Engine clamping device and test bench
By using a clamping device with wedge blocks and connecting rods, and taking advantage of the wedge self-locking principle and the weight of the engine, the problem of interference between the rotating clamping cylinder and the reinforcing rib is solved, achieving stable and reliable engine clamping, and reducing equipment costs and maintenance difficulty.
Patent Information
- Application Number
- CN202520414921.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-10
AI Technical Summary
In the existing technology, the rotary clamping cylinder jaws need to rotate 90° and interfere with the reinforcing ribs on the engine surface, affecting clamping stability and reliability. The hydraulic device is also costly and difficult to maintain.
It adopts a wedge block and connecting rod structure, and uses the wedge self-locking principle and the engine's own weight to clamp, avoiding rotational clamping action. Combined with the cylinder drive mechanism, it reduces equipment cost and maintenance difficulty.
It achieves stability and reliability in the clamping process, avoids interference between the grippers and reinforcing ribs, reduces equipment costs and maintenance requirements, and simplifies the design of the clamping device.
Smart Images
Figure CN223790323U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an engine clamping device and a test bench, belonging to the field of engine testing technology. Background Technology
[0002] During engine assembly, oil circuit leakage tests and cold tests are performed. An engine cold test is a testing method that runs the engine with external power while it is not ignited or burning, to check the engine assembly quality and performance indicators. It can quickly detect potential problems that may occur during the assembly process after assembly but before ignition and operation.
[0003] Currently, during engine cold testing, the flywheel is driven by an electric motor to operate the engine. However, the engine's compact design and the presence of various reinforcing ribs and other irregular features on the casing surface make clamping the engine extremely difficult. If a rotary clamping cylinder is used, the jaws need to rotate 90°, which may cause interference between the jaws and the reinforcing ribs on the engine surface during clamping, affecting the stability and reliability of the clamping. Furthermore, while a dedicated hydraulic clamping device can be used, this method requires additional auxiliary tooling to create auxiliary positioning and clamping surfaces. Hydraulic devices clamp and position the engine by lifting or pressing down, but this method requires an independent hydraulic system, increasing equipment costs and maintenance complexity. Utility Model Content
[0004] This utility model provides an engine clamping device and test bench to solve the problems of the clamping jaws needing to rotate 90° during the clamping process of the rotary clamping cylinder, which interferes with the reinforcing ribs on the engine surface, affecting the stability and reliability of clamping, as well as the high cost and difficult maintenance of hydraulic devices.
[0005] This utility model is achieved through the following technical solution:
[0006] Firstly, this utility model provides an engine clamping device, including...
[0007] The guide block has through holes inside;
[0008] The gripper is rotatably connected to the guide block and can abut against the engine;
[0009] The second wedge block, the guide block is sleeved on the outside of the second wedge block, and the second wedge block can drive the gripper to rotate;
[0010] The first wedge block is perpendicular to the guide block and can abut against the second wedge block.
[0011] In one embodiment of this utility model, one end of the second wedge block is connected to a first connecting rod, and the first connecting rod is located in the through hole of the guide block;
[0012] A second link is connected to one side of the gripper, and the side of the second link opposite to the gripper is rotatably connected to the first link.
[0013] In one embodiment of this utility model, a push rod is provided on one side of the first wedge block, and an elastic body is sleeved on the outer periphery of the push rod, the elastic body abutting against the first wedge block.
[0014] In one embodiment of this utility model, a bracket is included, and the guide block is installed on one side of the bracket.
[0015] In one embodiment of this utility model, a first driving mechanism and a second driving mechanism are further included. The first driving mechanism is connected to the push rod, and the second driving mechanism is connected to the second wedge block.
[0016] In one embodiment of this utility model, a second sensor is provided on the gripper.
[0017] In one embodiment of this utility model, a first sensor is installed on one side of the bracket.
[0018] In one embodiment of this utility model, a second mounting plate is installed on one side of the guide block.
[0019] Secondly, this utility model provides a test bench, including the aforementioned engine clamping device, and further including an engine head base and a positioning block, wherein the positioning block is mounted on the engine head base.
[0020] In one embodiment of this utility model, the clamping device is connected to the machine head base via the second mounting plate.
[0021] Beneficial effects
[0022] The engine clamping device provided by this utility model has a simple structure and does not involve rotational clamping during the clamping process. This effectively avoids interference between the clamping jaws and the reinforcing ribs on the engine surface, ensuring the stability and reliability of the clamping. By pressing with the first and second wedge blocks, the engine can be securely clamped using the wedge self-locking principle and the engine's own weight. No independent hydraulic system is required, reducing equipment cost and maintenance requirements. Attached Figure Description
[0023] Figure 1 A perspective view of the clamping device provided by this utility model in conjunction with the test bench;
[0024] Figure 2A perspective view of the clamping device provided by this utility model;
[0025] Figure 3 A perspective view of the clamping device provided by this utility model in the released state;
[0026] Figure 4 A perspective view of the clamping device provided by this utility model in the clamping state;
[0027] Figure 5 A cross-sectional view of the clamping device provided by this utility model;
[0028] In the diagram: 100, clamping device; 200, test bench;
[0029] 1. First drive mechanism; 2. Push rod; 3. Elastic body; 4. First wedge block; 5. Bracket; 6. Connecting plate; 7. First sensor; 8. Second drive mechanism; 9. Guide block; 10. First mounting plate; 11. Second wedge block; 12. First connecting rod; 13. Second connecting rod; 14. Gripper; 15. Second sensor; 16. Second mounting plate;
[0030] 201. Headstock; 202. Positioning block; 203. Flywheel housing. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0034] like Figures 1 to 5 As shown, this application embodiment provides an engine clamping device 100, which is mounted on a test bench 200 and used to clamp the engine during cold testing. The clamping device 100 includes a first drive mechanism 1, a first wedge block 4, and a bracket 5. The first drive mechanism 1 is mounted on one end of the bracket 5. A push rod 2 is connected to the power output end of the first drive mechanism 1. The end of the push rod 2 facing away from the first drive mechanism 1 is connected to the first wedge block 4. An elastic body 3 is sleeved on the outer periphery of the push rod 2, and both ends of the elastic body 3 abut against the push rod 2 and the first wedge block 4, respectively. A connecting plate 6 is mounted on the side of the bracket 5, and a first sensor 7 is mounted on the connecting plate 6. The first sensor 7 is used to detect the position of the first wedge block 4. The first drive mechanism 1 drives the push rod 2 and the elastic body 3 to make the first wedge block 4 reciprocate.
[0035] In some embodiments, the clamping device 100 further includes a second drive mechanism 8 and a first mounting plate 10. The first mounting plate 10 is mounted on one side of the bracket 5, on the same side as the first sensor 7. The first mounting plate 10 has two pieces, symmetrically distributed on both sides of the first wedge block 4. The second drive mechanism 8 is connected to the bracket 5 through the first mounting plate 10. A guide block 9 is provided on the side of the bracket 5 opposite to the first mounting plate 10. The guide block 9 has a C-shaped structure and a through hole inside. The second wedge block 11 is installed in the through hole of the guide block 9, and one end is connected to the second drive mechanism 8. Under the drive of the second drive mechanism 8, the second wedge block 11 can reciprocate within the through hole of the guide block 9.
[0036] In some embodiments, the side of the second wedge block 11 opposite to the second drive mechanism 8 is connected to a first connecting rod 12. The first connecting rod 12 is installed in the through hole of the guide block 9 and can move linearly along the guide block 9. The side of the first connecting rod 12 opposite to the second wedge block 11 is connected to a second connecting rod 13, and the first connecting rod 12 and the second connecting rod 13 are rotatably connected. The end of the second connecting rod 13 opposite to the first connecting rod 12 is rotatably connected to a gripper 14, and the gripper 14 is rotatably connected to the guide block 9. The second drive mechanism 8 drives the second wedge block 11, and the second wedge block 11 drives the first connecting rod 12 and the second connecting rod 13 to move. The second connecting rod 13 pushes the gripper 14 to rotate, thereby clamping or releasing the engine flywheel housing 203 without rotational repositioning and without interference with the reinforcing ribs on the engine surface, ensuring the stability and reliability of the clamping.
[0037] like Figures 3 to 5 As shown, in some embodiments, a second sensor 15 is also installed on the gripper 14, which can detect the state of the gripper 14. When the gripper 14 presses against the flywheel housing 203, the second sensor 15 receives a signal and transmits the signal to the control system. The control system controls the first drive mechanism 1 to operate. The first drive mechanism 1 pushes out the first wedge block 4 through the push rod 2, so that the first wedge block 4 contacts and squeezes the second wedge block 11 to form a self-locking mechanism. Using the wedge self-locking principle and the weight of the engine itself, the engine is clamped onto the engine head seat 201. After the test is completed, the first drive mechanism 1 pulls the first wedge block 4 back to its initial state through the push rod 2 and the elastic body 3. The second wedge block 11 is unlocked and can move within the guide block 9. Under the pull of the second drive mechanism 8, the second wedge block 11 drives the first connecting rod 12 and the second connecting rod 13 to move, thereby driving the gripper 14 to rotate. The gripper 14 is released, and the engine is released.
[0038] Furthermore, in some embodiments, a second mounting plate 16 is connected to the side of the guide block 9 away from the bracket 5. There are two second mounting plates 16, which are symmetrically installed on both sides of the guide block 9 and are used to connect the clamping device 100 and the test table 200.
[0039] Optionally, both the first drive mechanism 1 and the second drive mechanism 8 are cylinders, which can be directly connected to the air source on the engine test bench without the need for an additional air source, thus reducing costs and maintenance difficulty.
[0040] Optionally, after the engine is clamped, the first drive mechanism 1 and the second drive mechanism 8 can be controlled by using a three-position five-way centrally sealed solenoid valve, so that the clamping device 100 can firmly clamp the engine for a period of time even when the power and air supply are cut off, thus avoiding safety hazards.
[0041] In addition, such as Figure 1 and Figure 2As shown, this utility model also provides a test bench 200, which includes the clamping device 100 described above. The test bench 200 also includes a headstock 201 and positioning blocks 202. The headstock 201 has a circular through hole in the middle for placing the engine. Two positioning blocks 202 are provided on the headstock 201, symmetrically arranged on both sides of the through hole. The flywheel housing 203 of the engine abuts against the positioning blocks 202 and the grippers 14 on both sides, respectively. The flywheel housing 203 is clamped between the positioning blocks 202 and the grippers 14.
[0042] Furthermore, in some embodiments, grooves are provided on both sides of the headstock 201, clamping devices 100 are symmetrically installed on both sides of the headstock 201, guide blocks 9 are installed in the grooves on both sides of the headstock 201 and connected to the headstock 201 through the second mounting plate 16. The two can be connected by bolts for easy installation and disassembly.
[0043] The working principle of this invention is as follows: During the engine cold test, the flywheel housing 203 of the engine abuts against the positioning blocks 202 on both sides. The control system activates the second drive mechanism 8, which drives the second wedge block 11 to move. The second wedge block 11 pushes the first connecting rod 12 and the second connecting rod 13 to move. The second connecting rod 13 drives the gripper 14 to rotate, causing the gripper 14 to clamp the flywheel housing 203. The second sensor 15 detects the clamping signal and transmits it to the control system. The control system then controls the first drive mechanism 1 to move, which in turn drives the push rod 2 to move. The push rod 2 pushes the first wedge block 4 to move until it contacts and presses against the second wedge block 11, forming a self-locking mechanism. The engine is securely clamped using the wedge self-locking principle and the engine's own weight. After the test is completed, the first drive mechanism 1 pulls the first wedge block 4 back to its initial state via the push rod 2 and the elastic body 3, unlocking the second wedge block 11. The second drive mechanism 8 pulls the second wedge block 11 back to its initial state. The second wedge block 11 drives the first connecting rod 12 and the second connecting rod 13 to move, causing the gripper 14 to rotate, releasing the flywheel housing 203 and releasing the engine.
[0044] The clamping device 100 has a simple structure and eliminates the need for rotational clamping during the clamping process, effectively preventing interference between the grippers and the reinforcing ribs on the engine housing surface. The drive mechanism of the clamping device 100 can be connected to the air source provided by the test bench 200. Without using a large cylinder, the engine can be securely clamped using the wedge-shaped self-locking principle and the engine's own weight, effectively reducing the overall cost of the test bench 200. Furthermore, this device does not require a separate hydraulic system for power, reducing equipment costs and maintenance requirements.
[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0046] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.
[0047] This document uses specific embodiments to illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. An engine clamping device, characterized in that, include: Guide block (9) has a through hole inside; The gripper (14) is rotatably connected to the guide block (9) and can abut against the engine; The second wedge block (11) is fitted on the outside of the guide block (9), and the second wedge block (11) can drive the gripper (14) to rotate. The first wedge block (4) is perpendicular to the guide block (9), and the first wedge block (4) can abut against the second wedge block (11).
2. The engine clamping device according to claim 1, characterized in that, One end of the second wedge block (11) is connected to a first connecting rod (12), and the first connecting rod (12) is located in the through hole of the guide block (9); A second link (13) is connected to one side of the gripper (14), and the side of the second link (13) away from the gripper (14) is rotatably connected to the first link (12).
3. The engine clamping device according to claim 2, characterized in that, A push rod (2) is provided on one side of the first wedge block (4), and an elastic body (3) is sleeved on the outer periphery of the push rod (2), and the elastic body (3) abuts against the first wedge block (4).
4. The engine clamping device according to claim 3, characterized in that, Includes a bracket (5), and the guide block (9) is installed on one side of the bracket (5).
5. An engine clamping device according to claim 4, characterized in that, It also includes a first drive mechanism (1) and a second drive mechanism (8), the first drive mechanism (1) being connected to the push rod (2) and the second drive mechanism (8) being connected to the second wedge block (11).
6. An engine clamping device according to claim 2, characterized in that, A second sensor (15) is provided on the gripper (14).
7. An engine clamping device according to claim 4, characterized in that, The first sensor (7) is installed on one side of the bracket (5).
8. An engine clamping device according to claim 4, characterized in that, A second mounting plate (16) is installed on one side of the guide block (9).
9. A test bench, characterized in that, The test bench (200) includes an engine clamping device according to any one of claims 1-8, and further includes an engine head base (201) and a positioning block (202), the positioning block (202) being mounted on the engine head base (201).
10. A test bench according to claim 9, characterized in that, The clamping device (100) is connected to the headstock (201) via the second mounting plate (16).