Connector of external engine speed governor

Abstract

The utility model discloses a connector of an external engine speed limiter, belongs to the technical field of installation of engine speed limiters, and solves the problem that an existing speed limiter is inconvenient to connect with a crankshaft. The connecting device comprises a connecting sleeve and a connecting shaft, one end of the connecting sleeve is provided with a crankshaft end flange capable of being connected with a crankshaft flange, one end of the connecting shaft is provided with a speed governor end flange capable of being connected with a rotating shaft flange of an engine speed governor, and an inserting groove is formed in the connecting sleeve. The other end of the connecting shaft is inserted into the inserting groove in a sliding mode from the other end of the connecting sleeve, at least two limiting grooves extending in the axial direction of the connecting sleeve are formed in the position, corresponding to the inner wall of the inserting groove, of the connecting sleeve in an inwards-concave mode, and limiting blocks with the number consistent with that of the limiting grooves are arranged on the outer wall of the other end of the connecting shaft in a protruding mode. The limiting blocks are slidably inserted into the limiting grooves in a one-to-one correspondence mode. According to the connector, the connection reliability between the engine speed governor and the crankshaft can be improved, and the service life of the engine speed governor and the crankshaft can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of engine speed limiter installation, and more particularly to a connector for an external engine speed limiter. Background Art

[0002] A speed governor is a device used to limit the speed of machinery or vehicles, ensuring they operate within a safe range to prevent accidents or damage caused by exceeding the set speed limit. It is commonly used in machinery such as automotive engines and electric motors. Engine speed governors can be either external or internal. External engine speed governors are primarily installed outside the engine. Patent publication number CN 206221081 U discloses an engine speed governor and vehicle.

[0003] In existing external engine speed limiters, when in use, the rotating shaft is directly or indirectly connected to the engine's output shaft, and the oil supply passage is connected to the engine's oil supply line. When the engine is running at high speed, the engine's output shaft drives the rotating shaft to rotate. The tension-generating element also rotates with the rotation of the rotating shaft, generating tension, which drives the piston in the oil-limiting passage. The piston then blocks part of the oil supply passage, reducing the oil flow area of the oil supply passage. Consequently, the amount of oil supplied to the engine in the oil supply line decreases, thereby reducing the engine's operating speed.

[0004] In actual use, existing external engine speed limiters are generally connected to the engine's output shaft (crankshaft) via a flange. Although this connection can be achieved, since the external engine speed limiter is installed on the outside of the engine, it is often easy to cause the rotating shaft flange of the engine speed limiter and the crankshaft flange to not align and become unable to be installed due to installation errors or errors in its own production and processing. Or there is a gap between the two. Forcibly tightening the two flanges with bolts can easily cause the bolts to loosen or break.

[0005] Therefore, it is necessary to design a new type of external engine speed limiter connector to solve the above-mentioned technical problems. Utility Model Content

[0006] The technical problem to be solved by the present invention is to provide a connector for an external engine speed limiter in view of the above-mentioned deficiencies in the prior art, which can improve the connection reliability between the engine speed limiter and the crankshaft and extend its service life.

[0007] The technical solution of the present utility model is as follows: a connector for an external engine speed limiter, comprising a connecting sleeve and a connecting shaft, one end of the connecting sleeve is provided with a crankshaft end flange that can be connected to the crankshaft flange, one end of the connecting shaft is provided with a speed limiter end flange that can be connected to the rotating shaft flange of the engine speed limiter, a plug-in slot is provided in the connecting sleeve, the other end of the connecting shaft is slidably inserted into the plug-in slot from the other end of the connecting sleeve, at least two limit slots extending axially along the connecting sleeve are concavely provided on the connecting sleeve corresponding to the inner wall of the plug-in slot, the outer wall of the other end of the connecting shaft is convexly provided with limit blocks with the same number as the limit slots, the limit blocks are slidably inserted in the limit slots in a one-to-one manner, and a tension spring is provided in the plug-in slot on one side of the connecting shaft.

[0008] As a further improvement, the outer edges of the crankshaft end flange and the speed limiter end flange are provided with multiple bolt holes, the bolt hole positions corresponding to the crankshaft end flange correspond one-to-one with the flange hole positions of the crankshaft flange, and the bolt hole positions corresponding to the speed limiter end flange correspond one-to-one with the flange hole positions of the rotating shaft flange.

[0009] Furthermore, the bolt holes are all long waist-shaped holes extending radially.

[0010] Furthermore, the plug-in slot and the limiting slot both extend to the other end face of the connecting sleeve, and a blocking cover for blocking the limiting slot is detachably installed on the other end of the connecting sleeve, and the connecting shaft is slidably inserted in the blocking cover.

[0011] Furthermore, the cross section of the blocking cover is U-shaped, and the blocking cover is screwed to the other end of the connecting sleeve through threads, and a sliding hole that matches the diameter of the connecting shaft is opened in the middle of the blocking cover.

[0012] Furthermore, the outer wall of the blocking cover is provided with anti-slip grooves.

[0013] Furthermore, the connecting sleeve and the crankshaft end flange are integrally formed structures, and the connecting shaft and the speed limiter end flange are integrally formed structures.

[0014] Beneficial effects

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The connector of the utility model is provided with a relatively slidable connecting sleeve and a connecting shaft. When the external engine speed limiter is installed, it is installed at a position where the crankshaft flange and the rotating shaft flange are at a certain distance. Then, by adjusting the position of the connecting sleeve and the connecting shaft, the entire connector can be placed between the crankshaft flange and the rotating shaft flange. Then, the crankshaft end flange is pulled to fit the crankshaft flange and is positioned and locked with a fastening bolt. Finally, the speed limiter end flange is pulled to fit the rotating shaft flange and is positioned and locked with a fastening bolt, eliminating the installation error of the engine speed limiter or the error during its own production and processing, and realizing the connection between the rotating shaft of the engine speed limiter and the crankshaft of the engine, which can improve the connection reliability between the engine speed limiter and the crankshaft and extend its service life. At the same time, after the rotating shaft of the engine speed limiter is connected to the crankshaft of the engine, the tension spring in the connecting sleeve is in a stretched state, and the elastic force of the tension spring can pull the connecting shaft and the connecting sleeve back, thereby increasing the friction between the fastening bolt and the flange, playing a role in preventing loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of the present utility model when in use;

[0019] Figure 3 It is a side structural schematic diagram of the connecting sleeve in the utility model.

[0020] Among them: 1. Connecting sleeve; 2. Connecting shaft; 3. Crankshaft flange; 4. Crankshaft end flange; 5. Rotating shaft flange; 6. Speed limiter end flange; 7. Connecting slot; 8. Limiting slot; 9. Limiting block; 10. Tension spring; 11. Bolt hole; 12. Sealing cover. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0022] See Figure 1-3The utility model is a connector for an external engine speed limiter, comprising a connecting sleeve 1 and a connecting shaft 2. A crankshaft end flange 4 is provided at one end of the connecting sleeve 1 and can be connected to a crankshaft flange 3. A speed limiter end flange 6 is provided at one end of the connecting shaft 2 and can be connected to a rotating shaft flange 5 of the engine speed limiter. A plug-in slot 7 is provided in the connecting sleeve 1. The other end of the connecting shaft 2 is slidably inserted into the plug-in slot 7 from the other end of the connecting sleeve 1, so that the position of the connecting shaft 2 relative to the connecting sleeve 1 is adjustable. The inner wall of the plug-in slot 7 corresponds to the connecting sleeve 1 and is concave with at least two grooves along the connecting sleeve. 1 axially extending limiting groove 8, the outer wall of the other end of the connecting shaft 2 is protruded with limiting blocks 9 of the same number as the limiting grooves 8, wherein the limiting blocks 9 are slidably inserted in the limiting grooves 8 in a one-to-one correspondence, playing a role in limiting the circumferential rotation of the connecting shaft 2, so that the connecting shaft 2 and the connecting sleeve 1 can rotate synchronously, and a tension spring 10 is provided in the plug-in groove 7 on one side of the connecting shaft 2, and the two ends of the tension spring 10 are respectively connected to the other end of the connecting shaft 2 and the bottom of the plug-in groove 7. After the rotating shaft of the engine speed limiter is connected to the crankshaft of the engine, the tension spring 10 is in a tensioned state.

[0023] The connector of the present invention is provided with a relatively slidable connecting sleeve 1 and a connecting shaft 2. When the external engine speed limiter is installed, it is installed at a position where the crankshaft flange 3 and the rotating shaft flange 5 have a certain distance to ensure that the connector can be placed between the two. Then, by adjusting the position of the connecting sleeve 1 and the connecting shaft 2, the entire connector can be placed between the crankshaft flange and the rotating shaft flange. Then, the crankshaft end flange 4 is pulled to fit with the crankshaft flange 3 and positioned and locked with a fastening bolt. Finally, the speed limiter end flange 6 is pulled to fit with the rotating shaft flange 5 and positioned and locked with a fastening bolt. This eliminates the installation error of the engine speed limiter or the error during its own production and processing, realizes the connection between the rotating shaft of the engine speed limiter and the crankshaft of the engine, can improve the connection reliability between the engine speed limiter and the crankshaft, and prolong its service life. At the same time, after the rotating shaft of the engine speed limiter is connected to the crankshaft of the engine, the tension spring 10 in the connecting sleeve 1 is in a stretched state, and the elastic force of the tension spring 10 can pull the connecting shaft 2 and the connecting sleeve 1 back, thereby increasing the friction between the fastening bolt and the flange, playing a role in preventing loosening.

[0024] Preferably, multiple bolt holes 11 are provided on the outer edges of both the crankshaft end flange 4 and the speed governor end flange 6. The bolt holes 11 on the crankshaft end flange 4 correspond one-to-one with the flange holes on the crankshaft flange 3, and the bolt holes 11 on the speed governor end flange 6 correspond one-to-one with the flange holes on the rotating shaft flange 5, facilitating the use of fastening bolts and nuts to securely connect the two flanges. Furthermore, the bolt holes 11 are all radially extending, waist-shaped holes, facilitating adjustment of the radial position of the fastening bolts and making installation of the fastening bolts even more convenient.

[0025] Preferably, the plug-in slot 7 and the limiting slot 8 both extend to the other end face of the connecting sleeve 1, and a blocking cover 12 that blocks the limiting slot 8 is detachably installed on the other end of the connecting sleeve 1, and the connecting shaft 2 is slidably inserted into the blocking cover 12. In actual use, the blocking cover 12 can prevent some dust and other impurities from entering the connecting sleeve 1 and affecting the sliding problem, and it is also convenient for disassembly and maintenance. Furthermore, the cross-section of the blocking cover 12 is U-shaped, and the blocking cover 12 is screwed to the other end of the connecting sleeve 1 by means of threads, and a sliding hole that matches the diameter of the connecting shaft 2 is provided in the middle of the blocking cover 12. The blocking cover 12 is installed by threaded installation, which makes disassembly and assembly more convenient. Furthermore, anti-slip grooves are provided on the outer wall of the blocking cover 12 to facilitate the rotation of the blocking cover 12.

[0026] Preferably, the connecting sleeve 1 and the crankshaft end flange 4 are an integrally formed structure. Similarly, the connecting shaft 2 and the speed limiter end flange 6 are an integrally formed structure, which further improves the structural strength of the connecting sleeve and the crankshaft end flange 4, and the connecting shaft 2 and the speed limiter end flange 6, thereby improving the connection reliability.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A connector for an external engine speed limiter, characterized in that: The invention comprises a connecting sleeve (1) and a connecting shaft (2), wherein one end of the connecting sleeve (1) is provided with a crankshaft end flange (4) which can be connected to a crankshaft flange (3), and one end of the connecting shaft (2) is provided with a speed limiter end flange (6) which can be connected to a rotating shaft flange (5) of an engine speed limiter. A plug-in slot (7) is provided in the connecting sleeve (1), and the other end of the connecting shaft (2) is slidably inserted into the plug-in slot (7) from the other end of the connecting sleeve (1). At least two limiting slots (8) extending along the axial direction of the connecting sleeve (1) are provided on the connecting sleeve (1) corresponding to the inner wall of the plug-in slot (7). The outer wall of the other end of the connecting shaft (2) is convexly provided with limiting blocks (9) whose number is the same as the number of the limiting slots (8). The limiting blocks (9) are slidably inserted into the limiting slots (8) in a one-to-one correspondence. A tension spring (10) is provided in the plug-in slot (7) on one side of the connecting shaft (2).

2. The connector of an external engine speed limiter according to claim 1, characterized in that: The outer edges of the crankshaft end flange (4) and the speed limiter end flange (6) are both provided with a plurality of bolt holes (11); the positions of the bolt holes (11) corresponding to the crankshaft end flange (4) correspond one-to-one to the flange hole positions of the crankshaft flange (3); and the positions of the bolt holes (11) corresponding to the speed limiter end flange (6) correspond one-to-one to the flange hole positions of the rotating shaft flange (5).

3. The connector of an external engine speed limiter according to claim 2, characterized in that: The bolt holes (11) are all long waist-shaped holes extending in the radial direction.

4. The connector of an external engine speed limiter according to claim 1, characterized in that: The plug-in slot (7) and the limiting slot (8) both extend to the other end face of the connecting sleeve (1), and a blocking cover (12) for blocking the limiting slot (8) is detachably mounted on the other end of the connecting sleeve (1), and the connecting shaft (2) is slidably inserted into the blocking cover (12).

5. The connector of an external engine speed limiter according to claim 4, characterized in that: The cross section of the blocking cover (12) is U-shaped, and the blocking cover (12) is screwed to the other end of the connecting sleeve (1) through a thread, and a sliding hole matching the diameter of the connecting shaft (2) is provided in the middle of the blocking cover (12).

6. The connector of an external engine speed limiter according to claim 5, characterized in that: The outer wall of the blocking cover (12) is provided with anti-slip grooves.

7. A connector for an external engine speed limiter according to any one of claims 1 to 6, characterized in that: The connecting sleeve (1) and the crankshaft end flange (4) are integrally formed structures, and the connecting shaft (2) and the speed limiter end flange (6) are integrally formed structures.

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