. In this embodiment, the driving assembly is a screw-nut pair, specifically, including motor and nut, limiting hole 212 has been seted up at the supporting part 21 middle part, and guide bar 11 wears to locate in the limiting hole 212, and the nut is established in the bottom of supporting part 21, and is fixed with supporting part 21 through 6 bolts, sets up the screw thread on the surface of guide bar 11, nut and guide bar 11 threaded connection, and the top at guide bar 11 is established to the motor, thereby motor drive guide bar 11 rotates drive supporting part 21 and reciprocates along guide bar 11.

In the parallelism detecting device for the car lifting jack provided by the embodiment, when the parallelism detecting device is installed, the supporting head 110 is firstly removed, and the guide rod 11 is installed between the two upright posts 120, so that the guide rod 11 is ensured to extend along the vertical direction. And then the detection component 3 and the driving component are arranged at corresponding positions.

The number of the detecting components 3 can be one group or a plurality of groups, and can be selected according to actual operation conditions.

When only one group of detection assemblies 3 is arranged, one guide surface 121 is selected as a reference surface, the detection assemblies 3 are arranged on the bearing parts 22 corresponding to the reference surface, the supporting parts 21 are adjusted to the first position, the detection ends of the detection assemblies 3 are opposite to the guide surfaces 121, initial detection values L10 are recorded, the lead screw nuts drive the supporting parts 21 to move from the first position to the second position at a constant speed, in the process, the detection assemblies 3 acquire data every few seconds, the detection values L11, L12 and L13 … … are recorded, and the data are transmitted to a computer. Analysis of the transmitted data indicates that the sensed guide surface 121 extends in a vertical direction if the readings of the sensing assembly 3 at any location are equal, or else, adjustment of the reference surface is required until the readings of the sensing assembly 3 at any location are equal. And then, the detection assembly 3 is taken down and sequentially installed on the other three bearing parts 22 respectively, the operation is repeated, measurement and adjustment are carried out until the readings of the detection assembly 3 on the four guide surfaces 121 are equal, and the parallelism of the four guide surfaces 121 meets the requirement and no deviation exists.

When two groups of detection assemblies 3 are arranged, one guide surface 121 is selected as a reference surface, one detection assembly 3 detects the reference surface, the other detection assembly 3 detects any guide surface 121 except the reference surface, after detection is finished, the two groups of detection assemblies 3 are disassembled to detect the remaining two guide surfaces 121, data are compared, whether the parallelism is deviated or not is judged, until the readings of the detection assemblies 3 on the four guide surfaces 121 are equal, the parallelism of the four guide surfaces 121 meets the requirement, and no deviation exists.

When three sets of detection assemblies 3 are provided, the operation method is the same as that described above, and will not be repeated.

When four groups of detection assemblies 3 are arranged, a group of detection assemblies 3 are arranged on each bearing part 22, so that the detection efficiency is higher, and as a group of detection assemblies 3 are arranged on each bearing part 22, the detection data of four guide surfaces 121 can be obtained simultaneously only by moving the support part 21 once from the first position to the second position, and the detection efficiency is high.

When five or more groups of detection assemblies 3 are provided, multiple groups of detection assemblies 3 can be provided on the same bearing part 22, so that the same guide surface 121 can be subjected to finer detection by the multiple groups of detection assemblies 3, and higher accuracy is achieved.

When there are multiple groups of detection assemblies 3, there are multiple arrangements regarding the number of detection assemblies 3 that can be set on each carrying portion 22, which will not be described herein, and the detection assemblies can be set according to practical situations.

In this embodiment, the dial indicator 311 is selected as the detection component 3, and when in use, the tip of the probe 312 of the dial indicator 311 is abutted against the guide surface 121 and zeroed, so that more accurate data is obtained. In some embodiments, the measurement may also be performed using a laser rangefinder, where the detection end of the laser rangefinder may be used to measure the distance by the laser emitted from the detection end without contacting the guide surface 121.

It should be noted that, in the above description of the theoretical situation of the reading of the parallelism determination, in the actual detection field, due to various influencing factors such as machining errors and operation errors, a certain error range may be set for the reading of the parallelism determination, for example, if the distance between the detection end and the guide surface 121 is within-0.05 cm to +0.05cm, the parallelism may be considered to be within a reasonable range.

The above embodiments merely illustrate the basic principle and features of the present utility model, and the present utility model is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. Car lifting jack parallelism detection device, characterized in that includes:

the guide assembly (1) comprises a guide rod (11), the guide rod (11) extends along the vertical direction, two upright posts (120) of the car lifting jack (100) are distributed on the left side and the right side of the guide rod (11), and four guide surfaces (121) are respectively formed on the front end face and the rear end face of each upright post (120);

the moving assembly (2) is arranged on the guide rod (11) and can move along the guide rod (11), the moving assembly (2) comprises a supporting part (21) and four bearing parts (22) connected with the supporting part (21), the supporting part (21) is connected with the guide rod (11), and one bearing part (22) is arranged on one side of each guide surface (121);

the detection assembly (3), the detection assembly (3) can be dismantled and set up on the carrier part (22), the detection assembly (3) is including detection portion (31), detection portion (31) have the detection end, detection assembly (3) can measure the detection end extremely the distance of guide surface (121).

2. The car-lifting jack parallelism detection device according to claim 1, characterized in that two of the bearing parts (22) located on the front side of the support part (21) are located on a first horizontal line and/or two of the bearing parts (22) located on the rear side of the support part (21) are located on a second horizontal line.

3. The car lifting jack parallelism detection device according to claim 2, wherein the moving assembly (2) comprises two support rods (23) extending along a horizontal straight line, the two level support rods (23) are distributed on the front side and the rear side of the support portion (21), and two bearing portions (22) are formed on each level support rod (23).

4. A car lifting jack parallelism detection device according to claim 3, characterized in that a vacuole tube (24) is arranged on the support rod (23), a vacuole is arranged in the vacuole tube (24), and the vacuole can be shifted according to the levelness of the support rod (23).

5. The car lifting jack parallelism detection device according to claim 4, wherein the upper end face of the support rod (23) is a mounting face extending in the horizontal direction, and the liquid bubble tube (24) is arranged on the mounting face.

6. The car-lifting jack parallelism detection device according to claim 1, characterized in that the detection assembly (3) further comprises a connection portion (32), the connection portion (32) being detachably connected with the carrying portion (22).

7. The car lifting jack parallelism detection device according to claim 6, wherein the connecting portion (32) is sleeved on the bearing portion (22) and can slide along the bearing portion (22), and the connecting portion (32) is magnetically connected with the bearing portion (22).

8. The device for detecting parallelism of a car lifting jack according to claim 7, wherein a lower portion of the bearing portion (22) forms a guide end, a sectional area of the guide end gradually decreases from top to bottom, and a position on the connecting portion (32) corresponding to the guide end forms a guide groove, the sectional area of which gradually decreases from top to bottom.

9. The car lifting jack parallelism detection device according to claim 1, wherein the supporting portion (21) comprises two limiting ends, the two limiting ends are distributed on the left side and the right side of the guide rod (11), moving wheels (211) are arranged on the limiting ends, and the moving wheels (211) can roll along the surface of the upright post (120).

10. The car-lifting jack parallelism detection device according to any one of claims 1 to 9, characterized in that the detection assemblies (3) are provided in four groups, one group of detection assemblies (3) being provided on each of the carrying parts (22).