Driving roller for needle detector

Abstract

The utility model provides a driving roller for a needle detector, which comprises a roller body, the roller body is a non-metal roller body, two ends of the roller body are respectively provided with a top block, and the top blocks are made of graphite composite materials. A through hole is formed in the top block, and a conical groove is formed in the outer end face of the top block; comprising a top shaft, a conical head is arranged at one end of the top shaft, the conical head abuts against the conical groove in a matched mode, a screwdriver embedding groove is formed in the other end of the top shaft, and a first fixing nut and a second fixing nut are connected to a shaft body of the top shaft in a threaded mode. The through hole, the conical groove, the top shaft and the conical head are all coaxial with the roller body. The non-metal roll shaft solves the technical problems of prolonging the service life of the non-metal roll shaft and quickly replacing the non-metal roll shaft in the prior art.

Description

Technical Field

[0001] The utility model relates to the field of mechanical engineering, in particular to the field of roller shafts, in particular to a transmission roller for a needle detector. Background Art

[0002] The needle detector, also known as the ferromagnetic metal sensing instrument, is a device that detects metal foreign objects such as broken needles in textiles through a strong magnetic field. In the existing technology, the roller used in the needle detector is a traditional roller, that is, a transmission roller with a metal core and an outer layer wrapped with an anti-slip material. This traditional roller must be kept away from the detection channel of the needle detector to avoid interference with the detection caused by the metal core of the roller during metal detection.

[0003] However, with the development of technology and the continuous changes in application scenarios, needle detectors have gradually become smaller and faster, and the conveyor belt distance of needle detectors has become shorter. The transmission roller inevitably needs to be installed close to the detection channel, which creates the following problems:

[0004] 1. If the roller shaft core and bearing are made of metal, it will cause serious interference to the metal detection process of the needle detector;

[0005] 2. If the roller shaft core is made of non-metallic material, compared with metal materials, non-metallic materials have poorer mechanical properties such as wear resistance, lubricity, and high temperature resistance. After wear, the circular runout amplitude increases and the noise increases, which may cause the machine to stop in severe cases.

[0006] 3. Non-metallic rollers are prone to wear and need to be replaced frequently. Traditional bearing installation methods make them difficult to disassemble and replace. Summary of the Invention

[0007] The purpose of the utility model is to provide a transmission roller for a needle detector, which solves the technical problems of increasing the service life of non-metallic rollers and enabling rapid replacement in the prior art.

[0008] A transmission roller for a needle detector comprises a roller body, which is a non-metallic roller body. Both ends of the roller body are respectively provided with a top block, and the top block is made of a graphite composite material; a through hole is provided on the top block, and a conical groove is provided on the outer end surface of the top block; it comprises a top shaft, one end of the top shaft is provided with a conical head, the conical head cooperates and abuts with the conical groove, the other end of the top shaft is provided with a screwdriver engagement groove, and the shaft body of the top shaft is threadedly connected with a first fixing nut and a second fixing nut; the through hole, the conical groove, the top shaft, and the conical head are all coaxial with the roller body.

[0009] Furthermore, the roller body is hollow, and inner steps are provided at both ends of the roller body, and the top block is detachably connected to the inner steps.

[0010] Furthermore, the screwdriver engaging groove is a slotted groove.

[0011] The working principle of this utility model:

[0012] If non-metallic rollers are to replace metal rollers, they need to address multiple issues, including wear resistance, lubrication, and high-temperature resistance. The present invention provides top blocks made of a graphite composite material at both ends of the non-metallic roller body. Graphite has a flaky crystal structure, excellent lubrication, and excellent electrical and thermal conductivity, wear resistance, pressure resistance, temperature resistance, and chemical stability, making it an ideal non-metallic alternative. However, the wear rate of graphite composites is still faster than that of metals. Therefore, the present invention uses the conical head of the top shaft to cooperate with the conical groove of the top block, and installs the roller body by abutting and clamping the two ends of the roller body.

[0013] When the top block wears out after a period of use, you can insert a screwdriver into the screwdriver slot at the other end of the top shaft and screw the top shaft in toward the top block to re-engage the conical head and conical slot, thereby extending the life of the top block. Unscrew the top shaft away from the top block to quickly remove the roller for replacement.

[0014] Compared with the existing technology, the effects of this utility model are positive and obvious:

[0015] 1. The roller body of the utility model is a non-metallic roller body, and the conical head cooperates with the conical groove of the top block. The roller body is installed by abutting and clamping the two ends of the roller body, replacing the traditional metal roller core structure, thereby avoiding interference with the metal detection process.

[0016] 2. The utility model screws the top shaft into the top block through a screwdriver, so that the conical head and the conical groove are more closely matched, thereby increasing the service life of the top block.

[0017] 3. The utility model can quickly remove the roller body for replacement by unscrewing the top shaft away from the top block with a screwdriver.

[0018] 4. The top block of the utility model is detachably connected to the roller body, which makes it easy to replace the top block separately from the roller body, reducing the cost of consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 .Schematic diagram of the local structure of one end of the roller body in an embodiment of the present utility model.

[0020] Figure 2 .Schematic diagram of the cross-sectional structure of the roller body in the embodiment of the present utility model.

[0021] Figure 3 . Schematic diagram of the installation of the top shaft in the embodiment of the utility model.

[0022] Figure 4. Schematic diagram of the application of an embodiment of the utility model in a needle detector.

[0023] In the figure: 1 roller body; 2 top block; 201 conical groove; 202 through hole; 3 top shaft; 301 conical head; 302 screwdriver fitting groove; 4 first fixing nut; 5 second fixing nut; 6 mounting hole; 7 needle detection channel. DETAILED DESCRIPTION

[0024] The following examples will further illustrate the present invention, but are not intended to limit the present invention.

[0025] like Figures 1 to 4 As shown, this embodiment provides a transmission roller for a needle detector. The transmission roller is installed on both sides of a needle detection channel 7 close to the small needle detector.

[0026] The drive roller includes a roller body 1, primarily made of fiberglass. A top block 2, made of a graphite composite material (such as the copper-based graphite self-lubricating composite material disclosed in patent CN105256168A), is located at each end of the roller body 1. Both the roller body 1 and the top block 2 are made of non-metallic materials to avoid interference during metal detection.

[0027] A through hole 202 is provided on any top block 2 along the axis of the top block 2, and a conical groove 201 is provided on the outer end surface of the top block 2; the roller body 1 is a hollow roller body 1, and the inner sides of both ends of the roller body 1 are respectively provided with a circle of inner steps that are larger than the inner diameter of the roller body 1. The top block 2 is placed in the inner step, which is convenient for replacing the top block 2 separately from the roller body 1, reducing the cost of consumables.

[0028] The roller assembly comprises a top shaft 3 with a conical head 301 at one end. The inclined surface of the conical head 301 engages with the conical groove 201, and the tip of the conical head 301 rests within the through-hole 202. The frictional connection between the inclined surfaces of the conical head 301 and the conical groove 201 replaces the traditional rotational connection between the roller shaft and the bearing. The through-hole 202, conical groove 201, top shaft 3, and conical head 301 are all coaxial with the roller body 1, ensuring stable rotation of the roller body 1.

[0029] The other end of the top shaft 3 is provided with a slotted screwdriver engaging groove 302. The shaft body of the top shaft 3 is provided with a thread. The top shaft 3 is screwed out away from the top block 2 by a screwdriver, and the roller body 1 can be quickly removed for replacement.

[0030] The first fixing nut 4 and the second fixing nut 5 are threadedly connected to the shaft body of the top shaft 3; the first fixing nut 4 and the second fixing nut 5 are clamped and tightened from both sides to install the top shaft 3 on the installation surfaces on both sides of the conveyor belt of the needle detector. Specifically, mounting surfaces for installing rollers are provided on both sides of the conveyor belt, and mounting holes 6 are opened on the mounting surfaces. After the top shaft 3 passes through the mounting holes 6, the first fixing nut 4 and the second fixing nut 5 are respectively connected to the shaft body of the top shaft 3 by threaded connection from both sides of the fixing surface, and are tightened toward the fixing surface respectively. The top shaft 3 is fixed on the fixing surface by clamping and tightening from both sides of the fixing surface, thereby realizing the installation and fixation of the top shaft 3.

[0031] How to use the embodiment:

[0032] In this embodiment, the conical head 301 of the top shaft 3 cooperates with the conical groove 201 of the top block 2, and the roller body 1 is installed by abutting and clamping the two ends of the roller body 1.

[0033] During connection, the inclined surface of the conical head 301 fits and abuts against the conical groove 201, and the cone tip of the conical head 301 falls into the through hole 202. The friction connection between the inclined surface of the conical head 301 and the inclined surface of the conical groove 201 replaces the traditional rotational connection between the roller and the bearing.

[0034] After the top block 2 has been used for a period of time, the contact surface between the top block 2 and the top shaft 3 will be worn. At this time, a screwdriver can be inserted into the screwdriver engagement groove 302 of the top shaft 3, and the top shaft 3 can be screwed into the top block 2 based on the installation surface, so that the conical head 301 and the conical groove 201 fit more tightly, and the cone tip of the conical head 301 falls back into the through hole 202, thereby increasing the service life of the top block 2.

[0035] When the roller body 1 needs to be removed, the top shaft 3 is screwed out in a direction away from the top block 2, and the roller body 1 can be quickly removed for replacement.

[0036] When the top block 2 needs to be replaced, the top block 2 is taken out from the inner step of the roller body 1 and the top block 2 is replaced separately.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A transmission roller for a needle detector, characterized in that: The roller body (1) comprises a non-metal roller body, and top blocks (2) are respectively provided at both ends of the roller body (1), and the top blocks (2) are made of a graphite composite material; A through hole (202) is provided on the top block (2), and a conical groove (201) is provided on the outer end surface of the top block (2); The top shaft (3) comprises a cone head (301) provided at one end of the top shaft (3), the cone head (301) being in contact with the cone groove (201), a screwdriver engaging groove (302) being provided at the other end of the top shaft (3), and a first fixing nut (4) and a second fixing nut (5) being threadedly connected to the shaft body of the top shaft (3); The through hole (202), the conical groove (201), the top shaft (3), and the conical head (301) are all coaxial with the roller body (1).

2. The transmission roller for a needle detector according to claim 1, characterized in that: The roller body (1) is hollow, and inner steps are provided at both ends of the roller body (1), and the top block (2) is detachably connected to the inner steps.

3. The transmission roller for a needle detector according to claim 1, characterized in that: The screwdriver engaging groove (302) is a slotted groove.

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