Hydraulic swash plate flatness detection device

Abstract

The utility model discloses a hydraulic swash plate flatness detection device, and belongs to the technical field of hydraulic swash plate flatness detection. Comprising a handheld base, a plurality of equal-height stand columns capable of being supported at the bottom of the hydraulic swash plate and a set of pressing plates capable of pressing the top of the hydraulic swash plate, the equal-height base is arranged on the handheld base, and supporting points at the tops of the equal-height stand columns are located on the same datum plane; the handheld base is rotationally connected with a clamping seat capable of fixing the dial indicator, the rotating axis of the clamping seat is perpendicular to the reference plane, and a measuring head on the dial indicator can abut against the bottom of the hydraulic swash plate; the set of pressing plates are hinged to the end base, the end base is rotationally connected to the end of the fixing screw, the fixing screw is in threaded connection to the handheld base, and a supporting rod is detachably connected between the set of pressing plates. The hydraulic swash plate flatness detection device provided by the utility model solves the problems that the hydraulic swash plate flatness detection device in the prior art is not easy to carry and has high operation requirements.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic swash plate flatness detection, and particularly relates to a hydraulic swash plate flatness detection device. Background Art

[0002] Traditional methods for detecting the flatness of a hydraulic swash plate include using mechanical measuring tools (such as feeler gauges and dial indicators), coordinate measuring machines (CMMs), or laser interferometers, etc. Although these methods can provide high-precision measurements, they have many limitations, mainly manifested as: (a) High-precision equipment such as coordinate measuring machines and laser interferometers are expensive, and the equipment maintenance costs are high; (b) Existing equipment usually requires professional technicians to operate, and has high requirements for the experience of the operators; (c) The equipment is bulky and difficult to move and use at the production site, and is not suitable for flexible application in the workshop.

[0003] Therefore, there is an urgent need for a hydraulic swash plate flatness detection device that is simple and practical in structure and easy to operate and carry. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a hydraulic swash plate flatness detection device, which solves the problems that the existing hydraulic swash plate flatness detection device is not easy to carry and has high operation requirements.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a hydraulic swash plate flatness detection device, including a hand-held base, a plurality of equal-height columns that can support the bottom of the hydraulic swash plate, and a set of pressing plates that can press down on the top of the hydraulic swash plate. The equal-height base is arranged on the hand-held base, and the support points at the tops of the plurality of equal-height columns are located on the same reference plane;

[0006] A card seat for fixing a dial indicator is rotatably connected to the hand-held base. The rotation axis of the card seat is perpendicular to the reference plane, and the measuring head on the dial indicator can abut against the bottom of the hydraulic swash plate;

[0007] A set of the pressing plates are hinged to an end head seat, the end head seat is rotatably connected to the end of a fixing screw, the fixing screw is threadedly connected to the hand-held base, and a support rod is detachably connected between the set of pressing plates.

[0008] Optionally, one end of the equal-height column that supports the bottom of the hydraulic swash plate is semi-spherical, and a plurality of groups of threaded holes arranged in a circumferential array are provided on the hand-held base. The equal-height column is threadedly connected to the hand-held base through the threaded holes.

[0009] Optionally, a rubber gasket is provided on one side of the pressing plate that presses down on the hydraulic swash plate.

[0010] Optionally, an annular through hole is provided on the handheld base, and the measuring rod and the measuring head on the dial indicator can pass through the annular through hole and can slide along the annular through hole.

[0011] Optionally, the card seat is mounted on the handheld base through a bearing, a fixing through hole is provided on the card seat, and a fixing bolt capable of being embedded in the fixing through hole is threadedly connected to the card seat;

[0012] The fixing through hole can be sleeved on the outer periphery of the sleeve on the dial indicator.

[0013] Optionally, the number of the pressing plates is two, and a plurality of groups of corresponding card slots are provided on the opposite sides of the two pressing plates, and the end of the support rod can be embedded in the card slots.

[0014] Optionally, magnetic blocks capable of magnetically connecting with the pressing plates are respectively arranged at both ends of the support rod embedded in the card slots.

[0015] Optionally, the fixing screw extends to the handheld base, and an auxiliary rod is movably penetrated through one end of the fixing screw extending to the bottom of the handheld base.

[0016] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: The hydraulic swash plate is quickly fixed on the handheld base through the equal-height columns, pressing plates, support rods, fixing screws, etc. Then, the measuring head on the dial indicator slides along the bottom of the hydraulic swash plate in a stable state. By the change of the reading of the dial indicator, it can be quickly judged whether the flatness of the bottom of the hydraulic swash plate meets the standard. The hydraulic swash plate flatness detection device in this technical solution is small in volume, easy to carry, and at the same time has low requirements for the experience of operators. It can be used by hand, and the operation is convenient and fast. Brief Description of the Drawings

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0018] Figure 1 It is a schematic structural diagram of the hydraulic swash plate flatness detection device for fixing the hydraulic swash plate in the preferred embodiment of the present utility model;

[0019] Figure 2 It is a schematic structural diagram of the hydraulic swash plate flatness detection device in the preferred embodiment of the present utility model;

[0020] Wherein, 1. Handheld base; 101. Threaded hole; 102. Annular through hole; 2. Equal-height column; 3. Pressing plate; 301. Card slot; 4. Dial indicator; 5. Card seat; 6. End head seat; 7. Fixing screw; 8. Support rod; 801. Magnetic block; 9. Rubber gasket; 10. Bearing; 11. Fixing bolt; 12. Auxiliary rod. Detailed Description of the Embodiment

[0021] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0022] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If this specific posture changes, then such directional indications will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] As Figure 1 - Figure 2 shown, a hydraulic swash plate flatness detection device includes a hand-held base 1, a plurality of equal-height columns 2 that can support the bottom of the hydraulic swash plate, and a set of pressing plates 3 that can press down on the top of the hydraulic swash plate. The equal-height base is arranged on the hand-held base 1, and the support points at the tops of the plurality of equal-height columns 2 are located on the same reference plane; a clamp seat 5 capable of fixing a dial indicator 4 is rotatably connected to the hand-held base 1. The rotation axis of the clamp seat 5 is perpendicular to the reference plane, and the probe on the dial indicator 4 can contact the bottom of the hydraulic swash plate; a set of pressing plates 3 are hinged to an end seat 6, the end seat 6 is rotatably connected to the end of a fixing screw 7, the fixing screw 7 is threadedly connected to the hand-held base 1, and a support rod 8 is detachably connected between the set of pressing plates 3.

[0024] Specifically, the number of the equal-height columns 2 is not less than three, and the top of each equal-height column 2 can be used as a support point for supporting the hydraulic swash plate, and a reference plane is formed by a plurality of support points. As Figure 1As shown, the pressing plate 3 can pass through the hydraulic swash plate and be placed flat on the equal-height columns 2. A group of pressing plates 3 are unfolded to a suitable angle to press down on the hydraulic swash plate, and the opening angle of the pressing plates 3 is fixed by the support rod 8. A stable triangular structure is formed between the support rod 8 and the pressing plates 3. Then, the fixing screw 7 is rotated to increase the screw connection depth of the fixing screw 7 on the handheld base 1, so that a group of pressing plates 3 can be pressed down on the top of the hydraulic swash plate. Under the action of the pressing plate 3 and the equal-height columns 2, the hydraulic swash plate can be fixed on the handheld chassis in a suspended posture. Then, by rotating the holder 5 on the handheld base 1, the probe on the micrometer 4 can slide along the bottom of the hydraulic swash plate to detect the flatness of the bottom of the hydraulic swash plate.

[0025] Preferably, in the present technical solution, the probe on the micrometer 4 is perpendicular to the reference plane, that is, the direction of the probe jump is perpendicular to the reference plane. The specific test steps are: select at least three measuring points on the surface of the hydraulic swash plate. At the initial point (any position on the hydraulic swash plate that does not coincide with the measuring point), adjust the position of the micrometer 4 installed on the holder 5 so that its probe lightly touches the surface of the swash plate, so that it can be moved or rotated to multiple detection points for measurement. Then, when the micrometer 4 moves to a point, the indication reading of the micrometer 4 is recorded, and it is compared with the data of the micrometer 4 at the initial point, so as to calculate the height difference of each measuring point. Finally, by recording the height data of each measuring point, the flatness error of the surface of the hydraulic swash plate is calculated based on these data. The error calculation formula is as follows: △h=hmax-hmin, where hmax is the highest height, hmin is the lowest height, and △h is the flatness error. By comparing the error with the standard tolerance, it can be judged whether the flatness of the hydraulic swash plate meets the requirements.

[0026] The above, such as Figure 2 As shown, one end of the contour column 2 supported at the bottom of the hydraulic swash plate is semi-spherical to reduce the contact area between the contour column 2 and the hydraulic swash plate, so that the contour column 2 and the hydraulic swash plate are in point contact, and a plurality of groups of threaded holes 101 arranged in a circular array are provided on the handheld base 1, and the contour column 2 is threadedly connected to the handheld base 1 through the threaded holes 101, so that the position of the contour column 2 on the handheld chassis can be adjusted according to the size of the hydraulic swash plate.

[0027] The above, such as Figure 2 As shown, a rubber gasket 9 is provided on one side of the pressure plate 3 pressing down on the hydraulic swash plate to prevent the pressure plate 3 from damaging the surface of the hydraulic swash plate.

[0028] In this embodiment, an annular through hole 102 is provided on the handheld base 1, and the measuring rod and the probe on the micrometer 4 can pass through the annular through hole 102 and can slide along the annular through hole 102, so that the micrometer 4 can be installed under the handheld chassis, which is convenient for installation and observation of data.

[0029] Further, as Figure 1 shown, the card holder 5 is mounted on the handheld base 1 through the bearing 10. Preferably, the bearing 10 is of P4 grade. At the same time, a fixed through hole is provided on the card holder 5, and a fixed bolt 11 that can be embedded in the fixed through hole is threadedly connected to the card holder 5. The fixed through hole can be sleeved on the outer periphery of the sleeve on the dial indicator 4, and the sleeve of the dial indicator 4 can be fixed by the fixed bolt 11, that is, the dial indicator 4 can be fixed by the fixed bolt 11.

[0030] Further, as Figure 2 shown, the number of the pressing plates 3 is two, and the two pressing plates 3 are symmetrically arranged along the central axis of the fixed screw rod 7, so that the two pressing plates 3 can evenly press down on the hydraulic swash plate to prevent the hydraulic swash plate from tipping over. And a plurality of groups of corresponding card slots 301 are provided on the opposite sides of the two pressing plates 3. The end of the support rod 8 can be embedded in the card slot 301, and the slotting angle of the card slot 301 is adjusted according to the position, so that when the hydraulic swash plates of different specifications are used, the end of the support rod 8 can be stably embedded in the card slot 301. By supporting the support rod 8 at different positions on the pressing plate 3, the opening and closing angle between the two pressing plates 3 is adjusted, so as to ensure that a stable triangular structure can be formed between the two pressing plates 3 and the support rod 8, and at the same time, the pressing plate 3 is kept pressing stably on the hydraulic swash plate.

[0031] Further, as Figure 2 shown, magnetic blocks 801 capable of magnetically connecting with the pressing plate 3 are respectively arranged at both ends of the support rod 8 embedded in the card slot 301, which is convenient for disassembly.

[0032] Further, the fixed screw rod 7 extends to the handheld base 1, and an auxiliary rod 12 is movably penetrated through one end of the fixed screw rod 7 extending to the bottom of the handheld base 1, which is convenient for the operator to twist the fixed screw rod 7 by means of the auxiliary rod 12.

[0033] Working principle: The pressing plate 3 can pass through the hydraulic swash plate and be placed flat on the equal-height column 2. Expand a set of pressing plates 3 to an appropriate angle that can press down on the hydraulic swash plate, and fix the opening angle of the pressing plate 3 through the support rod 8. A stable triangular structure is formed by enclosing between the support rod 8 and the pressing plate 3. Then, the fixed screw rod 7 is rotated through the auxiliary rod 12, so that the pressing plate 3 presses down on the top of the hydraulic swash plate. Under the interaction of the pressing plate 3 and the equal-height column 2, the hydraulic swash plate can be fixed on the handheld chassis in a suspended state. Then, the dial indicator 4 is fixed on the card holder 5, and by rotating the card holder 5, the probe on the dial indicator 4 can slide along the bottom of the hydraulic swash plate to detect the flatness of the bottom of the hydraulic swash plate.

[0034] Based on the above enlightenment of the ideal embodiments of the present utility model, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A hydraulic swash plate flatness detection device, characterized in that: It includes a hand-held base (1), several equal-height columns (2) that can support the bottom of the hydraulic swashplate, and a set of pressing plates (3) that can press down on the top of the hydraulic swashplate. The equal-height columns are arranged on the hand-held base (1), and the support points at the tops of several equal-height columns (2) are located on the same reference plane; A clamp seat (5) capable of fixing a dial indicator (4) is rotatably connected to the hand-held base (1). The rotation axis of the clamp seat (5) is perpendicular to the reference plane, and the probe on the dial indicator (4) can contact the bottom of the hydraulic swashplate; A set of the pressing plates (3) are hinged to an end head seat (6). The end head seat (6) is rotatably connected to the end of a fixing screw (7). The fixing screw (7) is threadedly connected to the hand-held base (1), and a support rod (8) is detachably connected between the set of pressing plates (3).

2. The hydraulic swash plate flatness detection device according to claim 1, wherein: One end of the equal-height column (2) that supports the bottom of the hydraulic swashplate is semi-spherical, and several groups of threaded holes (101) arranged in a circumferential array are provided on the hand-held base (1). The equal-height column (2) is threadedly connected to the hand-held base (1) through the threaded holes (101).

3. The hydraulic swash plate flatness detection device according to claim 1, wherein: A rubber gasket (9) is provided on the side of the pressing plate (3) that presses down on the hydraulic swashplate.

4. The hydraulic swash plate flatness detection device according to claim 1, characterized in that: An annular through hole (102) is provided on the hand-held base (1). The measuring rod and the probe on the dial indicator (4) can pass through the annular through hole (102) and can slide along the annular through hole (102).

5. The hydraulic swash plate flatness detection device according to claim 1, characterized in that: The clamp seat (5) is installed on the hand-held base (1) through a bearing (10). A fixing through hole is provided on the clamp seat (5), and a fixing bolt (11) that can be embedded in the fixing through hole is threadedly connected to the clamp seat (5); The fixing through hole can be sleeved on the outer circumference of the sleeve on the dial indicator (4).

6. The hydraulic swash plate flatness detection device according to claim 1, wherein: The number of the pressing plates (3) is two, and several groups of corresponding card slots (301) are provided on the opposite sides of the two pressing plates (3). The end of the support rod (8) can be embedded in the card slots (301).

7. The hydraulic swash plate flatness detection device according to claim 6, wherein: Magnets (801) capable of magnetically connecting with the pressing plates (3) are respectively provided at both ends of the support rod (8) embedded in the card slots (301).

8. The hydraulic swash plate flatness detection device according to claim 1, characterized in that: The fixing screw (7) extends to the hand-held base (1), and an auxiliary rod (12) is movably penetrated through the end of the fixing screw (7) extending to the bottom of the hand-held base (1).

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