Forklift mast H-shaped steel roller positioning surface width measuring tool

Abstract

The utility model relates to the technical field of steel detection, in particular to a forklift portal H-shaped steel roller positioning surface width measuring tool, which comprises a vernier caliper and a positioning support frame, the vernier caliper comprises a caliper body, an inner diameter fixed claw and an inner diameter movable claw, and the positioning support frame is slidably arranged on the caliper body. The bottom faces of the positioning supporting frame, the inner diameter fixed claw and the inner diameter movable claw are flush, the positioning supporting frame is arranged between the inner diameter fixed claw and the inner diameter movable claw, a height-adjustable supporting base is arranged at the bottom of the positioning supporting frame, and the bottom face of the height-adjustable supporting base is parallel to the bottom face of the positioning supporting frame and the bottom face of the ruler body. The supporting frame with the height-adjustable supporting base is arranged between the inner diameter fixed claw and the inner diameter movable claw, the height of the height-adjustable supporting base is adjusted to be the same as the distance according to the distance between the web in the H-shaped steel inner groove and the roller positioning face in advance, and then the accurate size of the roller positioning face can be measured.

Description

Technical Field

[0001] The utility model relates to the technical field of steel detection, in particular to a measuring tool for measuring the width of the positioning surface of the H-shaped steel roller of a forklift mast. Background Technique

[0002] A forklift is an efficient, multi-functional and safe industrial handling vehicle, designed specifically for modern logistics and warehousing management, equipped with a powerful power system and precise operation control, while paying attention to energy conservation, emission reduction and operation convenience. The lifting mast of a forklift is an important part of the forklift, mainly used to support and lift goods, and realizes the lifting of goods through a hydraulic system to meet the handling needs at different heights. At the same time, it also plays a role in balancing the forklift to ensure the stability of the forklift during driving and handling.

[0003] H-shaped steel is generally used in the middle mast and inner mast of a forklift, including two oppositely arranged wing plates and a web connecting the middle positions of the wing plates, and each wing plate is divided into two half-wing plates with the same length.

[0004] During forklift assembly, adjacent H-shaped steels of the forklift mast are connected to each other through rollers arranged in the inner groove. In the theoretical design, after the roller is installed in the inner groove of the H-shaped steel, two contact points between the roller and the side wall of the inner groove of the steel form a theoretical contact surface, and this theoretical contact surface is defined as the roller positioning surface. The distance between the roller positioning surface and the horizontal section of the steel web is s, and its theoretical width is equal to the diameter of the roller. When the selected roller diameter is equal to the width d of the positioning surface here, the best design effect can be obtained after the mast is assembled.

[0005] In actual production, due to the wide dimensional tolerance range of the H-shaped steel produced by hot rolling, forklift manufacturers often design multiple roller diameters within the allowable tolerance range of d, and select rollers with appropriate diameters for assembly according to the actual roller positioning surface width of the steel. To achieve good assembly effects, for steel manufacturers, it is necessary to make the width here of the steel close to the theoretical design value during production. Inaccurate dimension measurement will lead to misjudging qualified products as unqualified products or misjudging unqualified products as qualified products, misleading production regulation and causing economic losses; for forklift manufacturers, accurately measuring the width here helps to select appropriate diameter rollers. Inaccurate measurement will lead to incorrect roller selection, and then difficulties in assembly and affect production efficiency.

[0006] At present, manufacturers mainly rely on vernier calipers or upper and lower limit templates to measure the width of the roller positioning surface in the inner groove of the H-shaped steel of the forklift mast, while forklift manufacturers use rollers and feeler gauges for inspection and roller selection. However, the above methods all have certain defects: the roller positioning surface in the inner groove of the H-shaped steel is 5-20mm away from the web, and it is difficult for ordinary vernier calipers to accurately locate the measuring point of the roller positioning surface. At the same time, the inner wall of the wing plate of the H-shaped steel of the mast usually forms an angle of 91°-92° with the web, and there are generally arcs of varying radii as transitions at the connection between the inner side of the wing plate and the web. It is also difficult to replace the direct measurement of the width of the roller positioning surface with the indirect method of measuring the bottom of the wing plate groove or the opening position of the wing plate instead of the direct measurement of the roller positioning surface width; the upper and lower limit templates can only make a qualitative judgment on whether the steel size is qualified, and have no quantitative guidance for the selection of rollers. The method of using rollers with feeler gauges requires the preparation of multiple rollers for repeated testing, which is time-consuming. Therefore, in actual measurement, the dimension measurement and positioning at this location is difficult and time-consuming, and measurement errors are prone to occur, which affects the measurement accuracy and the production efficiency of both the supply and demand sides.

[0007] To sum up, how to quickly and accurately measure the width of the inner roller positioning surface of the gantry H-beam to reduce the measurement time, reduce the measurement error, and thereby improve the measurement accuracy and the steel production qualification rate and gantry production efficiency is a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0008] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a forklift gantry H-shaped steel roller positioning surface width measuring tool, which can accurately measure the width of the H-shaped steel inner groove roller positioning surface by setting a height-adjustable support base.

[0009] In order to achieve the above technical effects, the utility model adopts the following technical solutions:

[0010] A forklift gantry H-shaped steel roller positioning surface width measuring tool comprises a vernier caliper and a positioning support frame, the vernier caliper comprises a ruler body, an inner diameter fixed claw and an inner diameter movable claw, the positioning support frame is slidably arranged on the ruler body, the bottom surfaces of the positioning support frame, the inner diameter fixed claw and the inner diameter movable claw are flush, and the positioning support frame is arranged between the inner diameter fixed claw and the inner diameter movable claw, and a height-adjustable support base is provided at the bottom of the positioning support frame, and the bottom surface of the height-adjustable support base is parallel to the bottom surface of the positioning support frame and the bottom surface of the ruler body.

[0011] The measuring tool provided by the present utility model is provided with a support frame with a height-adjustable support base between the inner diameter fixed claw and the inner diameter movable claw. During specific use, the height of the height-adjustable support base can be adjusted to be the same as the distance between the web and the roller positioning surface in the inner groove of the H-shaped steel in advance. At the same time, the bottom surfaces of the height-adjustable support base, the positioning support frame, and the measuring body are parallel to each other. When the bottom surface of the height-adjustable support base is placed on the web, it can be ensured that both the inner diameter fixed claw and the inner diameter movable claw can respectively correspond to both ends of the roller positioning surface, and the accurate size of the roller positioning surface can be measured.

[0012] Preferably, the height-adjustable support base includes a screw rod, a screw rod sleeve, and a bottom plate. The top end of the screw rod is detachably arranged on the bottom surface of the positioning support frame. The inner part of the screw rod sleeve is provided with an internal thread, and the screw rod sleeve is threadedly connected with the screw rod. The bottom end of the screw rod sleeve is fixed to the top surface of the bottom plate.

[0013] Preferably, the measuring body is provided with size scales, and the zero point of the size scales is flush with the left side of the inner diameter fixed claw.

[0014] Preferably, the inner diameter movable claw is slidably arranged on the measuring body through a reading slider fixedly connected to its top end. The reading slider is provided with vernier scales, and the zero point of the vernier scales is flush with the right side of the inner diameter movable claw.

[0015] Further preferably, the left side surface of the inner diameter fixed claw is perpendicular to the measuring body, and the right side surface of the inner diameter movable claw is perpendicular to the measuring body.

[0016] Preferably, the positioning support frame is slidably arranged on the measuring body through a support frame slider fixedly connected to its top end.

[0017] Further preferably, the support frame slider is provided with a support frame limit screw, and the reading slider is provided with an inner diameter movable claw limit screw.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. The measuring tool provided by the present utility model is provided with a support frame with a height-adjustable support base between the inner diameter fixed claw and the inner diameter movable claw. During specific use, the height of the height-adjustable support base can be adjusted to be the same as the distance between the web and the roller positioning surface in the inner groove of the H-shaped steel in advance. At the same time, the bottom surfaces of the height-adjustable support base, the positioning support frame, and the measuring body are parallel to each other. When the bottom surface of the height-adjustable support base is placed on the web, it can be ensured that both the inner diameter fixed claw and the inner diameter movable claw can respectively correspond to both ends of the roller positioning surface, and the accurate size of the roller positioning surface can be measured.

[0020] 2. By arranging the support frame limit screw and the inner diameter movable claw limit screw, the measuring tool can quickly measure the width of the roller positioning surface in the inner groove of the H-shaped steel of the same batch, effectively improving the operation efficiency. Description of the Drawings

[0021] Figure 1 is a schematic structural view of a measuring tool for measuring the width of the roller positioning surface of the H-shaped steel of a forklift mast provided in Embodiment 1;

[0022] Figure 2 is a schematic structural view of the H-shaped steel of a forklift mast;

[0023] Figure 3 is a view of the use state of the measuring tool for measuring the width of the roller positioning surface of the H-shaped steel of a forklift mast provided in Embodiment 1;

[0024] Wherein, 1. body of the measuring tool; 2. support frame slider; 3. support frame limit screw; 4. reading slider; 5. inner diameter movable jaw limit screw; 6. inner diameter fixed jaw; 7. positioning support frame; 8. inner diameter movable jaw; 9. height-adjustable support base; 10. H-shaped steel of forklift mast; 11. wing plate; 12. web; 13. roller positioning surface. Detailed Embodiments

[0025] The present utility model will be further described below with reference to the drawings and embodiments.

[0026] Embodiment 1

[0027] A measuring tool for measuring the width of the roller positioning surface of the H-shaped steel of a forklift mast, as Figure 1 shown, includes a vernier caliper and a positioning support frame 7. The vernier caliper includes a body of the measuring tool 1, an inner diameter fixed jaw 6 and an inner diameter movable jaw 8. The positioning support frame 7 is slidably arranged on the body of the measuring tool 1. The bottom surfaces of the positioning support frame 7, the inner diameter fixed jaw 6 and the inner diameter movable jaw 8 are flush, that is, the bottom surface of the inner diameter fixed jaw 6 and the length h1 of the body of the measuring tool 1, the bottom surface of the positioning support frame 7 and the length h2 of the body of the measuring tool 1, and the length h3 between the inner diameter movable jaw 8 and the body of the measuring tool 1 are all the same. And the positioning support frame 7 is arranged between the inner diameter fixed jaw 6 and the inner diameter movable jaw 8. The bottom of the positioning support frame 7 is provided with a height-adjustable support base 9, and the bottom surface of the height-adjustable support base 9 is parallel to the bottom surfaces of the positioning support frame 7 and the body of the measuring tool 1. The body of the measuring tool 1 is provided with size scales, and the zero point of the size scales is flush with the left side of the inner diameter fixed jaw 6. The inner diameter movable jaw 8 is slidably arranged on the body of the measuring tool through a reading slider 4 fixedly connected to its top end. The reading slider 4 is provided with vernier scales, and the zero point of the vernier scales is flush with the right side of the inner diameter movable jaw 8. The left side surface of the inner diameter fixed jaw 6 is perpendicular to the body of the measuring tool 1, and the right side surface of the inner diameter movable jaw 8 is perpendicular to the body of the measuring tool 1. The positioning support frame 7 is slidably arranged on the body of the measuring tool 1 through a support frame slider 2 fixedly connected to its top end. The support frame slider 2 is provided with a support frame limit screw 3, and the reading slider 4 is provided with an inner diameter movable jaw limit screw 5.

[0028] In this embodiment, the height-adjustable support base 9 (the specific structure is not shown in the figure) includes a screw rod, a screw rod sleeve and a bottom plate. The top end of the screw rod is detachably arranged on the bottom surface of the positioning support frame 7. The inner part of the screw rod sleeve is provided with internal threads, and the screw rod sleeve is threadedly connected with the screw rod. The bottom end of the screw rod sleeve is fixed to the top surface of the bottom plate.

[0029] During specific use, as Figure 2 shown, the forklift mast H-beam 10 includes two vertical wing plates 11 on both sides and a middle horizontal web 12. There is an arc transition between the web 12 and the wing plates 11. At the horizontal position s from the web 12, it is the roller positioning surface, and its width is d. As Figure 3 shown, first place the forklift mast H-beam 10 horizontally so that the wing plates 11 are in the vertical state. After determining the distance s between the roller positioning surface 13 and the web 12 according to the design drawing of the forklift manufacturer, adjust the height h4 of the height-adjustable support base 9 to make h4 equal to s. Horizontally adjust the support frame slider 2 so that the support frame slider 2 drives the positioning support frame 7 and the height-adjustable support base 9 to be at the horizontal position of the web 12. After tightening the support frame limit screw 3, place the bottom surface of the height-adjustable support base 9 on the top surface of the web 12, make the left end of the bottom surface of the inner diameter fixed claw 6 contact the left inner wall of the wing plate 11, and horizontally adjust the reading slider 4 so that the right end of the bottom surface of the inner diameter movable claw 8 contacts the right inner wall of the wing plate 11. After tightening the inner diameter movable claw limit screw 5, the reading can be taken, and this reading is the width of the roller positioning surface 13 of the forklift mast H-beam.

Claims

1. A forklift gantry H-beam roller positioning surface width measuring tool, characterized in that: The invention comprises a vernier caliper and a positioning support frame (7), wherein the vernier caliper comprises a ruler body (1), an inner diameter fixed claw (6) and an inner diameter movable claw (8), wherein the positioning support frame (7) is slidably arranged on the ruler body (1), wherein the bottom surfaces of the positioning support frame (7), the inner diameter fixed claw (6) and the inner diameter movable claw (8) are flush, and the positioning support frame (7) is arranged between the inner diameter fixed claw (6) and the inner diameter movable claw (8), and a height-adjustable support base (9) is arranged at the bottom of the positioning support frame (7), wherein the bottom surface of the height-adjustable support base (9) is parallel to the bottom surface of the positioning support frame (7) and the bottom surface of the ruler body (1).

2. The forklift gantry H-beam roller positioning surface width measuring tool as claimed in claim 1, characterized in that: The height-adjustable support base (9) comprises a screw, a screw sleeve and a base plate, the top end of the screw is detachably arranged on the bottom surface of the positioning support frame (7), the screw sleeve is provided with an internal thread, the screw sleeve is threadedly connected to the screw, and the bottom end of the screw sleeve is fixed to the top surface of the base plate.

3. The forklift gantry H-beam roller positioning surface width measuring tool as claimed in claim 2, characterized in that: The ruler body (1) is provided with a size scale, and the zero point of the size scale is flush with the left side of the inner diameter fixing claw (6).

4. The forklift gantry H-beam roller positioning surface width measuring tool as claimed in claim 3, characterized in that: The inner diameter movable claw (8) is slidably arranged on the ruler body through a reading slider (4) fixedly connected to the top end thereof. A vernier scale is arranged on the reading slider (4), and the zero point of the vernier scale is flush with the right side of the inner diameter movable claw (8).

5. The forklift gantry H-beam roller positioning surface width measuring tool as claimed in claim 4, characterized in that: The left side surface of the inner diameter fixed claw (6) is perpendicular to the ruler body (1), and the right side surface of the inner diameter movable claw (8) is perpendicular to the ruler body (1).

6. The forklift gantry H-beam roller positioning surface width measuring tool as claimed in claim 5, characterized in that: The positioning support frame (7) is slidably arranged on the ruler body (1) via a support frame slider (2) fixedly connected to the top end thereof.

7. The forklift gantry H-beam roller positioning surface width measuring tool as claimed in claim 6, characterized in that: The support frame slider (2) is provided with a support frame limit screw (3), and the reading slider (4) is provided with an inner diameter movable claw limit screw (5).

Images