Water pump flange press fitting machine

Abstract

The utility model discloses a water pump flange press -mounting machine belongs to water pump manufacturing technical field, including the organism, is provided with the hydraulic telescopic link on the organism installation setting, and the output shaft of hydraulic telescopic link is provided with the pressure head, and the workstation is fixedly arranged below the pressure head in the organism. The utility model uses, and the pull rod is made to the elastic element with hand and is stretched to the radial contraction mechanism and keeps radial contraction state, then the rear cover of water pump is inverted and is buckled on the workstation, and the radial contraction mechanism enters the inside of rear cover, then the pull rod is loosened, and the pull rod moves down under the stretch of elastic element, and the radial contraction mechanism expands and touches the inside wall of rear cover, realizes the circumferential positioning of rear cover, and through setting radial contraction mechanism, can conveniently position the rear cover of water pump, and can adapt to the positioning of various specifications rear cover, when producing the rear cover of different diameter, need not to replace the positioning fixing device, convenient operation has improved production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of water pump manufacturing technology, and in particular relates to a water pump flange press-fitting machine. Background Technology

[0002] The water pump includes a volute and a rear cover, which are fixed together by bolts. The water pump shaft passes through the rear cover and enters the cavity formed by the volute and the rear cover, where an impeller is fixedly installed. The water pump shaft located outside the rear cover has a flange, and the motor output shaft has a flange. The flanges of the water pump shaft and the motor output shaft are fixed together by bolts, so as to connect the motor output shaft and the water pump shaft and enable the motor to drive the water pump to rotate.

[0003] In the water pump manufacturing process, 1. the water pump shaft is inserted into the shaft hole of the rear cover and rotatedly connected to the rear cover through bearings; 2. the flange is press-fitted onto the outer end of the water pump shaft. A key is fixedly embedded on the water pump shaft, and a keyway is opened in the shaft hole of the flange. The keyway of the flange is aligned with the key of the water pump shaft. Then, pressure is applied to the flange by a press-fitting machine, so that the flange is fixedly embedded on the water pump shaft, thus realizing the press-fitting of the flange.

[0004] In the flange press-fitting process, the press-fitting machine is equipped with a worktable. The back cover is placed upside down on the worktable, which has a positioning device. The existing positioning device is a cylindrical pin. Several cylindrical pins are inserted into the bolt holes of the back cover to achieve the positioning of the back cover. However, the bolt spacing of different specifications of back covers is not the same. When changing to produce back covers of different specifications, it is necessary to reset the spacing and position of multiple cylindrical pins to adapt to the position of the bolts of the back cover. Alternatively, different positioning molds can be set for different specifications of back covers, and directly changing the molds is cumbersome and reduces production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a water pump flange press-fitting machine. The device for positioning the rear cover can adapt to the positioning of rear covers of various diameters, is easy to operate, and effectively improves production efficiency.

[0006] This utility model adopts the following technical solution: a water pump flange press-fitting machine, including a machine body, on which a hydraulic telescopic rod is installed, and the output shaft of the hydraulic telescopic rod is provided with a press head; a worktable is fixedly installed below the press head inside the machine body, and a positioning and fixing device is provided inside the worktable. The positioning and fixing device is used to position the rear cover of the water pump and restrict the movement of the rear cover in the circumferential direction. The positioning and fixing device includes a pull rod that is slidably installed in the worktable in the vertical direction, and a radial contraction mechanism is provided on the pull rod located above the worktable. An elastic element is fixedly installed between the pull rod and the worktable. The elastic element is in a natural state, and the radial contraction mechanism is kept in a radially expanded state.

[0007] Furthermore, the radial contraction mechanism includes two symmetrically arranged support rods, each of which has a connecting rod hinged to its top and bottom ends. The top ends of the two upper connecting rods are hinged to the top end of the pull rod, and the two lower connecting rods are hinged to the worktable.

[0008] Furthermore, a circular hole is provided on the upper end face of the connecting rod.

[0009] Furthermore, a base block is fixedly installed on the upper end face of the workbench. A through groove is radially opened on the upper end face of the base block. A receiving hole is coaxially opened on the upper end face of the base block. The pull rod passes upward through the workbench and the base block and is located in the receiving hole. A bottom block is coaxially fixedly installed on the inner bottom wall of the receiving hole of the base block. The bottom ends of the two lower connecting rods are hinged to the bottom block.

[0010] Furthermore, an extension cylinder is fixedly installed on the upper end face of each support rod. A notch is opened on the upper end face of each extension cylinder at the position corresponding to the upper connecting rod. The upper connecting rod is located in the notch and hinged to the upper end of the support rod.

[0011] Furthermore, the elastic element is a tension spring, with the top end of the tension spring fixedly connected to the pull rod and the bottom end of the tension spring fixedly connected to the upper surface of the base block.

[0012] Furthermore, a lip plate is fixedly installed at the top of the pull rod, and the top of the tension spring is fixedly installed with the lip plate.

[0013] Furthermore, the tops of the two upper connecting rods are hinged to the lip plate.

[0014] Furthermore, the machine body includes two columns and a crossbeam fixedly installed at the top of each of the two columns. A hydraulic telescopic rod is installed vertically on the crossbeam, and the worktable is fixedly installed between the two columns.

[0015] Furthermore, a hydraulic pump station is fixedly installed on the right-side column, which provides hydraulic oil to the hydraulic telescopic rod.

[0016] I. This utility model, by setting up a hydraulic telescopic rod, a pressure head, a pull rod, and a radial contraction mechanism, allows for convenient use of the device. First, the pull rod is manually pushed upwards from below the worktable, stretching the elastic element and keeping the radial contraction mechanism in a radially contracted state. Then, the water pump's rear cover is inverted and placed on the worktable. At this point, the radial telescopic mechanism, being in a contracted state, enters the interior of the rear cover. The pull rod is then released, and under the stretching of the elastic element, it moves downwards, causing the radial contraction mechanism to expand and abut against the inner wall of the rear cover, achieving circumferential positioning. Next, the flange is placed on the rear cover shaft, ensuring the flange's keyway aligns with the key on the shaft. The press-fitting machine is then started, causing the hydraulic telescopic rod to extend and push the pressure head downwards, pressing the flange and inserting the rear cover shaft into the flange's shaft hole, completing the flange press-fitting process. The radial contraction mechanism facilitates convenient positioning of the water pump's rear cover and can accommodate various rear cover specifications. When changing rear covers of different diameters for production, there is no need to change the positioning and fixing device, making operation convenient and improving production efficiency.

[0017] II. This utility model, by setting up a pull rod, connecting rod, and support rod, allows the device to function as follows: when the pull rod moves upward, it drives the two connecting rods above to move upward, causing the support rods to simultaneously drive the outer ends of the two connecting rods below to rotate upward. This causes both support rods to move inward in a radially vertical state, thus reducing the distance between the two support rods. In use, the back cover can be placed upside down, allowing the support rods to enter the back cover. Then, the pull rod is released, and it moves downward under the tension of the elastic element. This causes both support rods to move outward and abut against the inner wall of the back cover, thus positioning the back cover. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the flange in this utility model;

[0020] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the back cover in this utility model;

[0021] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the base block in this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the back cover and base block in this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the tie rod in this utility model;

[0024] Figure 7This is a schematic diagram of the internal three-dimensional structure of the heightened cylinder in this utility model;

[0025] Figure 8 This is a schematic diagram of the internal three-dimensional structure of the pull rod in this utility model.

[0026] In the diagram, 1. Machine body; 2. Hydraulic telescopic rod; 3. Pressure head; 4. Worktable; 5. Rear cover; 6. Tie rod; 7. Flange; 8. Support rod; 9. Connecting rod; 10. Circular hole; 11. Rear cover shaft; 12. Base block; 13. Through groove; 14. Receiving hole; 15. Bottom block; 16. Elevating cylinder; 17. Notch; 18. Tension spring; 19. Lip plate; 20. Column; 21. Crossbeam; 22. Hydraulic pump station. Detailed Implementation

[0027] Please see Figure 1-8 The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0028] The water pump flange press-fitting machine of this utility model includes a body 1, on which a hydraulic telescopic rod 2 is installed. A pressure head 3 is mounted on the output shaft of the hydraulic telescopic rod 2. A worktable 4 is fixedly installed below the pressure head 3 inside the body 1. A positioning and fixing device is installed inside the worktable 4 to position the rear cover 5 of the water pump and restrict its circumferential movement. The positioning and fixing device includes a pull rod 6 slidably mounted vertically within the worktable 4. A radial contraction mechanism is mounted on the pull rod 6 above the worktable 4. An elastic element is fixed between the pull rod 6 and the worktable 4. The elastic element is in its natural state, and the radial contraction mechanism remains in a radially expanded state. In use, first, the pull rod 6 is pushed upwards from below the worktable 4 by hand, causing the pull rod 6 to stretch the elastic element, thus keeping the radial contraction mechanism in a radially contracted state. Then, the rear cover 5 of the water pump is inverted and placed on the worktable 4. At this time, the radial telescopic mechanism... The rear cover 5 is inserted into the retracted state, and then the pull rod 6 is released. The pull rod 6 moves downward under the tension of the elastic element, causing the radial contraction mechanism to expand and abut against the inner wall of the rear cover 5, thereby achieving circumferential positioning of the rear cover 5. Then, the flange 7 is placed on the rear cover shaft 11, so that the keyway of the flange 7 corresponds to the key of the rear cover shaft 11 (in the prior art, the flange is clamped to the rear cover shaft 11 by a clamping tool, which is not the technical problem to be solved in this application and will not be described here). Then, the press machine is started, so that the hydraulic telescopic rod 2 extends and pushes the press head 3 down, so that the press head 3 presses down on the flange 7, pressing the rear cover shaft 11 into the shaft hole of the flange 7, thus completing the press installation of the flange 7. By setting the radial contraction mechanism, the rear cover 5 of the water pump can be conveniently positioned, and it can adapt to the positioning of various specifications of rear cover 5. When changing the rear cover 5 of different diameters for production, there is no need to change the positioning and fixing device, which is convenient to operate and improves production efficiency.

[0029] In this embodiment, the radial shrinkage mechanism includes two symmetrically arranged support rods 8. Each support rod 8 has a connecting rod 9 hinged to its top and bottom ends. The top ends of the two upper connecting rods 9 are hinged to the top end of the pull rod 6, and the two lower connecting rods 9 are hinged to the worktable 4. When the pull rod 6 moves upward, it drives the two upper connecting rods 9 to move upward, causing the support rod 8 to simultaneously drive the outer ends of the two lower connecting rods 9 to rotate upward. This causes both support rods 8 to move inward in a radially vertical state, reducing the distance between the two support rods 8 and thus achieving the shrinkage function of the radial shrinkage mechanism. In use, the back cover 5 is placed upside down, allowing the support rods 8 to enter the interior of the back cover 5. Then, the pull rod 6 is released, and the pull rod 6 moves downward under the tension of the elastic element. This causes both support rods 8 to move outward and abut against the inner wall of the back cover 5, thus positioning the back cover 5.

[0030] When positioning the back cover 5, the axis of the back cover shaft 11 coincides with that of the pull rod 6, causing interference between the back cover shaft 11 and the pull rod 6. To solve this problem, in this embodiment, a round hole 10 is provided on the upper end face of the connecting rod 9. In use, when positioning the back cover 5, the back cover shaft 11 can be inserted into the round hole 10 of the pull rod 6.

[0031] Due to the height limitation of the rear cover 5, when the rear cover 5 is fully placed on the workbench 4, the range of motion of the two lower connecting rods 9 is restricted. Furthermore, the rear cover 5 cannot simultaneously accommodate the full range of motion of both the upper and lower connecting rods 9. To address this issue, in this embodiment, a base block 12 is fixedly installed on the upper surface of the workbench 4. A through groove 13 is radially formed on the upper surface of the base block 12, and a receiving hole 14 is coaxially formed on the upper surface of the base block 12. The pull rod 6 passes upward through the workbench 4 and the base block 12 and is located within the receiving hole 14. A base block 15 is coaxially fixed to the inner bottom wall of the receiving hole 14. The bottom ends of the two lower connecting rods 9 are hinged to the base block 15. When the two lower connecting rods 9 rotate, they move in the through groove 13, which allows the two support rods 8 to abut against the inner wall of the back cover 5, thus achieving the purpose of circumferential positioning of the back cover 5. The base block 12 is set so that the two lower connecting rods 9 rotate in the drive groove 13, reducing the height of the effective movement space of the support rods 8. The purpose is to allow the support rods 8 to have movement space and abut against the inner wall of the back cover 5.

[0032] In this embodiment, an extension cylinder 16 is fixedly provided on the upper end face of each support rod 8. A notch 17 is provided on the upper end face of each extension cylinder 16 at the position corresponding to the upper connecting rod 9. The upper connecting rod 9 is located in the notch 17 and is hinged to the upper end of the support rod 8. By providing the extension cylinder 16, the support rod 8 abuts against the inner side wall of the rear cover 5 through the extension cylinder 16, which increases the area of ​​the support rod 8 abutting against the rear cover 5 and can better position the rear cover 5.

[0033] In this embodiment, the elastic element is a tension spring 18. The top end of the tension spring 18 is fixedly disposed with the pull rod 6, and the bottom end of the tension spring 18 is fixedly disposed with the upper end surface of the base block 12.

[0034] In this embodiment, a lip plate 19 is fixedly installed at the top of the pull rod 6, and the top of the tension spring 18 is fixedly installed with the lip plate 19.

[0035] In this embodiment, the top ends of the two upper connecting rods 9 are hinged to the lip plate 19.

[0036] In this embodiment, the machine body 1 includes two columns 20 and a crossbeam 21 fixedly installed at the top of each of the two columns 20. The hydraulic telescopic rod 2 is installed on the crossbeam 21 in a vertical direction, and the worktable 4 is fixedly installed between the two columns 20.

[0037] In this embodiment, a hydraulic pump station 22 is fixedly installed on the right column 20, and the hydraulic pump station 22 provides hydraulic oil to the hydraulic telescopic rod 2.

[0038] The working principle of this utility model is as follows: In use, first, push the pull rod 6 upwards from below the workbench 4, causing the pull rod 6 to stretch the tension spring 18. This causes the pull rod 6 to move the two upper connecting rods 9 upwards, which in turn moves the support rod 8 upwards. Simultaneously, the two lower connecting rods 9 rotate upwards, causing both support rods 8 to move radially inwards, maintaining a radially contracted state. Then, invert the water pump's rear cover 5 onto the workbench 4. At this point, the pull rod 6, the two upper connecting rods 9, and the support rod 8 enter the interior of the rear cover 5. Then, release the pull rod 6. The pull rod 6 moves downward under the tension of the pressure spring, causing the two upper and lower connecting rods 9 to move closer to each other, which in turn causes the two support rods 8 to move away from each other and abut against the inner wall of the rear cover 5, achieving circumferential positioning of the rear cover 5. Then, the flange 7 is placed on the rear cover shaft 11, so that the keyway of the flange 7 corresponds to the key of the rear cover 5 shaft. Then, the press machine is started, causing the hydraulic telescopic rod 2 to extend and push the press head 3 downward, so that the press head 3 presses down on the flange 7, pressing the rear cover shaft 11 into the shaft hole of the flange 7, completing the press installation of the flange 7.

Claims

1. A water pump flange press-fitting machine, characterized in that: The device includes a body (1), on which a hydraulic telescopic rod (2) is installed. The output shaft of the hydraulic telescopic rod (2) is equipped with a pressure head (3). Inside the body (1), below the pressure head (3), a worktable (4) is fixedly installed. Inside the worktable (4), a positioning and fixing device is installed. The positioning and fixing device is used to position the rear cover (5) of the water pump and restrict the movement of the rear cover (5) in the circumferential direction. The positioning and fixing device includes a pull rod (6) that is slidably installed in the worktable (4) in the vertical direction. A radial contraction mechanism is installed on the pull rod (6) located above the worktable (4). An elastic element is fixedly installed between the pull rod (6) and the worktable (4). The elastic element is in a natural state, and the radial contraction mechanism is in a radially expanded state.

2. The water pump flange press-fitting machine according to claim 1, characterized in that: The radial contraction mechanism includes two symmetrically arranged support rods (8), each support rod (8) has a connecting rod (9) hinged to its top and bottom. The tops of the two upper connecting rods (9) are hinged to the top of the pull rod (6), and the two lower connecting rods (9) are hinged to the worktable (4).

3. The water pump flange press-fitting machine according to claim 2, characterized in that: The upper end face of the connecting rod (9) is provided with a circular hole (10).

4. The water pump flange press-fitting machine according to claim 2, characterized in that: The upper end face of the workbench (4) is fixedly provided with a base block (12). The upper end face of the base block (12) is provided with a through groove (13) along the radial direction. The upper end face of the base block (12) is provided with a receiving hole (14) coaxially. The pull rod (6) passes upward through the workbench (4) and the base block (12) and is located in the receiving hole (14). The inner bottom wall of the receiving hole (14) of the base block (12) is fixedly provided with a bottom block (15) coaxially. The bottom ends of the two lower connecting rods (9) are hinged to the bottom block (15).

5. The water pump flange press-fitting machine according to claim 2, characterized in that: Each support rod (8) has a heightening cylinder (16) fixedly installed on its upper end face. Each heightening cylinder (16) has a notch (17) at the position corresponding to the upper connecting rod (9). The upper connecting rod (9) is located in the notch (17) and is hinged to the upper end of the support rod (8).

6. The water pump flange press-fitting machine according to claim 4, characterized in that: The elastic element is a tension spring (18), the top end of the tension spring (18) is fixedly set to the pull rod (6), and the bottom end of the tension spring (18) is fixedly set to the upper end surface of the base block (12).

7. The water pump flange press-fitting machine according to claim 6, characterized in that: The top end of the pull rod (6) is fixedly provided with a lip plate (19), and the top end of the tension spring (18) is fixedly provided with the lip plate (19).

8. The press-fitting machine according to claim 7, characterized in that: The top ends of the two upper connecting rods (9) are hinged to the lip plate (19).

9. The water pump flange press-fitting machine according to claim 1, characterized in that: The machine body (1) includes two columns (20) and a crossbeam (21) fixedly installed at the top of the two columns (20). The hydraulic telescopic rod (2) is installed on the crossbeam (21) in the vertical direction. The worktable (4) is fixedly installed between the two columns (20).

10. The water pump flange press-fitting machine according to claim 1, characterized in that: A hydraulic pump station (22) is fixedly installed on the right column (20), which provides hydraulic oil to the hydraulic telescopic rod (2).

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