A micro bearing flexible transmission system

Abstract

The present invention discloses a flexible transmission system for micro bearings, comprising a flexible metal channel and a power propulsion device; the flexible metal channel has at least one group of unit channels, the unit channels comprising a plurality of metal wires and a plurality of fixings; the power propulsion device comprises two groups of transmission units and a power mechanism arranged relatively; the transmission unit comprises a first pulley, a second pulley and a transmission belt; when the micro bearing is transmitted, the axial direction vertically enters the flexible metal channel, and when passing through the power propulsion device, the end face forms a line contact with the transmission belt, and the transmission belt is partially embedded in the end face hole of the micro bearing after being squeezed to produce plastic deformation, forming a "ratchet" shape, thereby pushing the micro bearing forward. The micro bearing flexible transmission system provided by the present invention can connect the equipment corresponding to each process of the precision machining of the inner and outer rings of the micro bearing in series in the simplest way, so as to realize the automatic transmission of materials.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing manufacturing, and in particular relates to a micro bearing flexible transmission system. Background Art

[0002] Bearings entered the historical stage with the emergence of human industrial civilization. In the 16th century, the Industrial Revolution began in the West. In the mid-18th century, bearings began to appear as independent mechanical components. By the beginning of the 20th century, bearing technology entered a modern development period and a large-scale bearing industry began to form. Entering the 21st century, bearings have become an indispensable basic component in contemporary mechanical equipment and are widely used in various industries of the national economy. Their accuracy, performance, life and reliability play a decisive role in the accuracy, performance, life and reliability of the host.

[0003] The bearing industry, especially the micro-axis industry, is a labor-intensive industry. For example, the precision machining of the inner and outer rings of a micro bearing requires nine processes, including end grinding, centerless grinding, inner hole grinding, cleaning, testing, groove grinding, demagnetization, super-finishing grinding, and cleaning, before it can be put on the assembly line. The nine processes are nine pieces of equipment. How to connect the equipment corresponding to each process in the simplest way to achieve automatic material transmission, and then realize the intelligent management of the online production of these nine processes, reduce labor while greatly improving production efficiency, is a technical problem that needs to be solved urgently in the micro-axis industry.

[0004] At present, some lines in the bearing industry use electric conveyor belts, but this type of conveying method has the disadvantages of large size, high cost, difficulty in maintenance and replacement, and limited equipment placement. In the micro-axis industry, since the outer diameter of the bearing is usually less than 16mm, and the diameter and height ratio of the inner ring of the micro-axis is very small, for example, the outer diameter of the model 684 series micro bearing is 5mm and the height is 4mm, it is still impossible to achieve electric transmission. Most of them can only be replaced by manpower, which requires a lot of manpower costs. Summary of the invention

[0005] In order to solve the above-mentioned deficiencies of the prior art, the present invention provides a micro bearing (inner and outer ring) flexible transmission system, which can simply and efficiently solve a major problem in the micro bearing industry and promote intelligent production management.

[0006] It should be noted that a miniature bearing is usually composed of four parts: an inner ring, an outer ring, rolling balls and a retaining frame. For the convenience of description, the miniature bearing described in the present invention specifically refers to the inner and outer rings in the bearing, that is, the inner ring or outer ring of the miniature bearing is transmitted by the miniature bearing flexible transmission system.

[0007] The micro bearing flexible transmission system disclosed in the present invention comprises a flexible metal channel and a power propulsion device for pushing a micro bearing built in the flexible metal channel to move forward; the flexible metal channel has at least one group of unit channels, and the unit channels are constructed to include a plurality of metal wires arranged in parallel and a plurality of fixing members for passing and fixing the metal wires; the fixing member has a hollow cavity matching the size and shape of the longitudinal section of the micro bearing and a limiting hole arranged on the wall of the hollow cavity and connected to the hollow cavity; the metal wire is passed through the limiting hole to enclose a channel arranged along the length direction of the metal wire; the power propulsion device comprises two groups of transmission units arranged relatively and a power mechanism for driving the transmission unit to rotate; The transmission unit includes a first pulley and a second pulley arranged along the transmission direction of the micro bearing, and a transmission belt sleeved on the first pulley and the second pulley; the first pulley is driven to rotate by a power mechanism and drives the second pulley to rotate together through the transmission belt; the first pulley and the second pulley are arranged between two adjacent metal wires and the thickness of each is smaller than the distance between the two metal wires, and the distance between the two conveyor belts is smaller than the length of the micro bearing; when the micro bearing is transmitted, the axial direction vertically enters the flexible metal channel, and when passing through the power propulsion device, the end face forms a line contact with the conveyor belt, and after the conveyor belt is squeezed, a part of the conveyor belt is embedded in the end hole of the micro bearing to produce plastic deformation, forming a "ratchet" shape, thereby pushing the micro bearing forward.

[0008] As a preferred solution, when there are two or more groups of unit channels, adjacent unit channels are connected end to end by a first connecting member, and the first connecting member also has a hollow cavity that matches the size and shape of the longitudinal section of the micro bearing.

[0009] As a preferred embodiment, the limiting holes of the fixing member include four groups; the first group and the third group arranged relatively to each other each have two limiting holes and the distance between each group of limiting holes is smaller than the inner diameter of the miniature bearing; the second group and the fourth group arranged relatively to each other each have one limiting hole, or each have two limiting holes and the distance between each group of limiting holes is smaller than the length of the miniature bearing.

[0010] As a preferred solution, the flexible metal channel also includes an arc channel for turning, and the arc channel is connected to the unit channel through a second connecting member, and the second connecting member also has a hollow cavity that matches the size and shape of the longitudinal section of the miniature bearing.

[0011] As a preferred solution, the arcuate channel is constructed to have two arcuate plates arranged in parallel, and the distance between the arcuate plates is equal to the outer diameter of the miniature bearing; or the arcuate channel is constructed to be formed by bending a metal wire.

[0012] As a preferred solution, the transmission unit also includes an intermediate wheel arranged between the first pulley and the second pulley, and the thickness of the intermediate wheel is also smaller than the distance between the two metal wires; the first pulley is driven to rotate by the power mechanism and drives the intermediate wheel and the second pulley to rotate together through the transmission belt.

[0013] As a preferred solution, the diameters of the first pulley and the second pulley are equal, and the diameter of the intermediate pulley is smaller than the diameter of the first pulley.

[0014] As a preferred solution, the transmission unit also includes a driving gear connected to the power mechanism and a driven gear meshing with the driving wheel, and the driven gear is connected to the first pulley through a bearing; when the driving gear is driven to rotate by the power mechanism, the first pulley is driven to rotate through the driven gear, and then the second pulley is driven to rotate together through the transmission belt.

[0015] As a preferred solution, the transmission belt is a rubber belt; the material of the metal wire is stainless steel wire or steel wire; and the power mechanism is a DC motor.

[0016] As a preferred solution, the micro-bearing flexible transmission system also includes a supporting device for supporting the flexible metal channel and / or a protective cover arranged on the power propulsion device.

[0017] The present invention has the following beneficial effects:

[0018] (1) The micro-bearing flexible transmission system provided by the present invention is formed into a flexible metal channel by metal wires. During the transmission process, the micro-bearings are mostly in point contact, the friction is small, and the visibility is very strong, which is convenient for fault detection and maintenance. The cost is also lower than that of ordinary transmission pipelines.

[0019] (2) The present invention applies the "ratchet" principle to the micro-bearing flexible transmission system, and through the synergistic effect of the flexible metal channel, micro-bearing and the related structures of the power propulsion device, the automatic transmission of the micro-bearing is very cleverly achieved.

[0020] (3) The micro-bearing flexible transmission system provided by the present invention can connect the equipment corresponding to each process of precision machining of the inner and outer rings of micro-bearings in series in the simplest way, realize the automatic transmission of materials (micro-bearings), and then realize intelligent production management, greatly improve production efficiency and reduce labor costs.

[0021] (4) The micro-bearing flexible transmission system provided by the present invention has a relatively simple overall composition and structure, low manufacturing cost, small space occupation, high flexibility, and convenient replacement. It can also be infinitely extended and arbitrarily bent like a cable, and can pass through walls to connect production processes in different workshops and on different floors, thereby achieving extremely low-cost uninterrupted feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the overall structural schematic diagram of the micro bearing flexible transmission system;

[0023] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle Ia region;

[0024] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the middle Ib region;

[0025] Figure 4 is a schematic diagram of the structure of the fixing part;

[0026] Figure 5 is another structural schematic diagram of the connecting member;

[0027] Figure 6 for Figure 1 A schematic diagram of the enlarged structure of the middle Ic region;

[0028] Figure 7 is a schematic diagram of the structure of the supporting device;

[0029] Figure 8 The overall structure of the propulsion device is shown in Figure 1. Figure 1 ;

[0030] Fig. 9 Schematic diagram of the internal structure of the propulsion device Figure 1 ;

[0031] Fig.10 Working principle of the flexible transmission system for micro bearings Figure 1 (The miniature bearings do not enter the power propulsion device);

[0032] Fig.11 Working principle of the flexible transmission system for micro bearings Figure 2 (Miniature bearings enter the power propulsion device);

[0033] Fig.12 Schematic diagram of the application of micro bearing flexible transmission system Figure 1 ;

[0034] Fig.13 Schematic diagram of the application of micro bearing flexible transmission system Figure 2 ;

[0035] The accompanying drawings are marked with: metal flexible channel 1, unit channel 11, connecting piece 12, metal wire 13, fixing piece 14, hollow cavity 15, limiting hole 16, connecting hole 17; power propulsion device 2, first pulley 21, intermediate pulley 22, second pulley 23, rubber belt 24, driving gear 25, driven gear 26, DC motor 27, protective cover 28; 90 degree elbow 3, arc channel 31, connecting piece 32; supporting device 4, base 41, mounting piece 42, slot 43; miniature bearing 5; gathering device 6; miniature bearing 7. DETAILED DESCRIPTION

[0036] The present invention is further explained in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 1 As shown, the embodiment discloses a flexible transmission system for conveying micro bearings, which mainly includes a metal flexible channel 1 and a power propulsion device 2, wherein the metal flexible channel 1 serves as a transmission channel for the micro bearings, and the power propulsion device 2 is used to push the micro bearings in the transmission channel forward to realize the transmission of the micro bearings.

[0038] Combination Figures 2 to 7 As shown, the metal flexible channel 1 has at least one group of unit channels 11, and adjacent unit channels 11 are connected by a connector 12. Each unit channel 11 includes multiple metal wires 13 and multiple fixing members 14 distributed at intervals. The length of the unit channel 11 is also usually determined by the length of the metal wire 13. For example, the length can be 1 to 6 meters. The lengths of each unit channel 11 are not required to be completely consistent and can be adjusted according to the application scenario. The metal wire 13 can be a stainless steel wire, or an ordinary steel wire, or other metal materials. The diameter of the metal wire 13 can be 1.2 to 4 mm and can be bent according to the application scenario. The fixing member 14 is mainly used to penetrate and fix the metal wire 13, so that multiple metal wires 13 are enclosed into a transmission channel arranged along the length direction. The fixing member 14 is constructed to have a hollow cavity 15 that matches the size and shape of the longitudinal section of the micro bearing and a plurality of limiting holes 16 arranged on the wall of the hollow cavity and connected to the hollow cavity 15, and the metal wire 13 is penetrated in the limiting hole 16.

[0039] like Figure 4As shown, in the embodiment, the fixing member 14 has four pairs of limiting holes 16 arranged relatively up and down and left and right. Correspondingly, there are eight metal wires 13 passing through the limiting holes 16 of the fixing member 14. After the micro bearing 5 enters the metal flexible channel 1 axially and vertically, the two end faces form four-point contact with the metal wire 13 respectively, and the circumferential outer wall also forms four-point contact with the metal wire 13. Through this point contact, the friction between the micro bearing 5 and the metal wire 13 can be reduced as much as possible to ensure the smoothness of transmission. The number of limiting holes on the circumferential outer wall of the hollow cavity 15 can be adjusted according to the length of the micro bearing. For example, when the length of the micro bearing is short, only one limiting hole on the left and right can be set.

[0040] Connectors 12 are usually provided at both ends of the unit channel 14, and adjacent unit channels 11 are connected by the connectors 12. The connectors 12 also need to meet the requirement of not hindering the transmission of the micro bearing, that is, the connector 12 itself also has a hollow cavity that matches the size and shape of the longitudinal section of the micro bearing. Therefore, the connector 12 can be obtained by improving the structure of the fixing member 14. In other words, the connector 12 itself is also a special fixing member 14. Figure 5 As shown, in the embodiment, the connecting member 12 is further provided with a connecting hole 17 based on the structure of the fixing member 14, and two adjacent unit channels 11 can be threadedly connected through the connecting hole 17. Of course, two adjacent unit channels 11 can also be connected by other means such as snap connection, plug connection, welding, etc., and the connecting mechanism of the connecting member 12 is not limited thereto.

[0041] The metal flexible channel 1 is usually also provided with a 90-degree elbow 3, which is mainly used for the diversion of the transmission channel. If it is a straight channel, the 90-degree elbow 3 may not be provided. The 90-degree elbow 3 includes an arc channel 31 and a connector 32, and the arc channel 31 is fixedly connected to the unit channel 11 through the connector 32. Figure 3 As shown, the 90-degree elbow 3 at the feed port of the power device 2, its arc channel 31 is constructed by directly bending a metal wire. In this case, the connecting piece 32 is the fixing piece 14 or the connecting piece 12; or, as in the 90-degree elbow 3 at the discharge port of the power device 2, its arc channel 31 is constructed as having two parallelly arranged arc plates, for example, 0.5 mm thick stainless steel plates can be welded, and the distance between the arc plates is equal to or slightly larger than the outer diameter of the miniature bearing, one end of the connecting piece 32 can be fixedly connected to the arc plate by welding, and the other end can also be connected to the fixing piece 14 or the connecting piece 12 by welding, clamping, plugging, etc., and then connected to the unit channel 11.

[0042] In the same workshop, adjacent processes can be connected through the metal flexible channel 1. In some special application scenarios, the micro bearing flexible transmission system may need to be installed in different workshops or on different floors. In this case, the metal flexible channel 1 will be longer. In order to prevent the metal flexible channel 1 from tilting downward and deforming due to gravity, Figure 7 As shown, multiple support devices 4 can be arranged at intervals to ensure smooth transmission of the micro bearings in the metal flexible channel 1. The support device 4 has a base 41 and a mounting member 42 fixed on the base 41, and the mounting member 42 is provided with a slot 43 for clamping the fixing member in the metal flexible channel 1. When the metal flexible channel 1 is installed in workshops on different floors, since the space occupied by the metal flexible channel 1 is very small, a similar pipeline design can be adopted, and holes can be opened between floors, thereby realizing material transmission at a very low cost.

[0043] A metal flexible channel 1 generally includes a plurality of power propulsion devices 2, one, two or more of which may be arranged in each unit channel 11, or may be arranged according to the length requirement of the unit channel 11, for example, one power propulsion device 2 may be arranged every 1.5 meters. The power propulsion device 2 is specifically arranged between adjacent fixing members 14 in the unit channel 11.

[0044] Combination Figures 8 to 13 As shown, the power propulsion device 2 mainly includes two groups of pulleys arranged in the axial direction of the metal flexible channel 1, two groups of gears for connecting the pulleys and the DC motor, a DC motor 27 for driving the gears to rotate, and a protective box 28 for covering the pulleys and gears. Among them, the pulleys include a first pulley 21, an intermediate pulley 22, a second pulley 23 and a rubber belt 24. The first pulley 21, the intermediate pulley 22 and the second pulley 23 are arranged along the transmission direction of the miniature bearing; the rubber belt 24 is preferably a polyurethane rubber belt, which is sleeved on the first pulley 21, the intermediate pulley 22 and the second pulley 23. The gears include a driving gear 25 and a driven gear 26. The driven gear 26 is connected to the first pulley 21 through a bearing and meshes with the driving gear 25. Both driving gears 25 are connected to the DC motor 27.

[0045] It should be noted that the two sets of pulleys are respectively located between the two metal wires on the end face of the miniature bearing. The thickness of the first pulley 21, the intermediate pulley 22 and the second pulley 23 should be smaller than the distance between the two metal wires on the end face of the miniature bearing. Similarly, the width of the rubber belt 24 should also be smaller than the distance between the two metal wires on the end face of the miniature bearing. Moreover, the distance between the two relatively arranged rubber belts 24 should be smaller than the length of the miniature bearing (along the axial direction).

[0046] When the DC motor 27 is working, the driving gear 25 is driven by the DC motor 27 to rotate, and then drives the driven gear 26 to rotate. The driven gear 26 drives the first pulley 21 to rotate through the bearing, and then drives the intermediate wheel 22 and the second pulley 23 to rotate through the rubber belt 24. Fig.11 and Fig.12 As shown, after the micro bearing 5 enters the pulley, the end face of the micro bearing 5 forms a line contact with the rubber belt 24. Since the distance between the two groups of rubber belts 24 is less than the length of the micro bearing, when the rubber belt 24 contacts the end face of the micro bearing, the rubber belt is squeezed by the micro bearing, and part of it is embedded in the end face hole (i.e., the port) of the micro bearing to produce plastic deformation, forming a "ratchet shape". The two rubber belts 24 move in opposite directions, but the parts in contact with the micro bearing are both in the forward direction of the micro bearing, thereby pushing the micro bearing forward. It should be noted that in this process, in order to make full use of the characteristics of the rubber belt, an intermediate wheel 22 is particularly provided in each group of pulleys to increase more "ratchet shapes" and thereby increase the propulsion power.

[0047] Combination Fig.13 and Fig.12 The application schematic diagram of the micro bearing flexible transmission system is shown, the feed end of the micro bearing flexible transmission system is connected to the discharge port of the material collecting device 6, and the discharge end is connected to the feed port of the material collecting device 6 or directly connected to the feed port of the equipment. The disorderly micro bearings are arranged in order according to their own weight through the discharge port of the material collecting device 6, and enter the micro bearing flexible transmission system axially, thereby realizing the automatic transmission of the micro bearings. During the transmission process, the rotation speed of the pulley can be adjusted by the controller of the DC motor 27, and then the moving speed of the micro bearing can be adjusted to realize intelligent control.

[0048] Finally, it should be noted that although the embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative and instructive, rather than restrictive. Under the guidance of this specification, a person of ordinary skill in the art can also make many forms without departing from the scope of protection of the claims of the present invention, all of which belong to the scope of protection of the present invention.

Claims

1. A micro bearing flexible transmission system, characterized in that: It includes a flexible metal channel and a power propulsion device for pushing a micro bearing built into the flexible metal channel to move forward; The flexible metal channel has at least one group of unit channels, and the unit channels are constructed to include a plurality of metal wires arranged in parallel and a plurality of fixing members for passing through and fixing the metal wires; the fixing member has a hollow cavity matching the size and shape of the longitudinal section of the miniature bearing and a limiting hole arranged on the wall of the hollow cavity and connected to the hollow cavity; the metal wires are passed through the limiting holes to enclose a channel arranged along the length direction of the metal wires; The power propulsion device comprises two sets of transmission units arranged opposite to each other and a power mechanism for driving the transmission units to rotate; the transmission unit comprises a first pulley and a second pulley arranged along the transmission direction of the miniature bearing, and a transmission belt sleeved on the first pulley and the second pulley; the first pulley is driven to rotate by the power mechanism and drives the second pulley to rotate together through the transmission belt; the first pulley and the second pulley are arranged between two adjacent metal wires and their thicknesses are both less than the distance between the two metal wires, and the distance between the two transmission belts is less than the length of the miniature bearing; When the miniature bearing is being transported, it enters the flexible metal channel axially and vertically. When passing through the power propulsion device, the end face forms a line contact with the conveyor belt. After being squeezed, the conveyor belt is partially embedded in the end hole of the miniature bearing and produces plastic deformation, forming a "ratchet" shape, which in turn pushes the miniature bearing forward.

2. The micro bearing flexible transmission system according to claim 1, characterized in that: When there are more than two groups of unit channels, adjacent unit channels are connected end to end by a first connecting member, and the first connecting member also has a hollow cavity that matches the size and shape of the longitudinal section of the micro bearing.

3. The micro bearing flexible transmission system according to claim 1, characterized in that: The limiting holes of the fixing member include four groups; the first group and the third group arranged relatively to each other each have two limiting holes and the distance between each group of limiting holes is smaller than the inner diameter of the miniature bearing; the second group and the fourth group arranged relatively to each other each have one limiting hole, or each have two limiting holes and the distance between each group of limiting holes is smaller than the length of the miniature bearing.

4. The micro bearing flexible transmission system according to any one of claims 1 to 3, characterized in that: The flexible metal channel also includes an arc channel for turning, and the arc channel is connected to the unit channel through a second connecting member, and the second connecting member also has a hollow cavity that matches the size and shape of the longitudinal section of the miniature bearing.

5. The micro bearing flexible transmission system according to claim 4, characterized in that: The arc-shaped channel is constructed to have two arc-shaped plates arranged in parallel, and the distance between the arc-shaped plates is equal to the outer diameter of the miniature bearing; or the arc-shaped channel is constructed to be formed by bending a metal wire.

6. The micro bearing flexible transmission system according to claim 1, characterized in that: The transmission unit also includes an intermediate wheel arranged between the first pulley and the second pulley, and the thickness of the intermediate wheel is also smaller than the distance between the two metal wires; the first pulley is driven to rotate by the power mechanism and drives the intermediate wheel and the second pulley to rotate together through the transmission belt.

7. The micro bearing flexible transmission system according to claim 6, characterized in that: The diameters of the first pulley and the second pulley are equal, and the diameter of the intermediate pulley is smaller than the diameter of the first pulley.

8. The micro bearing flexible transmission system according to claim 1, characterized in that: The transmission unit also includes a driving gear connected to the power mechanism and a driven gear meshed with the driving wheel, and the driven gear is connected to the first pulley through a bearing; when the driving gear is driven to rotate by the power mechanism, the first pulley is driven to rotate through the driven gear, and then the second pulley is driven to rotate together through the transmission belt.

9. The micro bearing flexible transmission system according to claim 1, characterized in that: The transmission belt is a rubber belt; the material of the metal wire is steel wire; and the power mechanism is a DC motor.

10. The micro bearing flexible transmission system according to claim 1, characterized in that: It also includes a supporting device for supporting the flexible metal channel and / or a protective cover arranged on the power propulsion device.

Images