Press fitting device for water meter pointer and signaling piece

Abstract

The utility model discloses a press-fitting device for a water meter pointer and a signaling piece, which comprises a support, and the support is provided with a main punch through a pressing-down driving cylinder; the pointer semicircular plate is placed on the top surface of the supporting column; the semicircular main body of the signaling sheet is positioned in the semicircular pit of the semicircular plate of the pointer, and the two pins of the signaling sheet extend out of the semicircular plate; the main punch is provided with a center hole with a downward opening, a pressing head used for abutting against the signaling piece semicircular body and the pointer semicircular plate is arranged in the center hole in a sliding fit mode, and a pressure spring is arranged between the pressing head and the bottom of the center hole. The bottom end of the main punch is provided with a bottom ring face used for bending two pins of the signaling piece downwards. The pressure head is lower than the bottom ring surface in an initial state; a left side driving cylinder and a right side driving cylinder are arranged on the two side walls of the main punch respectively, and a piston rod of each side driving cylinder is provided with a side punch used for bending a pin inwards. The device is labor-saving, convenient and efficient in operation, high in assembly precision, high in stability and firm in assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to a bending assembly device for a pointer and a signal transmitting piece of a remote water meter. Background Art

[0002] The pointer of a remote water meter is mostly made of plastic. The upper surface of the plastic pointer needs to be covered with half a metal sheet. In this way, when the pointer rotates, the current of the NB remote transmission module of the water meter can sense the half metal sheet and generate a reading.

[0003] The industry refers to this thin metal sheet as a signaling plate. The conventional process for assembling the signaling plate with a plastic pointer is as follows. The pointer consists of a semicircular plate with a protruding needle tip on the front. A semicircular recess is recessed into the upper surface of the plate. A sleeve is provided on the lower surface for the pointer shaft, and two inward-concave notches are defined on the side arcs of the plate. The signaling plate is typically a thin iron plate consisting of a semicircular body and two pins. A worker places the semicircular body into the semicircular recess of the pointer. Then, one pin is bent downward 90 degrees to fit into the notch on the same side, and then bent inward 90 degrees so that the end of the pin contacts the lower surface of the semicircular plate. The same steps are repeated for the other pin, bending downward and then inward.

[0004] From the above analysis, it can be seen that the existing technology relies entirely on workers to manually bend the pointer pins twice to achieve assembly. This is a purely manual operation. The bending process is laborious, slow and inefficient, and the operation accuracy is not high. The assembly stability is also poor, and it is difficult to accurately bend each pin into the notch every time. Therefore, it is time-consuming and labor-intensive, with high labor costs, and the assembly effect is not good. The pointer and the signaling plate are not firmly connected, and even due to misoperation, the bending angle or position is incorrect, causing the pin to be damaged and scrapped. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a press-fitting device for a water meter pointer and a signaling piece, which has the advantages of labor-saving, convenient and efficient operation, high assembly precision, strong stability and firm assembly.

[0006] The technical solution of the utility model is to provide a press-fitting device for a water meter pointer and a signaling piece, which includes a bracket, a downward-pressing drive cylinder installed on the bracket, and a main punch fixed to the downward-pressing drive cylinder; a support column is fixed to the bracket, and the top surface of the support column is provided with left and right limit protrusions and a positioning blind hole, the pointer semicircular plate is placed on the top surface of the support column, the pointer shaft sleeve is inserted into the positioning blind hole, and the pointer needle tip is stuck between the two limit protrusions; the semicircular body of the signaling piece is located in the semicircular pit of the pointer semicircular plate, and the two pins of the signaling piece extend outward from the semicircular plate; the main punch is provided with a center hole opening downward, and the diameter of the center hole is equal to or slightly larger than The diameter of the pointer semicircular plate, a pressure head is slidably fitted in the center hole for pressing the semicircular main body of the signal piece and the pointer semicircular plate against the support column, and a compression spring is provided between the pressure head and the bottom of the center hole; the bottom end of the main punch is provided with a bottom ring surface for bending down the two pins of the signal piece; in the initial state, the pressure head is lower than the bottom ring surface; two side drive cylinders are respectively provided on both side walls of the main punch, and the piston rod of each side drive cylinder is provided with a side punch for bending the pins inward, and transverse through holes are provided on both side walls of the main punch, and each side punch slides with the transverse through hole on the same side of the main punch; concave areas are provided on both sides of the upper part of the support column for avoiding air-proof side punches.

[0007] The press-fitting device operates as follows: The worker places the semicircular body of the signaling plate into the semicircular recess of the pointer, ensuring that the two pins of the signaling plate fit snugly into the two notches of the semicircular plate, thus forming the workpiece to be bent. The workpiece is then placed on the top surface of the support column, with the sleeve inserted into the positioning blind hole and the pin tips nestled between the two stopper protrusions. The worker then activates the downward drive cylinder, lowering the main punch, which presses the semicircular body of the signaling plate and the pointer semicircular plate against the support column. The worker continues to lower the main punch, causing its bottom ring surface to simultaneously bend the two pins downward 90 degrees. When the main punch reaches the lower limit, the side drive cylinders on both sides are activated, simultaneously driving the two side punches inward, bending the two bent pins further inward 90 degrees.

[0008] From the above analysis, it can be seen that the press-fitting device of the present application has the following advantages.

[0009] The operation is convenient. You only need to insert the signal piece into the pointer, and insert the pointer into the positioning blind hole and limit protrusion of the support column. The remaining bending processes of the downward and inward bending pins are driven by the drive cylinder. There is no need for manual bending, which is more labor-saving, fast bending speed and high efficiency. Before bending, the compression spring and the pressure head first press the workpiece tightly on the support column, and then the bottom ring surface of the main punch is bent downward, so the downward bending accuracy is high and the stability is strong. Similarly, after the main punch finishes bending downward, the side punch is accurately started to bend the pins inward, so the side pressure bending accuracy is also high and the stability is strong. The signal piece pins are used to clamp the pointer at the correct angle and correct point to ensure that the signal piece and the pointer are firmly assembled, and the probability of accidental damage and scrapping of the signal piece and the pointer is low.

[0010] Preferably, the bracket includes an upper plate and a lower plate, two guide rods are fixed between the upper plate and the lower plate, and the guide rods are slidably matched with a pressure plate; the cylinder body of the downward driving cylinder is fixed to the upper plate, the piston rod of the downward driving cylinder is fixed to the pressure plate, and the main punch is also fixed to the pressure plate; the support column is fixed on the lower plate; in this way, the stability of the downward pressure of the main punch can be improved, making the downward bending action smoother and more precise.

[0011] As a further preference, the top plate of the main punch is penetrated by a guide hole, the pressure head is penetrated by a vertical through hole, and a screw is also provided in the main punch, the screw head is clamped in the lower mouth of the vertical through hole, the screw rod passes through the vertical through hole and the guide hole in turn, and a nut is provided at the top of the screw rod, which clamps the upper mouth of the guide hole; a compression spring is fitted on the screw rod; a transition sleeve is fixed on the pressure plate, and the upper end of the main punch is fixed to the lower end of the transition sleeve; the part of the screw rod extending out of the guide hole and the nut are both located in the barrel cavity of the transition sleeve; first of all, the above structure is easy to assemble, and only needs to put the screw through the pressure head and the main punch top plate, and then screw on the nut; the elastic connection structure is reasonably arranged, the compression spring is just stuck on the screw, and the elastic connection structure is firm and reliable; and through the guidance of the guide hole, it ensures that the lifting and lowering action of the pressure head is smoother, more accurate and stable, and has a good clamping effect on the workpiece; furthermore, the design of the transition sleeve just accommodates the part of the screw extending out of the guide hole and the nut protection in the barrel cavity, avoiding dust from entering the center hole of the main punch from the sliding gap between the screw and the guide hole, and avoiding dust accumulation in the closed space of the center hole, thereby preventing jamming and affecting the operation of components such as the pressure head and the side punch.

[0012] As a further preferred embodiment, a plug portion is protruding from the top plate of the main punch, and the plug portion is inserted into the lower end of the transition sleeve. The transition sleeve is provided with a transverse hole and the plug portion is provided with a transverse threaded hole. The transition sleeve and the plug portion are fixed by a first bolt that passes through the transverse hole and is screwed into the transverse threaded hole. The above structure is easy and quick to assemble, and only the plug portion needs to be inserted into the lower end of the transition sleeve and the first bolt needs to be tightened.

[0013] As a further preferred option, mounting planes are provided on both the left and right sides of the main punch, each mounting plane is provided with an inner hole, each side drive cylinder is fixed with a mounting bracket, the mounting bracket has an outer hole passing through it, the mounting bracket is fitted with the mounting plane on the same side, and the mounting bracket and the mounting plane on the same side are fixed by a second bolt that passes through the outer hole and is screwed into the inner hole; in this way, the assembly of each side drive cylinder and the main punch is convenient and quick, and the connection effect is firm and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic structural diagram of a press-fit device for a water meter pointer and a signal transmitting piece.

[0015] Figure 2 The utility model is a schematic cross-sectional view of a press-fit device for a water meter pointer and a signaling piece.

[0016] Figure 3 It is a schematic diagram of the explosion structure of the pointer, signal plate and support column.

[0017] Figure 4 It is a schematic diagram of the structure after the pin foot of the signal piece of the workpiece to be bent is bent down.

[0018] Figure 5 It is a schematic diagram of the structure after the pin foot of the signal piece of the workpiece to be bent is bent down and then bent inward.

[0019] Figure 6 yes Figure 2 A partial enlarged schematic diagram.

[0020] As shown in the figure: 1. upper plate, 2. lower plate, 3. guide rod, 4. pressure plate, 5. downward pressure drive cylinder, 6. main punch, 6.1. plug part, 6.2. center hole, 6.3. guide hole, 6.4. mounting plane, 6.5. transverse through hole, 7. transition sleeve, 8. first bolt, 9. support column, 9.1. limiting protrusion, 9.2. positioning blind hole, 9.3. concave area, 10. pointer, 10.1. semicircular plate, 10.2. bushing, 10.3. needle tip, 11. signal sending piece, 11.1. semicircular body, 11.2. pin, 12. pressure head, 12.1. vertical through hole, 13. compression spring, 14. nut, 15. side drive cylinder, 16. mounting bracket, 17. second bolt, 18. side punch. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 6 As shown, the press-fitting device for the water meter pointer and the signaling piece of the utility model includes a bracket, which includes an upper plate 1 and a lower plate 2. Two guide rods 3 are fixed between the upper plate 1 and the lower plate 2, and the guide rods 3 are slidably matched with a pressure plate 4.

[0023] The bracket is equipped with a downward-pressing drive cylinder 5, whose cylinder body is fixed to the bracket upper plate 1, and whose piston rod is fixed to the pressure plate 4. The pressure plate 4 is fixed to a main punch 6; specifically, the pressure plate 4 fixes a transition sleeve 7. The main punch 6 has a protruding plug portion 6.1 on its top plate, which inserts into the lower end of the transition sleeve 7. The side wall of the transition sleeve 7 has a transverse hole, and the plug portion 6.1 has a transverse threaded hole. The transition sleeve 7 and the plug portion 6.1 of the main punch 6 are fixed together by a first bolt 8 that passes through the transverse hole and screws into the transverse threaded hole.

[0024] The lower plate 2 of the bracket is fixed with a support column 9, and the top surface of the support column 9 is provided with two left and right limiting protrusions 9.1 and a positioning blind hole 9.2. The semicircular plate 10.1 of the pointer 10 is placed on the top surface of the support column 9, the pointer 10 sleeve 10.2 is inserted into the positioning blind hole 9.2, and the needle tip 10.3 of the pointer 10 is stuck between the two limiting protrusions 9.1; the semicircular body 11.1 of the signaling piece 11 is located in the semicircular pit of the semicircular plate 10.1 of the pointer 10, and the two pins 11.2 of the signaling piece 11 extend outward from the range of the semicircular plate 10.1.

[0025] The main punch 6 has a downwardly opening central hole 6.2. The diameter of central hole 6.2 is equal to or slightly larger than the diameter of the semicircular plate 10.1 of the pointer 10. For example, the diameter of central hole 6.2 is 1.01 to 1.1 times the diameter of the semicircular plate 10.1. A pressing head 12 is slidably fitted within central hole 6.2 to press the semicircular body 11.1 of the signal transmitting piece 11 and the semicircular plate 10.1 of the pointer 10 against the support column 9. A compression spring 13 is provided between pressing head 12 and the bottom of central hole 6.2. Specifically, the top plate of the main punch 6 has a guide hole 6.3 extending through it, and the punch 12 has a vertical through hole 12.1 extending through it. A screw 13 is also located within the main punch 6. The head of the screw 13 engages the lower end of the vertical through hole 12.1, and the shaft of the screw 13 extends through the vertical through hole 12.1 and the guide hole 6.3 in sequence. A nut 14 is located at the top of the screw 13, which engages the upper end of the guide hole 6.3. A compression spring 13 is sleeved onto the shaft of the screw 13. The portion of the screw 13 that extends upward from the guide hole 6.3 and the nut 14 are both located within the barrel of the transition sleeve 7.

[0026] Since the center hole 6.2 is hollowed out on the bottom end surface of the main punch 6, a bottom ring surface is formed for bending down the two pins 11.2 of the signal sending piece 11; in the initial state, the pressure head 12 is lower than the bottom ring surface; in this way, it is ensured that the pressure head 12 first presses the workpiece tightly against the support column 9, and then bends the workpiece pins 11.2 from the bottom ring surface.

[0027] Two side drive cylinders 15 are respectively provided on the two side walls of the main punch 6, that is, a mounting plane 6.4 is provided on the left and right sides of the main punch 6, each mounting plane 6.4 is provided with an inner hole, and a mounting bracket 16 is fixed to each side drive cylinder 15 body, and the mounting bracket 16 passes through an outer hole. The mounting bracket 16 is in contact with the mounting plane 6.4 on the same side and is fixed to the mounting plane 6.4 on the same side by a second bolt 17 that passes through the outer hole and is screwed into the inner hole.

[0028] The piston rod of each side drive cylinder 15 is provided with a side punch 18 for bending the stitches 11.2 inwardly, and transverse through holes 6.5 are provided on both side walls of the main punch 6. Each side punch 18 is slidably fitted with the transverse through hole 6.5 on the same side of the main punch 6; concave areas 9.3 are provided on both sides of the upper part of the support column 9 for avoiding the side punches 18. In other words, two concave step surfaces are formed on the left and right sides of the upper part of the support column 9.

Claims

1. A press-fit device for a water meter pointer and a signaling plate, characterized in that: It includes a bracket, which is equipped with a downward driving cylinder, which is fixed to a main punch; the bracket is fixed with a supporting column, the top surface of which is provided with left and right limiting protrusions and a positioning blind hole, the pointer semicircular plate is placed on the top surface of the supporting column, the pointer shaft sleeve is inserted into the positioning blind hole and the pointer needle tip is stuck between the two limiting protrusions; the semicircular body of the signal piece is located in the semicircular pit of the pointer semicircular plate and the two pins of the signal piece extend outward from the semicircular plate; the main punch is provided with a center hole with an opening downward, the diameter of the center hole is equal to or slightly larger than the diameter of the pointer semicircular plate, and the center hole is slidingly fitted There is a pressure head for pressing the semicircular main body of the signal piece and the semicircular plate of the pointer against the support column, and a compression spring is provided between the pressure head and the bottom of the center hole; the bottom end of the main punch is provided with a bottom ring surface for bending down the two pins of the signal piece; in the initial state, the pressure head is lower than the bottom ring surface; two side drive cylinders are respectively provided on both side walls of the main punch, and the piston rod of each side drive cylinder is provided with a side punch for bending the pins inward, and transverse through holes are provided on both side walls of the main punch, and each side punch slides with the transverse through hole on the same side of the main punch; concave areas are provided on both sides of the upper part of the support column for avoiding air-proof side punches.

2. The press-fit device for the water meter pointer and the signaling plate according to claim 1, characterized in that: The bracket includes an upper plate and a lower plate, two guide rods are fixed between the upper plate and the lower plate, and the guide rods are slidably matched with a pressure plate; the cylinder body of the downward driving cylinder is fixed to the upper plate, the piston rod of the downward driving cylinder is fixed to the pressure plate, and the main punch is also fixed to the pressure plate; the support column is fixed on the lower plate.

3. The press-fit device for the water meter pointer and the signaling plate according to claim 2, characterized in that: A guide hole is passed through the top plate of the main punch, and a vertical through hole is passed through the pressure head. A screw is also provided in the main punch, and the screw head is clamped in the lower end of the vertical through hole, and the screw rod passes through the vertical through hole and the guide hole in turn. A nut is provided at the top of the screw rod, and the nut is clamped in the upper end of the guide hole; a compression spring is fitted on the screw rod; a transition sleeve is fixed on the pressure plate, and the upper end of the main punch is fixed to the lower end of the transition sleeve; the part of the screw rod extending out of the guide hole and the nut are both located in the barrel cavity of the transition sleeve.

4. The press-fit device for the water meter pointer and the signaling plate according to claim 3, characterized in that: A plug portion protrudes from the top plate of the main punch, which is inserted into the lower opening of the transition sleeve. The transition sleeve is provided with a transverse hole and the plug portion is provided with a transverse threaded hole. The transition sleeve and the plug portion are fixed by a first bolt that passes through the transverse hole and is screwed into the transverse threaded hole.

5. The press-fit device for the water meter pointer and the signaling plate according to claim 1, characterized in that: There are mounting planes on both sides of the main punch, each mounting plane is provided with an inner hole, each side drive cylinder is fixed with a mounting bracket, the mounting bracket has an outer hole, the mounting bracket is fitted with the mounting plane on the same side, and the mounting bracket and the mounting plane on the same side are fixed by a second bolt that passes through the outer hole and is screwed into the inner hole.

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