Clear water tank assembly shaft core pressing jig

Abstract

The utility model relates to the field of water tank assembly, in particular to a clear water tank assembly shaft core press fit jig, a clear water tank comprises a tank body and a tank cover, the tank body and the tank cover are hinged, and the clear water tank assembly shaft core press fit jig comprises a jig plate, a pressing plate and a pressing plate, when the clear water tank is placed on the jig plate, the axis where the hinged rotating shaft of the tank body and the tank cover is located is parallel to the first direction, and the shaft core is located in the limiting groove. And the pressing assembly is connected with the jig plate through a first support and comprises a first driving device and an ejector pin connected with the first driving device, and the ejector pin is driven by the first driving device to move in the limiting groove in the first direction and pushes the shaft core to be connected with the clear water tank. The whole machine is compact in structure, the production efficiency is greatly improved through automatic operation of automatic positioning and pressing, the problem of low precision caused by manual operation is avoided, and meanwhile the labor cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water tank assembly technology, and in particular to a pressing fixture for the shaft core of a clean water tank assembly. Background Technology

[0002] As the core functional unit of water storage equipment, the quality of the hinged assembly of the tank body and lid directly affects the overall sealing performance and structural reliability of the equipment. Current mainstream hinged structures borrow from the mechanical principle of hinges, with cylindrical connecting holes of strictly dimensional matching opened at the edge of the tank body and the corresponding lid location, achieving a through-type mechanical connection through a metal or engineering plastic shaft. While this design allows for repeated opening and closing of the lid, it places extremely high demands on the precision of the manufacturing process during actual assembly.

[0003] Traditional assembly processes rely entirely on manual operation. Technicians must manually adjust the spatial posture of the cover, visually aligning the axes of the connecting holes in the cover with those in the cabinet, and then forcibly insert the shaft core into the hole using vertical pressure. This process has several systemic defects: First, the accuracy of manual alignment is limited by the operator's experience and visual errors, making it difficult to consistently ensure the coaxiality of the hinge holes, leading to misalignment and friction during shaft core insertion. Second, the lack of a real-time correction mechanism during assembly means that even slight misalignment can cause scratches on the shaft core surface or plastic deformation of the hole wall if forced in. Furthermore, uneven manual force application can lead to stress concentration in localized areas of the shaft core, inducing microcrack propagation under long-term cyclic loading. More seriously, if the shaft core is not fully pressed into the designed position, mechanical vibrations during equipment operation will cause axial movement of the hinge pair. This not only results in insufficient compression of the sealing strip when the cover closes, leading to leakage, but may also cause fatigue failure of the hinge structure, potentially causing the entire cover to detach, resulting in a safety hazard. Therefore, how to assemble the tank body and lid of the clean water tank with high efficiency and high precision is a problem that needs to be considered by those skilled in the art. Utility Model Content

[0004] The purpose of this utility model is to provide a pressing fixture for the shaft core of a clean water tank assembly. The fixture plate automatically positions the clean water tank, the limiting plate precisely aligns the connection between the tank body and the tank cover, and the pressing assembly automatically presses against the shaft core to complete the accurate installation of the shaft core. This solves the problems of low assembly efficiency and inability to guarantee accuracy in the existing clean water tank assembly technology.

[0005] The technical solution of this utility model is: a shaft core pressing fixture for a clean water tank assembly, wherein the clean water tank includes a tank body and a tank cover, the tank body and the tank cover being hinged together by a shaft core, comprising:

[0006] A fixture plate is set on the machine platform and has a limiting groove along the first direction; when the clean water tank is placed on the fixture plate, the axis of rotation of the hinge shaft of the tank body and the tank cover is parallel to the first direction, and the shaft core is in the limiting groove.

[0007] The pressing assembly is connected to the fixture plate via a first bracket and includes a first driving device and a pin connected to the first driving device. The pin moves in the limiting groove and along a first direction under the drive of the first driving device, and pushes the shaft core to connect with the clean water tank.

[0008] Preferably, the fixture plate is inclined and further includes a first contour plate, a second contour plate and a limiting plate, wherein the limiting plate is connected to the fixture plate through a second driving device with the driving direction being the second direction;

[0009] When the clean water tank is placed on the fixture plate, the tank body is positioned by the first and second contour plates, and the tank cover is fixed to the tank body by the limiting plate driven by the second driving device.

[0010] Preferably, the lid is provided with a handle, and the limiting plate is provided with a positioning groove, which is connected to the handle.

[0011] Preferably, the pressing assembly further includes a guide block connected to the fixture plate, the guide block having a through guide hole, and the ejector pin passing through the guide hole and connecting to the limiting groove.

[0012] Preferably, the ejector pin is connected to the first driving device via a mounting head;

[0013] The mounting head is provided with a T-shaped slot, which is connected to the countersunk head on the ejector pin.

[0014] Preferably, there are two pressing components, which are symmetrically arranged on both sides of the fixture plate in a first direction.

[0015] Preferably, a sensor is provided on the fixture plate, and the sensor can sense the clean water tank on the fixture plate.

[0016] Preferably, the fixture plate is provided with a relief groove, which is connected to the limiting groove;

[0017] When the water tank is placed on the fixture plate, the hinge joint between the tank cover and the tank body is in the clearance groove, and the shaft core is in the limiting groove.

[0018] Preferably, the machine is equipped with an operation panel.

[0019] Preferably, the first driving device is a cylinder; the second driving device is a cylinder.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] (1) The machine has a compact structure. Through the automated operation of automatic positioning and pressing, the production efficiency is greatly improved, and the problem of low precision caused by manual operation is avoided. At the same time, the labor cost is reduced.

[0022] (2) By setting up the fixture, the water tank can be automatically positioned when placed in the fixture; at the same time, the limit plate presses against the cover, which can prevent the cover from shifting during the assembly of the shaft core, and can also make the cover and the first and second connecting holes of the tank body accurately positioned; the first drive devices on both sides drive the shaft core to assemble simultaneously, ensuring uniform force, and thus making the assembly more accurate. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic diagram of the shaft core pressing fixture structure when placing the water tank according to the present invention;

[0025] Figure 2 This is a schematic diagram of the shaft core pressing fixture structure of the present invention;

[0026] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0027] Figure 4 This is a schematic diagram of the structure of the clean water tank described in this utility model. Figure 1 ;

[0028] Figure 5 This is a schematic diagram of the structure of the clean water tank described in this utility model. Figure 2 .

[0029] Among them: clean water tank 1, tank cover 11, first connecting hole 111, handle 112, tank body 12, second connecting hole 121, shaft core 13;

[0030] First direction S1, second direction S2;

[0031] Fixture plate 2, limiting groove 21, first contour plate 22, second contour plate 23, limiting plate 24, positioning groove 241, second driving device 25, clearance groove 26, guide block 27, guide hole 271, sensor 28.

[0032] Pressing assembly 3, first bracket 31, first drive device 32, ejector pin 33, countersunk head 331, mounting head 34, slot 341;

[0033] Machine 4, operation panel 41, drive button 42. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0035] The following detailed description, in conjunction with specific embodiments, further illustrates the content of this utility model:

[0036] like Figures 1-5 As shown, this utility model is applied to the assembly of a water tank 1's cover 11 and body 12. The cover 11 has a first connecting hole 111, and the body 12 has a second connecting hole 121. The axes of the first connecting hole 111 and the second connecting hole 121 coincide. There are two first connecting holes 111 located on either side of the second connecting hole 121. Shaft cores 13 are inserted into the first connecting holes 111 on both sides and connected to the second connecting holes 121 from both sides. The cover 11 rotates relative to the body 12 in either the forward or reverse direction along the shaft cores 13 to open or close the cover 11. In this embodiment, the water tank 1 requires two shaft cores 13, inserted symmetrically from both sides. During assembly, the cover 11 and body 12 are pre-assembled. After pre-assembly, they are basically assembled to the preset position, but there is still some error. During pre-assembly, the two shaft cores 13 are placed into the first connecting holes 111 from both sides (e.g., ...). Figure 4 and Figure 5 (As shown). The pre-assembly process can be carried out manually or by automated equipment. Simply snap the tank body 12 and the tank cover 11 together without tightening or pressing. Insert the shaft core 13 into the first connecting hole 111 to ensure it does not fall off. The operation is relatively simple and can be efficient even when done manually. After pre-assembly, the tank body 12 can be placed on the fixture plate. The tank body 12 is automatically positioned. At this time, the part of the shaft core 13 that is not inserted into the first connecting hole 111 is in the limiting groove. Then, the second drive device drives the limiting plate to press against the tank cover 11, so that the tank cover 11 and the tank body 12 are precisely aligned, that is, the connecting holes on the tank cover 11 and the tank body 12 are precisely aligned. The pressing components 3 on both sides simultaneously drive the shaft core 13 to approach the hinge from both sides and insert it into the second connecting hole 121, completing the assembly of the shaft core 13 of the clean water tank 1.

[0037] In this embodiment, for ease of explanation, as follows: Figure 1 As shown, on the plane containing the upper surface of the fixture plate, the length direction of the limiting groove is taken as the first direction S1, and the direction perpendicular to the limiting groove is taken as the second direction S2.

[0038] Specifically:

[0039] A pressing fixture for a water tank assembly shaft core includes a fixture plate 2 and a pressing assembly 3.

[0040] like Figures 1-3 As shown, the fixture plate 2 is set on the machine base 4 and a limiting groove 21 is provided along the first direction S1; when the clean water tank 1 is placed on the fixture plate 2, the axis where the hinge shaft of the tank body 12 and the tank cover 11 is located is parallel to the first direction S1, and the shaft core 13 is partially located in the limiting groove 21.

[0041] In this design, the jig plate 2 is inclined relative to the horizontal plane, and the water tank 1 is also inclined when placed on the jig plate 2. In the vertical direction, the tank cover 11 is higher than the bottom of the tank body 12. The jig plate 2 includes a first contour plate 22, a second contour plate 23, and a limiting plate 24. The first contour plate 22 is located at the lower end of the jig plate 2, and the bottom of the water tank 1 is connected to the first contour plate 22 when placed. The second contour plate 23 is located on the surface of the jig plate 2, and the contour surface of the water tank 1 is connected to the second contour plate 23 when placed, achieving positioning. Of course, in other embodiments, multiple contour plates with different shapes can be set according to the actual structure of the water tank 1. The design should follow the modular principle of function orientation and form adaptation. In other product iteration or serialized product assembly scenarios, only the corresponding contour plate module needs to be replaced to achieve rapid adaptation, so as to ensure that the water tank 1 can be accurately positioned. This design strategy maintains the high versatility of the core drive device and control system, and meets the flexible production needs of multiple varieties through replaceable limiting execution units. The limiting plate 24 is located at the higher end of the fixture plate 2 and is connected to the fixture plate 2 via the second driving device 25. The second driving device 25 can drive the limiting plate 24 to move in the second direction S2 to press against the box cover 11 on the fixture plate 2, thereby making the box cover 11 accurately aligned with the box body 12. The second driving device 25 can be a cylinder, motor, or other driving mechanism, which can realize the reciprocating movement of the limiting plate 24 in the second direction S2.

[0042] In this embodiment, a long handle 112 is provided on the lid 11; a positioning groove 241 is provided on the limiting plate 24. When the second driving device 25 drives the limiting plate 24 to press against the lid 11, the positioning groove 241 is just engaged with the handle 112. The positioning groove 241 and the contour of the handle 112 form a surface contact constraint, which effectively limits the displacement of the lid. On the other hand, the contact between the bottom of the groove and the top surface of the handle generates a pre-tightening force on the lid 11, which ensures that the assembly surface of the lid and the box body are tightly fitted, and avoids the lid tilting phenomenon caused by the deviation of the force applied by the driving device. Of course, the structure of the limiting plate 24 is designed according to the structure of the lid 11 in this embodiment. In other embodiments, different structures of the limiting plate 24 can be set according to the specific structure of the lid 11, so that the limiting plate 24 can play a limiting role on the lid 11 when it presses against it. This feature-matching-based limiting mechanism improves positioning accuracy while utilizing the original structural elements of the cover as a reference, avoiding the complexity caused by adding auxiliary components such as positioning pins. The second driving device 25 drives the limiting plate 24 to move a preset distance, ensuring that the clamping force between the cover 11 and the box body 12 is constant, and that the applied clamping force is stable within the set threshold range. This dynamic control strategy overcomes the risk of workpiece damage that may be caused by traditional rigid pressing, and eliminates the problem of false pressure caused by mechanical vibration or workpiece tolerances.

[0043] In this embodiment, the hinge joint between the tank body 12 and the lid 11 protrudes from the tank body 12 of the clean water tank 1. Therefore, a clearance groove 26 is provided on the fixture plate 2, which is connected to the limiting groove 21. When the clean water tank 1 is placed on the fixture plate 2, the hinge joint between the lid 11 and the tank body 12 is located within the clearance groove 26, that is, the two sides of the hinge joint in the first direction S1 are in contact with the two sides of the clearance groove 26 in the first direction S1, and the first connecting hole 111 at the hinge joint corresponds to the limiting groove 21. Of course, in other embodiments, it is necessary to determine whether to design the clearance groove 26 or to determine the setting position of the clearance groove 26 according to the different structures of the clean water tank 1, so as to ensure that the limiting groove 21 corresponds to the first connecting hole 111 after the clean water tank 1 is placed on the fixture plate 2.

[0044] Two pressing components 3 are provided, symmetrically arranged on both sides of the fixture plate 2 in the first direction S1. The pressing components 3 are connected to the fixture plate 2 via a first bracket 31, and include a first driving device 32 and an ejector pin 33 connected to the first driving device 32. The length direction of the ejector pin 33 is the first direction S1. Driven by the first driving device 32, the ejector pin 33 moves within the limiting groove 21 along the first direction S1 and can push against the shaft core 13 within the limiting groove 21. The first driving device 32 can be a cylinder, motor, or other driving mechanism capable of driving linear motion.

[0045] To ensure the stability of the movement of the ejector pin 33, a guide block 27 is provided on the fixture plate 2. The guide block 27 is provided with a through guide hole 271. The length direction of the guide hole 271 is the first direction S1. The ejector pin 33 passes through the guide hole 271 and connects with the limiting groove 21.

[0046] The ejector pin 33 is a round rod, and one end has a countersunk head that exerts significant force when pressing against the shaft core 13. After prolonged use, wear and deformation may occur, affecting the assembly accuracy of the shaft core 13. Therefore, the ejector pin 33 needs to be replaced periodically. The first drive device 32 needs to be disassembled to allow sufficient space for removing the ejector pin 33, and each installation requires realigning the first drive device 32, making the operation complex. Therefore, in this embodiment, a mounting head 34 is provided between the first drive device 32 and the ejector pin 33. One end of the mounting head 34 is fixedly connected to the drive end of the first drive device 32 via threads, and the other end has a T-shaped groove 341, in which the countersunk head on the ejector pin 33 is precisely engaged. When the ejector pin 33 needs replacement after prolonged use, the mounting head 34 can be rotated to separate it from the first drive device 32; then, the countersunk head 331 can be moved within the groove 341 to disengage it, thus removing the mounting head 34. At this point, there is enough space at the end of the ejector pin 33 near the first drive device 32 to allow the ejector pin 33 to be pulled out. During installation, the ejector pin 33 is inserted into the guide hole 271, the countersunk head 331 is connected to the mounting head 34, and the mounting head 34 is connected to the first drive device 32 in sequence. No repeated positioning is required, making the operation more convenient.

[0047] In this embodiment, the machine tool 4 is equipped with an operation panel 41. To ensure operational safety, the operation panel 41 is equipped with at least two drive buttons 42. Simultaneously, the fixture plate 2 is also equipped with a sensor 28 capable of sensing the clean water tank 1. When the clean water tank 1 is placed on the fixture plate 2, after the sensor 28 senses the clean water tank 1, the operator can press the two drive buttons 42 sequentially to activate the second drive device 25 and the first drive device 32. If the sensor 28 fails to sense the clean water tank 1, pressing the two drive buttons 42 will not activate the first drive device 32 or the second drive device 25.

[0048] The assembly process of the shaft core 13 of the clean water tank 1 component in this embodiment is as follows:

[0049] When the pre-assembled water tank 1 is placed into the fixture plate 2, the contact surface between the bottom of the tank body 12 and the first contour plate 22 forms the main support reference. The second contour plate 23 achieves three-dimensional positioning constraint by embedding into the groove structure of the tank body 12. The dual contour positioning system ensures that the spatial posture of the components in the fixture fully meets the assembly requirements. At this time, the hinge of the tank body 12 and the cover 11 is in the clearance groove 26, and the unassembled shaft core 13 pre-positioned section is kept in the waiting-to-be-pressed state in the limiting groove 21. The entire system forms a complete assembly preparation posture. When the sensor 28 senses the water tank 1 on the fixture plate 2, it triggers the start of the assembly process. The operator presses the two drive buttons 42 on the operation panel 41 in sequence. First, the second drive device 25 executes the axial movement command, driving the limiting plate 24 to move towards the lid 11 in the second direction S2. The positioning groove 241 connects with the handle 112, achieving circumferential positioning of the lid 11 through precise matching of geometric contours. The limiting plate 24 continues to move, pressing against the lid 11, making the lid 11 and the box body 12 tightly connected, thus making the axis of the first connecting hole 111 and the axis of the second connecting hole 121 completely coincide. After the lid is positioned, the first drive devices 32 distributed on both sides of the fixture plate 2 start simultaneously, driving the ejector pin 33 to move along the limiting groove 21 through the mounting head 34. The end of the ejector pin 33 presses against the end shaft core 13, causing the shaft core 13 to pass through the first connecting hole 111 and be inserted into the second connecting hole 121, completing the assembly of the shaft core 13. Afterwards, the first drive device 32 and the second drive device 25 are reset in sequence, and the operator removes the clean water tank 1. This process effectively ensures the repeatability and process stability of the assembly process through mechanism interlocking control and sequential action logic.

[0050] The distance driven by the first driving device 32 is a preset distance, which is enough to push the core 13 against the shaft until the core 13 is completely submerged in the first connecting hole 111.

[0051] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A water tank assembly shaft core press fixture, a water tank comprising a tank body and a tank cover, the tank body and the tank cover being hinged by a shaft core, characterized in that, include: A fixture plate is set on the machine platform and has a limiting groove along the first direction; when the clean water tank is placed on the fixture plate, the axis of rotation of the hinge shaft of the tank body and the tank cover is parallel to the first direction, and the shaft core is in the limiting groove. The pressing assembly is connected to the fixture plate via a first bracket and includes a first driving device and a pin connected to the first driving device. The pin moves in the limiting groove and along a first direction under the drive of the first driving device, and pushes the shaft core to connect with the clean water tank.

2. The clear water tank assembly shaft core press fixture of claim 1, wherein: The fixture plate is inclined and also includes a first contour plate, a second contour plate and a limiting plate. The limiting plate is connected to the fixture plate through a second driving device with a second driving direction. When the clean water tank is placed on the fixture plate, the tank body is positioned by the first and second contour plates, and the tank cover is fixed to the tank body by the limiting plate driven by the second driving device.

3. The clear water tank assembly shaft core press fixture of claim 2, wherein: The lid is equipped with a handle, and the limiting plate is provided with a positioning groove, which is connected to the handle.

4. The clear water tank assembly shaft core press fixture of claim 1, wherein: The pressing assembly also includes a guide block connected to the fixture plate, the guide block having a through guide hole, and the ejector pin passing through the guide hole and connecting to the limiting groove.

5. The clear water tank assembly shaft core press fixture of claim 1, wherein: The ejector pin is connected to the first driving device via a mounting head; The mounting head is provided with a T-shaped slot, which is connected to the countersunk head on the ejector pin.

6. The clear water tank assembly shaft core press fixture of claim 1, wherein: The pressing assembly is configured as two, and the two pressing assemblies are symmetrically arranged on both sides of the fixture plate in a first direction.

7. The clear water tank assembly shaft core press fixture of claim 1, wherein: The fixture plate is equipped with a sensor that can sense the clean water tank on the fixture plate.

8. The clear water tank assembly shaft core press fixture of claim 1, wherein: The fixture plate is provided with a clearance groove, which is connected to the limiting groove; When the water tank is placed on the fixture plate, the hinge joint between the tank cover and the tank body is in the clearance groove, and the shaft core is in the limiting groove.

9. The clear water tank assembly shaft core press fixture of claim 1, wherein: An operation panel is installed on the machine.

10. The clear water tank assembly shaft core press fixture of claim 2, wherein: The first driving device is a cylinder; the second driving device is a cylinder.

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