CN213812039U

CN213812039U - A measure tool for leaf spring

Info

Publication number: CN213812039U
Application number: CN202022944584.1U
Authority: CN
Inventors: 张鑫; 徐通; 贾国强; 刘继东
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-07-27
Anticipated expiration: 2030-12-07

Abstract

The utility model relates to a measurement tool technical field discloses a measurement tool for leaf spring, including symmetry measuring device, symmetry measuring device includes locating component, first measuring component and second measuring component, and leaf spring's length direction's both ends are located to two locating component components, and locating component includes: the positioning rod is inserted in the rolling lug; the first positioning seat and the second positioning seat are respectively arranged at two ends of the rolling lug, and one side surfaces of the first positioning seat and the second positioning seat which are opposite to each other are respectively a first positioning surface and a second positioning surface; the first pressing piece is used for pressing the rolling lug on the second positioning surface; the second pressing piece is used for pressing the rolling lug on the first positioning surface; the first measuring assembly is used for measuring the distance from the center bolt to the center connecting line of the first end faces of the two rolling lugs, and the second measuring assembly is used for measuring the distance from the center bolt to the center connecting line of the second end faces of the two rolling lugs. The utility model discloses can measure leaf spring's symmetry, and measurement accuracy and measurement of efficiency are high.

Description

A measure tool for leaf spring

Technical Field

The utility model relates to a measure tool technical field, especially relate to a measure tool for leaf spring.

Background

The steel plate spring is widely applied to automobile suspensions, and is an elastic beam with approximately equal strength, which is formed by combining a plurality of alloy spring pieces with equal width but unequal lengths (the thicknesses can be equal or unequal). The parameters of the steel plate spring such as chord length, half chord length, arc height, symmetry degree and the like are important in the design of the automobile suspension.

The chord length of the leaf spring refers to the distance between the axes of the two rolling lugs of the leaf spring, and the semi-arc length refers to the distance between the central bolt in the middle of the leaf spring and the axis of each rolling lug in the length direction of the leaf spring. The arc height of the steel plate spring is the height difference between the upper surface of the main sheet of the steel plate spring and the central connecting line of the lugs at the two ends. The symmetry of the leaf spring means the symmetry of the axis of the center bolt in the width direction of the leaf spring.

The existing measuring jig for the leaf spring generally cannot measure the symmetry.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a measurement tool for leaf spring can measure leaf spring's symmetry.

In order to realize the purpose, the following technical scheme is provided:

the utility model provides a measurement tool for leaf spring, leaf spring includes central bolt and two book ears, the book ear includes relative first terminal surface and second terminal surface, a measurement tool for leaf spring includes symmetry measuring device, symmetry measuring device includes locating component, first measuring component and second measuring component, two locating component is configured to the branch and locates leaf spring's length direction's both ends, locating component includes:

a positioning rod configured to be inserted into the eye;

the first positioning seat and the second positioning seat are configured to be arranged at two ends of the rolling lug respectively, and one side surfaces, opposite to each other, of the first positioning seat and the second positioning seat are a first positioning surface and a second positioning surface respectively;

the first pressing piece is configured to be used for pressing the rolling lug on the second positioning surface;

the second pressing piece is configured to be used for pressing the lug to the first positioning surface;

the first measuring component is configured to be used for measuring the distance from the center bolt to a connecting line of the centers of the first end surfaces of the two rolling ears, and the second measuring component is configured to be used for measuring the distance from the center bolt to a connecting line of the centers of the second end surfaces of the two rolling ears.

As the utility model discloses a measuring tool for leaf spring, the first measuring subassembly includes first base and first measuring part, the second measuring subassembly includes second base and second measuring part, the first base and the second base all are located between two the locating component, the first base includes the first reference surface, the second base includes the second reference surface;

in the width direction of the leaf spring, the first reference surface and the first positioning surface are arranged at a first preset distance interval, the second reference surface and the second positioning surface are arranged at a second preset distance interval, the first measuring piece is used for measuring the distance between the first reference surface and the center bolt in the width direction of the leaf spring, and the second measuring piece is used for measuring the distance between the second reference surface and the center bolt in the width direction of the leaf spring.

As the utility model discloses a measurement tool for leaf spring, first compress tightly a position set up adjustably in on the first positioning seat, the second compress tightly a position set up adjustably in on the second positioning seat.

As the measuring jig for the leaf spring of the present invention, the first pressing member includes a first screw, and the first screw is connected to the first positioning seat by a thread; and/or the second pressing piece comprises a second screw rod, and the second screw rod is in threaded connection with the second positioning seat.

As the utility model discloses a measurement tool for leaf spring, the locating lever stretches out the both ends of book ear set up respectively in first locating seat with on the second locating seat.

As the utility model discloses a measurement tool for leaf spring, two locating component is first locating component and second locating component respectively, among the first locating component, first locating seat with all be provided with the draw-in groove on the second locating seat, correspond the both ends of locating lever block respectively locate first locating seat with in the draw-in groove of second locating seat.

As the utility model discloses a measuring tool for leaf spring still includes half chord length measuring device, half chord length measuring device includes third base and third measuring part, the third base is located between two locating component, the third base includes the third reference surface;

and the distance between the third reference surface and one of the positioning assemblies is a third preset distance along the length direction of the leaf spring, and the third measuring part is used for measuring the distance between the third reference surface and the central bolt in the length direction of the leaf spring.

As the utility model discloses a measurement tool for leaf spring still includes arc height measuring device, arc height measuring device includes sighting rod and first sleeve, the sighting rod is mobile, first sleeve sliding connection in on the sighting rod, first sleeve is configured to be used for the cover to locate outside the central bolt, just first telescopic terminal surface with the upper surface laminating of leaf spring's main leaf, first sleeve is in height measurable on the sighting rod.

As the utility model discloses a measurement tool for leaf spring, arc height measuring device still includes first guide rail and second guide rail, first guide rail extends along the first direction, the second guide rail extends along the second direction, second guide rail slidable set up in on the first guide rail, sighting rod slidable set up in on the second guide rail.

As the utility model discloses a measurement tool for leaf spring still includes the second sleeve, the second sleeve is configured to the cover and locates on the central bolt.

The utility model has the advantages that:

the utility model provides an among the measurement tool for leaf spring, including carrying out the symmetry measuring device of symmetry measurement. The symmetry measuring device comprises a positioning assembly, a first measuring assembly and a second measuring assembly. The locating component is provided with two to divide the both ends of locating leaf spring's length direction, the locating lever is inserted and is established and connect in the eye, with fixed leaf spring, the width direction's of eye both ends are located to first positioning seat and second positioning seat branch for the fixed eye of centre gripping. The side surfaces of the first positioning seat and the second positioning seat, which are opposite to each other, are respectively a first positioning surface and a second positioning surface. When the two first pressing pieces respectively attach the second end faces of the two lugs to the second positioning faces of the corresponding second positioning seats, the first measuring assembly measures the distance from the central bolt to the central connecting line of the second end faces of the two lugs, and the first measuring distance is set. When the two second pressing pieces respectively attach the first end surfaces of the two lugs to the corresponding first positioning surfaces, the second measuring assembly measures the distance from the central bolt to the central connecting line of the first end surfaces of the two lugs, and sets the distance as a second measuring distance, so that the symmetry of the leaf spring is obtained.

Specifically, in the width direction of leaf spring, first reference surface on the first base is parallel with the first locating surface of first locating seat, and sets up with first preset distance interval. Similarly, in the width direction of the leaf spring, the second reference surface on the second base is parallel to the second positioning surface of the second positioning seat, and is spaced by a second preset distance. That is, before the symmetry measurement, the first base, the second base, the first positioning seat and the second positioning seat are arranged according to the preset relative position and relative distance. For example, the first base and the second base are symmetrically distributed on two sides of a connecting line of the two positioning components. The first reference surface is a side surface of the first base far away from the second base, and the second reference surface is a side surface of the second base far away from the first base, so that the first preset distance is equal to the second preset distance.

The first measuring piece is used for measuring the distance (in the width direction of the leaf spring) between the first reference surface and the center bolt, and is set as a first measurement distance, which is denoted by L1. The second measuring piece is used for measuring the distance (in the width direction of the leaf spring) between the second reference surface and the center bolt, and is set as a second measurement distance, which is denoted by L2. The distance from the center bolt to the center connection of the first end faces of the two lugs is indirectly represented by a first measured distance, and the distance from the center bolt to the center connection of the second end faces of the two lugs is represented by a second measured distance interval. Since the first predetermined distance is equal to the second predetermined distance, the symmetry of the leaf spring can be obtained by making a difference between the first measured distance L1 and the second measured distance L2. For example, when the absolute value of the difference between the first measurement distance L1 and the second measurement distance L2 is not greater than 0.4mm, the degree of symmetry of the leaf spring is passed, and otherwise, the leaf spring is failed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a measuring jig for a leaf spring provided by an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of two positioning assemblies according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a first positioning seat of a first positioning assembly according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a first measuring assembly, a second measuring assembly and a half-chord length measuring device according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of symmetry measurement performed according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of performing half chord length measurement according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an arc height measuring device according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a base according to an embodiment of the present invention.

Reference numerals:

100. a leaf spring; 110. ear rolling; 111. a first end face; 112. a second end face; 120. a center bolt; 1a, a symmetry measuring device; 2a, a half chord length measuring device; 3a, an arc height measuring device;

1. a positioning assembly; 2. a first measurement assembly; 3. a second measurement assembly; 4. a third base; 5. a third measuring member; 6. a marker post; 7. a first sleeve; 8. a first guide rail; 9. a second guide rail; 10. a mounting seat; 20. a base;

11. positioning a rod; 12. a first positioning seat; 13. a second positioning seat; 14. a first pressing member; 15. a second pressing member;

121. a first positioning surface; 131. a second positioning surface; 123. a card slot;

21. a first base; 22. a first measuring member;

211. a first reference plane;

31. a second base; 32. a second measuring member;

311. a second reference plane;

41. a third reference plane;

71. a cartridge body; 72. a connecting portion; 73. a sliding part;

201. a substrate; 202. a support leg; 203. and (5) footing.

Detailed Description

In order to make the technical problems, technical solutions adopted and technical effects achieved by the present invention clearer, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-4, the present embodiment provides a measuring tool for a leaf spring, which can measure the symmetry, half chord length and arc height of the leaf spring 100, and has high measuring accuracy and measuring efficiency, and the whole measuring tool has a simple structure and is convenient for measuring operation.

The leaf spring 100 includes a center bolt 120 and two ears 110. The center bolt 120 is located at the middle of the leaf spring 100 and penetrates through the thickness direction of the leaf spring 100. The two lugs 110 are provided at both ends of the leaf spring 100 in the longitudinal direction. The tab 110 includes a first end surface 111 and a second end surface 112 opposite to each other in the width direction of the leaf spring 100.

The measuring jig for the leaf spring includes a symmetry measuring device 1a for measuring symmetry. The symmetry measuring apparatus 1a includes a positioning unit 1, a first measuring unit 2, and a second measuring unit 3. The positioning assembly 1 is provided with two parts, and is respectively arranged at two ends of the leaf spring 100 in the length direction, and is used for fixing the rolling ears 110 at the two ends of the leaf spring 100. The first measuring assembly 2 is used for measuring the distance between the center bolt 120 and the connecting line of the centers of the first end surfaces 111 of the two lugs 110, and the second measuring assembly 3 is used for measuring the distance between the center bolt 120 and the connecting line of the centers of the second end surfaces 112 of the two lugs 110, so as to obtain the symmetry degree of the leaf spring 100.

Specifically, the positioning assembly 1 includes a first positioning seat 12, a second positioning seat 13, and a positioning rod 11. The first positioning seat 12 and the second positioning seat 13 are respectively disposed at two ends of the width direction of the rolling lug 110, and are used for clamping and fixing the rolling lug 110. The first positioning seat 12 is disposed near the first end surface 111 of the ear 110. The second positioning seat 13 is disposed near the second end surface 112 of the rolling lug 110.

The positioning rod 11 is inserted into the rolling lug 110 to fix the leaf spring 100. In this embodiment, two ends of the positioning rod 11 extending out of the rolling lug 110 are respectively placed on the first positioning seat 12 and the second positioning seat 13. Obviously, in other embodiments, both ends of the positioning rod 11 are not limited to be placed on the first positioning seat 12 and the second positioning seat 13, and both ends of the positioning rod 11 may be provided on other members.

One side surface of the first positioning seat 12 and one side surface of the second positioning seat 13 opposite to each other are the first positioning surface 121 and the second positioning surface 131, that is, one side surface of the first positioning seat 12 close to the first end surface 111 of the rolling lug 110 is the first positioning surface 121, and one end of the second positioning seat 13 close to the second end surface 112 of the rolling lug 110 is the second positioning surface 131. The first pressing member 14 is movably disposed on the first positioning seat 12. The second pressing member 15 is movably disposed on the second positioning seat 13. The position of the first pressing member 14 on the first positioning seat 12 is adjusted, so that the end of the first pressing member 14 abuts against the first end surface 111 of the tab 110, the tab 110 is pressed on the second positioning seat 13, and the second end surface 112 of the tab 110 is attached to the second positioning surface 131 of the second positioning seat 13. Similarly, the position of the second pressing member 15 on the second positioning seat 13 is adjusted, so that the end of the second pressing member 15 abuts against the second end surface 112 of the tab 110, the tab 110 is pressed against the first positioning seat 12, and the first end surface 111 of the tab 110 is attached to the first positioning surface 121 of the first positioning seat 12.

Obviously, the first pressing member 14 is not limited to be disposed on the first positioning seat 12, the second pressing member 15 is not limited to be disposed on the second positioning seat 13, and the first pressing member 14 and the second pressing member 15 may be disposed on other components as long as the first pressing member 14 and the second pressing member 15 can press the tab 110.

When the second end surfaces 112 of the two lugs 110 are respectively attached to the second positioning surfaces 131 of the corresponding second positioning seats 13, the first measuring assembly 2 measures the distance from the central bolt 120 to the central connecting line of the second end surfaces 112 of the two lugs 110. When the first end surfaces 111 of the two lugs 110 are respectively attached to the corresponding first positioning surfaces 121 of the first positioning seat 12, the second measuring assembly 3 measures the distance from the central bolt 120 to the central connecting line of the first end surfaces 111 of the two lugs 110. Finally, the symmetry of the leaf spring 100 can be obtained, as described in detail below.

Optionally, the first measuring assembly 2 comprises a first base 21 and a first measuring member 22 arranged on the first base 21. The second measuring assembly 3 includes a second base 31 and a second measuring member 32 provided on the second base 31. The first base 21 and the second base 31 are both located between the two positioning assemblies 1. The first base 21 includes a first reference surface 211. The second base 31 includes a second reference surface 311.

In the present embodiment, referring to fig. 5, in the width direction of the leaf spring 100, the first reference surface 211 is parallel to the first positioning surface 121 of the first positioning seat 12 and is spaced apart by a first preset distance. Similarly, in the width direction of the leaf spring 100, the second reference surface 311 is parallel to the second positioning surface 131 of the second positioning seat 13 and is spaced apart by a second preset distance. That is, before the symmetry measurement, the first base 21, the second base 31, the first positioning base 12, and the second positioning base 13 are set at predetermined relative positions and relative distances. Illustratively, the first base 21 and the second base 31 are symmetrically distributed on both sides of a connecting line of the two positioning components 1. The first reference surface 211 is a side surface of the first base 21 away from the second base 31, and the second reference surface 311 is a side surface of the second base 31 away from the first base 21. Obviously, in the present embodiment, the first preset distance is equal to the second preset distance. In other embodiments, the first preset distance and the second preset distance may not be equal to each other.

Specifically, the first measuring piece 22 is used to measure the distance (in the width direction of the leaf spring 100) between the first reference surface 211 and the center bolt 120, and is set as a first measurement distance, which is denoted by L1. The second measuring piece 32 is used to measure the distance (in the width direction of the leaf spring 100) between the second reference surface 311 and the center bolt 120, and is set as a second measurement distance, which is denoted by L2.

The distance from the center bolt 120 to the center connection of the first end surfaces 111 of the two lugs 110 is indirectly represented by a first measured distance, and the distance from the center bolt 120 to the center connection of the second end surfaces 112 of the two lugs 110 is represented by a second measured distance. Since the first predetermined distance is equal to the second predetermined distance, the symmetry of the leaf spring 100 can be obtained by making a difference between the first measured distance L1 and the second measured distance L2. Illustratively, when the absolute value of the difference between the first measured distance L1 and the second measured distance L2 is not greater than 0.4mm, it indicates that the degree of symmetry of the leaf spring 100 is acceptable, and otherwise, it is not.

Optionally, the first measuring part 22 and the second measuring part 32 are both vernier calipers, so that materials are easy to obtain, the measurement is convenient, and the measurement precision is high.

Preferably, the first base 21 and the second base 31 are provided on the same mount 10. Along the length direction of leaf spring 100, the position of first base 21 and second base 31 on mount pad 10 is adjustable to the leaf spring 100 of adaptation different specifications for first measuring member 22 and second measuring member 32 can just right with central bolt 120, so as to can accurately measure the symmetry. Illustratively, the mounting seat 10 is provided with a guide sliding groove extending along the length direction of the leaf spring 100, and the first base 21 and the second base 31 are both provided with a guide sliding rail, and the guide sliding rail cooperates with the guide sliding groove to realize the position adjustment of the first base 21 and the second base 31 in the length direction of the leaf spring 100.

Preferably, the measuring jig for the leaf spring further comprises a second sleeve, and the second sleeve can be detachably sleeved on the central bolt 120. During actual measurement, the first measuring part 22 and the second measuring part 32 respectively measure the distance from the first reference surface 211 to the outer wall of the second sleeve, the second reference surface 311 to the outer wall of the second sleeve, the central bolt 120 is a hexagon bolt, the bolt head is in a hexagon shape, the measuring clamping state is not fixed, the second sleeve is added during measurement, the second sleeve is used as a measuring reference, and the measuring elements are changed from the hexagonal outer peripheral wall of the bolt to the circular outer peripheral wall of the second sleeve, so that the measuring error can be reduced, and the measuring precision is improved.

In this embodiment, the first pressing member 14 includes a first screw, and the first screw is threaded through and connected to the first positioning seat 12, so as to adjust the position of the first positioning seat 12, and the first pressing member 14 can press the tab 110 onto the second positioning seat 13. The second pressing member 15 includes a second screw, and the second screw is threaded through the second positioning seat 13, so as to adjust the position of the second pressing member on the second positioning seat 13, so that the second pressing member 15 can press the tab 110 onto the first positioning seat 12.

Preferably, the two positioning assemblies 1 are a first positioning assembly and a second positioning assembly, respectively. In the first positioning assembly, the first positioning seat 12 and the second positioning seat 13 are both provided with a clamping groove 123, and two ends of the corresponding positioning rod 11 are respectively clamped in the clamping grooves 123 of the first positioning seat 12 and the second positioning seat 13, so as to prevent the positioning rod 11 from sliding on the first positioning seat 12 and the second positioning seat 13. In the second positioning assembly, the first positioning seat 12 and the second positioning seat 13 are not provided with the clamping groove 123, so that the corresponding positioning rod 11 can have a certain sliding amount in the first positioning seat 12 and the second positioning seat 13 to adapt to the leaf springs 100 with different lengths.

The measuring jig for the leaf spring of the present embodiment further includes a half-chord length measuring device 2a for measuring a half-chord length. The half-chord length measuring device 2a includes a third base 4 and a third measuring member 5. The third base 4 is located between the two positioning assemblies 1. Referring to fig. 1 and 6, the third base 4 includes a third reference surface 41. Illustratively, the third reference surface 41 is an end surface of the third base 4 near the first positioning component. The third reference surface 41 is spaced from the first positioning member by a third predetermined distance along the length of the leaf spring 100, indicated by L0, i.e. the third base 4, the first positioning member and the second positioning member are positioned at predetermined relative positions and relative distances before the half chord length measurement is taken.

In actual measurement, the third measuring element 5 measures the distance (in the longitudinal direction of the leaf spring 100) of the third reference surface 41 from the center bolt 120, and sets the third measured distance as L3. The third preset distance L0 and the third measured distance L3 are summed, and then the radius of the center bolt 120 is subtracted, so as to obtain the half-chord length of the leaf spring 100.

Alternatively, similar to the above symmetry measurement, when the half-chord length measurement is performed, a second sleeve may be sleeved on the center bolt 120, and at this time, the diameter of the second sleeve is set to be d, the third preset distance L0 and the third measurement distance L3 are summed, and then a half of the diameter d of the second sleeve is subtracted, so as to obtain the half-chord length of the leaf spring 100.

Exemplarily, the third measuring part 5 is a vernier caliper, which is easy to obtain materials, convenient to measure and high in measuring accuracy. Preferably, the third base 4 is also disposed on the mounting seat 10, so as to save the arrangement space of the whole measuring tool.

Referring to fig. 1 and 7, the measuring jig for a leaf spring of the present embodiment further includes an arc height measuring device 3a for performing arc height measurement. The arc height measuring device 3a includes a target 6 and a first sleeve 7. The first sleeve 7 is used for being sleeved outside the central bolt 120. The first sleeve 7 is arranged on the mark post 6. The post 6 is movable to enable the first sleeve 7 to be aligned with the central bolt 120. The first sleeve 7 can slide along the marker post 6 so that the first sleeve 7 is sleeved on the central bolt 120, and when the end surface of the first sleeve 7 is attached to the surface of the main piece of the leaf spring 100, the arc height of the leaf spring 100 can be obtained by measuring the position height of the first sleeve 7 on the marker post 6.

Preferably, the post 6 is provided with a scale for indicating the distance. The scale values are continuously increased from bottom to top along the marker post 6. The zero point scale located at the bottom of the target 6 is located at the same height as the axis of the positioning rod 11 (i.e., the center of the first end surface 111 and the second end surface 112 of the lug 110). The camber of the leaf spring 100 can be obtained by reading the corresponding scale of the end face of the first sleeve 7, which is attached to the surface of the main piece of the leaf sleeve, on the marker post 6.

In the present embodiment, referring to fig. 1 and 7, the first sleeve 7 includes a sleeve body 71, a connecting portion 72, and a sliding portion 73. The connecting portion 72 connects the cartridge body 71 and the sliding portion 73. The cylinder body 71 is sleeved on the center bolt 120. The sliding portion 73 is cylindrical and is slidably fitted to the post 6. The upper end surface of the cylinder body 71 (i.e., the end surface of the cylinder body 71 that abuts the surface of the main piece of the leaf spring 100) is flush with the upper end surface of the slide portion 73. When the upper end surface of the cylinder body 71 is attached to the surface of the main piece of the leaf spring 100, the scale value of the mark post 6 aligned with the upper end surface of the sliding portion 73 is the arc height of the leaf spring 100.

Of course, in another embodiment, no scale may be provided on the post 6, and only the post 6 may be provided with an indicating structure that is at the same height as the axis of the positioning rod 11 (i.e., the center of the end surface of the lug 110). When the upper end surface of the first sleeve 7 is attached to the surface of the main piece of the leaf spring 100, the distance from the upper end surface of the first sleeve 7 to the indicating structure is measured by a measuring tool with a vernier caliper at equal intervals, that is, the arc height of the leaf spring 100. The indication structure may be an indication line or the like engraved on the post 6, and is not limited herein.

Preferably, the arc height measuring device 3a further comprises a first guide rail 8 and a second guide rail 9. The first guide rail 8 extends along a first direction, the second guide rail 9 extends along a second direction, the second guide rail 9 is slidably disposed on the first guide rail 8, the target 6 is slidably disposed on the second guide rail 9, and the first sleeve 7 on the target 6 can be aligned with the central bolt 120 by adjusting the position of the second guide rail 9 on the first guide rail 8 and the position of the target 6 on the second guide rail 9.

In this embodiment, the first direction is the longitudinal direction of the leaf spring 100, and the second direction is the width direction of the leaf spring 100.

Optionally, referring to fig. 1 and 8, the measuring jig for a leaf spring of the present embodiment further includes a base 20, and the base 20 includes a substrate 201 and a leg 202 for supporting the substrate 201. The bottom ends of the legs 202 are provided with feet 203 to facilitate leveling of the base plate 201. The above-described symmetry measuring apparatus 1a, half-chord length measuring apparatus 2a, and arc height measuring apparatus 3a are all provided on the substrate 201.

The measuring jig for the leaf spring provided by the embodiment can measure the symmetry, the arc height and the half chord length of the leaf spring 100, and has high measuring precision and measuring efficiency.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a measurement tool for leaf spring, leaf spring includes central bolt (120) and two book ears (110), book ear (110) are including relative first terminal surface (111) and second terminal surface (112), its characterized in that, a measurement tool for leaf spring includes symmetry measuring device (1a), symmetry measuring device (1a) includes locating component (1), first measuring component (2) and second measuring component (3), two locating component (1) is configured to divide and locates leaf spring's length direction's both ends, locating component (1) includes:

a positioning rod (11) configured to be inserted into the eye (110);

the first positioning seat (12) and the second positioning seat (13) are respectively arranged at two ends of the rolling lug (110), and one side surfaces, opposite to each other, of the first positioning seat (12) and the second positioning seat (13) are respectively a first positioning surface (121) and a second positioning surface (131);

a first pressing member (14) configured to press the tab (110) against the second positioning surface (131);

a second pressing member (15) configured to press the tab (110) against the first positioning surface (121);

the first measuring component (2) is configured to measure the distance from the center bolt (120) to a line connecting the centers of the first end faces (111) of the two lugs (110), and the second measuring component (3) is configured to measure the distance from the center bolt (120) to a line connecting the centers of the second end faces (112) of the two lugs (110).

2. The measuring gauge for leaf springs according to claim 1, characterized in that said first measuring assembly (2) comprises a first base (21) and a first measuring piece (22), said second measuring assembly (3) comprises a second base (31) and a second measuring piece (32), said first base (21) and said second base (31) being located between two of said positioning assemblies (1), said first base (21) comprising a first reference surface (211), said second base (31) comprising a second reference surface (311);

in the width direction of the leaf spring, the first reference surface (211) and the first positioning surface (121) are arranged at a first preset distance interval, the second reference surface (311) and the second positioning surface (131) are arranged at a second preset distance interval, the first measuring piece (22) is used for measuring the distance between the first reference surface (211) and the central bolt (120) in the width direction of the leaf spring, and the second measuring piece (32) is used for measuring the distance between the second reference surface (311) and the central bolt (120) in the width direction of the leaf spring.

3. The measuring device for a leaf spring according to claim 1, characterized in that the first pressing piece (14) is arranged on the first positioning seat (12) in a position-adjustable manner, and the second pressing piece (15) is arranged on the second positioning seat (13) in a position-adjustable manner.

4. The measuring jig for the leaf spring according to claim 3, characterized in that the first pressing piece (14) comprises a first screw, the first screw is connected to the first positioning seat (12) in a threaded manner; and/or the second pressing piece (15) comprises a second screw rod, and the second screw rod is in threaded connection with the second positioning seat (13).

5. The measuring jig for the leaf spring according to claim 1, characterized in that two ends of the positioning rod (11) extending out of the rolling lug (110) are respectively arranged on the first positioning seat (12) and the second positioning seat (13).

6. The measuring jig for the leaf spring according to claim 5, characterized in that two of the positioning assemblies (1) are respectively a first positioning assembly and a second positioning assembly, in the first positioning assembly, a clamping groove (123) is respectively arranged on the first positioning seat (12) and the second positioning seat (13), and two ends of the corresponding positioning rod (11) are respectively clamped in the clamping grooves (123) of the first positioning seat (12) and the second positioning seat (13).

7. The measuring jig for the leaf spring according to claim 1, characterized by further comprising a half chord length measuring device (2a), wherein the half chord length measuring device (2a) comprises a third base (4) and a third measuring member (5), wherein the third base (4) is located between the two positioning assemblies (1), and the third base (4) comprises a third reference surface (41);

and the distance between the third reference surface (41) and one positioning assembly (1) is a third preset distance along the length direction of the leaf spring, and the third measuring piece (5) is used for measuring the distance between the third reference surface (41) and the central bolt (120) in the length direction of the leaf spring.

8. The measuring jig for the leaf spring according to claim 1, characterized by further comprising an arc height measuring device (3a), wherein the arc height measuring device (3a) comprises a mark post (6) and a first sleeve (7), the mark post (6) is movable, the first sleeve (7) is slidably connected to the mark post (6), the first sleeve (7) is configured to be sleeved outside the central bolt (120), the end surface of the first sleeve (7) is fitted to the upper surface of the main piece of the leaf spring, and the height of the first sleeve (7) on the mark post (6) is measurable.

9. The measuring jig for the leaf spring according to claim 8, characterized in that the arc height measuring device (3a) further comprises a first guide rail (8) and a second guide rail (9), the first guide rail (8) extends along a first direction, the second guide rail (9) extends along a second direction, the second guide rail (9) is slidably arranged on the first guide rail (8), and the mark post (6) is slidably arranged on the second guide rail (9).

10. The measuring fixture for a leaf spring according to any one of claims 1-7, further comprising a second sleeve configured to be sleeved on the center bolt (120).