Pressure switch for low-pressure oil delivery pump

Abstract

The utility model discloses a pressure switch for a low-pressure oil delivery pump in the technical field of oil delivery pump processing, which comprises a base, a switch device is arranged at the top of the base, limiting blocks are fixedly mounted on the left side and the right side of the bottom of the switch device, and a limiting groove is formed in an inner cavity of the base. The oil limiting blocks are fixedly installed on the left side and the right side of the bottom of the switch device, the limiting groove is formed in the base, a worker can align the limiting blocks at the bottom of the switch device with the limiting groove for placing and inserting, the inserting rods are arranged on the left side and the right side of the limiting groove, and the worker pulls out the two inserting rods before inserting, so that the worker can conveniently place the switch device. And after the limiting block is inserted, the insertion rods are loosened, the two insertion rods are subjected to the elastic force of the telescopic spring, and the plug pin at one end is inserted into the insertion groove in the limiting block, so that the switch device can be quickly mounted or dismounted by using the plug pin and the telescopic spring, quick assembly of the switch device is realized, time and labor are saved, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pump processing, in particular to a pressure switch for a low-pressure oil pump. Background Art

[0002] The function of the oil pump is to ensure that the diesel oil circulates in the low-pressure oil circuit and supply sufficient quantity and certain pressure of fuel to the injection pump. Its oil delivery should be 3-4 times the maximum injection volume of full load. The oil pump is divided into gear oil pump, diaphragm oil pump, plunger oil pump, pipeline oil pump and so on.

[0003] The existing oil pump is equipped with a switch device at its output end to adjust the power of the oil pump, but the existing switch device is complicated to install and takes a lot of time to disassemble for maintenance. Therefore, we propose a pressure switch for a low-pressure oil pump to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the purpose of the utility model is to provide a pressure switch for a low-pressure oil pump, which can solve the problem that the existing oil pump has a switch device installed at its output end to adjust the power of the oil pump, but the existing switch device is complicated to install and it takes a lot of time to disassemble it for maintenance.

[0006] In order to solve the above technical problems, the utility model provides a pressure switch for a low-pressure oil pump, which adopts the following technical scheme: it includes a base, a switch device is provided on the top of the base, limit blocks are fixedly installed on the left and right sides of the bottom of the switch device, a limit groove is provided in the inner cavity of the base, and the two limit blocks are adapted to the limit groove, the switch device is inserted into the limit groove inside the base through the limit blocks on the left and right sides of the bottom, and a limit plate is fixedly installed between the upper and lower inner walls at the left and right ends of the limit groove, a slot is provided on the side away from the two limit blocks, and rods are inserted on the surfaces of the two limit plates, and pins are fixedly installed on the ends of the two rods that are close to each other, and the two pins are adapted to the slots at corresponding positions, and telescopic springs are sleeved on the outside of the two rods, and the two telescopic springs are located between adjacent pins and limit plates.

[0007] Optionally, an oil pump body is fixedly mounted on the top of the base, a drive shaft is fixedly connected to the output end of the oil pump body, and the drive shaft is arranged in transmission with the switch device.

[0008] By adopting the above technical solution, the present solution is provided with an oil pump body, and the front output end of the oil pump body is fixedly connected with a driving shaft, and the oil pump body is arranged in transmission with the switch device through the driving shaft.

[0009] Optionally, a support plate is fixedly installed on the top of the base, the drive shaft passes through the surface of the support plate, and the drive shaft is rotatably connected to the surface of the support plate, and a protective shell is provided on the rear side of the switch device.

[0010] By adopting the above technical solution, in this solution, a support plate is fixedly installed on the top of the base, and the drive shaft is rotatably connected to the surface of the support plate. The support plate can provide auxiliary support for the drive shaft. A protective shell is provided on the rear side of the switch device, and the protective shell can provide external protection for the connection between the drive shaft and the switch device.

[0011] Optionally, a connecting sleeve is fixedly installed on the rear side of the switch device, and the connecting sleeve is arranged on the outside of the drive shaft.

[0012] By adopting the above technical solution, in this solution, a connecting sleeve is fixedly installed on the rear side of the switch device, and the connecting sleeve can seal and protect the outside of the drive shaft.

[0013] Optionally, a sealing ring is provided on the outer sleeve of the driving shaft, the sealing ring is attached to the front side of the supporting plate, and the sealing ring is located inside the connecting sleeve.

[0014] By adopting the above technical solution, in this solution, a sealing ring is sleeved on the outside of the driving shaft, and the sealing ring can perform sealing protection between the driving shaft and the support plate.

[0015] Optionally, a sealing sleeve is provided on the front side of the sealing ring, the sealing sleeve is sleeved on the outside of the driving shaft, and the circumferential outer wall of the sealing sleeve is fitted on the circumferential inner wall of the connecting sleeve.

[0016] By adopting the above technical solution, the present solution provides a sealing sleeve on the front side of the sealing ring, and the sealing sleeve is arranged outside the driving shaft, thereby preventing the oil at the switch device from penetrating onto the driving shaft.

[0017] Optionally, the rear surface of the protective shell is fixedly mounted on the front side of the support plate by a plurality of bolts, and the front surface of the protective shell is fixedly mounted on the rear side of the switch device by a plurality of bolts.

[0018] By adopting the above technical solution, the present solution protects the connecting sleeve and the internal driving shaft by fixing the front and rear sides of the protective shell to the rear side of the switch device and the front side of the support plate with bolts respectively.

[0019] In summary, the utility model includes at least one of the following beneficial effects: 1. By fixing the limit blocks on the left and right sides of the bottom of the switch device and providing the limit slots inside the base, the staff can align the limit blocks at the bottom of the switch device with the limit slots for placement and insertion. By providing the insertion rods on the left and right sides of the limit slots, the staff can pull out the two insertion rods before insertion, and then release the insertion rods after the limit blocks are inserted. The two insertion rods are subjected to the elastic force of the telescopic springs, and the pins at one end are inserted into the slots inside the limit blocks, so that the switch device can be quickly installed or disassembled by using the pins and telescopic springs, and the switch device can be quickly assembled, which saves time and effort and has strong practicality.

[0020] 2. A support plate is fixedly installed on the top of the base, and the drive shaft is rotatably connected to the surface of the support plate. The support plate can provide auxiliary support for the drive shaft. A protective shell is provided on the rear side of the switch device, and the protective shell can provide external protection for the connection between the drive shaft and the switch device, thereby achieving external protection of the drive shaft and preventing the drive shaft from being damaged by the outside. A sealing sleeve is provided on the front side of the sealing ring, and the sealing sleeve is provided on the outside of the drive shaft, thereby preventing the oil at the switch device from penetrating onto the drive shaft, thereby achieving sealing protection between the drive shaft and the switch device, preventing oil leakage, and extending the service life of the oil pump and the switch device, with strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the internal structure of the base of the utility model;

[0023] Figure 2 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0024] Figure 3 This is a schematic diagram of the rod structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the front side of the overall structure of the utility model;

[0026] Figure 5 It is a schematic diagram of the rear side of the overall structure of the utility model;

[0027] Figure 6 It is a schematic diagram of the internal structure of the protective shell of the utility model.

[0028] Explanation of the accompanying drawings: 1. base; 2. switch device; 3. limit block; 4. limit groove; 5. limit plate; 6. slot; 7. plug rod; 8. latch; 9. telescopic spring; 10. oil pump body; 11. drive shaft; 12. support plate; 13. protective shell; 14. connecting sleeve; 15. sealing ring; 16. bolt; 17. sealing sleeve. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-6 The utility model is described in further detail.

[0030] Embodiment 1, refer to Figure 1-3 In this embodiment, in order to solve the problem that the existing oil pump is equipped with a switch device at its output end to adjust the power of the oil pump, but the existing switch device is complicated to install and takes a lot of time to disassemble for maintenance, the utility model discloses a pressure switch for a low-pressure oil pump.

[0031] It includes a base 1, a switch device 2 is provided on the top of the base 1, limit blocks 3 are fixedly installed on the left and right sides of the bottom of the switch device 2, a limit slot 4 is provided in the inner cavity of the base 1, and the two limit blocks 3 are adapted to the limit slot 4, the switch device 2 is inserted into the limit slot 4 inside the base 1 through the limit blocks 3 on the left and right sides of the bottom, and a limit plate 5 is fixedly installed between the upper and lower inner walls at both ends of the limit slot 4, a slot 6 is provided on the side away from the two limit blocks 3, and plug rods 7 are inserted on the surfaces of the two limit plates 5, and pins 8 are fixedly installed on the ends of the two plug rods 7 that are close to each other, and the two pins 8 are adapted to the slots 6 at corresponding positions, and telescopic springs 9 are sleeved on the outside of the two plug rods 7, and the two telescopic springs 9 are located between adjacent pins 8 and the limit plates 5.

[0032] The specific working principle is: by fixing the limit blocks 3 on the left and right sides of the bottom of the switch device 2, and opening the limit slot 4 inside the base 1, the staff first pulls out the plug rods 7 on both sides of the base 1, and then places the limit blocks 3 inside the limit slot 4, and releases the plug rod 7 again. Since a latch 8 is fixedly installed at one end of the plug rod 7, and a telescopic spring 9 is provided between the latch 8 and the limit plate 5, the latch 8 is inserted into the slot 6 of the limit block 3 at the corresponding position under the action of the telescopic spring 9, thereby limiting the limit block 3 inside the limit slot 4.

[0033] Example 2, refer to Figure 4-6 In order to solve the problem of lack of safety and sealing protection at the connection between the existing switch device and the oil pump, based on the same concept as the above-mentioned embodiment 1, the pressure switch for the low-pressure oil pump also includes:

[0034] An oil pump body 10 is fixedly mounted on the top of the base 1 , and a driving shaft 11 is fixedly connected to the output end of the oil pump body 10 . The driving shaft 11 is arranged in a transmission manner with the switch device 2 .

[0035] A support plate 12 is fixedly mounted on the top of the base 1 , a driving shaft 11 passes through the surface of the support plate 12 , and the driving shaft 11 is rotatably connected to the surface of the support plate 12 , and a protective shell 13 is provided at the rear side of the switch device 2 .

[0036] A connecting sleeve 14 is fixedly mounted on the rear side of the switch device 2 , and the connecting sleeve 14 is sleeved on the outside of the driving shaft 11 .

[0037] A sealing ring 15 is sleeved on the outside of the driving shaft 11 . The sealing ring 15 is attached to the front side of the supporting plate 12 , and the sealing ring 15 is located inside the connecting sleeve 14 .

[0038] A sealing sleeve 17 is provided on the front side of the sealing ring 15 . The sealing sleeve 17 is sleeved on the outside of the driving shaft 11 , and the circumferential outer wall of the sealing sleeve 17 is in contact with the circumferential inner wall of the connecting sleeve 14 .

[0039] The rear surface of the protection shell 13 is fixedly mounted on the front side of the support plate 12 by a plurality of bolts 16 , and the front surface of the protection shell 13 is fixedly mounted on the rear side of the switch device 2 by a plurality of bolts 16 .

[0040] The specific working principle is: an oil pump body 10 is provided, and a driving shaft 11 is fixedly connected to the output end of the front side of the oil pump body 10, the oil pump body 10 is arranged for transmission with the switch device 2 through the driving shaft 11, a support plate 12 is fixedly installed on the top of the base 1, and the driving shaft 11 is rotatably connected to the surface of the support plate 12, the support plate 12 can provide auxiliary support for the driving shaft 11, a protective shell 13 is provided on the rear side of the switch device 2, the protective shell 13 can provide external protection for the connection between the driving shaft 11 and the switch device 2, a connecting sleeve 14 is fixedly installed on the rear side of the switch device 2, the connecting sleeve 14 can provide sealing protection for the outside of the driving shaft 11, a sealing ring 15 is sleeved on the outside of the driving shaft 11, the sealing ring 15 can provide sealing protection between the driving shaft 11 and the support plate 12, a sealing sleeve 17 is provided on the front side of the sealing ring 15, and the sealing sleeve 17 is sleeved on the outside of the driving shaft 11, so as to prevent the oil at the switch device 2 from penetrating into the driving shaft 11, thereby providing sealing protection between the driving shaft 11 and the switch device 2.

[0041] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A pressure switch for a low-pressure oil pump, comprising a base (1), characterized in that: A switch device (2) is provided on the top of the base (1). Limit blocks (3) are fixedly installed on the left and right sides of the bottom of the switch device (2). A limit slot (4) is provided in the inner cavity of the base (1). The two limit blocks (3) are matched with the limit slot (4). The switch device (2) is inserted into the limit slot (4) inside the base (1) through the limit blocks (3) on the left and right sides of the bottom. Limit plates (5) are fixedly installed between the inner walls of the upper and lower sides of the left and right ends of the limit slot (4). A slot (6) is provided on the side away from the two limit blocks (3). Insert rods (7) are inserted on the surfaces of the two limit plates (5). Pins (8) are fixedly installed on the ends of the two insert rods (7) that are close to each other. The two pins (8) are matched with the slots (6) at corresponding positions. Telescopic springs (9) are sleeved on the outside of the two insert rods (7). The two telescopic springs (9) are located between adjacent pins (8) and the limit plates (5).

2. A pressure switch for a low-pressure oil pump according to claim 1, characterized in that: An oil pump body (10) is fixedly mounted on the top of the base (1), a drive shaft (11) is fixedly connected to the output end of the oil pump body (10), and the drive shaft (11) is arranged in transmission with the switch device (2).

3. A pressure switch for a low-pressure oil pump according to claim 2, characterized in that: A support plate (12) is fixedly mounted on the top of the base (1), the drive shaft (11) passes through the surface of the support plate (12), and the drive shaft (11) is rotatably connected to the surface of the support plate (12), and a protective shell (13) is provided on the rear side of the switch device (2).

4. A pressure switch for a low-pressure oil pump according to claim 1, characterized in that: A connecting sleeve (14) is fixedly mounted on the rear side of the switch device (2), and the connecting sleeve (14) is sleeved on the outside of the drive shaft (11).

5. A pressure switch for a low-pressure oil pump according to claim 4, characterized in that: The driving shaft (11) is externally sleeved with a sealing ring (15), the sealing ring (15) is attached to the front side of the supporting plate (12), and the sealing ring (15) is located inside the connecting sleeve (14).

6. A pressure switch for a low-pressure oil pump according to claim 5, characterized in that: A sealing sleeve (17) is provided on the front side of the sealing ring (15), the sealing sleeve (17) is sleeved on the outside of the drive shaft (11), and the circumferential outer wall of the sealing sleeve (17) is fitted on the circumferential inner wall of the connecting sleeve (14).

7. A pressure switch for a low-pressure oil pump according to claim 3, characterized in that: The rear surface of the protective shell (13) is fixedly mounted on the front side of the support plate (12) by means of a plurality of bolts (16); the front surface of the protective shell (13) is fixedly mounted on the rear side of the switch device (2) by means of a plurality of bolts (16).

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