Inner race feeding apparatus and method

Abstract

The application relates to the technical field of bearing processing, in particular to an inner ring feeding device and method. The inner ring feeding device comprises a first fixed pipe, a second fixed pipe and a flexible assembly comprising a first flexible section and a second flexible section; the first fixed pipe, the first flexible section, the second flexible section and the second fixed pipe are sequentially connected and form a feeding channel; the first flexible section is arranged in a semicircular shape; the feeding direction of the feeding channel is from top to bottom; the central axis of the first fixed pipe is arranged at intervals with the central axis of the second fixed pipe; the preparation state of the feeding device comprises that the minimum included angle alpha between the arc surface normal of the first flexible section and the feeding direction of the first fixed pipe is less than or equal to a set value; the feeding state of the feeding device comprises that the arc surface of the first flexible section is extruded by the inner ring so that the minimum included angle alpha is reduced. Thus, the problem that the surface of the inner ring is damaged due to collision in the conveying process of the inner ring feeding device is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing processing, in particular to an inner ring feeding device and method. BACKGROUND

[0002] As a precision mechanical basic part, the inner ring of a bearing is widely used in high-end equipment fields such as automobiles, machine tools, and wind power, and the surface quality of the inner ring directly affects the precision, service life, and operation reliability of the bearing. In order to realize automatic feeding of the inner ring grinding production line, a conveying channel is usually used for transmission, and a rigid metal pipeline is generally used as the conveying channel in the prior art.

[0003] However, since the channel is a rigid structure, it cannot effectively absorb or buffer the collision energy, which causes the outer circumferential surface of the inner ring workpiece to be easily damaged by knocking, scratching, or indentation. These damages cannot be eliminated in subsequent precision grinding processing, resulting in an increase in product defect rate and production cost, and also affecting the final use performance and reliability of the bearing. Therefore, it is urgent to develop a new type of inner ring feeding device that can fundamentally alleviate the problem of surface damage of the inner ring caused by collision during the transportation of the inner ring. SUMMARY

[0004] To solve the problem of surface damage of the inner ring caused by collision during the conveying process of the inner ring feeding device, the present application provides an inner ring feeding device and method.

[0005] In a first aspect, the present application provides an inner ring feeding device, comprising:

[0006] a first fixed pipe;

[0007] a second fixed pipe;

[0008] a flexible assembly comprising a first flexible section and a second flexible section; the first fixed pipe, the first flexible section, the second flexible section, and the second fixed pipe are connected in sequence and form a feeding channel; the first flexible section is arranged in a semicircular shape;

[0009] The feeding direction of the feeding channel is from top to bottom; the center axis of the first fixed pipe is arranged at an interval from the center axis of the second fixed pipe;

[0010] The preparation state of the feeding device includes that the minimum included angle a between the normal line of the arc surface of the first flexible section and the feeding direction of the first fixed pipe is less than or equal to a set value;

[0011] The feeding state of the feeding device includes that the arc surface of the first flexible section is pressed by the inner ring, so that the minimum included angle a is reduced.

[0012] In some embodiments, the set value is greater than 0° and less than 60°.

[0013] In some embodiments, the first flexible section and the second flexible section are integrally formed and spirally arranged along a central axis of the first flexible section and the second flexible section, wherein the central axis of the first flexible section and the second flexible section is a curve.

[0014] In some embodiments, the minimum pitch of the first flexible section is smaller than the minimum pitch of the second flexible section.

[0015] In some embodiments, the first fixed tube is provided with a plurality of first guide fins and a guide plate.

[0016] The first fixed tube comprises a plurality of first fixed plates, which enclose and form a first accommodating space penetrating in the feeding direction, and the plurality of first guide fins and the guide plate are arranged in the first accommodating space in sequence in the feeding direction; wherein the first guide fin and the guide plate are connected with a first fixed plate and extend to the central axis of the first fixed tube by a first preset distance; the guide plate is inclined to the side close to the first flexible section at a preset angle.

[0017] In some embodiments, the second fixed tube is provided with a plurality of second guide fins.

[0018] The second fixed tube comprises a plurality of second fixed plates, which enclose and form a second accommodating space penetrating in the feeding direction, and the plurality of second guide fins are arranged in the second accommodating space in the feeding direction, wherein the second guide fin is connected with a second fixed plate and extends to the central axis of the second fixed tube by a second preset distance.

[0019] In some embodiments, the inner ring feeding device further comprises:

[0020] The inclined sliding assembly comprises an inclined sliding channel and an elastic pad and a sensor arranged in the inclined sliding channel, and the inclined sliding channel is movably connected with an end of the second fixed tube away from the flexible assembly; the inclined sliding channel is provided with a conveying groove in a direction perpendicular to the feeding direction, and the elastic pad and the sensor are located in the conveying groove and below the orthographic projection of the second flexible section.

[0021] In some embodiments, the inner ring feeding device further comprises:

[0022] The carrying assembly comprises a horizontal carrying unit, a vertical carrying unit and a clamping unit; the horizontal carrying unit is slidably connected with the vertical carrying unit, and the vertical carrying unit is movably connected with the clamping unit, and the clamping unit is used for clamping the inner ring.

[0023] In a second aspect, the present application provides an inner ring feeding method, which is applied to the inner ring feeding device in the first aspect, and the inner ring feeding method comprises:

[0024] Based on the triggering of the feeding instruction, the inner ring is put into the first fixed tube;

[0025] The inner ring enters the first fixed pipe and falls into the first flexible section along the feeding channel under the action of gravity; wherein, the inner ring contacts and extrudes the arc surface of the first flexible section, and the minimum included angle a becomes smaller;

[0026] The inner ring sequentially passes through the second flexible section and the second fixed pipe from the first flexible section along the feeding channel.

[0027] In some embodiments, after sequentially passing through the second flexible section and the second fixed pipe from the first flexible section along the feeding channel, the inner ring further comprises:

[0028] The inner ring falls into the conveying groove along the feeding channel, and the sensor identifies whether the inner ring stays in the conveying groove for a preset time length; if the inner ring stays for the preset time length, the introduction of another inner ring is stopped; wherein, the sensor is located in the conveying groove and under the orthographic projection of the second flexible section.

[0029] To solve the problem of surface damage of the inner ring caused by collision during the conveying process of the inner ring feeding device, the present application has the following advantages:

[0030] The inner ring feeding device comprises a first fixed pipe, a flexible assembly and a second fixed pipe connected in sequence, which form a feeding channel for feeding the inner ring; the flexible assembly comprises a first flexible section and a second flexible section connected in sequence, and the minimum included angle a between the normal line of the arc surface of the first flexible section and the feeding direction of the first fixed pipe is less than or equal to a set value, that is, the first flexible section in the preparation state presents a relatively smooth and moderate semicircular shape, and the inner ring makes a curve sliding after falling into the first flexible section, which reduces the impact of the inner ring during the feeding process and reduces the probability of excessive wear or damage while ensuring the transportation efficiency; and in the feeding state, the first flexible section has a rebounding force, and after the inner ring falls into the first flexible section, the minimum included angle a of the arc surface of the first flexible section will become smaller after being extruded by the inner ring, and the rebounding can provide a buffering effect for the falling of the inner ring, further reducing the problem of excessive wear or damage of the inner ring caused by impact during the feeding process, and reducing the product failure rate and production cost. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A cross-sectional view of an embodiment of the inner ring feeding device is shown;

[0032] Figure 2 A structural schematic diagram of an embodiment of the inner ring feeding device is shown;

[0033] Figure 3 A schematic diagram of part A of an embodiment of the inner ring feeding device is shown;

[0034] Figure 4 A top view schematic diagram of an embodiment of the inclined sliding assembly is shown;

[0035] Figure 5 A structural schematic diagram of an embodiment of the inclined sliding assembly is shown;

[0036] Figure 6 A flowchart illustrating another embodiment of the inner ring feeding method is shown;

[0037] Figure 7 Another flowchart illustrating another embodiment of the inner ring feeding method is shown.

[0038] Reference Signs:

[0039] 10, first fixing assembly; 11, conical tube; 12, first fixing unit; 121, first fixing tube; 1211, first fixing plate; 1212, first accommodating space; 122, first guiding tab; 123, guiding plate; 20, flexible assembly; 21, first flexible section; 22, second flexible section; 30, second fixing assembly; 31, second fixing tube; 311, second fixing plate; 312, second accommodating space; 32, second guiding tab; 40, inclined sliding assembly; 41, inclined sliding way; 42, elastic pad; 43, sensor; 44, conveying groove; 50, inner ring; 60, carrying assembly; 61, horizontal carrying unit; 62, vertical carrying unit; 63, clamping unit. DETAILED DESCRIPTION

[0040] The present disclosure will now be discussed with reference to several example embodiments. It should be appreciated that these embodiments are discussed only to better illustrate the present disclosure and are not intended to limit the scope of the present disclosure in any way.

[0041] As used herein, the term "includes" and its variants are to be read as open-ended terms that mean "including, but not limited to." The term "based on" is to be construed as "based at least in part on." The terms "one embodiment" and "an embodiment" are to be read as "at least one embodiment." The term "another embodiment" is to be read as "at least one other embodiment." The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and similar terms are used for orientation or positional relationship based on the orientation or position as shown in the drawings. These terms are used merely for the purpose of description and are not intended to limit the indicated device, element, or component to a particular orientation or configuration, unless specified herein. Also, the terms "mount," "set," "provided with," "connected," "linked" should be interpreted broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; or it can be internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "first," "second," and the like are mainly used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "multiple" is two or more.

[0042] The bearing inner ring is a precise rotating core component, which has the characteristics of high precision, high wear resistance and high reliability, and is widely used in high-end equipment fields such as automobile wheel hub, gearbox, machine tool spindle, wind turbine generator set. The inner ring is precisely matched with the rolling body and the shaft, which directly determines the rotation accuracy, carrying capacity, service life and overall operation stability of the bearing, and is a key basic element to improve the performance and reliability of the host equipment. There are many processes in the processing of the inner ring, and rigid metal pipes are usually used as conveying channels to transfer the inner ring between each process, but the rigid structure can cause the outer circumferential surface of the inner ring workpiece to be easily damaged, scratched or indented.

[0043] Therefore, the present application provides an inner ring feeding device, which can solve the problem of surface damage of the inner ring caused by collision during transportation.

[0044] Embodiment one:

[0045] The embodiment provides an inner ring feeding device, please refer to Figure 1 and Figure 2 , comprising:

[0046] The first fixed pipe 121 and the second fixed pipe 31 are rigid materials (such as metal) for example, and can be used as the starting fixed end and the terminal fixed end of the whole conveying channel, the inner ring 50 enters from the first fixed pipe 121 and is output from the second fixed pipe 31, and the materials of the first fixed pipe 121 and the second fixed pipe 31 include rigid materials but are not limited thereto, and are specifically subject to actual application.

[0047] In the embodiment, the central axis of the first fixed pipe 121 is spaced apart from the central axis of the second fixed pipe 31 and can be relatively parallel, that is, there is a certain horizontal offset between the two, and the offset design enables the flexible assembly 20 to have a specific deformation.

[0048] In the embodiment, the flexible assembly 20 includes the first flexible section 21 and the second flexible section 22, the first fixed pipe 121, the first flexible section 21, the second flexible section 22 and the second fixed pipe 31 are sequentially connected and form a feeding channel, wherein the first flexible section 21 is semicircular. And the first flexible section 21 and the second flexible section 22 are connected with one end of the first fixed pipe 121 and the second fixed pipe 31 by welding, clamping or flange sealing, so as to form a feeding channel for the inner ring 50, and the overall feeding direction of the feeding channel is from top to bottom, and the conveying is realized by the gravity of the inner ring 50.

[0049] In the embodiment, please refer to Figure 3 , the feeding device includes a preparation state and a feeding state, the preparation state includes that the minimum included angle α of the arc surface normal of the first flexible section 21 and the feeding direction of the first fixed pipe 121 is less than or equal to a set value, wherein the minimum included angle α indicates that the bending can be kept in a smooth and moderate range, so that the inner ring 50 can make a curve motion along the arc of the first flexible section 21 after entering the feeding channel, compared with the related art, the impact force of the falling of the inner ring 50 can be effectively reduced when directly falling into the rigid conveying channel, the collision is reduced, and the probability of damage, jamming or excessive wear of the inner ring 50 in the conveying process is reduced.

[0050] In the embodiment, the feeding state of the feeding device includes that the arc surface of the first flexible section 21 is extruded by the inner ring 50 so that the minimum included angle α is reduced.

[0051] Specifically, when the inner ring 50 falls into the first flexible section 21, the self-weight and the falling speed of the inner ring 50 will impact and extrude the arc surface of the first flexible section 21, so that the elastic deformation occurs, and the minimum included angle a is reduced. The dynamic bending and deformation process can absorb the impact of the falling of the inner ring 50, and buffer the impact force generated by the inner ring 50, thereby greatly reducing the speed and force of the collision between the inner ring 50 and the passage wall, and fundamentally avoiding the generation of the knock damage.

[0052] Further, please refer to Figure 2 and Figure 3 The set value is greater than 0° and less than 60°.

[0053] Preferably, the set value is preferably greater than or equal to 30° and less than or equal to 45°, so that the bending of the first flexible section 21 is kept in a smooth and moderate state, and the set value is specifically subject to actual application.

[0054] Further, the first flexible section 21 and the second flexible section 22 are integrally formed and spirally arranged along the central axis of the first flexible section 21 and the second flexible section 22, wherein the central axis of the first flexible section 21 and the second flexible section 22 is a curve.

[0055] Specifically, the cross section of the first flexible section 21 and the second flexible section 22 is circular or rectangular, and the specific application is not limited in the embodiment. The first flexible section 21 and the second flexible section 22 can be made of materials with certain elasticity and wear resistance, such as polyurethane, ultra-high molecular weight polyethylene or a soft tube with a spring skeleton embedded inside, or can be made of metal materials spirally arranged along the central axis of the first flexible section 21 and the second flexible section 22, such as a spring. The specific application is subject to actual application, and the spiral structure further enhances the buffering and adaptive ability of the flexible assembly 20, and can better guide and adjust the falling posture of the inner ring 50.

[0056] Further, the minimum pitch of the first flexible section 21 is less than the minimum pitch of the second flexible section 22.

[0057] It can be understood that the first flexible section 21 and the second flexible section 22 can be semicircular, and the bending degree of the first flexible section 21 is greater than that of the second flexible section 22. The minimum pitch of the first flexible section 21 is less than that of the second flexible section 22 in both the preparation state and the supply state, so that the inner ring 50 can fall into the first flexible section 21 for the first time, the impact force of the falling is reduced to the maximum extent, and the probability of damage or wear of the inner ring 50 is further reduced due to the smaller bending degree of the second flexible section 22 and the avoidance of the second impact under the action of gravity.

[0058] Further, please refer toFigure 1 and Figure 2 The first fixing unit 12 comprises a first fixing pipe 121, a first guide leaf 122 and a guide plate 123, and the first fixing pipe 121 is internally provided with a plurality of first guide leaves 122 and guide plates 123.

[0059] The first fixing pipe 121 comprises a plurality of first fixing plates 1211, which enclose and form a first containing space 1212 penetrating along the feeding direction. Exemplarily, the first fixing plate 1211 can be four, forming a first fixing pipe 121 with a rectangular cross section, and the specific cross section is subject to actual application. The plurality of first guide leaves 122 and guide plates 123 are sequentially arranged in the first containing space 1212 along the feeding direction; wherein the first guide leaf 122 and the guide plate 123 are connected with a first fixing plate 1211 and extend to the central axis of the first fixing pipe 121 by a first preset distance; the guide plate 123 is inclined at a preset angle towards the side close to the first flexible section 21.

[0060] It can be understood that the plurality of first guide leaves 122 are arranged at intervals along the feeding direction, one end of which is fixedly connected with a first fixing plate 1211, and the other end extends to the central axis of the first fixing pipe 121 by a first preset distance, which does not affect the passing of the inner ring 50. Wherein the first preset distance is greater than or equal to the length of the first fixing pipe 121 minus the diameter of the inner ring 50, but does not affect the passing of the inner ring 50. Exemplarily, the length of the first fixing pipe 121 is 6 cm, the diameter of the inner ring 50 is 4 cm, and the first preset distance is in the range of 2 cm-2.5 cm, and the specific value is subject to actual application. Moreover, the end of the first guide leaf 122 extending to the central axis of the first fixing pipe 121 is naturally bent to form a guide port, which ensures that the first guide leaf 122 can play a buffering and guiding role for the falling of the inner ring 50.

[0061] Exemplarily, the first guide leaf 122 can be a rubber material with a buffering effect, and the shape of the first guide leaf 122 in contact with the inner ring 50 can be the shape of the inner ring 50, which can reduce the negative impact of the first guide leaf 122 on the inner ring 50 to a greater extent, and the specific value is subject to actual application, which is not limited in the present application.

[0062] In the present embodiment, the guide plate 123 is also fixed on a first fixing plate 1211 and inclined at a preset angle towards the side close to the first flexible section 21, which ensures that the inner ring 50 is smoothly guided into the flexible assembly 20, wherein the preset angle is greater than or equal to 30° and less than or equal to 50°, and the specific value is subject to actual application.

[0063] Further, the first fixing assembly 10 comprises a conical tube 11 in addition to the first fixing unit 12, which is used to guide the inner ring 50, and the conical tube 11 can be a trapezoidal open structure, one side of the conical tube 11 is fixedly connected to the side of the first fixing tube 121 away from the flexible assembly 20, and the inner ring 50 enters the first fixing tube 121 again through the conical tube 11.

[0064] Further, please refer to Figure 1 and Figure 2 , the second fixing assembly 30 comprises a second fixing tube 31 and a second guide leaf 32, and the second fixing tube 31 is provided with a plurality of second guide leaves 32.

[0065] Specifically, the second fixing tube 31 comprises a plurality of second fixing plates 311, which enclose and form a second containing space 312 penetrating in the feeding direction, and the plurality of second guide leaves 32 are arranged in the second containing space 312 in the feeding direction, and the second guide leaf 32 is connected with a second fixing plate 311 and extends to the central axis of the second fixing tube 31 by a second preset distance.

[0066] Specifically, the second preset distance of the second guide leaf 32 is greater than or equal to the length of the second fixing tube 31 minus the diameter of the inner ring 50, but does not affect the passing of the inner ring 50, which ensures that the second guide leaf 32 can play a buffering and guiding role for the falling of the inner ring 50, which will not be described here.

[0067] Further, please refer to Figure 4 and Figure 5 , the inner ring feeding device further comprises:

[0068] The inclined sliding assembly 40 comprises an inclined sliding channel 41 and an elastic pad 42 and a sensor 43 arranged in the inclined sliding channel 41, wherein the inclined sliding channel 41 is movably connected to the end of the second fixing tube 31 away from the flexible assembly 20, for example, through a hinge connection, so that the inclination angle of the inclined sliding channel 41 is adjustable relative to the second fixing tube 31, which improves the efficiency of the inner ring 50 transportation and avoids the accumulation of the inner ring 50 in the inclined sliding channel 41.

[0069] Specifically, the inclined sliding channel 41 is provided with a conveying groove 44 in a direction perpendicular to the feeding direction, and the elastic pad 42 and the sensor 43 are located in the conveying groove 44 and below the orthographic projection of the second flexible section 22.

[0070] Illustratively, the elastic pad 42 can be rubber or other elastic materials, and the inner ring 50 can directly fall into the elastic pad 42 when falling from the second fixing tube 31, further buffering and protecting the inner ring 50.

[0071] Specifically, the sensor 43 can be a photoelectric sensor 43 or a pressure sensor 43, which is triggered when the inner ring 50 falls onto the elastic pad 42 of the conveying groove 44 and stays for a preset time length, i.e., the sensor sends a signal to stop the continuous feeding of another inner ring 50, so as to ensure that the inner ring 50 will not be stacked in any position of the first fixed tube 121, the flexible assembly 20, the second fixed tube 31 and the inclined sliding assembly 40, and avoid the collision between the inner ring 50 and another inner ring 50. The preset time length can be 2-5s, and the specific preset time length is subject to the actual application, and the criterion is not to reduce the processing efficiency of the inner ring 50, which is not specifically limited in this embodiment.

[0072] Further, the inner ring supply device further comprises:

[0073] The conveying assembly 60 comprises a horizontal conveying unit 61, a vertical conveying unit 62 and a clamping unit 63. The horizontal conveying unit 61 is slidably connected with the vertical conveying unit 62, and can drive the vertical conveying unit 62 to move horizontally. The vertical conveying unit 62 is movably connected with the clamping unit 63, and can drive the clamping unit 63 to move vertically. The clamping unit 63 is used for clamping the inner ring 50 and sending the inner ring 50 into the tapered tube 11, and the inner ring 50 enters the first fixed tube 121 along the tapered tube 11.

[0074] Embodiment two:

[0075] Please refer to Figure 6 In this embodiment, an inner ring supply method based on the above-mentioned inner ring supply device is provided, which comprises the following steps S1-S4:

[0076] S1, based on the triggering of the supply instruction, the inner ring 50 is put into the first fixed tube 121;

[0077] S2, the inner ring 50 enters the first fixed tube 121 and falls into the first flexible section 21 under the action of gravity; wherein the inner ring 50 contacts and presses the arc surface of the first flexible section 21, and the smallest included angle a becomes smaller;

[0078] S3, the inner ring 50 sequentially passes through the second flexible section 22 and the second fixed tube 31 along the supply channel from the first flexible section 21.

[0079] Further, after the inner ring 50 sequentially passes through the second flexible section 22 and the second fixed tube 31 along the supply channel from the first flexible section 21, the method further comprises the following steps:

[0080] Please refer to Figure 7 S4, the inner ring 50 falls into the conveying groove 44 along the supply channel, and the sensor 43 identifies whether the inner ring 50 stays in the conveying groove 44 for a preset time length; if the inner ring 50 stays for a preset time length, the feeding of another inner ring 50 is stopped; wherein the sensor 43 is located in the conveying groove 44 and in the orthographic projection of the second flexible section 22.

[0081] Further, when the inner ring 50 falls and stays for a preset time length, the sensor 43 is triggered, the sensor 43 sends a signal to stop continuing to put another inner ring 50, so as to ensure that the inner ring 50 will not be stacked in any first fixed pipe 121, flexible assembly 20, second fixed pipe 31 and inclined sliding assembly 40, and to avoid the collision between the inner ring 50 and another inner ring 50, wherein the preset time length can be 2s-5s, and the specific preset time length is subject to actual application, and the criterion is not to reduce the processing efficiency of the inner ring 50; when the inner ring 50 falls for less than the preset time length, the sensor 43 is not triggered, and the carrying assembly 60 continues to put an inner ring 50 for transportation, and the specific application is subject to actual application.

[0082] Those skilled in the art can understand that the above-mentioned embodiments are specific cases for implementing the present disclosure, and in actual application, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. An inner ring supply device characterized by comprising: The inner ring feeding device comprises: A first fixed tube; A second fixed tube; A flexible assembly comprising a first flexible section and a second flexible section; the first flexible section and the second flexible section are integrally formed and helically arranged along the central axis of the first flexible section and the second flexible section for several turns, wherein the central axis of the first flexible section and the second flexible section is a curve; the first fixed tube, the first flexible section, the second flexible section, and the second fixed tube are sequentially connected to form a feeding channel; the first flexible section is arranged in a semicircular shape; The feeding direction of the feeding channel is from top to bottom; the central axis of the first fixed tube is spaced apart from the central axis of the second fixed tube; The preparation state of the feeding device includes that the minimum included angle α between the normal line of the arc surface of the first flexible section and the feeding direction of the first fixed tube is less than or equal to a set value; The feeding state of the feeding device includes that the arc surface of the first flexible section is extruded by the inner ring so that the minimum included angle α is reduced.

2. The inner ring feeding device according to claim 1, wherein The set value is greater than 0° and less than 60°.

3. The inner ring feeding device according to claim 1, wherein The minimum pitch of the first flexible section is less than the minimum pitch of the second flexible section.

4. The inner ring feeding device according to claim 1, wherein A plurality of first guide springs and a guide plate are arranged in the first fixed tube; The first fixed tube comprises a plurality of first fixed plates, the plurality of first fixed plates enclose and form a first containing space penetrating along the feeding direction, and the plurality of first guide springs and the guide plate are sequentially arranged in the first containing space along the feeding direction; wherein the first guide spring and the guide plate are connected with a first fixed plate and extend to the central axis of the first fixed tube by a first preset distance; the guide plate is inclined to the side close to the first flexible section by a preset angle.

5. The inner ring feeding device according to claim 1, wherein A plurality of second guide springs are arranged in the second fixed tube; The second fixed tube comprises a plurality of second fixed plates, the plurality of second fixed plates enclose and form a second containing space penetrating along the feeding direction, and the plurality of second guide springs are arranged in the second containing space along the feeding direction; the second guide spring is connected with a second fixed plate and extends to the central axis of the second fixed tube by a second preset distance.

6. The inner ring feeding device according to claim 1, wherein The inner ring feeding device further comprises: An inclined sliding assembly, the inclined sliding assembly comprises an inclined sliding channel, an elastic pad arranged in the inclined sliding channel, and a sensor, the inclined sliding channel is movably connected with the end of the second fixed tube away from the flexible assembly; the inclined sliding channel is provided with a conveying groove in a direction perpendicular to the feeding direction, and the elastic pad and the sensor are located in the conveying groove and below the orthographic projection of the second flexible section.

7. The inner ring feeding device according to claim 1, wherein The inner ring feeding device further comprises: The conveying assembly comprises a horizontal conveying unit, a vertical conveying unit and a clamping unit; the horizontal conveying unit is slidably connected with the vertical conveying unit, and the vertical conveying unit is movably connected with the clamping unit; the clamping unit is used for clamping the inner ring.

8. An inner ring supply method characterized by, The inner ring feeding method is applied to the inner ring feeding device in any one of claims 1-7, and the inner ring feeding method comprises: Based on the triggering of the feeding instruction, the inner ring is put into the first fixed tube; The inner ring enters the first fixed tube and falls into the first flexible section along the feeding channel under the action of gravity; wherein the inner ring contacts and extrudes the arc surface of the first flexible section, and the minimum included angle α decreases; The inner ring sequentially passes through the second flexible section and the second fixed tube from the first flexible section along the feeding channel.

9. The inner ring feeding method according to claim 8, wherein After the inner ring sequentially passes through the second flexible section and the second fixed tube from the first flexible section along the feeding channel, the inner ring feeding method further comprises: The inner ring falls into the conveying groove along the feeding channel, and a sensor identifies whether the inner ring stays in the conveying groove for a preset time length; if the inner ring is identified to stay for the preset time length, another inner ring is stopped from being continuously introduced; wherein the sensor is located in the conveying groove and under the orthographic projection of the second flexible section.

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