Fixing device for engine detection

Abstract

The utility model belongs to the technical field of locomotive engine cylinder maintenance, and discloses a fixing device for engine detection, which comprises a frame. The base platform is positioned above the rack; the pneumatic locking mechanism comprises an air cylinder, the air cylinder is installed at the bottom of the base platform, a connecting plate is installed on a piston rod of the air cylinder, the connecting plate is movably installed in the base platform, a profiling clamp is installed on the extending part of the connecting plate, a pressure sensor is arranged in the profiling clamp, and a polyurethane cushion pad is installed on the inner side of the profiling clamp; the damping assembly comprises a rubber-metal composite vibration isolation layer, a connecting seat is mounted at the bottom of the rubber-metal composite vibration isolation layer, and a hydraulic damper is mounted at the bottom of the connecting seat; and a limiting cylinder. The engine cylinder can be conveniently clamped and locked, deformation of a thin-wall cylinder can be avoided, vibration impact can be buffered and absorbed, and the surface of the cylinder is prevented from being scratched in the dismounting process.

Description

Technical Field

[0001] This utility model relates to the field of railway locomotive engine cylinder maintenance technology, and in particular to a fixing device for engine testing. Background Technology

[0002] Engine testing fixtures are specialized equipment used to stably secure engines during testing or maintenance. Their core function is to ensure that the engine remains accurately positioned during testing, preventing interference with test results due to vibration, displacement, or other factors.

[0003] Currently, when overhauling railway locomotive engine cylinders, simple brackets or manual lifting methods are often used for fixing. However, traditional fixing devices have the following drawbacks:

[0004] 1) Existing fixtures mostly use rigid locking, which can easily lead to deformation of thin-walled cylinders;

[0005] 2) Insufficient shock absorption performance, which can easily cause scratches on the cylinder surface during disassembly. Therefore, we propose a fixing device for engine testing. Utility Model Content

[0006] In view of the problems of existing fixing devices, such as the rigid locking of existing clamps, which easily leads to deformation of thin-walled cylinders and insufficient shock absorption performance, and easy to cause scratches on the cylinder surface during disassembly, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a fixing device for engine testing. Its purpose is to: by setting a pneumatic locking mechanism and a shock-absorbing component, it can easily clamp and lock the engine cylinder, avoid deformation of thin-walled cylinders, and buffer and absorb vibration impact to prevent scratches on the cylinder surface during disassembly.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] An engine testing fixture includes a frame, with a mounting bracket installed on the top of the frame;

[0010] A base platform, located above the frame;

[0011] A pneumatic locking mechanism includes four sets of cylinders arranged in a cross shape. The cylinders are installed at the bottom of the base platform. A connecting plate is installed on the piston rod of the cylinder. The connecting plate is movably installed in the base platform, and a contour clamp is installed on the protruding part. The contour clamp is equipped with a pressure sensor inside and a polyurethane buffer pad is installed on the inner side of the contour clamp.

[0012] The vibration damping assembly includes a rubber-metal composite vibration isolation layer installed on the bottom of the base platform, a connecting seat installed at the bottom of the rubber-metal composite vibration isolation layer, a hydraulic damper installed at the bottom of the connecting seat, and the hydraulic damper installed on the frame.

[0013] A limiting cylinder is installed on the frame and covers the shock absorption assembly. The outer surface of the limiting cylinder is movably connected to the base platform.

[0014] As a technical solution of the engine testing fixing device of the present invention, the base platform is provided with a sliding groove corresponding to the connecting plate, and the sliding groove is adapted to the connecting plate.

[0015] As a technical solution of the engine testing fixing device of the present utility model, the sliding groove is symmetrically provided with grooves on both sides, the connecting plate is provided with protrusions corresponding to the grooves respectively, and the protrusions are adapted to the grooves. The connecting plate is slidably installed on the base platform through the protrusions, the sliding groove and the groove.

[0016] As a technical solution of the engine testing fixing device of the present utility model, the bottom of the base platform has a plurality of integrally formed arc plates, and the outer surface of the limiting cylinder has integrally formed limiting edges corresponding to the arc plates respectively. When in motion, the arc plates are sleeved on the outer surface of the limiting cylinder, and the bottom of the arc plates and the top of the limiting edges make blocking contact.

[0017] As a technical solution of the engine testing fixing device of the present utility model, the top of the limiting cylinder is provided with a relief groove corresponding to the cylinder, and the height of the limiting edge is higher than the height of the bottom wall of the relief groove.

[0018] As a technical solution of the engine testing fixing device of the present utility model, a detachable laser cross positioner is installed at the bottom of the fixing frame. The laser cross positioner is located above the base platform, and the axis of the laser cross positioner coincides with the axis of the base platform.

[0019] As a technical solution of the engine testing fixture of this utility model, the frame is equipped with a PLC controller for controlling the cylinder, the pressure sensor and the laser cross positioner.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] 1. This utility model involves placing the engine cylinder on a base platform and using a PLC controller to activate a laser crosshair positioner for auxiliary positioning of the engine cylinder. Due to its weight, the base platform descends, while an arc-shaped plate moves against the outer surface of the limiting cylinder until it is blocked by the limiting edge. Then, the cylinder is activated, causing the piston rod to move a connecting plate, which in turn moves a contour clamp closer to the engine cylinder until it is clamped and locked. During this process, the connecting plate moves along the inner cavity of the slide groove and moves the protrusion along the inner cavity of the groove, serving as a limiting and guiding function and ensuring stability during movement. The pressure sensor and polyurethane buffer pad provide protection, facilitating clamping and locking of the engine cylinder and preventing deformation of the thin-walled cylinder, thus facilitating engine cylinder inspection.

[0022] 2. In this utility model, the vibration generated during disassembly is transmitted to the rubber-metal composite vibration isolation layer via the base platform. At this time, the rubber-metal composite vibration isolation layer initially buffers and absorbs energy to weaken the vibration impact. The remaining vibration impact is transmitted to the hydraulic damper via the connecting seat. At this time, the hydraulic damper further buffers and absorbs energy to weaken the remaining vibration impact, so as to prevent the vibration impact from causing scratches on the cylinder surface during disassembly. This facilitates the buffering and absorption of vibration impact to prevent scratches on the cylinder surface during disassembly. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0024] Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0025] Figure 2 This is a schematic side view of the overall structure of this utility model.

[0026] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0027] Figure 4 This is a schematic diagram of the bottom assembly structure of the base platform of this utility model.

[0028] Figure 5 This is a schematic diagram of the separation structure of the contour clamp and the polyurethane buffer pad of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] In the diagram: 1. Frame; 101. Fixture; 2. Base platform; 201. Arc plate; 202. Slide groove; 203. Groove; 3. Cylinder; 4. Connecting plate; 401. Protrusion; 5. Contouring clamp; 6. Pressure sensor; 7. Polyurethane buffer pad; 8. Rubber-metal composite vibration isolation layer; 9. Connecting seat; 10. Hydraulic damper; 11. Limiting cylinder; 1101. Relief groove; 1102. Limiting edge; 12. Laser cross positioner; 13. PLC controller. Detailed Implementation

[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0032] Reference Figures 1-5 An engine testing fixture is provided, which includes a frame 1 and a mounting bracket 101 mounted on the top of the frame 1.

[0033] Base platform 2, which is located above rack 1;

[0034] The pneumatic locking mechanism includes four sets of cylinders 3 arranged in a cross shape. The cylinders 3 are installed at the bottom of the base platform 2. A connecting plate 4 is installed on the piston rod of the cylinder 3. The connecting plate 4 is movably installed in the base platform 2, and a contour clamp 5 is installed on the protruding part. A pressure sensor 6 is installed inside the contour clamp 5, and a polyurethane buffer pad 7 is installed on the inner side of the contour clamp 5.

[0035] The vibration damping assembly includes a rubber-metal composite vibration isolation layer 8 installed on the bottom of the base platform 2, a connecting seat 9 installed on the bottom of the rubber-metal composite vibration isolation layer 8, a hydraulic damper 10 installed on the bottom of the connecting seat 9, and the hydraulic damper 10 installed on the frame 1.

[0036] The limiting cylinder 11 is installed on the frame 1 and covers the shock absorption component. The outer surface of the limiting cylinder 11 is movably connected to the base platform 2.

[0037] Reference Figures 2-5 The base platform 2 is provided with a sliding groove 202 corresponding to the connecting plate 4, and the sliding groove 202 is adapted to the connecting plate 4 so as to play a limiting and guiding role, and at the same time ensure stability during movement.

[0038] Reference Figures 2-5The sliding groove 202 has symmetrical grooves 203 on both sides. The connecting plate 4 is equipped with protrusions 401 corresponding to the grooves 203 respectively, and the protrusions 401 are adapted to the grooves 203. The connecting plate 4 is slidably installed on the base platform 2 through the protrusions 401, the sliding groove 202 and the grooves 203, so as to play a limiting and guiding role, and at the same time ensure stability during movement.

[0039] Reference Figures 2-5 The base platform 2 has several integrally formed arc-shaped plates 201 at its bottom. The outer surface of the limiting cylinder 11 has integrally formed limiting edges 1102 that correspond to the arc-shaped plates 201 respectively. During movement, the arc-shaped plates 201 are sleeved on the outer surface of the limiting cylinder 11, and the bottom of the arc-shaped plates 201 is in blocking contact with the top of the limiting edges 1102, so that the arc-shaped plates 201 can move along the outer surface of the limiting cylinder 11.

[0040] Reference Figures 2-5 The top of the limiting cylinder 11 is provided with a relief groove 1101 corresponding to the cylinder 3, and the height of the limiting edge 1102 is higher than the height of the bottom wall of the relief groove 1101, so as to limit the height of the base platform 2 from falling.

[0041] Reference Figure 1 and Figure 2 A detachable laser cross positioner 12 is installed at the bottom of the mounting bracket 101. The laser cross positioner 12 is located above the base platform 2, and the axis of the laser cross positioner 12 is coincident with the axis of the base platform 2 to facilitate auxiliary positioning of the engine cylinder.

[0042] Reference Figure 1 , Figure 2 as well as Figure 4 The frame 1 is equipped with a PLC controller 13 for controlling the cylinder 3, pressure sensor 6 and laser cross positioner 12.

[0043] The working principle of this utility model is as follows: By placing the engine cylinder on the base platform 2, and using the PLC controller 13 to open the laser cross positioner 12 to assist in positioning the engine cylinder, the base platform 2 will descend due to its weight. At the same time, the arc plate 201 will move close to the outer surface of the limiting cylinder 11 until the arc plate 201 is blocked by the limiting edge 1102. Then, the cylinder 3 will be started. At this time, the piston rod of the cylinder 3 will drive the connecting plate 4 to move. The connecting plate 4 will drive the contour clamp 5 to move and move towards the engine cylinder until the contour clamp 5 clamps and locks the engine cylinder. During this period, the connecting plate 4 will move along the inner cavity of the slide groove 202 and drive the protrusion 401 to move along the inner cavity of the groove 203 to play a limiting and guiding role, and at the same time ensure the stability during the movement. The pressure sensor 6 and the polyurethane buffer pad 7 play a protective role, which facilitates the clamping and locking of the engine cylinder and avoids the deformation of the thin-walled cylinder, thus facilitating the detection of the engine cylinder.

[0044] When the engine cylinder is being disassembled, the vibration generated during disassembly is transmitted to the rubber-metal composite vibration isolation layer 8 via the base platform 2. At this time, the rubber-metal composite vibration isolation layer 8 initially buffers and absorbs energy to reduce the vibration impact. The remaining vibration impact is transmitted to the hydraulic damper 10 via the connecting seat 9. At this time, the hydraulic damper 10 further buffers and absorbs energy to reduce the vibration impact, so as to prevent the vibration impact from causing scratches on the cylinder surface during disassembly. This facilitates the buffering and absorption of vibration impact to prevent scratches on the cylinder surface during disassembly.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A mounting device for engine testing, characterized in that: include: A frame (1) is provided with a mounting bracket (101) on its top. A base platform (2) is located above the frame (1); A pneumatic locking mechanism is provided, comprising four sets of cylinders (3) arranged in a cross shape. The cylinders (3) are installed at the bottom of the base platform (2). A connecting plate (4) is installed on the piston rod of the cylinder (3). The connecting plate (4) is movably installed inside the base platform (2), and a contour clamp (5) is installed on the protruding part. A pressure sensor (6) is provided inside the contour clamp (5), and a polyurethane buffer pad (7) is installed on the inner side of the contour clamp (5). The vibration damping assembly includes a rubber-metal composite vibration isolation layer (8) installed on the bottom of the base platform (2), a connecting seat (9) installed on the bottom of the rubber-metal composite vibration isolation layer (8), a hydraulic damper (10) installed on the bottom of the connecting seat (9), and the hydraulic damper (10) installed on the frame (1). A limiting cylinder (11) is installed on the frame (1) and covers the shock absorption assembly. The outer surface of the limiting cylinder (11) is movably connected to the base platform (2).

2. The mounting device for engine testing according to claim 1, characterized in that: The base platform (2) is provided with a sliding groove (202) corresponding to the connecting plate (4), and the sliding groove (202) is adapted to the connecting plate (4).

3. The mounting device for engine testing according to claim 2, characterized in that: The slide groove (202) has grooves (203) symmetrically arranged on both sides. The connecting plate (4) is equipped with protrusions (401) corresponding to the grooves (203) respectively, and the protrusions (401) are adapted to the grooves (203). The connecting plate (4) is slidably installed on the base platform (2) through the protrusions (401), the slide groove (202) and the grooves (203).

4. The mounting device for engine testing according to claim 1, characterized in that: The base platform (2) has several integrally formed arc-shaped plates (201) at its bottom. The outer surface of the limiting cylinder (11) has integrally formed limiting edges (1102) that correspond to the arc-shaped plates (201) respectively. During movement, the arc-shaped plates (201) are sleeved on the outer surface of the limiting cylinder (11), and the bottom of the arc-shaped plates (201) and the top of the limiting edges (1102) make blocking contact.

5. The mounting device for engine testing according to claim 4, characterized in that: The top of the limiting cylinder (11) is provided with a relief groove (1101) corresponding to the cylinder (3), and the height of the limiting edge (1102) is higher than the height of the bottom wall of the relief groove (1101).

6. The mounting device for engine testing according to claim 1, characterized in that: A detachable laser cross positioner (12) is installed at the bottom of the fixed frame (101). The laser cross positioner (12) is located above the base platform (2), and the axis of the laser cross positioner (12) coincides with the axis of the base platform (2).

7. The mounting device for engine testing according to any one of claims 1-6, characterized in that: The frame (1) is equipped with a PLC controller (13) for controlling the cylinder (3), the pressure sensor (6) and the laser cross positioner (12).

Images