Deflection mechanism for engine exhaust plugging

Abstract

The utility model provides a displacement mechanism for engine exhaust plugging, which comprises a connecting plate, two T-shaped pieces and a pair of guide pins, the connecting plate can be driven by a cylinder to move vertically, the guide pins are arranged on two opposite side surfaces of a plugging head, the plugging head is fixed on the connecting plate through a connecting shaft of a joint bearing, and the connecting shaft is horizontally arranged; vertical groove bodies are respectively arranged on the end surfaces of the plugging heads at the upper part and the lower part of the joint head of the joint bearing; the rod body of each T-shaped piece is positioned in the positioning hole in the connecting plate; the head of each T-shaped piece is provided with a semi-cylindrical surface, and the cambered surface of each T-shaped piece abuts against the corresponding groove body; the two T-shaped pieces are located on the upper side and the lower side of the knuckle bearing respectively, and the head portions of the two T-shaped pieces are in a straight line. The shaft of the semi-cylindrical surface forms a rotating shaft relative to which the plugging head rotates; the guide pin is perpendicular to the rotating shaft; the device further comprises a pair of force application parts capable of acting on the two guide pins, and when the plugging head is driven by the air cylinder to move up and down, the pair of guide pins form a pair of torsion arms driving the plugging head to rotate along a set rotating shaft under the action of the force application parts.

Description

Technical Field

[0001] The utility model relates to a displacement mechanism for engine exhaust plugging, which can be used for an automatic test plugging mechanism of an exhaust port in an engine cold test bench, and is particularly suitable for the situation where two engines have inconsistent exhaust port positions and angular positions. Background Art

[0002] The exhaust ports in the engine cold test system are mostly automatic plugging test mechanisms. The purpose of plugging is to detect exhaust pressure and exhaust silencing. The existing single exhaust plugging mechanism can only plug the same engine with the same exhaust port. This structure is difficult to meet the market's demand for compatible testing of two models with different exhaust port positions and angles. Utility Model Content

[0003] The utility model aims to solve the problem that the existing single engine exhaust plugging mechanism cannot be compatible with the plugging of two exhaust ports with different positions and angles, and the stringent demand for a small exhaust plugging space, and provides an exhaust plugging displacement mechanism that can be used to be compatible with two engines with inconsistent exhaust port positions and angles.

[0004] The technical problem to be solved can be implemented through the following technical solutions.

[0005] A displacement mechanism for engine exhaust plugging, characterized by comprising:

[0006] A connecting plate that can be vertically displaced by a displacement cylinder, a plugging head fixed to the connecting plate via a joint bearing and a connecting shaft, the connecting shaft being arranged horizontally; a vertically oriented groove is respectively provided on the end faces of the plugging head at the upper and lower parts of the joint head of the joint bearing; and

[0007] Two T-shaped components, the rod body of each T-shaped component is positioned in the corresponding positioning hole opened on the connecting plate; the head of each T-shaped component has a semi-cylindrical surface, and the arc surface of the semi-cylindrical surface abuts against one of the groove bodies; the two T-shaped components are located on the upper and lower sides of the spherical bearing, and the heads of the two T-shaped components are in a straight line; the axis where the semi-cylindrical surface is located forms the rotation axis of the plugging head relative to it; and

[0008] A pair of guide pins protruding and symmetrically arranged on the opposite side surfaces of the plugging head, wherein the guide pins are perpendicular to the rotation axis; and also comprising a pair of force-applying components that can act on the two guide pins respectively, and when the plugging head is moved up and down with the connecting plate by being driven by the displacement cylinder, the two guide pins are acted upon by the force-applying components to form a pair of torsion arms that drive the plugging head to rotate along a predetermined rotation axis.

[0009] Preferably, the joint head of the spherical bearing falls on the straight line.

[0010] Furthermore, the movement direction of the connecting plate is neither parallel to nor overlaps with the straight line.

[0011] Preferably, a spring is respectively sleeved on the rod bodies of the two T-shaped components, one end of the spring abuts against the head of the T-shaped component, and the other end abuts against the connecting plate.

[0012] Preferably, the groove body is a semi-cylindrical groove.

[0013] Furthermore, a floating joint is provided at the front end of the telescopic rod of the displacement cylinder, and the floating joint is embedded in a slot provided at the upper portion of the connecting plate.

[0014] Furthermore, the connecting plate is positioned on a vertical linear guide slider.

[0015] Preferably, the pair of force-applying components is a pair of inclined blocks, which are respectively arranged at adjacent ends of the corresponding guide pins, and each inclined block has an inclined surface that can be used as a force-applying surface.

[0016] Preferably, the pair of force-applying components are respectively flexibly connected and positioned on the connecting plate via connecting springs.

[0017] Furthermore, it also includes a driving cylinder that directly or indirectly drives the plugging head toward the engine exhaust port, and the moving direction of the driving cylinder is consistent with or parallel to the direction of the connecting shaft of the spherical bearing.

[0018] The displacement mechanism for engine exhaust plugging using the above technical solution has the following advantages and

[0019] Beneficial effects:

[0020] 1. This plugging device is suitable for equipment with narrow space and need to plug multiple engine exhaust ports.

[0021] 2. This plugging device can be installed on various engine exhaust plugging test mechanisms and has a wide range of applications.

[0022] 3. This plugging device has a simple structure, does not take up space, has good stability, is easy to install and maintain, and has a low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of superimposed difference points on the device under test;

[0024] Figure 2 This is a schematic diagram of the working of the displacement blocking mechanism of the A model engine;

[0025] Figure 3 This is a schematic diagram of the working of the displacement blocking mechanism of the B model engine;

[0026] Figure 4 for Figure 2 and Figure 3 A schematic diagram of the exhaust plugging displacement mechanism structure;

[0027] Figure 5 for Figure 4 A partial cross-sectional view of the exhaust plugging displacement mechanism;

[0028] Figure 6 for Figure 5 A partial enlarged view of

[0029] Figure 7 for Figure 4 A schematic diagram of the partial structure of the exhaust plugging displacement mechanism from another angle;

[0030] In the figure; 1. Cylinder; 2. Displacement cylinder; 3. Cylinder bracket; 4. Floating joint; 5. Connecting plate; 6. Spring;

[0031] 7. Inclined block; 71. Inclined plane;

[0032] 8. Guide pin; 9. Sealing head; 10. Sealing pad; 11. Pressing ring;

[0033] 12. T-shaped member; 121. rod body; 122. head;

[0034] 13. Anti-rotation block; 14. Spring;

[0035] 15. Inclined block; 151. Inclined plane;

[0036] 16. Connecting block;

[0037] 17. Connecting plate; 171. Card slot;

[0038] 18. Linear guide slider; 19. Mounting plate; 20. Connecting plate; 22. Connecting shaft; 23. Spherical bearing;

[0039] 101. Model A engine; 102. Model B engine; 103. Engine tray; 104. Exhaust plugging displacement mechanism. DETAILED DESCRIPTION

[0040] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0041] Reference Figures 1 to 3 , illustrates the working of the exhaust plugging displacement mechanism 104 of the present invention when the A-type engine 101 and the B-type engine 102 are respectively arranged on the engine tray 103.

[0042] Reference Figures 4 to 7, is a schematic diagram of the structure of the displacement mechanism for engine exhaust plugging of the present invention. The specific structure is as follows.

[0043] The cylinder 1 with a guide rod is the overall driving mechanism of the mechanism, which is fixed at the corresponding position through the connecting plate 20 at the bottom. The front end of the cylinder acts on the mounting plate 19, and a cylinder bracket 3 is provided on the mounting plate 19. The displacement cylinder 2 is positioned on the cylinder bracket 3. The front end of the telescopic rod of the displacement cylinder 2 is provided with a floating joint 4, and the floating joint 4 is embedded in the slot 171 provided on the upper part of the connecting plate 17. The displacement cylinder 2 can push the connecting plate 17 to move along the vertical linear guide slider 18, and the linear guide slider 18 is positioned on the mounting plate 19.

[0044] The middle part of the plugging head 9 is fixed to the connecting plate 17 via a joint bearing 23 and its connecting shaft 22 (the connecting shaft 22 can be directly understood as the shaft of the joint bearing 23). The two T-shaped parts 12 are connected and positioned in the two positioning holes of the connecting plate 17 via their rod bodies 121. After positioning, the two T-shaped parts 12 are arranged correspondingly up and down, and the heads 122 of the two are semi-cylindrical and correspond to each other in a straight line up and down. A vertical semi-cylindrical groove is respectively provided on the upper and lower end faces of the plugging head 9 of the joint head of the joint bearing 23, and the semi-cylindrical heads 122 of the two T-shaped parts 12 are respectively abutted against the semi-cylindrical groove, so that the heads 122 of the two T-shaped parts jointly form a rotating shaft for the plugging head 9 to rotate relative to it; accordingly, the two T-shaped parts 12 and their corresponding semi-cylindrical grooves are located on the upper and lower sides of the joint bearing 23 relative to the joint bearing 23 and its connecting shaft 22 and are symmetrically arranged.

[0045] Since the middle part of the plugging head 9 is connected to the connecting plate 17 via the joint bearing 23, in order to prevent or avoid hard collision when the docking interface / blocking port on the other side of the plugging head 9 is docked, a spring 14 is sleeved on the rod body 121 of the T-shaped component, so that when the connecting plate 17 is pushed by the cylinder 1 and drives the plugging head 9 to dock, the spring 14 can resolve a part of the hard collision and maintain flexible contact. When the spring 14 is pressed, the depth of the rod body 121 entering the corresponding positioning hole on the connecting plate 17 will change relative to when the spring 14 is released. In addition, since the possible inclination of the docking surface must be considered during docking, the open structure of the semi-cylindrical groove opened on the surface of the plugging head 9 can just meet the semi-cylindrical head 122 of the T-shaped component 12 and the groove body to maintain moderate contact without being completely limited and stuck. The upper and lower springs 14 can also achieve moderate support for the upper and lower parts of the plugging head 9 through the different tensioning forces generated under pressure. At this time, the rotating shaft can also be understood as a limit pin or an anti-rotation pin. Figure 4As shown, in the present embodiment, a single semi-cylindrical groove can be opened on one of the anti-rotation blocks 13 positioned or embedded on the plugging head 9, so that different materials can be selected for the anti-rotation block 13 and the plugging head body according to needs. For example, when the groove body is worn, only the anti-rotation block 13 can be replaced without replacing the plugging head 9; correspondingly, a sealing gasket 10 and a pressure ring 11 are also provided on the sealing side of the plugging head 9 to enhance the sealing performance during docking.

[0046] The joint head of the spherical bearing 23 falls exactly on the axis of the rotating shaft formed by the two semi-cylindrical heads.

[0047] The plugging head 9 is also provided with two protruding guide pins 8, which are located at opposite sides of the plugging head and are perpendicular to the rotation axis. In this embodiment, the rods of the two guide pins 8 are on the same axis. Correspondingly, two inclined blocks 7 and 15 corresponding to the two guide pins 8 are provided on both sides of the plugging head 9, each of which has an inclined surface that can act on the corresponding guide pin 8, wherein the inclined surface 151 of the inclined block 15 of the two inclined surfaces is located at the lower part of one guide pin 8, and the inclined surface 71 of the inclined block 7 is located at the upper part of the other guide pin 8; that is, under the drive of the displacement cylinder 2, the guide pin 8 and the plugging head 9 follow, and the two guide pins subjected to the force of the corresponding inclined surfaces form a pair of torsion arms that drive the plugging head to twist.

[0048] In this embodiment, both inclined blocks are in a stepped structure. The top surface of the stepped structure of inclined block 15 is smaller than the bottom surface, while the top surface of the stepped structure of inclined block 7 is larger than the bottom surface, and the two inclined surfaces 151 and 71 are not parallel (Note: Figure 4 Due to the perspective, the inclined surface 71 of the inclined block 7 does not look like it is on the upper part of the corresponding guide pin 8, but is actually on the upper part, which is specially explained here. The inclined blocks 7 and 15 are respectively connected to the mounting plate 19 via two flexible springs (spring 6 in the figure), so that the effect of the inclined surface on the guide pin can be softer; in this embodiment, the spring 6 connected to the inclined block 15 is positioned on the connecting plate 17 via the connecting block 16, and the spring 6 connected to the inclined block 7 is positioned on the connecting plate 17 via the connecting plate 5.

[0049] Reference Figure 7 The movement direction D of the connecting plate 17 and the anti-rotation pin axis E (i.e., the axis of the aforementioned rotating shaft) formed by the head of the T-shaped component 12 have an angle C° (the C° here is to express that the two are neither overlapping nor parallel, and does not represent the actual angle size, which can be designed according to actual needs), and the inner side surfaces of the inclined block 7 and the inclined block 15 are parallel to the axis E, so that the connecting plate 17 can avoid it when moving.

[0050] The exhaust plugging displacement mechanism of the utility model firstly shifts its position when working. The displacement is achieved by controlling the displacement cylinder 2 to move forward or backward, driving the floating joint 4 and the connecting plate 17 connected thereto to achieve position movement, thereby achieving position movement of the plugging head 9. At the same time, the freedom of the joint bearing 13 is utilized during the movement, and the anti-blocking head 9 is constrained to rotate axially along the connecting shaft 22 through two T-shaped components 12, anti-rotation blocks 13 and two springs 14. The two guide pins 8 are respectively slid on the inclined surfaces of the inclined blocks 7 and 15 to drive the angle adjustment of the plugging head 9. Figure 7 As shown by adjusting the size of the C angle, and Figure 4 The inclination angles of the inclined blocks 7 and 15 shown can meet the blocking requirements at various angles.

[0051] After the exhaust plugging displacement mechanism is displaced, Figure 4 As shown, the cylinder 1 with the guide rod moves forward, so that the exhaust plugging displacement mechanism can achieve the purpose of plugging the engine exhaust port. At this time, the spring 6 and the spring 14 can ensure that the plugging head 9 has a certain angle floating function during plugging, thereby ensuring the sealing performance of the sealing gasket 10 and the engine exhaust port.

Claims

1. A displacement mechanism for engine exhaust blocking, characterized in that: include: A connecting plate that can be vertically displaced by a displacement cylinder, a plugging head fixed to the connecting plate via a joint bearing and a connecting shaft, the connecting shaft being arranged horizontally; a vertically oriented groove is respectively provided on the end surface of the plugging head at the upper and lower parts of the joint head of the joint bearing; and Two T-shaped components, the rod of each T-shaped component is positioned in a corresponding positioning hole provided in the connecting plate; the head of each T-shaped component has a semi-cylindrical surface, the arc surface of which abuts against one of the grooves; the two T-shaped components are located on the upper and lower sides of the spherical bearing, and the heads of the two T-shaped components are aligned; the axis on which the semi-cylindrical surface is located forms a rotation axis relative to which the plugging head rotates; as well as A pair of guide pins protruding and symmetrically arranged on the opposite side surfaces of the sealing head, wherein the guide pins are perpendicular to the rotation axis; and a pair of force-applying components that can act on the two guide pins respectively. When the sealing head is moved up and down with the connecting plate by the displacement cylinder, the two guide pins are acted upon by the force-applying components to form a pair of torsion arms that drive the sealing head to rotate along the predetermined rotation axis.

2. The displacement mechanism for sealing engine exhaust according to claim 1, characterized in that: The joint head of the spherical plain bearing falls on the straight line.

3. The displacement mechanism for sealing engine exhaust according to claim 1, characterized in that: The movement direction of the connecting plate is neither parallel to nor overlaps with the straight line.

4. The displacement mechanism for sealing engine exhaust according to claim 1, characterized in that: A spring is sleeved on the rod bodies of the two T-shaped components respectively, one end of the spring abuts against the head of the T-shaped component, and the other end abuts against the connecting plate.

5. The displacement mechanism for sealing engine exhaust according to claim 1, characterized in that: The trough body is a semi-cylindrical trough.

6. The displacement mechanism for sealing engine exhaust according to claim 1, characterized in that: A floating joint is provided at the front end of the telescopic rod of the displacement cylinder, and the floating joint is embedded in a slot provided on the upper portion of the connecting plate.

7. The displacement mechanism for sealing engine exhaust according to claim 1, characterized in that: The connecting plate is positioned on a vertical linear guide slider.

8. The displacement mechanism for sealing engine exhaust according to claim 1, characterized in that: The pair of force-applying components are a pair of inclined blocks, which are respectively arranged at adjacent ends of the corresponding guide pins, and each inclined block has an inclined surface that can be used as a force-applying surface.

9. The displacement mechanism for sealing engine exhaust according to claim 1 or 8, characterized in that: The pair of force applying components are respectively flexibly connected and positioned on the connecting plate via connecting springs.

10. The displacement mechanism for sealing engine exhaust according to claim 1, characterized in that: It also includes a driving cylinder that directly or indirectly drives the plugging head toward the engine exhaust port, and the moving direction of the driving cylinder is consistent with or parallel to the direction of the connecting shaft of the spherical bearing.

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