Forklift mast detection device

Abstract

The utility model provides a kind of forklift gantry detection device, mainboard, outer cover, hook plate, fixed plate, the outer surface of the mainboard is fixedly connected with outer cover, the both ends of the mainboard are fixedly connected with hook plate, the hook plate is bent shape;The side surface of the hook plate is fixedly connected with fixed plate;The four corners of the fixed plate side surface are fixedly connected with joint.The utility model has the advantages that: the detection end of dial gauge is active on the surface of gantry, the width change of gantry can be presented from the reading of dial gauge, when the width size of gantry deviates from standard size (i.e. the reference size preset by device itself) due to deformation (such as local indentation or protrusion), this deviation amount (ΔW) will be directly converted into the pressure change that dial gauge detection end receives. The width size of gantry can be quickly detected whether qualified by using the device to pass through on gantry quickly, and the operation is efficient, and the result is intuitive, meanwhile, the detection track of dial gauge is adjustable, and flexible to use.

Description

Technical Field

[0001] This utility model relates to the field of forklift inspection technology, and in particular to a forklift mast inspection device. Background Technology

[0002] As the core load-bearing structure of a forklift's lifting device, the geometric accuracy of the mast (including width, opening dimensions, and parallelism) directly determines its assembly quality, lifting stability, and operational safety. During production, use, or maintenance, the mast is prone to localized dents, bulges, or overall deformation due to factors such as welding deformation, external impacts, load stress, or material fatigue, causing the mast's width to deviate from the design standard. This deviation can lead to problems such as roller jamming, abnormal chain wear, and asynchronous lifting, and even safety accidents like cargo tipping. Currently, the methods for inspecting the mast's width mainly rely on the following, which have significant limitations: The manual indirect measurement method involves operators using a tape measure or calipers to measure the outward opening dimensions of the gantry, and then indirectly calculating the inward opening dimensions by subtracting the thickness of the channel steel. This method has multiple sources of error: Measuring tapes have low accuracy, and manual readings are easily affected by viewing angles; the inspection time for a single mast is long, resulting in low inspection efficiency. Therefore, a forklift mast inspection device is proposed to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0004] Therefore, one objective of this utility model is to provide a forklift mast detection device to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, one embodiment of the present invention provides a forklift mast detection device, including a main board, an outer sleeve, hook plates, and a fixing plate. The outer sleeve is fixedly connected to the outer surface of the main board, and hook plates are fixedly connected to both ends of the main board. The hook plates are bent. A fixing plate is fixedly connected to the side of the hook plate; The four corners of the side of the fixed plate are fixedly connected to the joints, and the inner side of the joints is movably connected to the rollers, which are elastic. The hook plate is threaded with a fastening pin, and the fixing plate is provided with a grooved track. A slider is movably connected in the grooved track. A main rod is fixedly connected to one side of the slider. A dial indicator is fixedly connected to the end of the main rod. A fastener is threaded onto the main rod and is tightened onto the surface of the fixed plate. The measuring end of the dial indicator is located inside the fixed plate.

[0006] Preferably, in any of the above solutions, the motherboard is welded to the outer casing, and the outer surface of the outer casing is fixedly connected with a number of transverse ribs.

[0007] The above technical solution is as follows: A device for measuring the width deviation of a forklift mast includes a main board, which is reinforced by an outer sleeve. The main board, outer sleeve, hook plate, and fixing plate are rigid as a whole. The main board has hook plates at both ends, which are movably connected to the protruding strips at the edge of the mast. The hook plates are fixedly connected to the sides of the hook plates. Rollers are installed at the four corners of the sides of the fixing plates, which can move on the surface of the mast. A grooved track is opened on the fixing plate, and a dial indicator is movably connected in the track. Its measuring end is movably connected to the surface of the mast. The dial indicator can be locked in position by fasteners.

[0008] This device is rigidly fitted onto the gantry and is matched to the standard precision gantry width. The main plate has hook plates at both ends that movably connect to the raised strips on the gantry edges. Rollers are installed at the four corners of the fixed plate, allowing it to move across the gantry surface. During movement, the dial indicator's measuring end moves across the gantry surface, and changes in gantry width are reflected in the dial indicator reading. When the gantry width deviates from the standard dimension (i.e., the device's preset reference dimension) due to deformation (such as localized dents or bulges), this deviation (ΔW) is directly converted into a pressure change on the dial indicator's measuring end. Using this device, a quick pass across the gantry quickly checks if the gantry width is within acceptable limits. The operation is efficient, the results are intuitive, and the dial indicator's measuring trajectory is adjustable, offering flexible use.

[0009] Preferably, in any of the above embodiments, the bending angle of the hook plate is ninety degrees, and the hook plate is movably connected to the protruding strip at the edge of the forklift mast.

[0010] Device components: The main board, a long, rectangular structure, is the core rigid support structure of the entire device. To enhance its rigidity and resist bending deformation that may occur during measurement, a jacket is welded and fixed to its outer surface (the side not in contact with the gantry). The jacket is preferably a square tubular structure, with several transversely arranged ribs welded and fixed to its outer surface, further improving the overall bending strength. The main board, jacket, hook plates, and fixing plates are connected by welding and other methods to form a rigid overall frame. The design dimensions of this rigid frame (especially the distance between the inner sides of the hook plates at both ends) are precisely matched to the standard precision gantry width.

[0011] At each end of the main board, a hook plate is fixedly connected. The hook plate has a specific bending shape with a bending angle of 90 degrees. This design allows the hook plate to precisely hook and move onto the raised strips on the edge of the forklift mast under test (such as the outer edge of the mast guide rail or reinforcing rib). Through the hook connection between the two hook plates and the raised strips on both sides of the mast, the device is precisely positioned relative to the mast in the main dimension.

[0012] A fixing plate is welded to the side of each hook plate (i.e., the side facing the gantry surface). The fixing plate is roughly rectangular in shape with a long, narrow grooved track. The grooved track runs along the length of the fixing plate, providing a guide path.

[0013] At each of the four corner points of the fixed plate, a joint is fixedly connected. A roller is movably connected to the inner side of each joint (e.g., via a pin). The rollers are preferably made of a material with a certain degree of elasticity (such as polyurethane rubber). Under the action of the elastic material, the four rollers can fit tightly against the surface of the forklift mast (usually the mast column plane). When the device moves, the rollers roll on the mast surface, driving the entire device to move smoothly along the length of the mast.

[0014] As before, a fastening pin is threaded onto the hook plate. This fastening pin can be used to further secure the hook plate to the gantry's raised strip for certain operations or when needed, providing additional stability (although the movable connection is usually sufficient for regular scanning movements).

[0015] A slider is slidably connected within the grooved track. The slider is designed in a T-shape (or dovetail shape, etc.) so that it can only slide along the length of the grooved track without disengaging. A main rod is fixedly connected to one side of the slider. The main rod extends approximately perpendicular to the plane of the fixed plate, and a dial indicator is fixedly mounted at its end. The measuring end (probe) of the dial indicator extends cantilevered from the main rod to the inside of the fixed plate, i.e., the side of the device facing the gantry surface. In use, the measuring end of the dial indicator, under the action of an elastic mechanism (integrated within the dial indicator), always contacts the gantry surface.

[0016] The main rod is threaded with fasteners, specifically nuts with washers or handle-type locking bolts. Once the slider, along with the dial indicator, is moved to the desired position in the slotted track on the main rod, the fasteners are tightened to press their end faces against the surface of the fixed plate, thus securely locking the dial indicator in that position. This design allows the dial indicator's position on the slotted track to be adjusted arbitrarily in the gantry width direction as needed and reliably locked, enabling the operator to flexibly set the position of the detection point.

[0017] Preferably, in any of the above embodiments, the fixing plate is welded to the hook plate, and the grooved track passes through the fixing plate.

[0018] Preferably, in any of the above solutions, the slider is T-shaped, and the fastener is a washer-nut.

[0019] Preferably, in any of the above schemes, the position of the dial indicator on the grooved track is adjustable and lockable.

[0020] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: This forklift mast inspection device is rigidly fitted onto the mast and is matched to a standard mast width. The main plate has hook plates at both ends that movably connect to raised strips on the mast edges. Rollers are installed at the four corners of the fixed plate, allowing movement across the mast surface. During movement, a dial indicator moves across the mast surface, and changes in mast width are reflected in the dial indicator readings. When the mast width deviates from the standard dimension (i.e., the device's preset reference dimension) due to deformation (such as localized dents or bulges), this deviation (ΔW) is directly converted into a pressure change on the dial indicator's testing end. Using this device, a quick pass across the mast quickly checks if the mast width is within acceptable limits. The operation is efficient, the results are intuitive, and the dial indicator's testing trajectory is adjustable, offering flexible use.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a first-view structural schematic diagram of the present invention; Figure 2 This is a structural schematic diagram of the present invention from a second perspective; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A; Figure 4 This is a top view of the structure of this utility model.

[0023] In the diagram: 1-Main board, 2-Outer sleeve, 3-Hook plate, 4-Fixing plate, 5-Connector, 6-Roller, 7-Fastening pin, 8-Slotted track, 9-Slider, 10-Main rod, 11-Dial indicator, 12-Fastener. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] like Figure 1-4 As shown, this forklift mast detection device includes a main board 1, an outer sleeve 2, a hook plate 3, and a fixing plate 4. The outer sleeve 2 is fixedly connected to the outer surface of the main board 1, and the hook plate 3 is fixedly connected to both ends of the main board 1. The hook plate 3 is bent. A fixing plate 4 is fixedly connected to the side of the hook plate 3; The four corners of the fixed plate 4 are fixedly connected to the connectors 5, and the inner side of the connectors 5 is movably connected to the rollers 6, which are elastic. The hook plate 3 is threaded with a fastening pin 7, and the fixing plate 4 is provided with a grooved track 8. A slider 9 is movably connected in the grooved track 8. A main rod 10 is fixedly connected to one side of the slider 9. A dial indicator 11 is fixedly connected to the end of the main rod 10. A fastener 12 is threaded onto the main rod 10 and is fastened to the surface of the fixed plate 4. The measuring end of the dial indicator 11 is located inside the fixed plate 4.

[0027] Example 1: The main board 1 is welded to the outer sleeve 2, and several transverse ribs are fixedly connected to the outer surface of the outer sleeve 2. The hook plate 3 has a bending angle of 90 degrees and is movably connected to the protruding strip at the edge of the forklift mast. The fixing plate 4 is welded to the hook plate 3, and the grooved track 8 passes through the fixing plate 4. The slider 9 is T-shaped, and the fastener 12 is a washer nut. The position of the dial indicator 11 on the grooved track 8 is adjustable and lockable.

[0028] Example 2: The main board 1 is the core rigid support structure of the entire device, and is elongated. To enhance the rigidity of the main board 1 and resist bending deformation that may occur during the measurement process, an outer sleeve 2 is welded and fixed to the outer surface of the main board 1 (i.e., the side that is not in contact with the gantry). The outer sleeve 2 is preferably a square tubular structure, and several transversely arranged ribs are also welded and fixed to its outer surface, further improving the bending strength of the overall structure. The main board 1, outer sleeve 2, hook plate 3, and fixing plate 4 are fixedly connected by welding and other methods to form a rigid overall frame. The design dimensions of this rigid frame (especially the distance between the inner sides of the hook plates 3 at both ends) are precisely matched with the standard precision gantry width dimensions.

[0029] At each end of the main board 1, a hook plate 3 is fixedly connected. The hook plate 3 has a specific bending shape, with a bending angle designed to be ninety degrees. This design allows the hook plate 3 to precisely hook and move onto the raised strips on the edge of the forklift mast under test (such as the outer edge of the mast guide rail or reinforcing rib). Through the hook connection between the two hook plates 3 and the raised strips on both sides of the mast, the device is precisely positioned relative to the mast in the main dimension.

[0030] A fixing plate 4 is welded to the side of each hook plate 3 (i.e., the side facing the gantry surface). The fixing plate 4 is roughly rectangular plate structure with a long strip-shaped groove track 8. The groove track 8 runs through the length of the fixing plate 4, providing a guide path.

[0031] At each of the four corner points of the fixed plate 4, a connector 5 is fixedly connected. A roller 6 is movably connected to the inner side of each connector 5 (e.g., via a pin). The rollers 6 are preferably made of a material with a certain degree of elasticity (such as polyurethane rubber). Under the action of the elastic material, the four rollers 6 can fit tightly against the surface of the forklift mast (usually the mast column plane). When the device moves, the rollers 6 roll on the mast surface, driving the entire device to move smoothly along the length of the mast.

[0032] As before, a fastening pin 7 is threaded onto the hook plate 3. This fastening pin 7 can be used to further secure the hook plate 3 to the gantry's raised strip in certain specific operations or when needed, providing additional stability (although the movable connection is usually sufficient during regular scanning movements).

[0033] A slider 9 is slidably connected within the grooved track 8. The slider 9 is designed in a T-shape (or dovetail shape, etc.) so that it can only slide along the length of the grooved track 8 without disengaging. A main rod 10 is fixedly connected to one side of the slider 9. The main rod 10 extends approximately perpendicular to the plane of the fixed plate 4, and a dial indicator 11 is fixedly mounted at its end. The measuring end (probe) of the dial indicator 11 extends cantilevered through the main rod 10 to the inner side of the fixed plate 4, i.e., the side of the device facing the gantry surface. In use, the measuring end of the dial indicator 11, under the action of the elastic mechanism (integrated within the indicator), always contacts the gantry surface.

[0034] A fastener 12 is threaded onto the main rod 10. This fastener 12 is either a nut with a washer or a handle-type locking bolt. After the slider 9, along with the dial indicator 11, moves to the desired position in the slotted track 8 on the main rod 10, the fastener 12 is tightened so that its end face presses against the surface of the fixing plate 4, thus securely locking the dial indicator 11 in that position. This design allows the position of the dial indicator 11 on the slotted track 8 to be arbitrarily adjusted and reliably locked in the width direction of the gantry as needed, thereby allowing the operator to flexibly set the position of the detection point.

[0035] The working principle of this utility model is as follows: Installation and Positioning: The operator "fits" the device onto the forklift mast to be tested. Specifically, the hook plates 3 at both ends of the device are hooked onto the corresponding (matching) edge protrusions on both sides of the mast. Since the design distance between the hook plates 3 at both ends of the main board 1 corresponds to the nominal width of a qualified mast, the positions of each component are determined and matched when the device is installed on a qualified mast.

[0036] The interaction between the contact plate and the rollers: After the device is hooked onto both sides of the gantry, it will naturally fall or slightly press down, causing the four elastic rollers 6 on the fixing plate 4 to press firmly against the gantry surface (usually the plane of the gantry column). The slight elastic deformation of the rollers 6 under pressure provides a suitable preload, ensuring contact stability when the device moves on the gantry, reducing measurement errors caused by vibration, and ensuring that the device can roll smoothly and with low friction along the length of the gantry. The outer sleeve 2 and the ribs greatly enhance the rigidity of the main plate 1, ensuring the dimensional stability of the device body during the measurement process and preventing bending deformation that could lead to measurement errors.

[0037] Dial indicator contact and initialization (optional, depending on the measurement method): For relative measurements (deviation measurements): the standard operating procedure of dial indicator 11 can be used to zero the gauge at a known standard location (such as the reference location of the gantry manufacturer or a region considered undeformed). The measurement value will then reflect the deviation (i.e., positive or negative) relative to that initial point.

[0038] If the installed device itself represents a standard size reference: when the device is installed on a qualified gantry of nominal size, the reading of dial indicator 11 in the set position should be close to zero (design target), at which point it can be considered that a relative reference has been established.

[0039] Slip detection: The operator holds the device and smoothly pushes the entire device along the length of the forklift mast (parallel to its guide rails). During the movement: The hook plates 3 at both ends are always hooked onto the raised strips on the edge of the gantry, providing guidance for the device and positioning reference in the main direction of the gantry width.

[0040] Four flexible rollers 6 roll on the gantry surface, supporting the device and ensuring its smooth movement.

[0041] Most importantly, the dial indicator 11, fixed in the grooved track 8, has its sensing end constantly pressed against the gantry surface (the same or adjacent plane in contact with the roller 6) along its moving path under the action of its built-in spring. When the width of the gantry deviates from the standard size (i.e., the preset reference size of the device) due to deformation (such as local dents or bulges), this deviation (ΔW) is directly converted into a change in pressure on the sensing end of the dial indicator 11. Specifically: If the gantry surface is concave inward along the measurement path (for example, the distance between the two columns is smaller than the standard value), the gantry surface will push the measuring rod of dial indicator 11 upward and retract it because the rigid main body of the device is of standard size. This will cause the dial indicator pointer to rotate in the negative (or decrease) direction / the digital value to decrease.

[0042] Conversely, if the gantry surface protrudes outward along the measurement path (for example, the distance between the two columns is greater than the standard value), the gantry surface will move away from the main body of the device, and the measuring rod of dial indicator 11 will extend further under the action of the internal spring, causing the dial indicator pointer to rotate in the positive (or increasing) direction / the digital value to increase.

[0043] Results Reading: The operator observes the dial indicator 11 reading in real time while smoothly pushing the device. The degree to which the value deviates from zero (or the set reference value) directly reflects the deviation (ΔW) of that point relative to the standard width dimension represented by the device (and the original design dimension of the gantry). The positive / negative indication on the dial or digital display indicates the direction of the deviation (bulge / dent). Acceptable dimensions should remain within the permissible error range of the dial indicator reading (e.g., ±0.05mm ~ ±0.1mm).

[0044] Track flexibility: By loosening the fastener 12, the lateral position of the slider 9 and its connected dial indicator 11 on the slotted track 8 can be adjusted, allowing selection of different paths (such as near the inner edge, center, or outer edge) for inspection in the gantry width direction to adapt to different inspection needs or points of interest. After adjustment, tightening the fastener 12 will secure the device.

[0045] Compared with the prior art, the present invention has the following advantages: This forklift mast inspection device is rigidly fitted onto the mast and is matched to the standard precision mast width dimension. The main plate 1 has hook plates 3 at both ends, which are movably connected to the raised strips at the mast edge. Rollers 6 are installed at the four corners of the side of the fixing plate 4, allowing it to move across the mast surface. During movement, the measuring end of a dial indicator 11 moves across the mast surface, and changes in mast width are reflected in the dial indicator 11 reading. When the mast width dimension deviates from the standard dimension (i.e., the preset reference dimension of the device) due to deformation (such as local dents or bulges), this deviation (ΔW) is directly converted into a pressure change on the measuring end of the dial indicator 11. Using this device, a quick pass across the mast can rapidly determine whether the mast width dimension is within acceptable limits. The operation is efficient, the results are intuitive, and the measuring trajectory of the dial indicator 11 is adjustable, making it flexible in use.

Claims

1. A forklift mast detection device, characterized in that, Includes a main board (1), an outer sleeve (2), a hook plate (3), and a fixing plate (4). The outer sleeve (2) is fixedly connected to the outer surface of the main board (1), and the hook plates (3) are fixedly connected to both ends of the main board (1). The hook plates (3) are bent. The hook plate (3) is fixedly connected to a fixing plate (4) on its side. The four corners of the side of the fixed plate (4) are fixedly connected to the joints (5), and the inner side of the joints (5) is movably connected to the rollers (6), which are elastic. The hook plate (3) is threaded with a fastening pin (7), and the fixing plate (4) is provided with a grooved track (8). A slider (9) is movably connected in the grooved track (8). A main rod (10) is fixedly connected to one side of the slider (9). A dial indicator (11) is fixedly connected to the end of the main rod (10). A fastener (12) is threaded onto the main rod (10). The fastener (12) is tightened onto the surface of the fixed plate (4). The detection end of the dial indicator (11) is located inside the fixed plate (4).

2. The forklift mast detection device as described in claim 1, characterized in that: The main board (1) is welded to the outer sleeve (2), and the outer surface of the outer sleeve (2) is fixedly connected with several transverse ribs.

3. The forklift mast detection device as described in claim 2, characterized in that: The bending angle of the hook plate (3) is ninety degrees, and the hook plate (3) is movably connected to the protruding strip at the edge of the forklift mast.

4. The forklift mast detection device as described in claim 3, characterized in that: The fixing plate (4) is welded to the hook plate (3), and the grooved track (8) passes through the fixing plate (4).

5. The forklift mast detection device as described in claim 4, characterized in that: The slider (9) is T-shaped, and the fastener (12) is a washer nut.

6. The forklift mast detection device as described in claim 5, characterized in that: The position of the dial indicator (11) on the grooved track (8) is adjustable and lockable.

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