CN201600215U - Force measuring wheel set static calibration test bench - Google Patents

Abstract

The utility model discloses a test bench for static calibration of a force-measuring wheel set, which comprises: a load-bearing base; The devices are respectively adjustably connected to the shaft ends of the force measuring wheel pair; a pair of vertical force calibration bearing devices are arranged above the bearing base and respectively located inside the force measuring wheel pair positioning device, each vertical The load-bearing devices for force calibration are respectively movably connected to the bottom of the force-measuring wheelset, and each has a force-measuring sensor; a loading device capable of adding or deloading the force-measuring wheelset. The utility model can be applied to calibration and positioning of various types of force-measuring wheel sets through a pair of force-measuring wheel-set positioning devices, and has wide adaptability.

Description

Force measuring wheel set static calibration test bench

technical field

The utility model relates to a test device for static calibration of a force-measuring wheel set of a locomotive, in particular to a static calibration test bench for a force-measuring wheel set, which is mainly used for the force-measuring wheel set to bear vertical force and its The measurement of the output relationship is determined.

Background technique

The dynamometer wheel set static calibration test bench is a test equipment for the static calibration of the dynamometer wheel set of the rolling stock, which is used to measure the vertical force and lateral force of the interaction between the wheel and the rail. The ratio of the lateral force to the vertical force is what we commonly call the derailment coefficient, which is one of the important indicators for evaluating the safety performance of rolling stock.

At present, the relevant test equipment for static calibration of the force-measuring wheel set includes a bearing base and a hydraulic system. Affect the accuracy of the calibration results of the force measuring wheel set.

In addition, due to the different types of force-measuring wheel sets, the bearing sizes are different. In the related force-measuring wheel set static calibration test equipment, each wheel set needs to be equipped with a kind of tooling, so a variety of tooling is required to adapt to different types. The force-measuring wheel set makes the cost higher and inconvenient to use.

Therefore, it is necessary to provide a new type of static calibration test bench for force-measuring wheelset to overcome the above-mentioned defects.

Utility model content

The purpose of the utility model is to provide a test bench for static calibration of force-measuring wheelsets, which can be applied to various types of force-measuring wheelsets through a pair of force-measuring wheelset positioning devices, and has wide adaptability.

Above-mentioned purpose of the utility model can adopt following technical scheme to realize:

A static calibration test bench for a force-measuring wheel set, which includes: a load-bearing base; a pair of force-measuring wheel-set positioning devices, which are arranged on the left and right sides above the load-bearing base, and each force-measuring wheel set positioning device can be adjusted separately Connected to the axle ends of the force-measuring wheel set; a pair of vertical force calibration bearing devices, which are arranged above the bearing base and respectively located inside the force-measuring wheel set positioning device, each vertical force calibration bearing device They are respectively movably connected to the bottom of the force-measuring wheel set, and each has a force-measuring sensor; a loading device capable of loading and unloading the force-measuring wheel set.

In a preferred embodiment, each of the force-measuring wheelset positioning devices includes a gantry loading frame, and the gantry loading frame includes two interlocking columns, each column has an upper column and a lower column connected up and down, the There is a fixed pin between the upper and lower columns and an extractable movable pin located below the fixed pin. When the movable pin is pulled out, the upper column can rotate outward around the fixed pin; each gantry loading frame The inner side of at least one of the lower columns is provided with a rotation limit stopper that limits the rotation angle of the upper column.

In a preferred embodiment, each of the force-measuring wheel set positioning devices further includes: a pair of axial positioning pushing devices, each axial positioning pushing device is connected to the bearing base, and is movably respectively butt against the end face of the shaft head of the force-measuring wheel set; at least one pair of longitudinal threaded thrusting devices, each pair of longitudinal threaded thrusting devices are respectively threaded on the two columns of the gantry loading frame, and can move horizontally Respectively abut against the axle ends of the force measuring wheelset.

In a preferred embodiment, each of the axial positioning pushing devices includes an axial positioning post and an axial push rod, the lower end of the axial positioning post is connected to the bearing base, and the axial push rod is movably threaded. Connected to the middle section of the axial positioning column, the inner end of the axial push rod corresponds to the end face of the shaft head of the force measuring wheel set; each of the longitudinal threaded push devices includes a pair of longitudinal push rods, which can move horizontally respectively The ground is screwed to the two columns of the same gantry loading frame, and the inner end of each longitudinal push rod corresponds to the journal position of the axle end of the force measuring wheel set.

In a preferred embodiment, there is a moving block inside the axial positioning column that can move up and down, and the axial push rod is screwed to the moving block so that it can move horizontally; the inner end of each axial push rod A horizontal plug is provided, and one side of the end face of the horizontal plug corresponds to the end face of the axle head of the force-measuring wheel set, and a longitudinal plug is provided at the inner end of each of the longitudinal push rods.

In a preferred embodiment, each of the gantry loading frames also includes a loading beam, which is connected to the upper end between the two columns; the above-mentioned loading device includes a lifting jack, a loading jack and a hydraulic system, and the lifting jack and the The loading jacks can be lifted and set separately through the hydraulic system; the lifting jack is arranged on the bearing base and is located in the middle of the two columns, and the loading jack is arranged on the loading beam and corresponds to the position of the lifting jack; the measuring The journal positions of the two shaft ends of the power wheel pair are respectively located between the lifting jack and the loading jack.

In a preferred embodiment, the outer side of the journal of each shaft end of the force-measuring wheel set is connected to a bearing or an axle box, and the loading jack, the lifting jack and the two longitudinal jacks are respectively corresponding to Each of said bearings or axle housings.

In a preferred embodiment, each of the vertical force calibration bearing devices includes a vertical force bearing slide, and the vertical force bearing slide is horizontally movable and arranged on the bearing base, and the vertical force The loading slide is provided with the load cell, and the upper end of the load cell is connected with a replaceable sensor load head.

In a preferred embodiment, each of the vertical force calibration bearing devices also includes a vertical force bearing slide base, the vertical force bearing slide base is connected to the bearing base, and the vertical force bearing slide The shift adjustment part is movably connected to the vertical force bearing slide base, and the position of the vertical force bearing slide base corresponding to the force measuring wheel pair is provided with a lateral movement scale; the lower part of the vertical force bearing slide A pointer is provided corresponding to the position of the load cell, and the pointer points to the lateral displacement scale correspondingly.

In a preferred embodiment, at least one of the inner side and the outer side of each of the vertical force bearing slides is provided with a rotatable angle positioning pointer, which is in contact with the inner end surface of the force measuring wheel pair; The inner side of the rim of the force-measuring wheel set is provided with a plurality of marking angle marking lines along the radial direction.

Features and advantages of the utility model are:

1. The force-measuring wheel set is directly located on the force-measuring sensor, that is, the vertical force of the wheel acts directly on the force-measuring sensor, eliminating the force transmission error caused by the old calibration equipment using the lever principle to load, and maximizing the force-measuring wheel accuracy of calibration results.

2. Adopting a rotatable gantry structure, whether it is a vehicle force measuring wheel set or a locomotive force measuring wheel set, whether it is a force measuring wheel set with a motor or without a motor force measuring wheel set, it can be conveniently performed on this calibration platform. Calibration work, with a wide range of adaptability.

3. It can be applied to all different types of force-measuring wheelsets with a set of force-measuring wheel-set positioning device, thus completely changing the bearing size due to different wheel-set models; However, it is necessary to design and process a special positioning tool for the state of the journal of each force-measuring wheel set.

4. The position of the wheel-rail contact point can be adjusted arbitrarily and maintained through the lateral movement of the adjusting part, so as to obtain complete and accurate calibration data of the change of the measurement result due to the change of the contact point between the wheel and the rail.

5. It uses a portable electro-hydraulic loading system as the power source. The hydraulic system can independently control the vertical loading and unloading of the force measuring wheel pair and the vertical lifting and landing of the force measuring wheel pair at the same time without affecting each other.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is the schematic diagram of the front view of the static calibration test bench of the force-measuring wheels of the present utility model (displaying the force-measuring wheels);

Fig. 1A is a schematic side view of the static calibration test bench of the force-measuring wheel of the present invention (displaying the force-measuring wheel);

Fig. 2 is the schematic diagram of the front view of the static calibration test bench of the force measuring wheel of the present utility model (the force measuring wheel is not shown);

Fig. 2A is a schematic side view of the static calibration test bench of the force-measuring wheelset of the present invention (the force-measuring wheelset is not shown);

Fig. 2B is a schematic top view of the static calibration test bench of the force-measuring wheelset of the present invention (the force-measuring wheelset is not shown);

Fig. 3 is a front view sectional schematic view of the axial positioning push device of the present utility model;

Fig. 3A is a schematic top view of the axial positioning and pushing device of the present invention;

Fig. 4 is a schematic front view of the gantry loading frame of the present invention in a rotating state;

Fig. 5 is a schematic front view of the vertical force calibration bearing device of the present invention (the contact point between the bearing head and the force measuring wheel pair is at the rolling circle position);

Fig. 5A is a schematic side view of the vertical force calibration bearing device of the present invention (the contact point between the bearing head and the force measuring wheel pair is at the rolling circle position);

Fig. 5B is a schematic top view of the vertical force calibration bearing device of the present invention (the contact point between the bearing head and the force measuring wheel set is at the rolling circle position);

Fig. 6 is a schematic front view of the vertical force calibration bearing device of the present invention (the position where the contact point between the bearing head and the force measuring wheel pair moves outward);

Fig. 7 is a schematic front view of the vertical force calibration bearing device of the present invention (the contact point between the bearing head and the force-measuring wheel set moves inward to the position of the wheel rim);

Fig. 8 is a schematic side view of the combined state of the vertical force calibration bearing device of the present invention (showing the rim bearing head);

Fig. 8A is a schematic side view of the half-separated state of the vertical force calibration bearing device of the present invention (showing the rim bearing head);

Fig. 9 is a schematic front view of the tread carrying head of the present invention;

Fig. 9A is a schematic side view of the tread bearing head of the present invention;

Fig. 10 is a schematic front view of the rim bearing head of the present invention;

Fig. 10A is a schematic side view of the rim carrying head of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Figures 1 to 10A, the static calibration test bench for force measuring wheels proposed by the utility model includes a bearing base 1, a pair of force measuring wheels positioning devices 2 ("a pair" refers to two corresponding to each other) , a pair of vertical force calibration carrying device 3 and loading device 4 . A pair of force-measuring wheel pair positioning devices 2 are arranged on the left and right sides above the bearing base 1, and each force-measuring wheel pair positioning device 2 is respectively adjustably connected to the shaft end of the force-measuring wheel pair 5, so as to adapt to Loading and taking-out of various different types of force-measuring wheelsets 5. A pair of vertical force calibration bearing devices 3 are arranged on the top of the bearing base 1, and are respectively located on the inside of the force measuring wheel pair positioning device 2, and each vertical force calibration bearing device 3 is movably connected to the force measuring wheel pair 5 respectively. The bottom of each vertical force calibration bearing device 3 has a load cell 31 . The loading device 4 corresponds to the force-measuring wheel pair 5, and performs loading and unloading settings on the force-measuring wheel pair 5, mainly vertical loading and unloading settings here.

When the wheel set needs to be calibrated, first adjust the force measuring wheel set positioning device 2 so that it is respectively connected to the two shaft ends of the force measuring wheel set 5; then carry out a loading test on the force measuring wheel set 5 through the loading device 4 At the same time, the vertical force calibration bearing device 3 at the bottom of the force-measuring wheel pair 5 measures the vertical force of the force-measuring wheel pair 5 through its load cell 31 . In addition, the lateral force of the force-measuring wheel set 5 can be measured by a method well known to those skilled in the art, which will not be repeated here.

In the embodiment of the utility model, since the force-measuring wheel set positioning device 2 can be adjusted, it can be adapted to various types of force-measuring wheelsets, thereby improving its applicability, saving costs, and being easy to use.

According to an embodiment of the present utility model, as shown in FIG. 2B and FIG. 4 , each force-measuring wheel set positioning device 2 includes a gantry loading frame 21, and the gantry loading frame 21 includes two linked columns 211, and each column 211 There is an upper column 2111 and a lower column 2112 connected up and down. There is a fixed pin 2113 between the upper and lower columns 2111 and 2112 and a removable movable pin 2114 located below the fixed pin 2113. Of course, the movable pin 2114 can also be located Above, left or right of the fixed pin 2113; when the movable pin 2114 is pulled out, the upper column 2111 can rotate outward around the fixed pin 2113. Of course, those skilled in the art should understand that for the two columns 211 of the same gantry loading frame 21, the axes of the fixed pins 2113 between the upper and lower columns 2111, 2112 are on the same line, so when the movable pin is pulled out After 2114, the upper column 2111 can rotate around the fixed pin 2113, and the axis of the movable pin 2114 can be collinear or not; in addition, the movable pin 2114 can only be arranged on one of the two columns 211, and the other Column then can not be provided with movable pin 2114, so still can make, when extracting movable pin, make upper column rotate relative to lower column, insert movable pin, then can make upper column be fixed on the lower column, can not rotate.

When it is necessary to load or take out the force-measuring wheel pair 5, pull out the movable pin 2114. At this time, the upper and lower columns 2111, 2112 are only connected by the fixed pin 2113, and the upper column 2111 is pushed outward, so that the upper column 2111 can Rotate around the fixed pin 2113, because the two columns 211 of the same gantry loading frame 21 are in a linked state, when pulling out the movable pin 2114 on the two columns 211, pushing one of the upper columns 2111 can make the two upper columns 2111 rotate outwards around the fixed pin 2113 together.

Further, a rotation limit stopper 2115 is provided on the inner side of at least one of the lower columns 2112 of each gantry loading frame 21 to limit the rotation angle of the upper column 2111 to facilitate use; here, each lower column 2112 are provided with a rotation limit stopper 2115.

According to an embodiment of the present utility model, each said force measuring wheel set positioning device 2 further includes a pair of axial (transverse) positioning pushing devices 22 and at least a pair of longitudinal screw pushing devices 23 . Each axial positioning pushing device 22 is connected to the bearing base 1, and is movably abutted against the shaft head end face 51 of the force measuring wheel pair 5, so as to position the force measuring wheel pair 5 in the axial direction (transverse direction). ; Each pair of longitudinal thread thrusting devices 23 is threadedly connected to the two columns 211 of the gantry loading frame 21 respectively, and can be moved horizontally against the axle ends of the force measuring wheel pair 5 respectively, so that the force measuring wheel pair 5 vertical orientation.

Specifically, each axial positioning pushing device 22 includes an axial positioning post 221 and an axial push rod 222. The lower end of the axial positioning post 221 is connected to the bearing base 1, and the axial push rod 222 can move (including horizontal movement) and vertical movement) are threadedly connected to the middle section of the axial positioning column 221, and the inner end of the axial push rod 222 corresponds to the shaft head end face of the force measuring wheel pair 5; more specifically, as shown in Fig. 3 and Fig. 3A, There is a moving block 2221 inside the axial positioning column 221 that can move up and down. Here, the moving block 2221 moves up and down through the screw rod 2222. The upper part of the screw rod 2222 is provided with a limit block 2223, so that the moving block 2221 can only move within a certain range. Move up and down inside; the axial push rod 222 can be horizontally moved and screwed on the moving block 2221, that is to say, with the help of the moving block 2221, the axial push rod 222 can move vertically or horizontally up and down to adapt to various specifications Models of dynamometer wheel sets of 5 different heights and axial distances. Wherein, the inner end of the axial push rod 222 may be provided with a transverse plug 2224 , and one side of the end face of the transverse plug 2224 corresponds to the end face 51 of the shaft head of the force-measuring wheel set 5 .

There can be multiple pairs of longitudinal threaded thrusting devices 23, for example three pairs, which are respectively located at different heights of the column 211, so as to adapt to the different heights of the journal positions of the 5 axle ends of the force-measuring wheel pairs of different specifications. Each longitudinal thread pushing device 23 includes a pair of longitudinal push rods 231, which are respectively movably threaded on two columns 211 of the same gantry loading frame 21 (i.e. the front and rear columns shown in FIG. 1 ), each The inner end of each longitudinal push rod 231 corresponds to the journal position of the force-measuring wheel set 5; wherein, the inner end of each longitudinal push rod 231 is provided with a longitudinal plug.

Before loading the force-measuring wheel pair 5 into the gantry loading frame 21, the axial jack rod 222 and the longitudinal jack rod 231 are respectively horizontally screwed out to the outside. Finally, make the pair of force-measuring wheels 5 correspond to one of the pair of longitudinal threaded thrusting devices 23, move the two longitudinal push rods 231 corresponding to each axial end of the force-measuring wheel pair 5 to the inside respectively, and finally make the longitudinal push rods 231 The vertical head on the top is against the journal position of the force measuring wheel pair 5, so that the force measuring wheel pair 5 cannot move in the longitudinal direction; then, the axial push rod 222 can be moved up and down to the corresponding force measuring wheel by means of the moving block 2221 At the shaft head end face 51 of the pair 5, move the two axial push rods 222 horizontally to the inner side respectively, and finally make the axial (transverse) plug push against the shaft head end face 51 of the force measuring wheel pair 5, so that the force measuring Wheel set 5 cannot move axially.

According to one embodiment of the present utility model, each gantry loading frame 21 also includes a loading beam 212, which is connected to the upper end between the two columns 212; the above-mentioned loading device 4 includes a lifting jack 41 and a loading jack 42, and the lifting jack 41 and the loading jack 42 can be set up and down, for example, can be set up and down through the hydraulic system, wherein the hydraulic system can control the lifting jack 41 and the loading jack 42 separately at the same time, so as to vertically lift and land the force measuring wheel and measure The power wheels independently control the vertical loading and unloading, without affecting each other, and can also cooperate with each other to coordinate actions; the lifting jack 41 is placed on the bearing base 1 and is located in the middle of the two columns 211, and the loading jack 41 42 is arranged on the loading beam 212 and corresponds to the position of the lifting jack 41 . The journal positions at the left and right ends of the force measuring wheel pair 5 are respectively located between the lifting jack 41 and the loading jack 42 .

Specifically, the outer sides of the journal positions at both ends of the force-measuring wheel pair 5 are connected to bearings or axle boxes 52, and the loading jack 42, lifting jack 41 and two longitudinal jacks correspond to each bearing or axle box respectively. Box 52. Among them, the center distances of the two axle boxes 52 of the force-measuring wheelsets 5 of various specifications are similar, and the center distances of the two gantry loading frames 21 are taken from various force-measuring wheel-set bearings or centers of the axle boxes 52 Therefore, the loading jack 42 can reliably contact the axle housing 52.

According to an embodiment of the present utility model, as shown in FIG. 5 to FIG. 10A , each vertical force calibration bearing device 3 includes a vertical force bearing slide 32, and the vertical force bearing slide 32 is horizontally movable and arranged on the On the bearing base 1, a load cell 31 is arranged on the vertical force bearing slide 32; the upper end of the load cell 31 is connected with a replaceable sensor bearing head, where the sensor bearing head has a tread bearing head 33 and a rim bearing There are two kinds of heads 33', which are respectively used to carry the tread 53 and the rim 54 of the load-measuring wheel pair 5. Figure 9 shows the tread bearing head 33, and Figure 10 shows the rim bearing head 33'. The two bearing heads The replacement is mainly to adapt to the different shape characteristics of the tread 53 and the rim 54 of the load-measuring wheel set 5; wherein, the sensor bearing head is connected to the load cell 31 through a positioning pin 331, as shown in FIG. 8A .

Each vertical force calibration bearing device 3 also includes a vertical force bearing slide base 34, the vertical force bearing slide base 34 is connected on the bearing base 1, and the vertical force bearing slide base 32 is movable through a traverse adjustment member 35 Ground is connected on the vertical force bearing slide base 34, and the position of the vertical force bearing slide base 34 corresponding to the force measuring wheel pair 5 is provided with a lateral displacement scale 36, and the bottom of the vertical force bearing slide base 32 corresponds to the load cell The position of 31 is provided with a pointer 37, and the pointer 37 points to the lateral displacement scale 36 correspondingly. Wherein, the traversing adjustment part 35 is fixed in the axial direction, but can rotate. The traversing adjustment part 35 includes a handle 351 and a screw rod 352 that are connected to each other. The screw rod 352 is rotatably connected inside the vertical force bearing slide 32. When the handle 351 is used, the vertical force carrying slide table 32 can be moved horizontally.

In addition, a sliding seat 411 that slides axially can be set on the vertical force bearing slide base 34, and the lifting jack 41 is placed on the sliding seat 411, so that the lifting jack 41 can slide axially, so that it can better contact the axle box Body 52. Of course, the sliding seat 411 may not be provided, because the distances between the two axle boxes 52 are similar, and the axial widths of various axle boxes are sufficiently wide. Therefore, as long as the distance between the two lifting jacks 41 is close to the distance between the two axle boxes 52, it can be ensured that the lifting jacks 41 are supported on the axle boxes 52.

In addition, at least one of the inner and outer sides of each vertical force bearing slide 32 is provided with a rotatable angle positioning pointer 38, which is in contact with the inner end surface of the force measuring wheel pair 5, and the force measuring wheel pair 5 The inner side of the rim of the rim is provided with a plurality of radial angle marking lines, which can be evenly distributed. By rotating the force measuring wheel pair 5, the angle positioning pointer 38 can point to one of the marking lines. In this embodiment, the angle positioning pointer When 38 points to the position of the marking line, the loading device 4 loads the force measuring wheel pair 5, and the vertical force of the force measuring wheel pair 5 is measured by the load cell 31. When the force-measuring wheel pair 5 needs to be rotated, the force-measuring wheel pair 5 can be lifted by the lift jack 41, and the force-measuring wheel pair 5 can be rotated manually or by a tool so that its marking line is aligned with the angle positioning pointer 38 to determine the angle. The force measuring wheel calibrates the output characteristics.

The above are only a few embodiments of the present utility model, and those skilled in the art can make various changes or modifications to the embodiments of the present utility model according to the disclosure of the application documents without departing from the spirit and scope of the present utility model.

Claims (10)

1. A static calibration test rig for force measuring wheels, characterized in that the test rig comprises: carrying base; A pair of force-measuring wheel pair positioning devices, which are arranged on the left and right sides above the bearing base, and each force-measuring wheel pair positioning device is respectively adjustably connected to the shaft end of the force-measuring wheel pair; A pair of vertical force calibration bearing devices, which are arranged above the bearing base, and are respectively located inside the force measuring wheel pair positioning device, each vertical force calibration bearing device is respectively movably connected to the force measuring wheel pair bottom, and both have load cells; A loading device capable of loading and unloading the force measuring wheel set. 2. The static calibration test bench for force-measuring wheelsets according to claim 1, wherein each said force-measuring wheelset positioning device comprises a gantry loading frame, and said gantry loading frame comprises two interlocking columns, Each column has an upper column and a lower column connected up and down, between the upper and lower columns there is a fixed pin and an extractable movable pin positioned below the fixed pin, and in the pulled-out state of the movable pin, the upper column It can rotate outward around the fixed pin; on the inner side of at least one of the lower columns of each gantry loading frame, a rotation limit stopper that limits the rotation angle of the upper column is provided. 3. The force-measuring wheel pair static calibration test stand according to claim 2, wherein each said force-measuring wheel pair positioning device also includes: A pair of axially positioned pushing devices, each axially positioned pushing device is connected to the bearing base, and is movably pushed against the end faces of the shaft heads of the force-measuring wheelsets; At least one pair of longitudinal threaded thrusting devices, each pair of longitudinal threaded thrusting devices are respectively threaded on the two columns of the gantry loading frame, and can be moved horizontally against the shaft ends of the force measuring wheel set respectively . 4. The force-measuring wheel set static calibration test stand according to claim 3, characterized in that, each said axial positioning thrusting device comprises an axial positioning post and an axial push rod, and the lower end of the axial positioning post is connected to On the bearing base, the axial push rod is movably screwed to the middle section of the axial positioning column, and the inner end of the axial push rod corresponds to the shaft head end face of the force measuring wheel set; Each of the longitudinal threaded thrusting devices includes a pair of longitudinal ejector rods, which are respectively horizontally movable and threaded on the two columns of the same gantry loading frame, and the inner end of each longitudinal ejector rod corresponds to On the journal position of the shaft end of the force measuring wheel set. 5. The force-measuring wheel set static calibration test bench according to claim 4, characterized in that, there is a movable block inside the axial positioning column that can move up and down, and the axial push rod can be horizontally moved and threaded on the On the moving block; the inner end of each said axial push rod is provided with a horizontal plug, and one side of the end face of the horizontal plug corresponds to the end face of the shaft head of the load-measuring wheel set, and the inner end of each said longitudinal push rod is provided with a longitudinal plug . 6. The static calibration test bench for force measuring wheels according to any one of claims 2-5, wherein each of the gantry loading frames also includes a loading beam connected between the two columns The upper end; the above-mentioned loading device includes a lifting jack, a loading jack and a hydraulic system, and the lifting jack and the loading jack can be lifted and set separately through the hydraulic system; the lifting jack is arranged on the bearing base and is located in the middle of the two columns, The loading jack is arranged on the loading beam and corresponds to the position of the lifting jack; the journal positions of the two shaft ends of the force-measuring wheel set are respectively located between the lifting jack and the loading jack. 7. The static calibration test bench for force measuring wheels according to claim 6, characterized in that, the outside of the journal position of each axle end of the force measuring wheels is connected with a bearing or an axle box, and the The loading jack, the lifting jack and the two longitudinal jacks correspond to each of the bearings or axle boxes respectively. 8. The static calibration test bench for force measuring wheels according to any one of claims 1-5, wherein each of said vertical force calibration bearing devices comprises a vertical force bearing slide, and said vertical force The load-bearing slide is horizontally movably arranged on the load-bearing base, the load cell is arranged on the vertical force load-bearing slide, and a replaceable sensor load head is connected to the upper end of the load cell. 9. The force-measuring wheel set static calibration test stand according to claim 8, characterized in that, each of the vertical force calibration bearing devices also includes a vertical force bearing slide base, and the vertical force bearing slide base is connected to the On the bearing base, the vertical force bearing slide is movably connected to the vertical force bearing slide base through the lateral movement adjustment member, and the vertical force bearing slide base is provided with a position corresponding to the force measuring wheel pair. A lateral movement scale; a pointer is provided below the vertical force bearing slide corresponding to the position of the load cell, and the pointer points to the lateral movement scale correspondingly. 10. The force-measuring wheel set static calibration test stand according to claim 9, wherein at least one of the inside and outside of each of the vertical force bearing slides is provided with a rotatable angle positioning pointer, It is in contact with the inner end surface of the force-measuring wheel set; the inner side of the wheel rim of the force-measuring wheel set is provided with a plurality of marking angle marking lines along the radial direction.

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