Urea pump press-fitting device

Abstract

The utility model discloses a kind of urea pump press fitting device, including first press fitting mechanism and second press fitting mechanism, first, second press fitting mechanism is arranged on sliding assembly with interval and located above first locating seat, press is equipped above first, second press fitting mechanism, first, second press fitting mechanism selectively with press corresponding, the first press fitting mechanism includes first pressure lever, and the first pressure head of first pressure lever lower end, first pressure head is adapted with first part, second press fitting mechanism includes second pressure lever, and the second pressure head of second pressure lever lower end, second pressure head is adapted with second part or third part, first, second pressure lever is parallelly arranged and with the telescopic rod of press corresponding arrangement.The utility model drives two press fitting mechanisms with a press, can improve the use efficiency of press, reduce press quantity, reduce space occupancy;Meanwhile, three kinds of parts can be press fitted by two press fitting mechanisms, improve the press fitting efficiency of press fitting mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of urea pump assembly equipment, and in particular to a urea pump press-fitting device. Background Technology

[0002] A urea pump is a device used in diesel engine exhaust aftertreatment systems to deliver urea solution. Its main function is to draw urea solution from the urea tank and pump it into the nozzle to reduce nitrogen oxide (NOx) emissions. During urea pump manufacturing, corresponding components need to be assembled inside the housing, including the urea pump filter element, throttle valve, and buffer block. Currently, parts press-fitting typically involves one press-fitting device per station, with different parts press-fitted at different stations. However, this method requires a large number of stations and presses, and occupies a significant amount of space. Utility Model Content

[0003] The purpose of this invention is to solve the technical problems of existing pressing devices having large space requirements and high costs.

[0004] To achieve the objectives of this utility model, the following technical solution is adopted: A urea pump pressing device includes a first pressing mechanism and a second pressing mechanism. The first and second pressing mechanisms are spaced apart on a sliding assembly and located above a first positioning seat. A press is provided above the first and second pressing mechanisms. The first and second pressing mechanisms selectively correspond to the press. The first pressing mechanism includes a first pressing rod and a first pressing head disposed at the lower end of the first pressing rod. The first pressing head is adapted to a first part. The second pressing mechanism includes a second pressing rod and a second pressing head disposed at the lower end of the second pressing rod. The second pressing head is adapted to a second part or a third part. The first and second pressing rods are arranged in parallel and correspond to the telescopic rod of the press.

[0005] In some embodiments, the first pressing mechanism includes a first guide post and an eccentric control mechanism disposed between the first guide post and the first pressing rod, such that the first pressing rod and the first guide post are radially movably connected. The eccentric control mechanism includes a sliding plate and a radial positioning pin. The sliding plate is disposed below the first guide post and is connected to a gap hole below the first guide post through the radial positioning pin. The first pressing rod is disposed below the sliding plate.

[0006] In some embodiments, a fixed seat is provided below the sliding plate, a guide sleeve is provided in the fixed seat, a first pressure rod passes through the guide sleeve, and the fixed seat is axially connected to the first guide post through a fixing member.

[0007] In some embodiments, the first pressure head includes a positioning sleeve, which is slidably disposed on the first pressure rod. The lower end of the first pressure rod is provided with an adsorption port. When the adsorption port adsorbs the first part, the lower end of the positioning sleeve is located below the adsorption port and surrounds the periphery of the first part.

[0008] In some embodiments, the outer wall of the first pressure rod is provided with a groove, the positioning sleeve has an annular hole, a positioning pin is provided in the annular hole, one end of the positioning pin is pressed against the groove, and the other end is in contact with the elastic ring.

[0009] In some embodiments, the second pressure head is provided with a positioning member and an elastic member connected to the positioning member. The positioning member is axially movable and protrudes from the lower end face of the second pressure head. When the second part is mated with the second pressure head, the positioning member is correspondingly arranged with the eccentric hole of the second part. When the third part is mated with the second pressure head, the positioning member is pressed into the second pressure head.

[0010] In some embodiments, a detection sensor is provided above the positioning member to detect the position of the positioning member.

[0011] In some embodiments, the second pressure head is provided with a negative pressure channel, which is connected to the lower end face of the second pressure head, and the end face of the second or third part is in contact with the lower end face.

[0012] In some embodiments, a limiting rod is provided on the side of the second pressure head, and the limiting rod is correspondingly provided with a limiting hole in the second part.

[0013] In some embodiments, the second part has a central hole in the middle, and a limiting hole and an eccentric hole are located around the central hole.

[0014] The urea pump press-fitting device provided by this utility model has the following advantages: This invention uses one press to drive two pressing mechanisms, which can improve the efficiency of the press, reduce the number of presses, and reduce space occupation; at the same time, it can press three kinds of parts through two pressing mechanisms, thereby improving the pressing efficiency of the pressing mechanism. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of a urea pump press-fitting device provided in Embodiment 1 of this utility model.

[0017] Figure 2 This is a schematic diagram of a urea pump press-fitting device provided in Embodiment 1 of this utility model.

[0018] Figure 3 This is a cross-sectional view of a urea pump press-fitting device provided in Embodiment 1 of this utility model.

[0019] Figure 4 This is a schematic diagram of the eccentric control mechanism provided in Embodiment 1 of this utility model.

[0020] Figure 5 This is a schematic diagram of the radial positioning pin provided in Embodiment 1 of this utility model.

[0021] Figure 6 This is a schematic diagram of the first pressure head provided in Embodiment 1 of this utility model.

[0022] Figure 7 This is a schematic diagram of the second pressure head provided in Embodiment 2 of this utility model.

[0023] Figure 8 This is a perspective view of the second pressure head provided in Embodiment 2 of this utility model.

[0024] Figure 9 This is a schematic diagram of the second part provided in Embodiment 2 of this utility model.

[0025] Figure 10 This is a schematic diagram of the second pressure head adsorbing the third part according to Embodiment 2 of this utility model.

[0026] Attached Figure 1. First pressing mechanism; 2. Second pressing mechanism; 3. Sliding assembly; 4. First positioning seat; 5. Press; 10. First part; 11. First pressure rod; 12. First pressure head; 13. First guide post; 14. Sliding plate; 15. Radial positioning pin; 16. Fixed seat; 17. Guide sleeve; 18. Fixing component; 19. Centering bushing; 20. Second part; 21. Second pressure rod; 22. Second pressure head; 30. Third part; 40. Parts to be assembled. ; 51. Telescopic rod; 81. Grinding washer; 111. Adsorption port; 112. Groove; 121. Positioning sleeve; 122. Lower end; 123. Annular hole; 124. Positioning pin; 125. Elastic ring; 131. Gap hole; 201. Eccentric hole; 202. Limiting hole; 203. Center hole; 221. Positioning component; 222. Elastic component; 223. Detection sensor; 224. Negative pressure channel; 225. Limiting rod; 2211. Rod section. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0028] In this embodiment, "several" and "more than" refer to two or more. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] <Example 1> like Figures 1 to 6As shown, this embodiment provides a urea pump pressing device, including a first pressing mechanism 1 and a second pressing mechanism 2. The first and second pressing mechanisms are spaced apart on a sliding assembly 3 and located above a first positioning seat 4. The first and second pressing mechanisms 2 can move through the sliding assembly 3. In this embodiment, the sliding assembly 3 is a horizontally arranged linear module, allowing the first and second pressing mechanisms to move horizontally. The first positioning seat 4 is used to position the part to be installed 40, placing it below the first and second pressing mechanisms, and pressing the part into the part to be installed 40. In this embodiment, the part to be installed 40 is a urea pump housing. A press 5 is provided above the first and second pressing mechanisms. The first and second pressing mechanisms selectively correspond to the press 5, so that the first and second pressing mechanisms can be pressed by one press 5 respectively. The first pressing mechanism 1 includes a first pressing rod 11 and a first pressing head 12 disposed at the lower end of the first pressing rod 11. The first pressing head 12 is adapted to the first part 10, and the first part 10 is pressed into the part to be installed 40 through the first pressing head 12. The second pressing mechanism 2 includes a second pressing rod 21 and a second pressing head 22 disposed at the lower end of the second pressing rod 21. The second pressing head 22 is adapted to either the second part 20 or the third part 30. The second pressing head 22 can selectively install either the second part or the third part, allowing the two pressing heads to install three types of parts. The first and second pressing rods are arranged in parallel and correspond to the telescopic rod 51 of the press 5. The first and second pressing rods are separated from the telescopic rod 51, so that the retraction of the telescopic rod 51 does not affect the movement of the first and second pressing rods. When the first or second pressing rod is needed, the corresponding pressing rod is moved below the telescopic rod 51 via a sliding assembly, and the pressing rod is pushed out by the extension of the telescopic rod 51.

[0031] The above technical solution enables a single press to selectively drive two sets of pressing mechanisms, reducing costs and saving equipment space. The two press heads can accommodate three types of parts, improving assembly efficiency. In this embodiment, the first part 10 is a throttle valve, the second part 20 is a buffer block, and the third part 30 is a filter element.

[0032] Specifically, the first pressing mechanism 1 includes a first guide post 13 and an eccentric control mechanism disposed between the first guide post 13 and the first pressing rod 11, which radially connects the first pressing rod 11 and the first guide post 13. When the first pressing rod 11 presses down, if the position of the first part 10 deviates slightly from that of the part to be installed 40, the eccentric control mechanism can cause the first part 10 to radially shift and align with the part to be installed 40 during installation. The eccentric control mechanism includes a sliding plate 14 and a radial positioning pin 15. The sliding plate 14 is disposed below the first guide post 13 and connected to the gap hole 131 below the first guide post 13 through the radial positioning pin 15. The first pressing rod 11 is disposed below the sliding plate 14. When the first part 10 is not aligned with the part to be installed 40, when the first pressing rod 11 presses down, the first part 10 collides with the part to be installed 40. The collision pressure causes the first pressing rod 11 to move radially, and the radial positioning pin 15 moves radially within the gap hole 131, allowing the first part 10 to adjust its position. A fixed seat 16 is provided below the sliding plate 14, and a guide sleeve 17 is provided in the fixed seat 16. The first pressure rod 11 passes through the guide sleeve 17. The fixed seat 16 is axially connected to the first guide post 13 through a fixing member 18, which is a bolt. The fixing member 18 is set in the centering bushing 19 and the grinding washer 181. Through the above technical solution, the fixed seat 16, the sliding plate 14, and the grinding washer 181 are fixedly suspended at the center of the flange surface of the first guide post 13 by the centering bushing 19 and the fixing member 18; the radial positioning pin 15 restricts the range of motion of the sliding plate 14 in the gap hole 131; when the first guide post 13 is pressed down by force, the first part 10 and the part to be installed 40 come into contact, and the entire mechanism self-centers.

[0033] Furthermore, the first pressure head 12 includes a positioning sleeve 121, which is slidably disposed on the first pressure rod 11, allowing it to slide axially relative to the first pressure rod 11. The lower end of the first pressure rod 11 is provided with an adsorption port 111, which communicates with a negative pressure channel within the first pressure rod 11, enabling it to adsorb the first part through negative pressure. When the adsorption port 111 adsorbs the first part 10, the lower end 122 of the positioning sleeve 121 is located below the adsorption port 111 and surrounds the periphery of the first part 10, thereby preventing radial displacement of the first part 10 and ensuring more accurate positioning. When the first part 10 is pressed into the assembly 40, and the first part 10 enters the mounting hole in the assembly 40, the positioning sleeve 121 abuts against the end face of the mounting hole, causing it to move upwards and detach from the first part 10.

[0034] Specifically, the outer wall of the first pressure rod 11 is provided with a groove 112, which is arranged axially. The positioning sleeve 121 has an annular hole 123, which surrounds the first pressure rod 11 and corresponds to the groove 112. A positioning pin 124 is provided in the annular hole 123. One end of the positioning pin 124 abuts against the groove 112, and the other end abuts against the elastic ring 125. The elastic ring 125 limits the positioning pin 124, allowing it to slide within the groove 112. When the positioning pin 124 slides down to below the groove 112, its lower end 122 is located around the first part 10. When the lower end 122 is subjected to pressure, the positioning sleeve 121 slides upward and disengages from the first part 10.

[0035] <Example 2> In this embodiment, the parts that are the same as in Embodiment 1 are given the same reference numerals, and the same text descriptions are omitted.

[0036] like Figures 7 to 10 As shown, compared to Embodiment 1, the urea pump press-fitting device provided in this embodiment has the following structural design differences: In this embodiment, the second pressure head 22 is provided with a positioning member 221 and an elastic member 222 connected to the positioning member 221. The positioning member 221 has a rod portion 2211, and the elastic member 222 is sleeved on the rod portion 2211. The elastic member 222 is a spring. The positioning member 221 is axially movable and protrudes from the lower end face of the second pressure head 22. When the second part 20 is mated with the second pressure head 22, the positioning member 221 is correspondingly arranged with the eccentric hole 201 of the second part 20, so that when the second part 20 is adsorbed on the second pressure head 22, the positioning member 221 can be inserted into the eccentric hole 201 to position the second part 20. When the third part 30 is mated with the second pressure head 22, the positioning member 221 is pressed into the second pressure head 22. Since the third part 30 does not have an eccentric hole corresponding to the positioning member 221, the positioning member 221 can be pressed into the second pressure head 22 under force, avoiding interference with the third part 30.

[0037] The above technical solution enables the second pressure head 22 to be adapted to the second part 20 and the third part 30, thereby improving the utilization rate of the second pressure head 22.

[0038] Furthermore, a detection sensor 223 is provided above the positioning member 221 to detect the position of the positioning member 221. When the third part 30 pushes the positioning member 221 upward, it moves towards the detection sensor 223, and the detection sensor 223 receives a signal. After the third part 30 is installed, the positioning member 221 resets, and the detection sensor 223 no longer detects a signal, thereby identifying the installation status of the third part 30. The detection sensor 223 can be an existing sensor such as a proximity sensor.

[0039] Furthermore, the second pressure head 22 is provided with a negative pressure channel 224, which communicates with the lower end face of the second pressure head 22, and the end face of the second part 20 or the third part 30 is in contact with the lower end face. When the negative pressure is activated, the negative pressure channel 224 sucks the second or third part in place by the negative pressure. A limiting rod 225 is provided on the side of the second pressure head 22, which is correspondingly provided with the limiting hole 202 of the second part 20, so that it can position the second part 20. A central hole 203 is provided in the middle of the second part 20, and the limiting hole 202 and the eccentric hole 201 are located around the central hole 203.

[0040] This embodiment uses one press to drive two pressing mechanisms, which can improve the efficiency of the press, reduce the number of presses, and reduce space occupation; at the same time, it can press three kinds of parts through two pressing mechanisms, thereby improving the pressing efficiency of the pressing mechanism.

[0041] In the above embodiments one and two, during the working process, depending on the different working environments, some of the technical implementation methods of embodiments one and two can be combined or replaced.

[0042] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A urea pump press-fitting device, characterized in that, The device includes a first pressing mechanism and a second pressing mechanism. The first and second pressing mechanisms are spaced apart on the sliding assembly and located above the first positioning seat. A press is provided above the first and second pressing mechanisms. The first and second pressing mechanisms selectively correspond to the press. The first pressing mechanism includes a first pressing rod and a first pressing head located at the lower end of the first pressing rod. The first pressing head is adapted to a first part. The second pressing mechanism includes a second pressing rod and a second pressing head located at the lower end of the second pressing rod. The second pressing head is adapted to a second part or a third part. The first and second pressing rods are arranged in parallel and correspond to the telescopic rod of the press.

2. The urea pump press-fitting device according to claim 1, characterized in that, The first pressing mechanism includes a first guide post and an eccentric control mechanism disposed between the first guide post and the first pressing rod, which enables the first pressing rod and the first guide post to be radially movably connected. The eccentric control mechanism includes a sliding plate and a radial positioning pin. The sliding plate is disposed below the first guide post and is connected to the gap hole below the first guide post through the radial positioning pin. The first pressing rod is disposed below the sliding plate.

3. The urea pump press-fitting device according to claim 2, characterized in that, A fixed seat is provided below the sliding plate, and a guide sleeve is provided in the fixed seat. The first pressure rod passes through the guide sleeve, and the fixed seat is axially connected to the first guide post through a fixing member.

4. The urea pump press-fitting device according to claim 1, characterized in that, The first pressure head includes a positioning sleeve, which is slidably disposed on the first pressure rod. The lower end of the first pressure rod is provided with an adsorption port. When the adsorption port adsorbs the first part, the lower end of the positioning sleeve is located below the adsorption port and surrounds the periphery of the first part.

5. The urea pump press-fitting device according to claim 4, characterized in that, The outer wall of the first pressure rod is provided with a groove, and the positioning sleeve has an annular hole. A positioning pin is provided in the annular hole, one end of which is pressed against the groove, and the other end is in contact with the elastic ring.

6. The urea pump press-fitting device according to claim 1, characterized in that, The second pressure head is provided with a positioning element and an elastic element connected to the positioning element. The positioning element is axially movable and protrudes from the lower end face of the second pressure head. When the second part is mated with the second pressure head, the positioning element is correspondingly set with the eccentric hole of the second part. When the third part is mated with the second pressure head, the positioning element is pressed into the second pressure head.

7. The urea pump press-fitting device according to claim 6, characterized in that, A detection sensor is provided above the positioning component to detect its position.

8. The urea pump press-fitting device according to claim 7, characterized in that, The second pressure head is provided with a negative pressure channel, which is connected to the lower end face of the second pressure head, and the end face of the second or third part is in contact with the lower end face.

9. The urea pump press-fitting device according to claim 8, characterized in that, The second pressure head is provided with a limiting rod on its side, and the limiting rod is set to correspond to the limiting hole of the second part.

10. The urea pump press-fitting device according to claim 9, characterized in that, The second part has a central hole in the middle, and a limiting hole and an eccentric hole are located around the central hole.

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