Urea pump press-fitting device

Abstract

The urea pump press-fitting device comprises a first press-fitting mechanism and a second press-fitting mechanism, the first press-fitting mechanism and the second press-fitting mechanism are arranged on a sliding assembly in a spaced mode and located above a first positioning seat, a press is arranged above the first press-fitting mechanism and the second press-fitting mechanism, and the first press-fitting mechanism and the second press-fitting mechanism selectively correspond to the press. The first press-fitting mechanism comprises a first pressing rod and a first pressing head arranged at the lower end of the first pressing rod, the first pressing head is matched with a first part, the second press-fitting mechanism comprises a second pressing rod and a second pressing head arranged at the lower end of the second pressing rod, and the second pressing head is matched with a second part or a third part. The first pressing rod and the second pressing rod are arranged in parallel and correspond to a telescopic rod of the pressing machine. Two press-fitting mechanisms are driven by one press, so that the use efficiency of the press can be improved, the number of the press is reduced, and the occupied space is reduced; and meanwhile, three parts can be press-fitted through the two press-fitting mechanisms, and the press-fitting efficiency of the press-fitting mechanisms is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of urea pump assembly equipment, and in particular to a urea pump press-fitting device. Background Art

[0002] A urea pump is a device used to transport urea solution within the exhaust treatment system of a diesel engine. Its primary function is to extract the urea solution from the urea tank and pump it into the nozzle to reduce nitrogen oxide (NOx) emissions. During urea pump processing, the corresponding accessories, including the urea pump filter element, throttle valve, and buffer block, must be assembled within the housing. Currently, part press-fitting typically involves one press-fitting device per workstation, with different parts being press-fitted at different workstations. However, this method requires a large number of workstations and presses, taking up considerable space. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problems of existing press-fitting devices that they occupy a large space and are relatively costly.

[0004] To achieve the purpose of the present invention, the present invention adopts the following technical solutions: A urea pump press-fitting device comprises a first press-fitting mechanism and a second press-fitting mechanism, the first and second press-fitting mechanisms being spaced apart on a sliding assembly and located above a first positioning seat, a press being provided above the first and second press-fitting mechanisms, the first and second press-fitting mechanisms selectively corresponding to the press, the first press-fitting mechanism comprising a first press rod and a first press head arranged at the lower end of the first press rod, the first press head being adapted to a first part, the second press-fitting mechanism comprising a second press rod and a second press head arranged at the lower end of the second press rod, the second press head being adapted to a second part or a third part, the first and second press rods being arranged in parallel and corresponding to a telescopic rod of the press.

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

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

[0007] In some embodiments, the first pressure head includes a positioning sleeve, which is slidably arranged on the first pressure rod. The lower end of the first pressure rod is provided with a suction port. When the suction port adsorbs the first part, the lower end of the positioning sleeve is located below the suction port and surrounds the circumference 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 in the groove, and the other end is in contact with the elastic ring.

[0009] In some embodiments, the second pressing head is provided with a positioning member and an elastic member connected to the positioning member. The positioning member is movably arranged along the axial direction and protrudes from the lower end surface of the second pressing head. When the second part is matched with the second pressing head, the positioning member is arranged corresponding to the eccentric hole of the second part. When the third part is matched with the second pressing head, the positioning member is pressed into the second pressing 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, a negative pressure channel is provided in the second pressure head, the negative pressure channel is connected to the lower end surface of the second pressure head, and the end surface of the second part or the third part is in contact with the lower end surface.

[0012] In some embodiments, a limiting rod is provided on the side of the second pressing head, and the limiting rod is arranged corresponding to the limiting hole of the second part.

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

[0014] The urea pump press-loading device provided by the present invention has the following advantages: The present invention uses one press to drive two press-fitting mechanisms, which can improve the use efficiency of the press, reduce the number of presses, and reduce space occupancy; at the same time, three parts can be press-fitted by two press-fitting mechanisms, thereby improving the press-fitting efficiency of the press-fitting mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a three-dimensional diagram of a urea pump press-fitting device provided in Example 1 of the present invention.

[0017] Figure 2 This is a schematic diagram of a urea pump press-fitting device provided in Example 1 of the present invention.

[0018] Figure 3 It is a cross-sectional view of a urea pump press-fitting device provided in Example 1 of the present invention.

[0019] Figure 4Schematic diagram of the eccentricity control mechanism provided in the first embodiment of the present invention.

[0020] Figure 5 Schematic diagram of the radial positioning pin provided in the first embodiment of the present invention.

[0021] Figure 6 Schematic diagram of the first pressure head provided in Example 1 of the present invention.

[0022] Figure 7 Schematic diagram of the second pressure head provided in the second embodiment of the present invention.

[0023] Figure 8 It is a three-dimensional diagram of the second pressing head provided in the second embodiment of the present invention.

[0024] Figure 9 It is a schematic diagram of the second part provided in the second embodiment of the present invention.

[0025] Figure 10 This is a schematic diagram of the second pressure head adsorbing the third part provided by the second embodiment of the present invention.

[0026] Attached photos 1. First press-fit mechanism; 2. Second press-fit mechanism; 3. Sliding assembly; 4. First positioning seat; 5. Press; 10. First part; 11. First pressing rod; 12. First pressing head; 13. First guide post; 14. Sliding plate; 15. Radial positioning pin; 16. Fixed seat; 17. Guide sleeve; 18. Fixing element; 19. Centering bushing; 20. Second part; 21. Second pressing rod; 22. Second pressing 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 portion;123. Annular hole;124. Positioning pin;125. Elastic ring;131. Clearance hole;201. Eccentric hole;202. Limiting hole;203. Center hole;221. Positioning piece;222. Elastic piece;223. Detection sensor;224. Negative pressure channel;225. Limiting rod;2211. Rod portion. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0028] In this embodiment, "several" and "plurality" refer to two or more. In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] <Example 1> like Figures 1 to 6As shown, this embodiment provides a urea pump press-fitting device, comprising a first press-fitting mechanism 1 and a second press-fitting mechanism 2. The first and second press-fitting mechanisms are spaced apart and positioned above a first positioning seat 4 on a sliding assembly 3. The first and second press-fitting mechanisms 2 are movable by the sliding assembly 3. The sliding assembly 3 in this embodiment is a transversely arranged linear module, enabling the first and second press-fitting mechanisms to move horizontally. The first positioning seat 4 is used to position a part 40 to be assembled, positioning it below the first and second press-fitting mechanisms, and pressing the part into the part 40 to be assembled. In this embodiment, the part 40 to be assembled is a urea pump housing. A press 5 is provided above the first and second press-fitting mechanisms. The first and second press-fitting mechanisms selectively correspond to the press 5, so that the first and second press-fitting mechanisms can be pressurized separately by a single press 5. The first press-fitting mechanism 1 comprises 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 fit a first part 10, and the first part 10 is pressed into the part 40 to be assembled by the first pressing head 12. The second pressing mechanism 2 includes a second pressing rod 21 and a second pressing head 22 arranged at the lower end of the second pressing rod 21. The second pressing head 22 is adapted to the second part 20 or the third part 30. The second pressing head 22 can selectively install the second part or the third part, so that the two pressing heads can install three parts. The first and second pressing rods are arranged in parallel and corresponding 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 movement of the first and second pressing rods is not affected when the telescopic rod 51 is retracted. When the first or second pressing rod is needed, the corresponding pressing rod is moved to the bottom of the telescopic rod 51 through the sliding assembly, and the pressing rod is pushed by extending the telescopic rod 51.

[0031] The above technical solution allows a single press to selectively drive two press-fitting 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 press-fitting mechanism 1 includes a first guide post 13 and an eccentric control mechanism disposed between the first guide post 13 and the first press rod 11. This mechanism allows the first press rod 11 and the first guide post 13 to be radially movable. When the first press rod 11 is pressed downward, and the first part 10 and the part 40 to be assembled are slightly misaligned, the eccentric control mechanism can radially offset the first part 10 and align it with the part 40 during installation. The eccentric control mechanism includes a sliding plate 14 and a radial locating pin 15. The sliding plate 14 is disposed below the first guide post 13 and connected to a clearance hole 131 below the first guide post 13 via the radial locating pin 15. The first press rod 11 is disposed below the sliding plate 14. When the first part 10 and the part 40 to be assembled are misaligned, the first press rod 11 presses downward, causing the first part 10 to collide with the part 40. The collision pressure causes the first press rod 11 to move radially. The radial locating pin 15 allows the first part 10 to move radially within the clearance hole 131, allowing the first part 10 to adjust its position. A fixed seat 16 is provided below the sliding plate 14. A guide sleeve 17 is provided in the fixed seat 16. The first pressure rod 11 is inserted into the guide sleeve 17. The fixed seat 16 is axially connected to the first guide column 13 via a fixing member 18, which is a bolt and is disposed within a centering bushing 19 and a matching washer 181. Through the above technical solution, the fixing seat 16, sliding plate 14, and matching washer 181 are fixedly suspended at the center of the flange surface of the first guide column 13 by the centering bushing 19 and fixing member 18; the radial locating pin 15 limits the range of motion of the sliding plate 14 within the clearance hole 131; when the first guide column 13 is pressed downwardly, the first part 10 contacts the part to be assembled 40, and the entire mechanism is adaptively centered.

[0033] Furthermore, the first pressure head 12 includes a positioning sleeve 121, which is slidably arranged on the first pressure rod 11 so that it can slide axially relative to the first pressure rod 11. The lower end of the first pressure rod 11 is provided with a suction port 111, which is connected to the negative pressure channel in the first pressure rod 11, so that it can absorb the first part through negative pressure. When the suction port 111 absorbs the first part 10, the lower end portion 122 of the positioning sleeve 121 is located below the suction port 111 and surrounds the circumference of the first part 10, thereby avoiding radial displacement of the first part 10 and making its positioning more accurate. When the first part 10 is pressed into the part to be assembled 40, when the first part 10 enters the mounting hole in the part to be assembled 40, the positioning sleeve 121 abuts against the end face of the mounting hole, causing it to move upward and separate from the first part 10.

[0034] Specifically, the first pressing rod 11 is provided with a groove 112 arranged along the axial direction. The positioning sleeve 121 is provided with an annular hole 123 surrounding the first pressing rod 11 and corresponding to the groove 112. The annular hole 123 is provided with a positioning pin 124, one end of which is pressed in the groove 112, and the other end is in abutment with an elastic ring 125, which limits the positioning pin 124. The positioning pin 124 can slide in the groove 112. When the positioning pin 124 slides down below the groove 112, the lower end 122 is located on the side of the first part 10; when the lower end 122 is subjected to pressure, the positioning sleeve 121 slides upward and is separated from the first part 10.

[0035] <Embodiment Two> In this embodiment, the same parts as in Embodiment One are given the same reference numerals, and the same textual description is omitted.

[0036] As shown in Figures 7 to 10 compared with Embodiment One, the urea pump press-fitting device provided in this embodiment also has the following different structural design: In this embodiment, the second pressing head 22 is provided with a positioning member 221 and an elastic member 222 connected with 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, and the elastic member 222 is a spring. The positioning member 221 is movably arranged along the axial direction and protrudes from the lower end surface of the second pressing head 22. When the second part 20 is connected with the second pressing head 22, the positioning member 221 is arranged corresponding to the eccentric hole 201 of the second part 20, so that when the second part 20 is adsorbed on the second pressing 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 connected with the second pressing head 22, the positioning member 221 is pressed into the second pressing 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 pressing head 22 under force, thereby avoiding interference with the third part 30.

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

[0038] Further, a detection sensor 223 is arranged above the positioning member 221 to detect the position of the positioning member 221. When the third part 30 pushes and moves the positioning member 221 upward, the detection sensor 223 moves in the direction of the detection sensor 223, and the detection sensor 223 obtains a signal. When the installation of the third part 30 is completed, the positioning member 221 is reset, and the detection sensor 223 cannot detect the signal, thereby identifying the installation state of the third part 30. The detection sensor 223 can be a proximity sensor or other existing sensor.

[0039] Furthermore, the second ram 22 is provided with a negative pressure channel 224, which communicates with the lower end surface of the second ram 22, with which the end surface of the second part 20 or the third part 30 abuts. When negative pressure is activated, the negative pressure channel 224 attracts the second or third part 20. A stopper rod 225 is provided on the side of the second ram 22. The stopper rod 225 is positioned corresponding to the stopper hole 202 of the second part 20, enabling it to position the second part 20. A central hole 203 is defined in the middle of the second part 20, with the stopper hole 202 and the eccentric hole 201 located around the central hole 203.

[0040] This embodiment uses one press to drive two press-fitting mechanisms, which can improve the use efficiency of the press, reduce the number of presses, and reduce space occupancy; at the same time, three types of parts can be press-fitted through two press-fitting mechanisms, thereby improving the press-fitting efficiency of the press-fitting mechanisms.

[0041] In the above-mentioned embodiments 1 and 2, during the working process, as the working environment changes, some technical implementation methods of embodiments 1 and 2 can be combined or replaced.

[0042] The technical principles of the present invention have been described above in conjunction with specific embodiments. However, it should be noted that the above description is only for the purpose of explaining the principles of the present invention and is not to be construed in any way as a specific limitation on the scope of protection of the present invention. Based on the explanations herein, those skilled in the art can conceive of other specific embodiments of the present invention or equivalent replacements without inventive effort, and all such replacements fall within the scope of protection of the present invention.

Claims

1. A urea pump press-fitting device, characterized in that: It includes a first pressing mechanism and a second pressing mechanism, the first and second pressing mechanisms are arranged at intervals on the sliding assembly and are 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 arranged at the lower end of the first pressing rod, the first pressing head is adapted to the first part, the second pressing mechanism includes a second pressing rod and a second pressing head arranged at the lower end of the second pressing rod, the second pressing head is adapted to the second part or the 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 column, and an eccentric control mechanism arranged between the first guide column and the first pressure rod, so that the first pressure rod and the first guide column are radially movable. The eccentric control mechanism includes a sliding plate and a radial positioning pin. The sliding plate is arranged below the first guide column and is connected to the gap hole below the first guide column through the radial positioning pin. The first pressure rod is arranged below the sliding plate.

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

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 arranged on the first pressure rod. The lower end of the first pressure rod is provided with a suction port. When the suction port adsorbs the first part, the lower end of the positioning sleeve is located below the suction port and surrounds the circumference 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, the positioning sleeve has an annular hole, a positioning pin is provided in the annular hole, one end of the positioning pin is pressed in 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 pressing head is provided with a positioning member and an elastic member connected to the positioning member. The positioning member is movably arranged along the axial direction and protrudes from the lower end surface of the second pressing head. When the second part is matched with the second pressing head, the positioning member is corresponding to the eccentric hole of the second part. When the third part is matched with the second pressing head, the positioning member is pressed into the second pressing head.

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

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

9. The urea pump press-loading device according to claim 8, characterized in that: A limiting rod is provided on the side of the second pressing head, and the limiting rod is arranged corresponding to the limiting hole of the second part.

10. The urea pump press-fitting device according to claim 9, characterized in that: A central hole is provided in the middle of the second part, and the limiting hole and the eccentric hole are located around the central hole.

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