A high-sensitivity speed regulating device of torsion spring structure

Abstract

The utility model discloses a kind of speed regulating device of high sensitivity torsion spring type structure, it is related to fuel injection pump mechanical speed regulator field, including rear shell, speed regulating torsion spring, speed regulating arm assembly, intermediate shaft, speed regulating lever, speed regulating sleeve, fly block, rack rod return spring, rack rod, connecting rod and adjusting assembly;Speed regulating arm assembly includes speed regulating arm, and intermediate shaft is arranged in the middle of speed regulating arm, and speed regulating arm is provided with inlay on the side away from speed regulating torsion spring, and speed regulating arm shaft is arranged in the side close to speed regulating torsion spring of speed regulating arm, and the sleeve of slide is sleeved in the both ends of speed regulating arm shaft, and speed regulating torsion spring is pressed and combined on the sleeve;This kind of speed regulating device of high sensitivity torsion spring type structure can improve the sensitivity of speed regulating device adjustment, to realize the accurate regulation of rotational speed.

Description

Technical Field

[0001] This utility model relates to the field of mechanical speed regulators for fuel injection pumps, specifically a speed regulating device with a high-sensitivity torsion spring structure. Background Technology

[0002] In the field of diesel engines, the speed control device is a key component for achieving speed regulation. In existing speed governors equipped with speed control torsion springs, the speed control arm is mostly made of powder metallurgy or precision casting, which has a large mass and inertia. At the same time, the speed control torsion spring that works with it is often a straight arm structure, and the strength at the contact point between the speed control torsion spring and the speed control arm is relatively low. It is prone to bending during speed regulation, which leads to the incomplete transmission of regulation force and thus reduces regulation sensitivity. Utility Model Content

[0003] The purpose of this invention is to provide a high-sensitivity torsion spring type speed regulating device, which can improve the sensitivity of the speed regulating device to achieve precise speed regulation.

[0004] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a high-sensitivity torsion spring type speed regulating device, including a rear shell, a speed regulating torsion spring, a speed regulating arm assembly, an intermediate shaft, a speed regulating lever, a speed regulating sleeve, a fly block, a rack return spring, a rack, a connecting rod, and an adjusting assembly; the speed regulating arm assembly includes a speed regulating arm, the intermediate shaft is provided through the middle of the speed regulating arm, an insert is provided on the side of the speed regulating arm away from the speed regulating torsion spring, a speed regulating arm shaft is provided through the side of the speed regulating arm close to the speed regulating torsion spring, and sliding sleeves are sleeved at both ends of the speed regulating arm shaft, and the speed regulating torsion spring is pressed onto the sliding sleeves.

[0005] In some embodiments, the speed control arm assembly further includes a wire retaining ring, which is coaxially disposed between the sliding sleeve and the speed control arm shaft.

[0006] In some embodiments, the speed-regulating torsion spring is Z-shaped, and the sliding sleeve is provided at the bend of the speed-regulating torsion spring.

[0007] In some embodiments, a starting spring mounting hole is provided laterally on the bottom of the speed regulating arm near the speed regulating sleeve, a starting spring is provided in the starting spring mounting hole, and the side of the starting spring away from the starting spring mounting hole is fixedly connected to the speed regulating lever.

[0008] In some embodiments, the adjustment assembly includes a positioning screw and a speed-regulating shaft. The speed-regulating shaft is disposed on the rear housing, and the speed-regulating torsion spring is sleeved on the speed-regulating shaft. The positioning screw is disposed on the speed-regulating shaft.

[0009] In some embodiments, a correction component is provided on the side of the rear housing away from the speed control arm, and a corrector top rod is slidably provided in the correction component, the corrector top rod being in contact with the insert on the side near the speed control arm.

[0010] In some embodiments, the rear housing is provided with a buffer assembly on the side away from the bottom of the speed control arm and away from the speed control sleeve.

[0011] In some embodiments, a support block is provided between the speed regulating sleeve and the speed regulating lever.

[0012] In summary, this utility model has the following beneficial effects:

[0013] This invention sets the speed-regulating torsion spring in a Z-shape, which increases the strength of the connection between the speed-regulating torsion spring and the sliding sleeve, thereby reducing the possibility of bending of the speed-regulating torsion spring during speed regulation, improving the integrity of the adjustment force transmission, and thus improving the adjustment sensitivity. At the same time, a starting spring is added between the bottom of the speed-regulating arm and the bottom of the speed-regulating lever, which can realize a flexible connection between the speed-regulating arm and the speed-regulating lever, avoiding the speed difference between the two after the speed-regulating lever and the speed-regulating arm have a rigid collision, thereby improving the stability of the speed regulation process. When the diesel engine is stationary, it can cooperate with the rack return spring to increase the force applied to the speed-regulating lever, thereby facilitating the acquisition of the starting enrichment amount and improving the starting sensitivity of the diesel engine. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front view of the speed regulating arm assembly of this utility model;

[0016] Figure 3 This is a side view of the speed regulating arm assembly of this utility model.

[0017] In the diagram: 1. Rear housing; 2. Speed ​​regulating torsion spring; 3. Sliding sleeve; 4. Speed ​​regulating arm assembly; 5. Corrector component; 6. Corrector top rod; 7. Parking shaft; 8. Bearing; 9. Intermediate shaft; 10. Sealing cover; 11. Buffer assembly; 12. Starting spring; 13. Speed ​​regulating lever; 14. Support block; 15. Speed ​​regulating sleeve; 16. Fly block; 17. Gear rack return spring; 18. Gear rack; 19. Positioning screw; 20. Connecting rod; 21. Speed ​​regulating shaft; 22. Speed ​​regulating arm; 23. Insert; 24. Speed ​​regulating arm shaft; 25. Steel wire retaining ring. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] refer to Figure 1-3 A high-sensitivity torsion spring type speed regulating device includes a rear housing 1, a speed regulating torsion spring 2, a speed regulating arm assembly 4, an intermediate shaft 9, a speed regulating lever 13, a speed regulating sleeve 15, a fly block 16, a rack return spring 17, a rack 18, a connecting rod 20, and an adjusting assembly; the intermediate shaft 9 is fixed inside the rear housing 1, and the speed regulating arm assembly 4 and the speed regulating lever 13 are mounted on the rear housing 1 of the speed regulator through a bearing 8 and the intermediate shaft 9 passing through the bearing 8, so as to realize the rotation of the speed regulating arm assembly 4 and the speed regulating lever 13 around the intermediate shaft 9. The bottom of the speed control arm assembly 4 can be connected to the buffer assembly 11 via an installation accessory, which is existing technology and will not be described in detail here; the speed control sleeve 15 is located on the bottom of the rear housing 1 away from the bottom of the speed control arm 22; the fly block 16 is rotatably located inside the rear housing 1 near the speed control sleeve 15; the fly block 16 and the speed control sleeve 15 are in contact and engaged; the rack 18 is slidably located inside the rear housing 1 away from the speed control lever 13; the rack return spring 17 is sleeved on the rack 18; the connecting rod 20 is rotatably connected between the rack 18 and the speed control lever 13; the two ends of the connecting rod 20 can be axially connected to the rack 18 and the speed control lever 13 respectively. The rear housing 1 may also be equipped with a parking shaft 7 at the speed control lever 13. The speed control arm assembly 4 includes a speed control arm 22, with an intermediate shaft 9 passing through the middle of the speed control arm 22. An insert 23 is provided on the side of the speed control arm 22 away from the speed control torsion spring 2, and a speed control arm shaft 24 passes through the side of the speed control arm 22 near the speed control torsion spring 2. Sliding sleeves 3 are fitted at both ends of the speed control arm shaft 24. One side of the sliding sleeve 3 contacts the speed control torsion spring 2. The sliding sleeve 3 may be provided with an annular groove, on which the speed control torsion spring 2 is pressed. The inner hole of the sliding sleeve 3 can be positioned on the speed control arm shaft 24 by a steel wire retaining ring 25. The adjustment assembly includes a positioning screw 19 and a speed control shaft 21. The speed control shaft 21 is located on the rear housing 1 near the speed control lever 13. The positioning screw 19 is located on the speed control shaft 21. The speed control torsion spring 2 is fitted on the speed control shaft 21 and pressed onto the sliding sleeve 3.

[0020] The speed control lever 13 and the speed control arm assembly 4 can control the movement of the rack 18, which is connected to the speed control lever 13 via a connecting rod to directly control the fuel supply of the diesel engine. The rack return spring 17 provides the elastic force to enrich the fuel when the diesel engine starts. The speed control torsion spring 2 is pressed onto the sliding sleeve 3 to provide the necessary torque. According to the change of diesel engine speed, the torque of the speed control torsion spring 2 can be adjusted by adjusting the rotation angle of the speed control shaft 21 and the position of the positioning screw 19. According to the change of diesel engine speed, under the control of centrifugal force, the fly block 16 controls the movement of the speed control lever 13 through the speed control sleeve 15.

[0021] In some embodiments, the speed regulating torsion spring 2 is Z-shaped, and a sliding sleeve 3 is provided at the bend of the speed regulating torsion spring 2. The Z-shaped speed regulating torsion spring 2 can enhance the overall strength of the speed regulating torsion spring 2, thereby reducing the possibility of the speed regulating torsion spring 2 bending during the speed regulation process, improving the integrity of the adjustment force transmission, and thus improving the adjustment sensitivity.

[0022] In some embodiments, a starting spring mounting hole is provided laterally on the bottom of the speed control arm 22 near the speed control sleeve 15. A starting spring 12 is installed in the starting spring mounting hole. The side of the starting spring 12 away from the starting spring mounting hole is fixedly connected to the speed control lever 13. The starting spring 12 can realize a flexible connection between the speed control arm 22 and the speed control lever 13. Through the elastic deformation of the starting spring 12, after the speed control lever 13 applies a force to the speed control arm 22, the two become a whole and rotate together, avoiding the speed difference between the speed control lever 13 and the speed control arm 22 after rigid collision, thereby improving the stability of the speed control process. When the diesel engine is stationary, it can cooperate with the rack return spring 17 to increase the force applied to the speed control lever 13, thereby facilitating the obtaining of the starting enrichment amount and improving the starting sensitivity of the diesel engine.

[0023] In some embodiments, a corrector component 5 is provided on the side of the rear housing 1 away from the speed control arm 22, and a corrector top rod 6 is slidably provided in the corrector component 5. The corrector top rod 6 contacts the insert 23 on the side near the speed control arm 22.

[0024] When it is necessary to fine-tune the oil supply of the speed regulating device, the position of the corrector push rod 6 in the corrector component 5 can be adjusted to change the contact position between the insert 23 and the corrector push rod 6, thereby achieving fine-tuning of the speed regulating arm assembly 4 and thus adjusting the oil supply.

[0025] In some embodiments, a buffer assembly 11 is provided on the side of the rear housing 1 away from the bottom of the speed control arm 22 and away from the speed control sleeve 15. The buffer assembly 11 may include a buffer component and a buffer shaft. The buffer component is disposed on the side of the rear housing 1 and below the corrector component 5. The buffer shaft is disposed inside the buffer component. The buffer shaft and the bottom of the speed control arm 22 can be connected through the convex surface of the hemispherical boss.

[0026] When the speed regulating arm 22 rotates rapidly during speed regulation, its hemispherical boss will contact the buffer shaft. Through the buffering effect of the buffer shaft, the rotation speed of the speed regulating arm 22 can be reduced, mechanical shock and vibration can be reduced, and the stability and reliability of the speed regulating device can be protected.

[0027] In some embodiments, a support block 14 may be provided between the speed regulating sleeve 15 and the speed regulating lever 13. The support block 14 is fixed on the side of the speed regulating lever 13 near the speed regulating sleeve 15 and fits against the speed regulating sleeve 15 to realize the transmission of force between the speed regulating sleeve 15 and the speed regulating lever 13.

[0028] In some embodiments, a sealing cover 10 is provided on the outside of the rear shell 1, and a buffer assembly 11 is provided inside the sealing cover 10. The sealing cover 10 can prevent external dust, impurities and other contaminants from entering the interior of the buffer assembly 11, thereby ensuring the normal operation and service life of the buffer assembly 11.

[0029] The specific working principle is as follows:

[0030] When the diesel engine starts, the sum of the spring forces of the starting spring 12 and the rack return spring 17 is greater than the centrifugal force of the fly block 16. This force pushes the rack 18 to the right through the connecting rod 20, which is connected to the speed control lever 13 and the rack 18, thereby obtaining the starting enrichment fuel quantity.

[0031] After starting, the speed increases, and the fly block 16 opens under the action of centrifugal force. It drives the support block 14 through the speed regulating sleeve 15, thereby causing the speed regulating lever 13 to rotate counterclockwise around the intermediate shaft 9. The speed regulating lever 13 connects with the outer side of the speed regulating arm 22 through the inner side, and drives the rack 18 to move in the oil reduction direction through the connecting rod 20 until the centrifugal force of the fly block 16 is balanced with the elastic force of the starting spring 12, the elastic force of the rack return spring 17 and the torsional force of the speed regulating torsion spring 2. At this time, the diesel engine runs stably.

[0032] According to the working conditions, by rotating the positioning screw 19 installed on the speed regulating shaft 21, the speed regulating torsion spring 2 is driven to twist and apply force. This force acts on the left side of the sliding sleeve 3 on the speed regulating arm shaft 24 of the speed regulating arm assembly 4. By adjusting the rotation angle of the speed regulating shaft 21, the torque of the speed regulating spring 2 can be adjusted to achieve high and low speed control of the engine.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-sensitivity torsion spring type speed regulating device, comprising a rear shell (1), a speed regulating torsion spring (2), a speed regulating arm assembly (4), an intermediate shaft (9), a speed regulating lever (13), a speed regulating sleeve (15), a fly block (16), a rack return spring (17), a rack (18), a connecting rod (20), and an adjustment assembly; characterized in that: The speed control arm assembly (4) includes a speed control arm (22), with the intermediate shaft (9) passing through the middle of the speed control arm (22). A block (23) is provided on the side of the speed control arm (22) away from the speed control torsion spring (2). A speed control arm shaft (24) passes through the side of the speed control arm (22) close to the speed control torsion spring (2). Sliding sleeves (3) are fitted at both ends of the speed control arm shaft (24), and the speed control torsion spring (2) is pressed onto the sliding sleeves (3). The speed regulating torsion spring (2) is Z-shaped, and the sliding sleeve (3) is provided at the bend of the speed regulating torsion spring (2).

2. The speed regulating device with a high-sensitivity torsion spring structure according to claim 1, characterized in that: The speed control arm assembly (4) also includes a wire retaining ring (25), which is coaxially disposed between the sliding sleeve (3) and the speed control arm shaft (24).

3. The speed regulating device with a high-sensitivity torsion spring structure according to claim 1, characterized in that: The bottom of the speed control arm (22) is provided with a starting spring mounting hole on the side near the speed control sleeve (15). A starting spring (12) is provided in the starting spring mounting hole. The side of the starting spring (12) away from the starting spring mounting hole is fixedly connected to the speed control lever (13).

4. The speed regulating device with a high-sensitivity torsion spring structure according to claim 1, characterized in that: The adjustment assembly includes a positioning screw (19) and a speed adjustment shaft (21). The speed adjustment shaft (21) is located on the rear shell (1). The speed adjustment torsion spring (2) is sleeved on the speed adjustment shaft (21). The positioning screw (19) is located on the speed adjustment shaft (21).

5. The speed regulating device with a high-sensitivity torsion spring structure according to claim 1, characterized in that: The rear shell (1) is provided with a correction component (5) on the side away from the speed control arm (22). The correction component (5) is slidably provided with a corrector top rod (6). The corrector top rod (6) is in contact with the insert (23) on the side close to the speed control arm (22).

6. The speed regulating device with a high-sensitivity torsion spring structure according to claim 1, characterized in that: A buffer assembly (11) is provided on the bottom side of the rear shell (1) away from the speed control arm (22) and away from the speed control sleeve (15).

7. The speed regulating device with a high-sensitivity torsion spring structure according to claim 1, characterized in that: A support block (14) is provided between the speed regulating sleeve (15) and the speed regulating lever (13).

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