Needle loading mechanism

Abstract

The utility model discloses a needle mounting mechanism, which belongs to the technical field of needle head assembly and comprises a base, a friction wheel component is arranged on the base and comprises two rollers horizontally arranged at intervals, the rollers are arranged on the base through a fixing seat, and adjusting kidney-shaped holes corresponding to each other in position are arranged on the fixing seat and the base. According to the scheme, the two rolling wheels are arranged in a spaced mode and can drive a needle head to rotate through rotation, the needle head is screwed into an injector outer sleeve, and the interval between the two rolling wheels can be adjusted through the adjusting kidney-shaped holes in the fixing base and the base, so that the needle head assembling device adapts to assembling of needle heads of different specifications and types; the situation that the interval is increased due to abrasion of the rolling wheels after long-term use can be avoided; and the needle head is assembled in a screwing-in manner, so that the defects of bending and the like of the needle head can be prevented, and the qualification rate and the efficiency are improved.

Description

Technical Field

[0001] This utility model relates to a needle assembly structure, and more specifically, to a needle loading mechanism. Background Technology

[0002] A syringe consists of a syringe jacket and a needle. The syringe jacket usually has a threaded opening for attaching the needle. Therefore, some existing needle loading mechanisms use a screw-in method to attach the needle into the syringe jacket. However, some needle loading mechanisms use a press-in method to directly press the needle into the syringe. This can cause significant damage to the needle, such as needle bending. In addition, in order to improve the needle loading efficiency, some devices use multiple syringes to load needles simultaneously. Although this method is fast, it greatly reduces the assembly qualification rate of the syringe barrels. Furthermore, most needle loading devices are not adjustable and can only be adapted to load needles of a single syringe size.

[0003] For example, Chinese Patent Publication No. CNA209424935U, published on September 24, 2019, is a utility model entitled "A Syringe Assembly Machine." It includes a frame, on which are mounted a push rod and rubber stopper assembly device, a needle and syringe barrel assembly device, a syringe assembly assembly device, a dispensing device, and a motor driving the aforementioned devices. The push rod and rubber stopper assembly device is connected to one end of both a push rod feeding device and a rubber stopper feeding device. The needle and syringe barrel assembly device is connected to both a needle feeding device and a syringe barrel feeding device. The push rod and rubber stopper assembly device and the needle and syringe barrel assembly device are connected to the syringe assembly device, which is then connected to the dispensing device. The widened conveyor tray significantly improves assembly efficiency. However, this solution lacks adjustment functionality, only accommodates a limited range of needle specifications, and is prone to producing defective products. Utility Model Content

[0004] This invention overcomes the above-mentioned problems and provides a needle loading mechanism. This solution has an adjustment function, which enables the needle loading mechanism to be adapted to the assembly of various types and specifications of needles, and can also ensure the qualification rate and efficiency of needle assembly.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a needle loading mechanism, including a base, on which a friction wheel assembly is provided. The friction wheel assembly includes two horizontally spaced rollers, which are mounted on the base via a fixed seat. The fixed seat and the base are provided with corresponding adjustment holes. In this solution, the two rollers are spaced apart and can rotate to drive the needle to rotate, screwing the needle into the syringe sleeve. The spacing between the two rollers can be adjusted through the adjustment holes on the fixed seat and the base to accommodate the assembly of needles of different specifications and types. In addition, it can also avoid the spacing from increasing due to roller wear over long-term use. Furthermore, this solution uses a screw-in method to assemble the needle, which can prevent defects such as needle bending, and improve the pass rate and efficiency.

[0006] Preferably, the fixing base is provided with a rotating shaft, one end of which is connected to the roller, and the other end of which passes through the base and is connected to a transmission assembly. The transmission assembly can drive the rotating shaft to rotate, which in turn drives the roller to rotate, thereby completing the rotation operation of the needle.

[0007] Preferably, the base is further provided with an adjustment assembly, which includes an adjustment plate and an adjustment screw. The adjustment plate is threadedly connected to the adjustment screw and is fixedly connected to the fixed seat. The adjustment assembly is mainly used to adjust the distance between the two rollers. The adjustment plate and the fixed seat are fixed together. By rotating the adjustment screw, the two fixed seats can be moved relative to each other or towards each other, thus changing the distance between the two fixed seats, i.e., the distance between the rollers.

[0008] Preferably, the transmission assembly includes a drive device, the output end of which is provided with a conveyor belt, which is also connected to the rotating shaft in a transmission connection. The drive device drives the conveyor belt to move, which in turn drives the rotating shaft to move, thus realizing the rotation of the roller.

[0009] Preferably, the rollers rotate in the same direction. To ensure the needle can rotate, the two rollers need to rotate in the same direction, either clockwise or counterclockwise.

[0010] Preferably, the base is provided with an adjusting wheel assembly near the transmission component. The adjusting wheel assembly includes an adjusting rod and an adjusting wheel, with the adjusting wheel fixed to the adjusting rod and abutting against the conveyor belt. The adjusting wheel assembly is mainly used to adjust the tension of the conveyor belt. When the distance between the two rollers changes, the tension of the conveyor belt will also change, thus requiring the adjusting wheel and adjusting screw to adjust the tension.

[0011] Preferably, the adjusting wheel is provided with a connecting rod, and the base is provided with an elongated hole corresponding to the position of the adjusting wheel. One end of the connecting rod passes through the elongated hole and is fixedly connected to a limiting part. The connecting rod is used to connect the adjusting wheel and to arrange the adjusting wheel on the base through the limiting part; the elongated hole allows the adjusting wheel to have a certain adjustment range.

[0012] Preferably, the assembly tray is also included, wherein the assembly tray has evenly distributed mounting grooves on its circumference, and the mounting grooves correspond to the spacing between the two rollers. The mounting grooves on the assembly tray are used to convey the needle and syringe jacket; the circular trajectory formed by the mounting grooves needs to be tangent to the spacing between the two rollers so that the mounting grooves can pass through the two rollers and complete the rotation operation of the needle.

[0013] Preferably, the assembly tray includes a first tray body and a second tray body. The first tray body has a first groove, and the second tray body has a second groove, with the first groove and the second groove vertically aligned. The first tray body and the second tray body on the assembly tray can respectively support the syringe jacket and the needle. The vertical alignment of the first groove and the second groove facilitates the assembly of the needle and the syringe jacket.

[0014] Compared with the prior art, the beneficial effects of this utility model are: (1) It has an adjustment function, which enables the needle loading mechanism to be adapted to the assembly of various types and specifications of needles, and can also ensure the qualification rate and efficiency of needle assembly; (2) It can adaptively adjust the tension of the conveyor belt to ensure the transmission effect; (3) It adopts a rotation method for assembly, which can reduce the damage rate of needles; (4) It has a simple structure and a reasonable structural arrangement, which is conducive to the arrangement and installation of the mechanism and reduces the cost to a certain extent. Attached Figure Description

[0015] Figure 1 This is an exploded view of the present invention.

[0016] Figure 2 This is an isometric drawing of the present invention.

[0017] Figure 3 This is the front view of the present utility model.

[0018] Figure 4 This is a schematic diagram of the structure on the base of this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the bottom of the base of this utility model.

[0020] Figure 6 This is a cross-sectional view of the adjusting wheel assembly of this utility model.

[0021] The components are as follows: 1. Base, 2. Roller, 3. Fixed seat, 4. Adjusting waist hole, 5. Rotating shaft, 6. Adjusting plate, 7. Adjusting screw, 8. Drive device, 9. Conveyor belt, 10. Adjusting rod, 11. Adjusting wheel, 12. Connecting rod, 13. Long waist hole, 14. Limiting part, 15. Assembly plate, 15.1. First plate body, 15.2. Second plate body, 16. Mounting groove, 18.1. Needle, 18.2. Syringe jacket, 19. Support plate, 20. Driving wheel, 21. Driven wheel, 22. Auxiliary wheel, 23. Support component, 24. Support foot. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0023] Example 1: As Figures 1 to 6 The needle loading mechanism shown includes a base 1, with a friction wheel assembly arranged above the base 1. The friction wheel assembly includes two fixed seats 3 and two rollers 2. The distance between the two fixed seats 3 can be adjusted, thereby changing the distance between the two rollers 2 to accommodate different specifications of needles 18.1 and syringe jackets 18.2. The two rollers 2 are located on the same horizontal line and arranged horizontally. The distance between the two rollers 2 can be just adapted to the diameter of the needle 18.1. When the needle 18.1 passes between the two rollers 2, the rollers 2 can generate a certain radial pressure on the needle 18.1, so that there is a certain friction between the needle 18.1 and the rollers 2. The rotation between the two rollers 2 can drive the needle 18.1 to rotate, thereby screwing the needle 18.1 into the syringe jacket 18.2.

[0024] Specifically, the fixed base 3 is a structure with a hollow cylinder at the top and a plate at the bottom. A rotating shaft 5 is arranged inside the hollow cylinder of the fixed base 3. One end of the rotating shaft 5 extends from the top of the fixed base 3 and is connected to the roller 2. The other end of the rotating shaft 5 extends downward through the base 1 and connects to the transmission assembly, which drives the rotating shaft 5 to rotate. An adjustment hole 4 is provided on the base plate of the fixed base 3, and a corresponding adjustment hole 4 is also provided on the base 1. Bolts are arranged between the adjustment holes 4 on the fixed base 3 and the base 1. After the distance between the two rollers 2 is adjusted, the two fixed bases 3 and the base 1 can be fixed together by the bolts, thus ensuring that the distance between the two rollers 2 does not easily change. The adjustment hole 4 allows the fixed base 3 to move within a certain range on the base 1 to change the distance between the two rollers 2.

[0025] It should be noted that a friction band is arranged on the outer diameter end face of the roller 2. The friction band helps to generate friction between the needle 18.1 and the roller 2, ensuring that the needle 18.1 can be smoothly screwed into the syringe jacket 18.2. In addition, the friction band also has a certain degree of wear resistance, which can effectively extend the service life of the roller 2.

[0026] An adjustment assembly is also provided on the base 1, corresponding to the position of the friction wheel assembly. The adjustment assembly is mainly used to adjust the distance between the two fixed seats 3, that is, the distance between the two rollers 2. Specifically, the adjustment assembly includes two adjustment plates 6, an adjustment screw 7, and two support plates 19. The two support plates 19 are arranged at the edge of the base 1 and are also located on both sides of the friction wheel assembly. The two support plates 19 and the two fixed seats 3 are on the same straight line. An adjustment screw 7 is rotatably connected between the two support plates 19. The two ends of the adjustment screw 7 are rotatably connected to the two support plates 19 respectively through bearings. Two adjustment plates 6 are also provided in the middle of the adjustment screw 7. The upper part of the adjustment plate 6 is threaded to the adjustment screw 7, and the lower part of the adjustment plate 6 is fixed to the bottom plate of the fixed seat 3. In this way, when the two adjustment plates 6 move linearly on the adjustment screw 7, they will drive the fixed seats 3 to move together. Here, it is necessary to make the length direction of the adjustment hole 4 parallel to the axial direction of the adjustment screw 7.

[0027] Furthermore, the adjusting screw 7 is arranged with threads at both ends in opposite directions. This means that when the adjusting screw 7 rotates, the two adjusting plates 6 move synchronously in opposite directions; that is, the two adjusting plates 6 move closer to each other or further apart, thereby causing the two rollers 2 to move closer to or further apart to adjust the spacing. A rotating handle is also provided at one end of the adjusting screw 7, which facilitates operation and rotation of the adjusting screw 7 by the operator.

[0028] The transmission assembly is located below the base, with the drive unit 8 positioned above it. Specifically, the transmission assembly includes a conveyor belt 9, the drive unit 8, a drive wheel 20 at the output end of the drive unit 8, and a driven wheel 21 at the bottom of the rotating shaft 5. The drive unit 8 is a rotary motor capable of outputting torque, and its output end is connected to the drive wheel 20. The end of the rotating shaft 5 furthest from the rollers 2 is located below the base 1 and is fixedly connected to the driven wheel 21. The conveyor belt 9 is positioned between the drive wheel 20 and the two driven wheels 21. To ensure effective transmission between the drive wheel 20 and the driven wheels 21, and to adjust the tension, an auxiliary wheel 22 is arranged inside the conveyor belt 9. The drive wheel 20, the two driven wheels 21, and the auxiliary wheel 22 are all located within the inner ring of the conveyor belt 9. This ensures that the wheels within the inner ring of the conveyor belt 9 all rotate in the same direction; that is, the two driven wheels 21 rotate in the same direction, and the two rollers 2 rotate in the same direction, thus enabling the needle to rotate.

[0029] Below the base 1, an adjusting wheel assembly is also arranged. The adjusting wheel assembly includes an adjusting rod 10, an adjusting wheel 11, and a connecting rod 12 connecting the adjusting wheel 11 and the adjusting rod 10 together. Specifically, as shown... Figure 5 and Figure 6 As shown, a connecting seat is provided below the base 1. The connecting seat is used to hinge one end of the adjusting rod 10, and the other end of the adjusting rod 10 is connected to the adjusting wheel 11 through the connecting rod 12. The adjusting wheel 11 is located at the lower end of the connecting rod 12 and below the base 1. A limiting part 14 is also provided at the upper end of the connecting rod 12. The limiting part 14 is a disc block structure. Corresponding to this position, there is an elongated hole 13 on the base 1. The width of the elongated hole 13 is smaller than the radial dimension of the limiting part 14. In this way, the limiting part 14 will be locked above the base 1, which can ensure that the adjusting rod 10 is in a horizontal position, which facilitates the adjustment of the adjusting rod 10.

[0030] Similarly, the adjusting rod 10 and the connecting rod 12 are also connected by threads, so that when the adjusting rod 10 is rotated, the limiting part 14 and the adjusting wheel 11 will move along the elongated hole 13 as a whole; thereby adjusting the tension of the conveyor belt 9. It should be noted that the adjusting wheel 11 is located on the outer ring of the conveyor belt 9; and a rotating handle is also provided at one end of the adjusting rod 10 for rotation operation.

[0031] Example 2: Figures 1 to 6 The needle loading mechanism shown includes a base 1, with a friction wheel assembly arranged above the base 1. The friction wheel assembly includes two fixed seats 3 and two rollers 2. The distance between the two fixed seats 3 can be adjusted, thereby changing the distance between the two rollers 2 to accommodate different specifications of needles 18.1 and syringe jackets 18.2. The two rollers 2 are located on the same horizontal line and arranged horizontally. The distance between the two rollers 2 can be just adapted to the diameter of the needle 18.1. When the needle 18.1 passes between the two rollers 2, the rollers 2 can generate a certain radial pressure on the needle 18.1, so that there is a certain friction between the needle 18.1 and the rollers 2. The rotation between the two rollers 2 can drive the needle 18.1 to rotate, thereby screwing the needle 18.1 into the syringe jacket 18.2.

[0032] Specifically, the fixed base 3 is a structure with a hollow cylinder at the top and a plate at the bottom. A rotating shaft 5 is arranged inside the hollow cylinder of the fixed base 3. One end of the rotating shaft 5 extends from the top of the fixed base 3 and is connected to the roller 2. The other end of the rotating shaft 5 extends downward through the base 1 and connects to the transmission assembly, which drives the rotating shaft 5 to rotate. An adjustment hole 4 is provided on the base plate of the fixed base 3, and a corresponding adjustment hole 4 is also provided on the base 1. Bolts are arranged between the adjustment holes 4 on the fixed base 3 and the base 1. After the distance between the two rollers 2 is adjusted, the two fixed bases 3 and the base 1 can be fixed together by the bolts, thus ensuring that the distance between the two rollers 2 does not easily change. The adjustment hole 4 allows the fixed base 3 to move within a certain range on the base 1 to change the distance between the two rollers 2.

[0033] It should be noted that a friction band is arranged on the outer diameter end face of the roller 2. The friction band helps to generate friction between the needle 18.1 and the roller 2, ensuring that the needle 18.1 can be smoothly screwed into the syringe jacket 18.2. In addition, the friction band also has a certain degree of wear resistance, which can effectively extend the service life of the roller 2.

[0034] An adjustment assembly is also provided on the base 1, corresponding to the position of the friction wheel assembly. The adjustment assembly is mainly used to adjust the distance between the two fixed seats 3, that is, the distance between the two rollers 2. Specifically, the adjustment assembly includes two adjustment plates 6, an adjustment screw 7, and two support plates 19. The two support plates 19 are arranged at the edge of the base 1 and are also located on both sides of the friction wheel assembly. The two support plates 19 and the two fixed seats 3 are on the same straight line. An adjustment screw 7 is rotatably connected between the two support plates 19. The two ends of the adjustment screw 7 are rotatably connected to the two support plates 19 respectively through bearings. Two adjustment plates 6 are also provided in the middle of the adjustment screw 7. The upper part of the adjustment plate 6 is threaded to the adjustment screw 7, and the lower part of the adjustment plate 6 is fixed to the bottom plate of the fixed seat 3. In this way, when the two adjustment plates 6 move linearly on the adjustment screw 7, they will drive the fixed seats 3 to move together. Here, it is necessary to make the length direction of the adjustment hole 4 parallel to the axial direction of the adjustment screw 7.

[0035] Furthermore, the adjusting screw 7 is arranged with threads at both ends in opposite directions. This means that when the adjusting screw 7 rotates, the two adjusting plates 6 move synchronously in opposite directions; that is, the two adjusting plates 6 move closer to each other or further apart, thereby causing the two rollers 2 to move closer to or further apart to adjust the spacing. A rotating handle is also provided at one end of the adjusting screw 7, which facilitates operation and rotation of the adjusting screw 7 by the operator.

[0036] The transmission assembly is located below the base, with the drive unit 8 positioned above it. Specifically, the transmission assembly includes a conveyor belt 9, the drive unit 8, a drive wheel 20 at the output end of the drive unit 8, and a driven wheel 21 at the bottom of the rotating shaft 5. The drive unit 8 is a rotary motor capable of outputting torque, and its output end is connected to the drive wheel 20. The end of the rotating shaft 5 furthest from the rollers 2 is located below the base 1 and is fixedly connected to the driven wheel 21. The conveyor belt 9 is positioned between the drive wheel 20 and the two driven wheels 21. To ensure effective transmission between the drive wheel 20 and the driven wheels 21, and to adjust the tension, an auxiliary wheel 22 is arranged inside the conveyor belt 9. The drive wheel 20, the two driven wheels 21, and the auxiliary wheel 22 are all located within the inner ring of the conveyor belt 9. This ensures that the wheels within the inner ring of the conveyor belt 9 all rotate in the same direction; that is, the two driven wheels 21 rotate in the same direction, and the two rollers 2 rotate in the same direction, thus enabling the needle to rotate.

[0037] Below the base 1, an adjusting wheel assembly is also arranged. The adjusting wheel assembly includes an adjusting rod 10, an adjusting wheel 11, and a connecting rod 12 connecting the adjusting wheel 11 and the adjusting rod 10 together. Specifically, as shown... Figure 5 and Figure 6 As shown, a connecting seat is provided below the base 1. The connecting seat is used to hinge one end of the adjusting rod 10, and the other end of the adjusting rod 10 is connected to the adjusting wheel 11 through the connecting rod 12. The adjusting wheel 11 is located at the lower end of the connecting rod 12 and below the base 1. A limiting part 14 is also provided at the upper end of the connecting rod 12. The limiting part 14 is a disc block structure. Corresponding to this position, there is an elongated hole 13 on the base 1. The width of the elongated hole 13 is smaller than the radial dimension of the limiting part 14. In this way, the limiting part 14 will be locked above the base 1, which can ensure that the adjusting rod 10 is in a horizontal position, which facilitates the adjustment of the adjusting rod 10.

[0038] Similarly, the adjusting rod 10 and the connecting rod 12 are also connected by threads, so that when the adjusting rod 10 is rotated, the limiting part 14 and the adjusting wheel 11 will move along the elongated hole 13 as a whole; thereby adjusting the tension of the conveyor belt 9. It should be noted that the adjusting wheel 11 is located on the outer ring of the conveyor belt 9; and a rotating handle is also provided at one end of the adjusting rod 10 for rotation operation.

[0039] An assembly tray 15 is also arranged on the base 1. A support member 23 is provided at the bottom of the assembly tray 15 so that the height of the assembly tray 15 is close to the height of the base 1, and a support foot 24 is also provided at the bottom of the base 1. An installation groove 16 is provided on the outer end face of the assembly tray 15 for placing the syringe jacket 18.2 and the needle 18.1. The assembly tray 15 includes a first tray body 15.1 and a second tray body 15.2. The first tray body 15.1 is located on top, and the second tray body 15.2 is located below the first tray body 15.1. The first tray body 15.1 includes two layers. A first groove is arranged on the outer ring of the first tray body 15.1, so the first groove has two layers. This not only can it accommodate the length of the syringe jacket 18.2, but it can also ensure that the syringe jacket 18.2 can be stably placed on the installation groove 16. The second groove is arranged on the outer ring of the second tray body 15.2. The second groove has only one layer and is used to place the needle 18.1 structure.

[0040] Both the first and second grooves are vertically arranged and aligned in the vertical direction, so that the syringe jacket 18.2 and the needle 18.1 can be aligned, which is beneficial for the assembly of the needle 18.1.

[0041] The assembly plate 15 rotates, causing the syringe jacket 18.2 and needle 18.1 in the mounting groove 16 to rotate. As they pass through the gap between the two rollers 2, the gap between the rollers 2 is adapted to the diameter of the needle 18.1, thus generating friction on the surface of the needle 18.1. After the needle 18.1 passes through the two rollers 2, it will rotate, and finally the needle 18.1 will be screwed into the syringe jacket 18.2.

Claims

1. A needle loading mechanism, characterized in that, The device includes a base on which a friction wheel assembly is provided. The friction wheel assembly includes two horizontally spaced rollers. The rollers are mounted on the base via a fixed seat. The fixed seat and the base are provided with corresponding adjustment holes.

2. The needle loading mechanism according to claim 1, characterized in that, The fixed base is provided with a rotating shaft. One end of the rotating shaft is connected to the roller, and the other end of the rotating shaft passes through the base and is connected to the transmission component.

3. The needle loading mechanism according to claim 1, characterized in that, The base is also provided with an adjustment assembly, which includes an adjustment plate and an adjustment screw. The adjustment plate is threadedly connected to the adjustment screw and is fixedly connected to the fixed base.

4. The needle loading mechanism according to claim 2, characterized in that, The transmission assembly includes a drive device, and the output end of the drive device is provided with a conveyor belt, which is also connected to the rotating shaft in a transmission manner.

5. A needle-loading mechanism according to any one of claims 2 to 4, characterized in that, The rollers rotate in the same direction.

6. The needle loading mechanism according to claim 4, characterized in that, The base is provided with an adjusting wheel assembly on the side near the transmission component. The adjusting wheel assembly includes an adjusting rod and an adjusting wheel. The adjusting wheel is fixed to the adjusting rod and abuts against the conveyor belt.

7. A needle loading mechanism according to claim 6, characterized in that, The adjusting wheel is provided with a connecting rod, and the base is provided with an elongated hole corresponding to the position of the adjusting wheel. One end of the connecting rod passes through the elongated hole and is fixedly connected to the limiting part.

8. A needle loading mechanism according to any one of claims 1 to 4, 6, or 7, characterized in that, It also includes an assembly tray, which has uniformly distributed mounting grooves around its circumference, and the mounting grooves correspond to the positions of the intervals between the two rollers.

9. A needle loading mechanism according to claim 8, characterized in that, The assembly tray includes a first tray body and a second tray body. The first tray body is provided with a first groove, and the second tray body is provided with a second groove. The first groove and the second groove are vertically aligned.

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