Plunger press-fitting device with floating positioning sleeve

Abstract

The utility model discloses a plunger press-fitting device with a floating positioning sleeve, which comprises a pressure head fixedly arranged on a sliding rod of a press machine, and is characterized in that the floating positioning sleeve sliding up and down along the pressure head is sleeved on the outer side of the pressure head, a sliding limiting groove is arranged on the pressure head along the axial direction, and a limiting screw is arranged corresponding to the sliding limiting groove; annular grooves are formed in the positions, close to the upper end and the lower end of the floating positioning sleeve, of the floating positioning sleeve, elastic rings are sleeved with the annular grooves, at least three holes communicated with an inner cavity of the floating positioning sleeve are evenly distributed in the groove bottom of each annular groove in the circumferential direction, steel balls abutting against the outer wall of the pressing head are installed in the holes, and pressing blocks are installed in the holes in the outer sides of the steel balls. The outer side of the pressing block abuts against the inner wall of the elastic ring. A reset spring is arranged at the upper end of the floating positioning sleeve. Press fitting work of the plunger can be efficiently and accurately completed, and meanwhile the problems of scratching and damage possibly occurring in a traditional method are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pump oil system assembly, in particular to a plunger press-fitting device with a floating positioning sleeve. Background Art

[0002] In the traditional assembly process of pump oil system components, the plunger needs to be pressed into the holes of the pan seal and the plunger sleeve. In this process, the usual practice is to first place the end of the plunger in the hole at the upper end of the pan seal, insert the tail into a positioning sleeve, and then press the plunger into the predetermined position through the pressure head.

[0003] However, this method has a significant problem: if the positioning sleeve cannot float and there is a coaxial error between the positioning sleeve and the inner hole of the plunger sleeve, the plunger may be scratched when the plunger is pressed into the plunger sleeve hole. This scratch will not only affect the sliding property of the plunger in the plunger sleeve, but may also have an adverse effect on the performance of the plunger pair and even cause the product to become scrapped.

[0004] In addition, the traditional fixed positioning sleeve design also requires strict coaxiality between the floating positioning sleeve and the fixed positioning sleeve on the base plate, which undoubtedly increases the difficulty of manufacturing and installation and also increases the production cost.

[0005] Therefore, in order to solve the above problems, it is necessary to develop a plunger press-fitting device with a floating positioning sleeve to improve assembly efficiency, reduce scrap rate, and simplify the manufacturing and installation process. Utility Model Content

[0006] In view of the problems existing in the prior art, the utility model provides a plunger pressing device with a floating positioning sleeve, which improves assembly efficiency, reduces scrap rate and simplifies manufacturing and installation processes.

[0007] The utility model is implemented as follows: a plunger pressing device with a floating positioning sleeve comprises a pressing head fixedly mounted on a sliding rod of a press machine, characterized in that: a floating positioning sleeve sliding up and down along the pressing head is sleeved on the outer side of the pressing head, a sliding limit groove is provided on the pressing head in the axial direction, and a limit screw is provided corresponding to the sliding limit groove; an annular groove is provided on the floating positioning sleeve near the upper and lower ends of the floating positioning sleeve, an elastic ring is sleeved in the annular groove, at least three holes connected to the inner cavity of the floating positioning sleeve are evenly distributed in the circumferential direction on the groove bottom of the annular groove, a steel ball abutting against the outer wall of the pressing head is installed in the hole, a pressing block is installed in the outer hole of the steel ball, and the outer side of the pressing block abuts against the inner wall of the elastic ring; a reset spring is provided at the upper end of the floating positioning sleeve.

[0008] Preferably, the limit pin is screwed onto the floating positioning sleeve.

[0009] Preferably, a locking nut is threadedly mounted on the limit pin on the outer side of the floating positioning sleeve.

[0010] Preferably, the upper end surface of the floating positioning sleeve is provided with a countersunk hole for accommodating a reset spring.

[0011] Preferably, a plunger positioning step is provided at the lower end of the floating positioning sleeve.

[0012] Advantages and technical effects of the utility model: The beneficial effects of the present application are mainly reflected in the following aspects:

[0013] Improve press-fitting accuracy: Through the design of the floating locating sleeve, the plunger can be smoothly pressed in along the inner hole of the plunger sleeve during the press-fitting process, avoiding scratches or jamming caused by the coaxiality error that may exist in the traditional fixed locating sleeve, thereby significantly improving the press-fitting accuracy.

[0014] Protect the plunger and plunger sleeve: Since the floating positioning sleeve can float freely with the movement of the pressure head, it will not hinder the lateral movement of the plunger, effectively preventing the scratches on the plunger sleeve hole wall during the press-fitting process, protecting the plunger and plunger sleeve and extending their service life.

[0015] Improve assembly efficiency: The device of this application is reasonably designed and easy to operate, and can quickly complete the positioning and press-fitting of the plunger, greatly improving the assembly efficiency. At the same time, the design of the reset spring enables the floating positioning sleeve to automatically reset after each press-fitting, preparing for the next press-fitting, further improving work efficiency.

[0016] Reduced manufacturing and maintenance costs: The coaxiality requirements between the floating locating sleeve and the pressure head are reduced, which simplifies the manufacturing and installation process, thereby reducing manufacturing costs. In addition, maintenance costs are also reduced due to reduced damage and wear during the assembly process.

[0017] Enhance the stability and durability of the device: The combined design of steel balls, pressure blocks and elastic rings ensures stable contact and coaxiality between the floating positioning sleeve and the pressure head, enhancing the overall stability and durability of the device. At the same time, the design of the limit pin and loose nut also effectively prevents the floating positioning sleeve from falling off and loosening.

[0018] In summary, through innovative design, this application not only improves the accuracy and efficiency of plunger pressing, but also reduces manufacturing and maintenance costs, while enhancing the stability and durability of the device, bringing significant economic benefits and technological progress to related industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 yes Figure 1 Enlarged view of the middle X part;

[0021] Figure 3 yes Figure 1 Enlarged view of the middle Y part;

[0022] Figure 4 It is a schematic diagram of the floating positioning sleeve and the press-fit structure.

[0023] In the figure: 1. press machine; 1-1. sliding shaft; 2. reset spring; 3. pressing head; 3-1. sliding limit groove; 4. floating positioning sleeve; 4-1 countersunk hole; 4-2 hole; 4-3. ring groove; 4-4. plunger positioning step; 5. anti-loosening nut; 6. limit screw; 7. elastic ring; 8. steel ball; 9. pressing block; 10. plunger assembly; 10-1. spring lower seat; 10-2. plunger; 10-3. plunger spring; 10-4. pan-plug seal retaining ring; 10-5. pan-plug seal; 10-6. plunger sleeve; 11. plunger sleeve positioning base. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figures 1 to 4A plunger pressing device with a floating positioning sleeve comprises a pressing head 3 fixedly mounted on a sliding rod 1-1 of a press machine 1, and a floating positioning sleeve 4 is sleeved on the outer side of the pressing head 3 and slides up and down along the pressing head; this design allows the floating positioning sleeve to slide freely with the up and down movement of the pressing head 3, so that in the process of the plunger 10-2 being pressed into the plunger sleeve hole, the positioning sleeve 4 will not hinder the up and down movement of the plunger 10-2, ensuring that the plunger 10-2 can be smoothly pressed into the inner hole of the plunger sleeve 10-6, avoiding scratches on the plunger sleeve hole wall caused by the coaxiality error between the positioning sleeve 4 and the inner hole of the plunger sleeve 10-6. The pressure head 3 is provided with a sliding limit groove 3-1 along the axial direction, and a limit screw 6 is provided corresponding to the sliding limit groove. This feature limits the sliding range of the floating positioning sleeve 4 on the pressure head 3, ensuring that it will not fall off or move too much during the press-fitting process, thereby improving the stability and accuracy of the assembly; the floating positioning sleeve is provided with an annular groove 4-3 near the upper and lower ends of the floating positioning sleeve 4, and an elastic ring 7 is installed in the annular groove. The setting of the elastic ring increases the friction between the floating positioning sleeve 4 and the pressure head 3, so that the floating pan-plug sealing ring is more stable when sliding with the pressure head 3, and also helps to reduce vibration and noise during the assembly process; and when not working, it is ensured that the floating positioning sleeve 4 and the pressure head 3 maintain a certain coaxial relationship. At least three holes 4-2 connected to the inner cavity of the floating positioning sleeve are evenly distributed along the circumferential direction on the bottom of the annular groove 4-3. A steel ball 8 abutting against the outer wall of the pressure head 4 is installed in the hole 4-2, and a pressure block 9 is installed in the outer hole of the steel ball 8. The outer side of the pressure block 9 abuts against the inner wall of the elastic ring 7. This design makes the floating positioning sleeve 4 have a certain elasticity in the radial direction through the cooperation of the steel ball 8 and the pressure block 9, which can better adapt to the shape change of the outer wall of the pressure head 4, and further enhance the stability and assembly accuracy between the floating positioning sleeve 4 and the pressure head 3. A reset spring 2 is provided at the upper end of the floating positioning sleeve 4. The function of the reset spring 2 is to help the floating positioning sleeve 4 quickly return to the initial position after the press-fitting is completed, thereby improving the assembly efficiency and also ensuring the position accuracy of the floating positioning sleeve 4 before each press-fitting.

[0026] Preferably, the limit screw 6 is mounted on the floating positioning sleeve 4. This connection method is both firm and easy to disassemble and repair, thereby improving the convenience of use and maintainability of the device.

[0027] Preferably, a locking nut 5 is installed on the limit screw 6 on the outside of the floating positioning sleeve 4. The locking nut 5 can prevent the limit screw from loosening due to vibration or long-term use, further enhancing the stability and durability of the device.

[0028] Preferably, the upper end surface of the floating positioning sleeve 4 is provided with a countersunk hole 4-1 for placing the reset spring 2. The design of the countersunk hole 4-1 enables the reset spring to be placed on the floating positioning sleeve 4 more firmly, avoiding displacement or falling off of the reset spring 2 during assembly.

[0029] Preferably, a plunger positioning step 4-4 is provided at the lower end of the floating positioning sleeve 4, and the plunger positioning step 4-4 provides initial positioning for the plunger, ensuring the position accuracy of the plunger during the press-fitting process, thereby improving the assembly quality.

[0030] The method for using the plunger press-fitting device with a floating positioning sleeve of the utility model comprises the following steps:

[0031] Preparation stage:

[0032] Make sure the press is in the closed state and fix the pressing head 3 on the sliding rod 1-1 of the press.

[0033] Check whether the floating positioning sleeve 4 is sleeved on the outside of the pressure head 3 and can slide freely up and down along the pressure head 3.

[0034] Make sure that the limit screw 6 is correctly installed in the corresponding sliding limit groove 3 - 1 to prevent the floating positioning sleeve 4 from falling off.

[0035] Check whether the elastic ring, steel ball 8 and pressure block 9 in the annular groove 4-3 are properly installed to ensure the coaxiality of the floating positioning sleeve 4 and the pressure head 3.

[0036] A return spring 2 is placed at the upper end of the floating positioning sleeve to ensure that the spring is in a compressed state so that the floating positioning sleeve 4 is always kept in the lowest position.

[0037] Install the plunger assembly: Place the assembled plunger assembly 10 on the plunger sleeve positioning bottom 11. The plunger assembly 10 includes 10-1, a spring lower seat; 10-3, a plunger spring; 10-4, a pan-seal retaining ring; 10-5, a pan-seal; and 10-6, a plunger sleeve.

[0038] Lift the floating positioning sleeve 4 with your left hand, pick up the plunger 10-2 with your right hand, and insert the large end of the plunger into the orifice of the flood seal 10-5.

[0039] Align the plunger 10-2 to ensure that it is in the correct position.

[0040] Release the floating positioning sleeve 4 with your left hand, so that its lower end falls naturally and presses on the tail of the plunger 10-2 to complete the initial positioning of the plunger 10-2.

[0041] Press-fit plunger:

[0042] Start the press so that the sliding shaft 1-1 drives the pressing head 3 to move downward.

[0043] During the downward movement of the ram, the floating positioning sleeve 4 will move upward relative to the ram 3 to maintain contact with the tail of the plunger 10 - 2 .

[0044] When the small end of the pressure head 3 contacts the tail of the plunger 10-2, the pressure head continues to move downward to start pressing the plunger 10-2 into the holes of the flood seal 10-5 and the plunger sleeve 10-6.

[0045] During the press-fitting process, due to the design of the floating positioning sleeve 4, it can freely move up and down along the pressing head 3, thereby preventing the plunger 10-2 from scratching the hole wall of the plunger sleeve 10-6.

[0046] Complete press fitting:

[0047] When the plunger 10-2 is completely pressed into the holes of the pan seal 10-5 and the plunger sleeve 10-6, the press is closed.

[0048] The floating positioning sleeve 4 will automatically return to its initial position under the action of the return spring 2, preparing for the next press-fitting.

[0049] Through the above steps, the press-fitting of the plunger can be completed efficiently and accurately, while avoiding the scratching and damage problems that may occur in the traditional method.

[0050] 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 plunger press-fitting device with a floating positioning sleeve, comprising a pressing head fixedly mounted on a sliding rod of a press, characterized in that: The outer side of the pressure head is provided with a floating positioning sleeve which slides up and down along the pressure head, and a sliding limit groove is provided on the pressure head in the axial direction, and a limit screw is provided corresponding to the sliding limit groove; an annular groove is provided on the floating positioning sleeve near the upper and lower ends of the floating positioning sleeve, and an elastic ring is provided in the annular groove, and at least three holes which are connected to the inner cavity of the floating positioning sleeve are evenly distributed along the circumferential direction on the bottom of the annular groove, a steel ball which abuts against the outer wall of the pressure head is installed in the hole, and a pressure block is installed in the outer hole of the steel ball, and the outer side of the pressure block abuts against the inner wall of the elastic ring; a reset spring is provided at the upper end of the floating positioning sleeve.

2. The plunger press-fitting device with a floating positioning sleeve according to claim 1, characterized in that: The limit screw is arranged on the floating positioning sleeve.

3. The plunger press-fitting device with a floating positioning sleeve according to claim 1, characterized in that: A locking nut is arranged on the limit screw on the outer side of the floating positioning sleeve.

4. The plunger press-fitting device with a floating positioning sleeve according to claim 1, characterized in that: The upper end surface of the floating positioning sleeve is provided with a countersunk hole for accommodating a reset spring.

5. The plunger press-fitting device with a floating positioning sleeve according to claim 1, characterized in that: The lower end of the floating positioning sleeve is provided with a plunger positioning step.

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