Pump oil system spring seal and plunger integrated press-fitting device

Abstract

The utility model discloses a pump oil system spring seal and plunger integrated press fitting device which is characterized by comprising a connecting block fixedly installed on a piston rod of a press machine, an outer sleeve is fixedly installed at the lower end of the connecting block, a sliding shaft is installed in the outer sleeve in a sliding mode, and a spring is arranged between the sliding shaft and the lower end of the outer sleeve. The sliding shaft is located at the lowest position under the action of the spring; two-stage stepped holes are formed in the lower end of the sliding shaft, a plunger pressing head is installed in the small-diameter hole, a spring sealing pressing head is installed in the large-diameter hole, and the spring sealing pressing head is fixed through a tightening screw arranged at the lower end of the sliding shaft in the radial direction. In conclusion, the special structure and material design are adopted, it is ensured that enough pressure and stability can be provided in the press-fitting process, and therefore it is ensured that the spring seal and the plunger can be accurately and reliably pressed into the hole of the plunger sleeve. Meanwhile, the device further has good adaptability and flexibility and can meet the assembly requirements of oil pumping system components of different specifications and models.

Description

Technical Field

[0001] The utility model belongs to the technical field of pump oil system assembly, in particular to an integrated press-fit device for a flood seal and a plunger of the pump oil system. Background Art

[0002] In the assembly process of pump oil system components, the press-fitting of the pan seal and the plunger is a crucial link. In the traditional method, two independent toolings are usually required to press the pan seal and the plunger respectively, that is, first use one set of tooling to press the pan seal into the counterbore of the plunger sleeve, and then use another set of tooling to press the plunger into the plunger sleeve hole with the pan seal installed. Although this method can ensure the accuracy and quality of assembly, it has many inconveniences in actual operation.

[0003] First, using two sets of tooling means more equipment investment and storage space are needed, which increases production costs and management difficulties. Secondly, since two press-fitting operations need to be performed separately, not only does it extend the assembly time and reduce work efficiency, but it may also increase the risk of assembly errors due to multiple operations. In addition, the coordination between the two sets of tooling is also an issue that needs attention. If the coordination is not appropriate, it may affect the accuracy and reliability of the assembly.

[0004] In order to solve the above problems, this device proposes an innovative design idea, that is, to fix the pressure head of the press-fitting pan seal and plunger together to form an integrated tooling. Through this design, only one set of tooling is needed to complete the press-fitting of the pan seal and plunger at the same time. This integrated design not only simplifies the assembly process and improves work efficiency, but also reduces the tooling manufacturing cost and storage space requirements. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides an integrated press-fit device for a flood seal and a plunger of a pump oil system.

[0006] The utility model is realized as follows: a pump oil system flood seal and plunger integrated press-fit device, characterized in that: it comprises a connecting block fixedly mounted on the piston rod of a press machine, a jacket fixedly mounted on the lower end of the connecting block, a sliding shaft slidably mounted in the jacket, a spring is arranged between the sliding shaft and the lower end of the jacket, and in an initial state, the sliding shaft is located at the lowest position under the action of the spring;

[0007] The lower end of the sliding shaft is provided with two-stage stepped holes, wherein a plunger pressure head is installed in the small diameter hole, and a pan-seal pressure head is installed in the large diameter hole. The pan-seal is fixed by a tightening screw radially arranged on the lower end of the sliding shaft.

[0008] Further preferably, a bushing and a spacer made of nylon are provided in sequence between the plunger pressure head and the flood seal pressure head in the stepped hole to prevent the plunger from being scratched.

[0009] Further preferably, a limiting sleeve is screwed onto the outer sleeve to prevent the sliding shaft from falling off.

[0010] Further preferably, a locking nut is provided on the outer sleeve above the limiting sleeve.

[0011] Further preferably, a steel ball is provided at the upper end of the sliding shaft, and a cushion block is provided at the lower end of the connecting block corresponding to the position of the steel ball.

[0012] Advantages and technical effects of the utility model: The pump oil system plunger pair press-fitting device of the utility model achieves significant technical effects through its unique design and structure, which are specifically reflected in the following aspects:

[0013] Improve assembly efficiency: This device integrates the functions of pan-seal press-fitting and plunger press-fitting, and can complete the two-step press-fitting work in a single operation, greatly shortening the assembly time and improving the assembly efficiency.

[0014] Reduce production costs: The integrated design reduces the number and complexity of tooling manufacturing, thereby reducing production costs and tooling maintenance costs.

[0015] Guaranteed assembly quality: Through precise mechanical structure and control, the press-fitting accuracy and reliability of the pan seal and plunger are ensured, the risk of assembly error is reduced, and the quality and stability of the product are improved.

[0016] Easy to operate: The operation of this device is simple and intuitive. The pressing process can be completed by extending and retracting the cylinder piston. There is no need for complicated operating steps and manual intervention, which reduces the operating difficulty and skill requirements.

[0017] Strong adaptability: The sliding shaft, bushing, spacer and other components in the device can be replaced and adjusted according to different plunger and pan seal specifications to meet the assembly requirements of pump oil system components of different models and specifications.

[0018] Protect the plunger: By setting a nylon bushing and spacer in the stepped hole, the plunger is effectively prevented from being scratched during the press-fitting process, thereby protecting the surface quality of the plunger.

[0019] High safety: By setting components such as limit sleeves and locking nuts, the stability and safety of the sliding shaft during the press-fitting process are ensured, avoiding safety accidents caused by the sliding shaft falling off or shifting.

[0020] In summary, the pump oil system plunger pair press-fitting device of the utility model has achieved remarkable technical effects in improving assembly efficiency, reducing production costs, ensuring assembly quality, simple operation, strong adaptability and high safety, and provides an efficient and reliable solution for the assembly of pump oil system components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a press-fit pan plug seal;

[0022] Figure 1a yes Figure 1 Enlarged view of the middle P part

[0023] Figure 2 It is the state when the pan plug seal is pressed into place;

[0024] Figure 3 is a schematic diagram of a press-fit plunger;

[0025] Figure 3a yes Figure 3 Enlarged view of the middle R part;

[0026] Figure 4 It is the state when the plunger is pressed into place.

[0027] In the figure: 1. base plate; 2. locating pin; 3. locating sleeve; 4. guide sleeve; 5. universal seal pressure head; 6. bushing; 7. spacer sleeve; 8. limit sleeve; 9. plunger pressure head; 10. locking nut; 11. sliding shaft; 12. outer sleeve; 13. steel ball; 14. spring; 15. spacer block; 16. connecting block; 17. plunger sleeve; 18. plunger; 19. universal seal; 20. press machine. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0029] See also Figures 1 to 4 A pump oil system plunger pair press-fitting device, comprising a connecting block 16 fixedly mounted on the piston rod of a press machine 20, a sleeve 12 fixedly mounted on the lower end of the connecting block, a sliding shaft 11 slidably mounted in the sleeve, a spring 14 is arranged between the sliding shaft and the lower end of the sleeve, and in an initial state, the sliding shaft is located at the lowest position under the action of the spring force; a limit sleeve 8 is screwed on the sleeve to prevent the sliding shaft from falling; a two-stage stepped hole is arranged at the lower end of the sliding shaft, a plunger pressure head 9 is installed in the small-diameter hole, and a pan-seal pressure head 5 is installed in the large-diameter hole, and the pan-seal pressure head 5 is fixed by a tightening screw radially arranged on the lower end of the sliding shaft.

[0030] A nylon spacer 7 and a bushing 6 are arranged in sequence between the plunger pressure head and the flood seal pressure head in the stepped hole to prevent the plunger from being scratched.

[0031] A steel ball 13 is disposed at the upper end of the sliding shaft 11 , and a cushion block 15 is disposed at the lower end of the connecting block corresponding to the position of the steel ball.

[0032] A locking nut 10 is provided on the outer sleeve above the limiting sleeve 8 .

[0033] During operation, first fix and install the positioning seat, which includes 1, bottom plate; 2, positioning pin and 3 positioning sleeve. After fixing, place the plunger sleeve 17 in the hole of the positioning sleeve 3, then put the guide sleeve 4 on the outer circle of the upper end of the plunger sleeve, and then put the flood seal 19 into the hole of the guide sleeve 4. At this time, the cylinder piston extends out. When the flange end face A of the flood seal pressure head 5 contacts the upper end face B of the guide sleeve 4, the cylinder piston cannot continue to move downward, and the flood seal is pressed into place. At this time, the distance from the bottom end face C of the flood seal to the inner end face D of the plunger sleeve is 0.5mm. After the flood seal is pressed, the cylinder piston is reset, the left hand lifts the sliding shaft 11 upward, and the right hand inserts the lower end of the plunger 18 into the flood seal orifice. The left hand is released, and the sliding shaft 11 moves downward under the pressure of the spring 14, and the upper end of the plunger is sleeved in the hole of the bushing 6. At this time, the cylinder piston moves downward, and the sliding shaft 11 overcomes the pressure of the spring 14 and slides upward until the steel ball 13 at the upper end of the sliding shaft 11 hits the cushion block 15. The cylinder piston continues to move downward, gradually pressing the piston into the pan seal and plunger sleeve holes. When the flange end face A of the pan seal pressure head 5 contacts the upper end face B of the guide sleeve 4, the cylinder piston cannot move downward any further, and the plunger is pressed into place. At this time, the distance from the upper end face of the piston to the step face E of the plunger sleeve is 47 mm.

[0034] In summary, the device adopts a special structure and material design to ensure that sufficient pressure and stability can be provided during the press-fitting process, thereby ensuring that the pan seal and the plunger can be accurately and reliably pressed into the hole of the plunger sleeve. At the same time, the device also has good adaptability and flexibility, and can meet the assembly requirements of pump oil system components of different specifications and models.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pump oil system flood seal and plunger integrated press-fit device, characterized in that: It comprises a connecting block (16) fixedly mounted on the piston rod of the press, a sleeve (12) fixedly mounted on the lower end of the connecting block, a sliding shaft (11) slidably mounted in the sleeve, a spring (14) is arranged between the sliding shaft and the lower end of the sleeve, and in an initial state, the sliding shaft is located at the lowest position under the action of the spring; The lower end of the sliding shaft is provided with two-stage stepped holes, wherein a plunger pressure head (9) is installed in the small diameter hole, and a pan-seal pressure head (5) is installed in the large diameter hole, and the pan-seal pressure head is fixed by a tightening screw radially arranged on the lower end of the sliding shaft.

2. The integrated press-fit device for the flood seal and plunger of the pump oil system according to claim 1, characterized in that: A bushing (7) and a spacer sleeve (6) are arranged in sequence between the plunger pressure head and the flood seal pressure head in the stepped hole.

3. The integrated press-fit device for the flood seal and plunger of the pump oil system according to claim 1, characterized in that: A limiting sleeve (8) is screwed onto the outer sleeve to prevent the sliding shaft from falling.

4. The integrated press-fit device for the flood seal and plunger of the pump oil system according to claim 3, characterized in that: A locking nut (10) is provided on the outer sleeve above the limiting sleeve (8).

5. The integrated press-fit device for the flood seal and plunger of the pump oil system according to claim 1, characterized in that: A steel ball (13) is provided at the upper end of the sliding shaft (11), and a cushion block (15) is provided at the lower end of the connecting block corresponding to the position of the steel ball.

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