CN218616668U - Fixed car lifting jack track bridge of area weighing - Google Patents

Abstract

The utility model provides a fixed car lifting jack track bridge with weighing, which comprises a chassis assembly and two parallel tracks arranged on the chassis assembly, wherein a single track comprises at least one weighing track component and at least one common track component, and the weighing track component and the common track component are alternately arranged along the length direction of the track in the single track; the common rail assembly is fixedly arranged on the underframe assembly, the weighing rail assembly is arranged on the underframe assembly through a plurality of weighing modules, and a gap is reserved between the weighing rail assembly and the common rail assembly. The utility model adopts the ultrashort weighing rail component, and the deformation is small during the weighing operation; the weighing rails are completely and independently installed, no external force influence exists, and high-precision measurement data are ensured to be obtained.

Description

Fixed car lifting jack track bridge of area weighing

Technical Field

The utility model relates to a track transportation vehicles overhauls technical field, concretely relates to fixed car lifting jack track bridge of weighing in area.

Background

In recent 20 years, urban rail transit construction in China has developed rapidly. When the rail vehicle runs for a certain distance or a certain time, in order to ensure the running safety of the vehicle, major repair or advanced repair needs to be carried out in a vehicle base, and the fixed car lifting jack is important equipment for vehicle repair and is mainly used for dismounting and replacing a vehicle bogie and parts and for repairing other parts at the bottom of the vehicle.

In order to ensure that the wheel (axle) weight of the rail vehicle is uniformly distributed, the traction force and the braking force can be effectively exerted, and the running performance of the subway train is ensured, GB/T14894-2005 stipulates: the difference between the measured axle weight of each moving axle of the same locomotive and the actual average axle weight of each axle of the same locomotive should not exceed +/-2 percent; the actual wheel weight of each wheel should not differ from the average wheel weight of two wheels on a common axis by more than + -4% of the average wheel weight of two wheels on the common axis. Therefore, the vehicle weighing equipment is indispensable test equipment for large/frame maintenance operation of the subway vehicle section.

Chinese patent with application number CN201510024296.5 discloses a fixed car lifting maintenance device with whole car weighing function, which can realize weighing maintenance of rail vehicles, but has the following defects:

1) The longitudinal distance of the weighing sensors is overlarge, the requirement on the rigidity of the weighing rail is extremely high, and the stress bending of the weighing rail in the weighing process greatly influences the weighing precision;

2) The structure thereof shows: one end of the equipment fixing cover plate is fixed on the track bridge, and a connecting bolt of the equipment fixing cover plate is inevitably loosened along with the downward pressing of the weighing track during weighing, so that the initial zero position of each measurement is different;

3) The two weighing rails on the two sides are flexibly connected and are not completely independent, and the weighing precision is also influenced to a certain extent;

4) The weighing system is directly connected with the weighing beam and the lower base through the conveyor, so that the requirement on the mounting is extremely high and the requirement on the weighing precision is difficult to meet.

To sum up, the current car lifting maintenance device that possesses the function of weighing's the degree of accuracy of weighing receives the influence easily. Therefore, there is an urgent need for a fixed car lifting jack track bridge with weighing to solve the problems existing in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fixed car lifting jack track bridge of weighing aims at solving present car lifting jack and overhauls the precision of weighing of device and receives the influence easily, the not high problem of precision, and concrete technical scheme is as follows:

a fixed car lifting jack track bridge with weighing function comprises an underframe assembly and two parallel tracks arranged on the underframe assembly, wherein a single track comprises at least one weighing track assembly and at least one common track assembly, and the weighing track assembly and the common track assembly in the single track are alternately arranged along the length direction of the track; the common rail assembly is fixedly arranged on the underframe assembly, the weighing rail assembly is arranged on the underframe assembly through a plurality of weighing modules, and a gap is reserved between the weighing rail assembly and the common rail assembly.

Preferably, in the above technical scheme, the weighing module includes an upper connecting plate, a weighing sensor, a limiting component and a lower connecting plate, the weighing sensor is arranged between the upper connecting plate and the lower connecting plate, the lower connecting plate is arranged on the chassis assembly, the upper connecting plate is connected with the weighing rail component, and the limiting component is used for limiting horizontal relative displacement and longitudinal maximum distance between the upper connecting plate and the lower connecting plate.

Preferably, among the above technical scheme, spacing subassembly includes control arm and vertical locating part, the control arm level sets up and both ends are connected respectively and are connected connecting plate and lower connecting plate, connecting plate or/and chassis subassembly down are connected to vertical locating part one end, and weighing rail subassembly or/and upper junction plate are connected to its other end.

Preferably, in the above technical solution, the weighing module further includes an assembly auxiliary plate, the assembly auxiliary plate is detachably connected to the same side of the upper connecting plate and the lower connecting plate, and the assembly auxiliary plate is used for realizing relative positioning between the upper connecting plate and the lower connecting plate when the upper connecting plate and the lower connecting plate are installed.

In the above technical solution, preferably, the foundation pit further comprises a side cover plate assembly and a middle cover plate assembly, wherein the side cover plate assembly is arranged between two sides of the underframe assembly in the length direction and the edge of the foundation pit; and a middle cover plate assembly is arranged between the two parallel tracks, and a single side edge of the middle cover plate assembly in the length direction of the tracks is connected with the chassis assembly corresponding to the side edge and the common track assembly.

Preferably, in the above technical solution, the underframe assembly includes a support frame and an upper support arranged on the support frame, and the weighing rail assembly and the common rail assembly are arranged on the support frame; the both sides of single weighing rail subassembly set up the support, all leave the clearance between the last support of weighing rail subassembly and both sides, and wherein the last support that is located the outside is used for installing the side apron and constitutes, and the last support that is located the inboard is used for installing middle apron and constitutes.

Preferred among the above technical scheme, ordinary rail subassembly includes ordinary rail seat and sets up ordinary track and supporting seat on ordinary rail seat, ordinary rail seat sets up on braced frame, and shown supporting seat is located the outside of ordinary rail seat, the supporting seat is used for installing the side cover board and constitutes, the inboard of ordinary rail seat top surface is used for installing middle apron and constitutes.

Preferably, the device further comprises a positioning device arranged on the common rail assembly; the positioning device comprises a bottom plate, a pressing rod, a compression spring and a travel switch, wherein two guide rings are arranged on the bottom plate, the pressing rod is movably arranged in the two guide rings, the compression spring is sleeved on the pressing rod and located between the two guide rings, one end of the compression spring abuts against the pressing rod, the other end of the compression spring abuts against the guide rings, the lower end of the pressing rod is conical, the travel switch is arranged on the bottom plate, and a trigger point of the travel switch is provided with a roller and a lower end of the pressing rod in rolling contact.

Preferably, in the above technical scheme, the lower part of the pressure lever is sleeved with an adjusting nut which abuts against the bottom surface of the guide ring positioned below;

the travel switch is arranged on the bottom plate through the mounting plate, and the distance between the roller and the lower end of the pressure rod is changed by adjusting the mounting position of the mounting plate on the bottom plate.

Preferably among the above technical scheme, adopt waist type hole as the mounting hole, adjust the relative position between mounting hole and the screw hole that corresponds with it, the mounted position of adjusting part when realizing the assembly.

Use the technical scheme of the utility model, following beneficial effect has:

1) An ultra-short weighing rail component is adopted, so that the deformation amount is small during weighing operation; the weighing rails are completely and independently installed without any external force influence, so that high-precision measurement data are ensured to be obtained;

2) The weighing sensor is assembled with the weighing rail assembly and the underframe through an upper connecting plate and a lower connecting plate respectively, and the weighing module is of a modular structure; the flatness of the mounting surface among the weighing rail assembly, the weighing module and the chassis is controlled to be not more than 0.1mm, so that the high precision of the weighing module and the convenience of integral installation can be ensured.

3) The weighing module, the weighing rail assembly and the common rail assembly are all completely fixed and locked, so that the safety is high; the waist-shaped hole is used as the mounting hole, so that the mounting position during assembly is convenient to adjust, and the assembly precision is ensured; set up positioner, parking precision is high, travel switch protectiveness is good, the debugging installation of being convenient for.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is an isometric view of a fixed car lifting jack track bridge;

FIG. 2 is a longitudinal cross-sectional view of a fixed car lifting frame rail bridge;

FIG. 3 is a side view of a fixed car lifting frame rail bridge;

FIG. 4 is a top plan view of a fixed car lifting jack track bridge;

FIG. 5 is an isometric view of the chassis assembly;

FIG. 6 is a schematic structural view of a hidden side cover plate assembly and a hidden middle cover plate assembly of a track bridge of a fixed car lifting jack;

FIG. 7 is a schematic view of the structure of the weighing module;

FIG. 8 is a schematic structural view of the weigh rail assembly;

FIG. 9 is a schematic view of a common rail assembly;

FIG. 10 is a front view of the positioning device;

FIG. 11 is a top view of the positioning device;

wherein, 1, a weighing rail component, 1-1, a weighing rail seat, 1-2, a weighing rail, 2, a common rail component, 2-1, a common rail seat, 2-2, a common rail, 2-3, a supporting seat, 3, a weighing module, 3-1, an upper connecting plate, 3-2, a weighing sensor, 3-3, a control arm, 3-4, a longitudinal limiting piece, 3-5, an assembly auxiliary plate, 3-6, a lower connecting plate, 4, a bottom frame component, 4-1, a cross beam, 4-2, a longitudinal beam, 4-3, a lower supporting leg, 4-4, an upper support, 5, a side cover plate component, 5-1 and a side cover plate I, 5-2 parts of side cover plates II, 5-3 parts of side cover plates III, 5-4 parts of side cover plates IV, 5-5 parts of movable cover plates, 5-6 parts of operation box cover plates, 5-7 parts of ventilation openings, 6 parts of middle cover plates, 6-1 parts of middle cover plates I, 6-2 parts of middle cover plates II, 6-3 parts of middle cover plates III, 6-4 parts of middle cover plates IV, 7 parts of positioning devices, 7-1 parts of bottom plates, 7-2 parts of pressure bars, 7-3 parts of compression springs, 7-4 parts of guide rings, 7-5 parts of adjusting nuts, 7-6 parts of stop gaskets, 7-7 parts of travel switches, 7-8 parts of mounting plates, 8 parts of wheels.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention will be described. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1:

referring to fig. 1-11, a fixed car lifting machine track bridge with weighing, in particular a fixed car lifting machine track bridge for a rail vehicle, is arranged in a foundation pit; the single track comprises at least one weighing track assembly 1 and at least one common track assembly 2, wherein the weighing track assemblies 1 and the common track assemblies 2 in the single track are alternately arranged along the length direction of the track; the common rail assembly 2 is fixedly arranged on the underframe assembly 4, the weighing rail assembly 1 is arranged on the underframe assembly 4 through the weighing modules 3, a gap is reserved between the weighing rail assembly 1 and the common rail assembly 2, the weighing rail assembly 1 can independently move under the gravity of a rail vehicle, and the weighing accuracy is prevented from being influenced due to the fact that the weighing rail assembly is connected with other components.

Referring to fig. 1-6, the single rail in this embodiment includes two weigh rail assemblies and two common rail assemblies, as will be appreciated by those skilled in the art, which are determined based on the number of actual pairs of wheels 8 of the rail vehicle.

Referring to fig. 7, the weighing module 3 comprises an upper connecting plate 3-1, a weighing sensor 3-2, a limiting assembly and a lower connecting plate 3-6, the weighing sensor 3-2 is arranged between the upper connecting plate 3-1 and the lower connecting plate 3-6, namely, one end of the weighing sensor is connected with the upper connecting plate, the other end of the weighing sensor is connected with the lower connecting plate, the lower connecting plate 3-6 is arranged on the chassis assembly 4, the upper connecting plate 3-1 is connected with the weighing rail assembly 1, and the limiting assembly is used for limiting the horizontal relative displacement and the longitudinal maximum distance between the upper connecting plate and the lower connecting plate.

Preferably, the limiting assembly comprises a control arm 3-3 and a longitudinal limiting part 3-4, the control arm 3-3 is horizontally arranged, two ends of the control arm are respectively connected with an upper connecting plate 3-1 and a lower connecting plate 3-6, specifically, lug plates are arranged on the upper connecting plate and the lower connecting plate, the control arm is respectively connected with the two lug plates, one end of the longitudinal limiting part 3-4 is connected with the lower connecting plate 3-6 or/and the underframe assembly 4, and the other end of the longitudinal limiting part is connected with the weighing rail assembly 1 or/and the upper connecting plate 3-1.

Specifically, the longitudinal limiting part is a limiting screw, in this embodiment, one end of the limiting screw is connected to the lower connecting plate (the two are locked by a nut), and the other end of the limiting screw is connected to the weighing rail assembly 1 (the two are locked by a nut). The maximum distance between the upper connecting plate and the lower connecting plate in the longitudinal direction is limited through the matching of the limiting screw and the nut, and meanwhile, the mutual approaching between the upper connecting plate and the lower connecting plate under the gravity of the railway vehicle is not influenced, namely, the weighing function is not influenced.

Further, the weighing module 3 further comprises an assembly auxiliary plate 3-5, the assembly auxiliary plate 3-5 is detachably connected with the same side of the upper connecting plate and the lower connecting plate (specifically, connected through bolts), and the assembly auxiliary plate 3-5 is used for realizing the relative positioning between the upper connecting plate and the lower connecting plate when the upper connecting plate and the lower connecting plate are installed; namely, when the upper connecting plate and the lower connecting plate are installed, the relative position between the upper connecting plate and the lower connecting plate is fixed well through the assembling auxiliary plate 3-5, and the assembling auxiliary plate 3-5 is disassembled after the assembling is finished.

Four weighing modules 3 are uniformly arranged below the single weighing rail assembly 1 in the embodiment. In the embodiment, the precision grade of the weighing sensor 3-2 is C3 OIML, and the measurement precision is 0.02%.

Referring to fig. 1-4, the fixed car lifting machine track bridge with weighing further comprises a side cover plate assembly 5 and a middle cover plate assembly 6, which are used for covering the surface of the car lifting machine foundation pit, allowing operators to pass through, and the like; side cover plate assemblies 5 are arranged between two sides of the underframe assembly 4 in the length direction and the edge of the foundation pit; and a middle cover plate assembly 6 is arranged between the two parallel tracks, and a single side edge of the middle cover plate assembly 6 along the length direction of the tracks is connected with the underframe assembly 4 corresponding to the side edge and the common track assembly 2.

Specifically, referring to fig. 5 and 6, the underframe assembly 4 comprises a support frame and an upper support 4-4 arranged on the support frame, the support frame comprises a cross beam 4-1, a longitudinal beam 4-2 and a lower support leg 4-3, wherein the two longitudinal beams are arranged in parallel, the two cross beams 4-1 are arranged between the two longitudinal beams in parallel, so that a square frame is formed, the lower support leg is arranged on the square frame, and the lower support leg is a support member for the track bridge of the car lifting jack to contact with the ground. The transverse beam or/and the longitudinal beam is/are provided with a window, so that the parts can be conveniently assembled; and a junction box of the weighing module is arranged on the side surface of the longitudinal beam.

The weighing rail assembly 1 and the common rail assembly 2 are arranged on the supporting frame, specifically, the weighing rail assembly is arranged on the supporting frame through a weighing module, upper supports 4-4 are arranged on two sides of a single weighing rail assembly 1, gaps are reserved between the weighing rail assembly 1 and the upper supports 4-4 on the two sides, the upper supports 4-4 on the outer side are used for installing side cover plate assemblies 5, and the upper supports 4-4 on the inner side are used for installing middle cover plate assemblies 6.

Referring to fig. 9, the common rail assembly 2 includes a common rail seat 2-1, and a common rail 2-2 and a support seat 2-3 disposed on the common rail seat 2-1, the common rail seat 2-1 is disposed on a support frame, the support seat is disposed on an outer side of the common rail seat, the support seat 2-3 is used for mounting a side cover plate assembly 5, an inner side of a top surface of the common rail seat is used for mounting a middle cover plate assembly 6, and the common rail 2-2 is disposed on an outer side of a top surface of the common rail seat 2-1.

Referring to fig. 8, the weighing rail assembly 1 comprises a weighing rail seat 1-1 and a weighing rail 1-2 arranged on the weighing rail seat 1-1, and the lower bottom surface of the weighing rail seat 1-1 is connected with a weighing module 3; the common rails 2-2 and the weighing rails 1-2 are arranged in turn and alternately to form a rail for the vehicle to run.

Referring to fig. 4, the side cover plate assembly 5 in this embodiment includes a first side cover plate 5-1, a second side cover plate 5-2, a third side cover plate 5-3, and a fourth side cover plate 5-4, which are sequentially disposed along the length direction of the track, wherein two sides of the first side cover plate 5-1 and the third side cover plate 5-3 are respectively mounted on the outer upper support 4-4 and the edge of the foundation pit, and two sides of the second side cover plate 5-2 and the fourth side cover plate 5-4 are respectively mounted on the support base 2-3 and the edge of the foundation pit.

In the embodiment, the middle cover plate assembly 6 comprises a first middle cover plate 6-1, a second middle cover plate 6-2, a third middle cover plate 6-3 and a fourth middle cover plate 6-4 which are sequentially arranged along the length direction of the track, wherein two sides of the first middle cover plate and the third middle cover plate are respectively arranged on two upper supports 4-4 on the inner side, and two sides of the second middle cover plate and the fourth middle cover plate are respectively arranged on the inner sides of the top surfaces of two common rail seats.

Referring to fig. 2, 10 and 11, the fixed car lifting machine track bridge with weighing further comprises a positioning device 7 arranged on the common rail assembly 2; the positioning device is specifically arranged on a common rail seat and used for realizing accurate parking of the rail vehicle. In the embodiment, two positioning devices are arranged, namely one positioning device is arranged on each common rail assembly, and the phenomenon that a fixed car lifting jack rail bridge cannot normally work due to failure of a single positioning device is prevented by adopting redundancy arrangement.

Specifically, the positioning device 7 comprises a bottom plate 7-1, a pressure rod 7-2, a compression spring 7-3 and a travel switch 7-7, wherein two guide rings 7-4 are arranged on the bottom plate 7-1, the pressure rod 7-2 is movably arranged in the two guide rings 7-4, the compression spring 7-3 is sleeved on the pressure rod and is positioned between the two guide rings, one end of the compression spring props against the pressure rod, the other end of the compression spring props against the guide rings, the lower end of the pressure rod is conical, the travel switch 7-7 is arranged on the bottom plate 7-1, and a trigger point of the travel switch 7-7 is provided with a roller which is in rolling contact with the lower end of the pressure rod.

Specifically, the compression rod is a stepped rod, wherein the upper part is large, the lower part is small, the upper end of the compression spring props against the stepped surface of the compression rod, the lower end of the compression spring props against a stop gasket 7-6 positioned on a guide ring below the compression spring, the compression rod can be pressed downwards to trigger a travel switch when a wheel passes through the travel switch, and the compression spring drives the compression rod to reset after a vehicle passes through the travel switch.

Preferably, the lower part of the compression bar 7-2 is sleeved with an adjusting nut 7-5, and the adjusting nut 7-5 props against the bottom surface of the guide ring 7-4 positioned below; the initial position of the pressure lever in the vertical direction can be adjusted by screwing the adjusting nut.

Because the distance between the maximum stroke and the trigger stroke of the travel switch 7-7 is generally smaller, if the pressure lever is adopted to directly press down and trigger, the condition that the travel switch 7-7 cannot be triggered or is crushed by overvoltage easily occurs.

Therefore, in the embodiment, the travel switch 7-7 is arranged on the bottom plate 7-1 through the mounting plate 7-8, and the distance between the roller and the lower end of the pressure rod is changed by adjusting the mounting position of the mounting plate on the bottom plate; the distance between the travel switch 7-7 and the pressure rod 7-2 can be adjusted to be between the triggering stroke and the failure stroke, and then the vertical displacement of the vertically downward pressing rod 7-2 is converted into the constant transverse triggering displacement, so that the travel switch 7-7 can be prevented from being damaged by pressure on the premise of ensuring the triggering of the travel switch 7-7.

Furthermore, in the embodiment, the waist-shaped hole is used as the mounting hole, and the relative position between the mounting hole and the corresponding threaded hole is adjusted, so that the mounting position of the part is adjusted during assembly. Specifically, waist-shaped holes can be adopted between the common rail assembly 2 and the underframe assembly 4, between the side cover plate assembly 5 and the middle cover plate assembly 6 and the underframe assembly 4, and between the mounting plate 7-8 and the bottom plate 7-1 to realize the adjustment of the mounting position.

In the embodiment, the chassis assembly 4, the common rail assembly 2 and the weighing rail assembly 1 are welded to assemble parts into a whole; wherein for the part that the installation accuracy required is high, the whole processing after the welding is accomplished guarantees that the plane degree is controlled within 0.1 mm.

In the embodiment, the side cover plate assembly 5 is further provided with a movable cover plate 5-5, an operation box cover plate 5-6 and a ventilation opening 5-7, wherein the ventilation opening 5-7 is used for realizing ventilation inside the foundation pit, the movable cover plate 5-5 is used for providing an entrance for personnel to enter the foundation pit for maintenance and overhaul after being opened, and the operation box cover plate is used for providing an operation entrance related to control after being opened.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A fixed car lifting jack track bridge with weighing function is characterized by comprising an underframe assembly (4) and two parallel tracks arranged on the underframe assembly (4), wherein a single track comprises at least one weighing track assembly (1) and at least one common track assembly (2), and the weighing track assemblies (1) and the common track assemblies (2) in the single track are alternately arranged along the length direction of the track; the common rail assembly (2) is fixedly arranged on the chassis assembly (4), the weighing rail assembly (1) is arranged on the chassis assembly (4) through a plurality of weighing modules (3), and a gap is reserved between the weighing rail assembly (1) and the common rail assembly (2).

2. The fixed car lifting frame track bridge with weighing function according to claim 1, wherein the weighing module (3) comprises an upper connecting plate (3-1), a weighing sensor (3-2), a limiting assembly and a lower connecting plate (3-6), the weighing sensor (3-2) is arranged between the upper connecting plate (3-1) and the lower connecting plate (3-6), the lower connecting plate (3-6) is arranged on the underframe assembly (4), the upper connecting plate (3-1) is connected with the weighing rail assembly (1), and the limiting assembly is used for limiting the horizontal relative displacement and the longitudinal maximum distance between the upper connecting plate and the lower connecting plate.

3. The fixed car lifting machine rail bridge with weighing function according to claim 2, wherein the limiting assembly comprises a control arm (3-3) and a longitudinal limiting piece (3-4), the control arm (3-3) is horizontally arranged, two ends of the control arm are respectively connected with an upper connecting plate (3-1) and a lower connecting plate (3-6), one end of the longitudinal limiting piece (3-4) is connected with the lower connecting plate (3-6) or/and a chassis assembly (4), and the other end of the longitudinal limiting piece (3-4) is connected with the weighing rail assembly (1) or/and the upper connecting plate (3-1).

4. A fixed car lifting frame rail bridge with weighing according to claim 3, characterized in that said weighing module (3) further comprises an auxiliary assembly plate (3-5), said auxiliary assembly plate (3-5) being detachably connected to the same side of the upper and lower connecting plates, said auxiliary assembly plate (3-5) being adapted to enable relative positioning between the upper and lower connecting plates when they are mounted.

5. The fixed car lifting machine track bridge with weighing function according to claim 1, further comprising side cover plate assemblies (5) and a middle cover plate assembly (6), wherein the side cover plate assemblies (5) are arranged between two sides of the bottom frame assembly (4) in the length direction and the edge of a foundation pit; a middle cover plate assembly (6) is arranged between the two parallel tracks, and the single side edge of the middle cover plate assembly (6) along the length direction of the tracks is connected with the chassis assembly (4) corresponding to the side edge and the common track assembly (2).

6. A fixed car lifting frame rail bridge with weighing according to claim 5, characterized in that the underframe assembly (4) comprises a supporting frame and an upper support (4-4) arranged on the supporting frame, the weighing rail assembly (1) and the common rail assembly (2) are arranged on the supporting frame; the two sides of a single weighing rail assembly (1) are provided with upper supports (4-4), gaps are reserved between the weighing rail assembly (1) and the upper supports (4-4) on the two sides, the upper supports (4-4) located on the outer side are used for installing side cover plate assemblies (5), and the upper supports (4-4) located on the inner side are used for installing middle cover plate assemblies (6).

7. The fixed car lifting frame track bridge with weighing function as claimed in claim 6, wherein said common rail assembly (2) comprises a common rail seat (2-1) and a common rail (2-2) and a support seat (2-3) arranged on the common rail seat (2-1), said common rail seat (2-1) is arranged on a support frame, said support seat is arranged on the outer side of the common rail seat, said support seat (2-3) is used for installing a side cover plate assembly (5), and the inner side of the top surface of the common rail seat is used for installing a middle cover plate assembly (6).

8. A fixed car lifting frame rail bridge with weighing according to claim 1, further comprising a positioning device (7) provided on the common rail assembly (2); the positioning device (7) comprises a bottom plate (7-1), a pressure rod (7-2), a compression spring (7-3) and a travel switch (7-7), wherein two guide rings (7-4) are arranged on the bottom plate (7-1), the pressure rod (7-2) is movably arranged in the two guide rings (7-4), the compression spring (7-3) is sleeved on the pressure rod and is positioned between the two guide rings, one end of the compression spring props against the pressure rod, the other end of the compression spring props against the guide rings, the lower end of the pressure rod is conical, the travel switch (7-7) is arranged on the bottom plate (7-1), and a trigger point of the travel switch (7-7) is provided with a roller and the lower end of the pressure rod in rolling contact.

9. The fixed car lifting machine rail bridge with weighing function according to claim 8, characterized in that the lower part of the pressure lever (7-2) is sleeved with an adjusting nut (7-5), and the adjusting nut (7-5) is propped against the bottom surface of the guide ring (7-4) positioned below;

the travel switch (7-7) is arranged on the bottom plate (7-1) through a mounting plate (7-8), and the distance between the roller and the lower end of the pressure rod is changed by adjusting the mounting position of the mounting plate on the bottom plate.

10. A fixed car lifting frame rail bridge with weighing function as claimed in any one of claims 1-9, wherein waist-shaped holes are used as mounting holes, and the relative positions of the mounting holes and the corresponding threaded holes are adjusted to adjust the mounting positions of the parts during assembly.

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