A dual-power system cylinder head sealing test machine

Abstract

The present invention discloses a dual-power system cylinder head sealing test bench, comprising a test box, a supporting plate for placing the cylinder head is provided above the test box, test mechanisms for testing the air tightness of the cylinder head are symmetrically provided on both sides of the supporting plate, the supporting plate is provided below a clamping mechanism, the test box is provided in a fixed frame, a lifting hydraulic cylinder is provided on the fixed frame for driving the clamping mechanism to rise and fall, and a pick-up and placement mechanism for picking up and placing the cylinder head is provided on one side of the test box. The present invention provides a clamping mechanism, and the clamping hydraulic cylinder on the clamping mechanism cooperates with the clamping cylinder, so that when the clamping plate contacts the surface of the cylinder head, the clamping cylinder with smaller thrust continues to clamp the two ends of the cylinder head, thereby ensuring the sealing of the cylinder head while avoiding damage to the cylinder head surface caused by excessive thrust of the clamping hydraulic cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile accessories, and in particular to a dual-power system cylinder head sealing test machine. Background Art

[0002] The cylinder head is a crucial component in the engine system, sealing the upper portion of the cylinder to form the combustion chamber and supporting the camshaft, rocker shafts, and intake and exhaust pipes. The airtightness of the cylinder head is a key factor affecting product quality.

[0003] At present, various companies mainly use the water inspection method to test the sealing of cylinder heads. That is, first clamp and seal the cylinder head with a clamp, then use a lifting hydraulic cylinder to press the cylinder head and sink the cylinder head into water, and then introduce compressed air into the inner cavity of the cylinder head through the air pipe for testing. However, there are certain problems with the above method. First, the thrust of the piston rod of the lifting hydraulic cylinder is large, so when the lifting hydraulic cylinder pushes the clamping block to contact the surface of the cylinder head, it is easy to cause damage to the surface of the cylinder head; second, when the cylinder head is clamped with a clamp, a positioning cylinder is usually required to position the cylinder head to facilitate the air pipe to pass air into the cylinder head. Therefore, the positioning cylinder needs to be sunk into water with the cylinder head, which has a great impact on the quality and life of the positioning cylinder; at the same time, after the cylinder head is tested, moisture on the cylinder head remains on the cylinder head, which is easy to cause rust on the cylinder head. Summary of the Invention

[0004] The purpose of the present invention is to provide a dual-power system cylinder head sealing test machine to solve the following technical problems: (1) The thrust of the piston rod of the lifting hydraulic cylinder is large, which easily causes damage to the surface of the cylinder head; (2) The positioning cylinder sinks into the water with the cylinder head, which has a great impact on the quality and life of the positioning cylinder.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A dual-power system cylinder head sealing test machine comprises a test box, a supporting plate for placing the cylinder head is provided above the test box, test mechanisms for testing the air tightness of the cylinder head are symmetrically provided on both sides of the supporting plate, the supporting plate is provided below the clamping mechanism, the test box is provided in a fixed frame, a lifting hydraulic cylinder for driving the clamping mechanism to lift and lower is provided on the fixed frame, and a picking and placing mechanism for picking and placing the cylinder head is provided on one side of the test box; the top plate of the clamping mechanism is fixedly installed on the top of the middle plate through a connecting rod, the piston rod of the clamping hydraulic cylinder fixedly installed on the middle plate passes through the middle plate and is fixedly installed on the top of the bottom plate, the piston rods of the clamping cylinder fixedly installed on both sides of the top of the two bottom plates all pass through the bottom plate and are fixedly connected to the two clamping plates, and a plurality of supporting rods fixedly installed on the bottom of the middle plate are all fixedly installed on the supporting plate.

[0007] Furthermore, clamping assemblies are symmetrically arranged on both sides of the fixed plate of the picking and placing mechanism, and two clamping cylinders are fixedly installed on one side of the clamping seat of the clamping assembly. The two clamping cylinder piston rods pass through the clamping seat and are fixedly connected to one side of the clamping plate. Two first limit cylinders are fixedly installed on one side of the fixed plate, and the limit plate is rotatably installed on the fixing hole opened on the side of the fixed plate close to the test box.

[0008] Furthermore, the piston rod of the second limiting cylinder rotatably mounted on the bottom of the fixing plate is rotatably mounted on one side of the limiting plate.

[0009] Furthermore, movable grooves are symmetrically opened on both sides of the fixed plate, a movable screw is rotatably installed in one of the movable grooves, and a sliding rod is fixedly installed in the other movable groove, the clamping seat of one clamping assembly is threadedly connected to the movable screw, and the clamping seat of the other clamping assembly is slidably installed on the sliding rod.

[0010] Furthermore, a moving motor for driving the moving lead screw to rotate is provided on one side of the fixing plate, and the fixing plate is fixedly installed on one side of the test box.

[0011] Furthermore, the lifting hydraulic cylinder is fixedly installed on the fixing frame, and the piston rod of the lifting hydraulic cylinder passes through the top of the fixing frame and is fixedly connected to the top of the top plate.

[0012] Furthermore, an air pipe is fixedly installed on the end of the piston rod of the test cylinder on the testing mechanism, an air inlet is opened on the top of the air pipe, and an exhaust port connected to the air hole of the cylinder cover is opened on one side of the air pipe. The test cylinder is fixedly installed on the side wall of the supporting plate.

[0013] Furthermore, a drying mechanism is provided on the fixed plate of the pick-and-place mechanism, and two drying motors are fixedly installed on the top of the connecting frame of the drying mechanism, and the output shafts of the two drying motors both pass through the connecting frame and are fixedly connected to the fan.

[0014] Beneficial effects of the present invention:

[0015] The dual-power system cylinder head sealing tester of the present invention is provided with a clamping mechanism. The clamping hydraulic cylinder on the clamping mechanism cooperates with the clamping cylinder. When the clamping plate contacts the cylinder head surface, the clamping cylinder with smaller thrust force continues to clamp the two ends of the cylinder head. This ensures the sealing of the cylinder head while avoiding damage to the cylinder head surface caused by excessive thrust of the clamping hydraulic cylinder.

[0016] By setting a pick-and-place mechanism, two clamping assemblies provided on the pick-and-place mechanism cooperate with the limit plate and two limit cylinders, so that the cylinder head can be centrally placed on the fixed plate. The positioned cylinder head is conveniently aligned with the air pipes of the test mechanism on both sides of the load-bearing plate, which facilitates the test of the sealing performance of the cylinder head. The positioning cylinder does not need to be submerged in water with the cylinder head, which affects the service life of the positioning cylinder. At the same time, the two movable clamping assemblies facilitate the taking and placing of the cylinder head, reducing the labor intensity of personnel and improving the degree of automation.

[0017] The drying mechanism on the fixing plate is used to remove moisture from the cylinder head to prevent the moisture adhering to the cylinder head from causing rust on the cylinder head. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a structural schematic diagram of a dual-power system cylinder head sealing test machine of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the pressing mechanism of the present invention;

[0021] Figure 3 It is a structural diagram of the testing mechanism of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the pick-and-place mechanism of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the drying mechanism of the present invention.

[0024] In the figure: 1. test box; 2. fixed frame; 3. lifting hydraulic cylinder; 4. drying mechanism; 41. connecting frame; 42. drying motor; 43. fan; 5. pressing mechanism; 51. top plate; 52. pressing hydraulic cylinder; 53. middle plate; 54. bottom plate; 55. pressing plate; 56. pressing cylinder; 6. pick-and-place mechanism; 61. fixed plate; 62. moving groove; 63. moving screw; 64. sliding rod; 65. clamping assembly; 651. clamping seat; 652. clamping cylinder; 653. clamping plate; 66. fixing hole; 67. first limit cylinder; 68. moving motor; 69. limit plate; 7. load-bearing plate; 8. testing mechanism; 81. testing cylinder; 82. air pipe; 83. air inlet; 84. exhaust port. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 5 As shown, the present invention is a dual-power system cylinder head sealing test machine, including a test box 1, in which water for testing the cylinder head sealing is stored. A supporting plate 7 for placing the cylinder head is provided above the test box 1. Testing mechanisms 8 for testing the air tightness of the cylinder head are symmetrically provided on both sides of the supporting plate 7. The supporting plate 7 is provided below a clamping mechanism 5. The test box 1 is provided in a fixing frame 2. The fixing frame 2 is provided with a lifting hydraulic cylinder 3 for driving the clamping mechanism 5 to rise and fall.

[0027] See Figure 2 The pressing mechanism 5 includes a top plate 51, which is fixedly mounted on the top of the middle plate 53 through a connecting rod. A pressing hydraulic cylinder 52 is fixedly mounted on the middle plate 53. The piston rod of the pressing hydraulic cylinder 52 passes through the middle plate 53 and is fixedly mounted on the top of the bottom plate 54. Pressing plates 55 are symmetrically arranged on both sides of the bottom of the bottom plate 54. Pressing cylinders 56 are fixedly mounted on both sides of the top of the two bottom plates 54. The piston rods of the two pressing cylinders 56 pass through the bottom plate 54 and are fixedly connected to the two pressing plates 55. A number of bearing rods are fixedly mounted on the bottom of the middle plate 53. The bearing rods are all fixedly mounted on the bearing plate 7. The bearing plate 7 is a U-shaped component.

[0028] When the cylinder head is pressed: start the pressing hydraulic cylinder 52, the piston rod of the pressing hydraulic cylinder 52 drives the bottom plate 54 to move downward, and then drives the two pressing plates 55 to move downward and contact the surface of the cylinder head, and preliminarily presses the cylinder head, start the two pressing cylinders 56, and the piston rods of the two pressing cylinders 56 continue to drive the two pressing plates 55 to press the two sides of the cylinder head onto the supporting plate 7, and further press the cylinder head. The cylinder head is pressed in two sections to ensure the sealing of the cylinder head while avoiding damage to the cylinder head surface due to excessive thrust of the pressing hydraulic cylinder 52.

[0029] See Figure 3 The testing mechanism 8 includes a testing cylinder 81, which is fixedly mounted on the side wall of the supporting plate 7. An air pipe 82 is fixedly mounted on the end of the piston rod of the testing cylinder 81. An air inlet 83 is provided on the top of the air pipe 82. The air inlet 83 is connected to the air pump through an air pipe. An exhaust port 84 is provided on the side of the air pipe 82 away from the testing cylinder 81. The exhaust port 84 is connected to the air hole of the cylinder head. The air pump supplies air to the air pipe 82 through the air pipe and delivers the gas to the cylinder head to test the air tightness of the cylinder head.

[0030] The lifting hydraulic cylinder 3 is fixedly mounted on the fixing frame 2 , and the piston rod of the lifting hydraulic cylinder 3 passes through the top of the fixing frame 2 and is fixedly connected to the top of the top plate 51 .

[0031] A pick-up and placement mechanism 6 for taking and placing the cylinder cover is provided on one side of the test box 1, and a drying mechanism 4 is provided on a fixing plate 61 of the pick-up and placement mechanism 6;

[0032] See Figure 4 The pick-and-place mechanism 6 includes a fixed plate 61, which is fixedly installed on one side of the test box 1. Moving grooves 62 are symmetrically opened on both sides of the fixed plate 61. A moving screw 63 is rotatably installed in one of the moving grooves 62, and a sliding rod 64 is fixedly installed in the other moving groove 62. A moving motor 68 is fixedly installed on one side of the fixed plate 61, and the output shaft of the moving motor 68 is fixedly connected to the end of the moving screw 63. Clamping assemblies 65 are symmetrically arranged on both sides of the fixed plate 61. The clamping assembly 65 includes a clamping seat 651. Two clamping cylinders 652 are fixedly installed on one side of the clamping seat 651. The piston rods of the two clamping cylinders 652 pass through the clamping seat 6 51 and is fixedly connected to one side of the clamping plate 653, wherein the clamping seat 651 of one clamping assembly 65 is threadedly connected to the moving screw 63, and the clamping seat 651 of the other clamping assembly 65 is slidably installed on the sliding rod 64, and two first limit cylinders 67 are fixedly installed on one side of the fixed plate 61, and a fixing hole 66 is opened on the side of the fixed plate 61 close to the test box 1, and a limit plate 69 is rotatably installed on the fixing hole 66, and a second limit cylinder is rotatably installed on the bottom of the fixed plate 61, and the piston rod of the second limit cylinder is rotatably installed on one side of the limit plate 69. The rotatable limit plate 69 avoids interference with the moving cylinder head and affects the taking and placing of the cylinder head;

[0033] When positioning the cylinder head: start the second limit cylinder, the second limit cylinder drives the limit plate 69 to rotate, so that the limit plate 69 is vertically set on the fixed plate 61, and the two first limit cylinders 67 are started synchronously. The piston rods of the two first limit cylinders 67 cooperate with the limit plate 69 to correct the two sides of the cylinder head on the fixed plate 61, and at the same time start the two clamping cylinders 652 of the two clamping assemblies 65, and the piston rods of the two clamping cylinders 652 drive the clamping plates 653 to move, and the two clamping plates 653 correct the two sides of the cylinder head and clamp the cylinder head. The limitation in four directions allows the cylinder head to be centered on the fixed plate 61. The positioned cylinder head is convenient for alignment with the air pipes 82 of the test mechanism 8 on both sides of the support plate 7, which facilitates the test of the sealing of the cylinder head. At the same time, the two movable clamping assemblies 65 facilitate the taking and placing of the cylinder head, reduce the labor intensity of personnel, and improve the degree of automation.

[0034] See Figure 5The drying mechanism 4 includes a connecting frame 41, and two drying motors 42 are fixedly installed on the top of the connecting frame 41. The output shafts of the two drying motors 42 pass through the connecting frame 41 and are fixedly connected to the fan 43. The connecting frame 41 is fixedly installed on the fixed plate 61. The drying mechanism 4 is used to remove moisture from the cylinder head to prevent the moisture adhering to the cylinder head from causing rust on the cylinder head.

[0035] See also Figure 1-Figure 5 As shown, the working process of a dual-power system cylinder head sealing test machine of this embodiment is as follows:

[0036] Step 1: Place the cylinder head on the fixed plate 61, start the second limiting cylinder, and the second limiting cylinder drives the limiting plate 69 to rotate, so that the limiting plate 69 is vertically set on the fixed plate 61. Synchronously start the two first limiting cylinders 67. The piston rods of the two first limiting cylinders 67 cooperate with the limiting plates 69 to align the two sides of the cylinder head on the fixed plate 61. At the same time, start the two clamping cylinders 652 of the two clamping assemblies 65. The piston rods of the two clamping cylinders 652 drive the clamping plates 653 to move. The two clamping plates 653 align the two sides of the cylinder head and clamp the cylinder head. The limiting in four directions allows the cylinder head to be centered on the fixed plate 61.

[0037] Step 2: Start the second limit cylinder again, which drives the limit plate 69 to rotate so that the limit plate 69 is parallel to the fixed plate 61 to avoid affecting the movement of the cylinder cover. At this time, start the moving motor 68. The output shaft of the moving motor 68 drives the moving screw 63 to rotate. The rotation of the moving screw 63 drives the clamping seat 651 to move, and then cooperates with the other clamping seat 651 to drive the cylinder cover between the two clamping plates 653 to move.

[0038] Step 3: When the cylinder head moves to the designated position on the carrier plate 7, the pressing hydraulic cylinder 52 is started. The piston rod of the pressing hydraulic cylinder 52 drives the bottom plate 54 to move downward, thereby driving the two pressing plates 55 to move downward and contact the surface of the cylinder head to perform preliminary pressing on the cylinder head. The two pressing cylinders 56 are started. The piston rods of the two pressing cylinders 56 continue to drive the two pressing plates 55 to press both sides of the cylinder head onto the carrier plate 7, further pressing the cylinder head to ensure the airtightness of the bottom of the cylinder head.

[0039] Step 4: Start the test cylinder 81. The piston rod of the test cylinder 81 drives the air pipe 82 to move, so that the exhaust port 84 at the end of the air pipe 82 is connected with the air holes on both sides of the cylinder head. Start the lifting hydraulic cylinder 3. The piston rod of the lifting hydraulic cylinder 3 drives the top plate 51 to move downward, thereby driving the cylinder head on the supporting plate 7 to be immersed in the water of the test box 1. The air pipe 82 is ventilated to test the air tightness of the cylinder head.

[0040] Step 5: After the cylinder head air tightness test is completed, the lifting hydraulic cylinder 3 drives the cylinder head on the supporting plate 7 to move upward through the top plate 51, and the two clamping plates 653 clamp and fix the cylinder head and then move it back to the fixing plate 61. The two drying motors 42 drive the fans 43 to rotate, and the two fans 43 remove moisture from the cylinder head to prevent the moisture adhering to the cylinder head from causing rust on the cylinder head.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A dual-power system cylinder head sealing test bench, comprising a test box (1), a supporting plate (7) for placing the cylinder head is provided above the test box (1), and is characterized in that: Test mechanisms (8) for testing the air tightness of the cylinder cover are symmetrically arranged on both sides of the bearing plate (7), the bearing plate (7) is arranged below the clamping mechanism (5), the test box (1) is arranged in the fixing frame (2), the fixing frame (2) is provided with a lifting hydraulic cylinder (3) for driving the clamping mechanism (5) to lift and lower, and a pick-up and drop mechanism (6) for picking up and dropping the cylinder cover is provided on one side of the test box (1); the top plate (51) of the clamping mechanism (5) is fixedly mounted on the top of the middle plate (53) through a connecting rod, the piston rod of the clamping hydraulic cylinder (52) fixedly mounted on the middle plate (53) passes through the middle plate (53) and is fixedly mounted on the top of the bottom plate (54), the piston rods of the clamping cylinders (56) fixedly mounted on both sides of the top of the bottom plate (54) all pass through the bottom plate (54) and are fixedly connected to the two clamping plates (55), and the multiple bearing rods fixedly mounted on the bottom of the middle plate (53) are all fixedly mounted on the bearing plate (7); Clamping assemblies (65) are symmetrically arranged on both sides of the fixing plate (61) of the pick-and-place mechanism (6), two clamping cylinders (652) are fixedly installed on one side of the clamping seat (651) of the clamping assembly (65), and the piston rods of the two clamping cylinders (652) pass through the clamping seat (651) and are fixedly connected to one side of the clamping plate (653), two first limiting cylinders (67) are fixedly installed on one side of the fixing plate (61), and a limiting plate (69) is rotatably installed on a fixing hole (66) opened on one side of the fixing plate (61) close to the test box (1); The piston rod of the second limiting cylinder rotatably mounted on the bottom of the fixed plate (61) is rotatably mounted on one side of the limiting plate (69); The fixed plate (61) has movable grooves (62) symmetrically formed on both sides, wherein a movable lead screw (63) is rotatably mounted in one of the movable grooves (62), and a sliding rod (64) is fixedly mounted in the other movable groove (62), wherein a clamping seat (651) of one clamping assembly (65) is threadedly connected to the movable lead screw (63), and a clamping seat (651) of the other clamping assembly (65) is slidably mounted on the sliding rod (64); A moving motor (68) for driving the moving lead screw (63) to rotate is provided on one side of the fixed plate (61), and the fixed plate (61) is fixedly mounted on one side of the test box (1).

2. The dual-power system cylinder head sealing test machine according to claim 1, characterized in that: The lifting hydraulic cylinder (3) is fixedly mounted on the fixing frame (2), and the piston rod of the lifting hydraulic cylinder (3) passes through the top of the fixing frame (2) and is fixedly connected to the top of the top plate (51).

3. The dual power system cylinder head sealing test machine according to claim 1, characterized in that: An air pipe (82) is fixedly mounted on the piston rod end of the test cylinder (81) on the test mechanism (8), an air inlet (83) is provided on the top of the air pipe (82), and an exhaust port (84) connected to the air hole of the cylinder cover is provided on one side of the air pipe (82). The test cylinder (81) is fixedly mounted on the side wall of the bearing plate (7).

4. The dual power system cylinder head sealing test machine according to claim 1, characterized in that: A drying mechanism (4) is provided on the fixed plate (61) of the pick-and-place mechanism (6), and two drying motors (42) are fixedly mounted on the top of the connecting frame (41) of the drying mechanism (4), and the output shafts of the two drying motors (42) both pass through the connecting frame (41) and are fixedly connected to the fan (43).

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