Accumulating and conveying system for pen type injector and working method of accumulating and conveying system

Abstract

The invention belongs to the technical field of conveying, and particularly relates to a power and free conveying system for pen type syringes and a working method thereof.The power and free conveying system for the pen type syringes comprises a barrel rotationally arranged on a center shaft and internally provided with an elastic damping part; the chain wheel and the barrel are coaxially arranged, and the output end of the chain wheel extends into the barrel to abut against the elastic damping piece so as to drive the barrel to rotate along with the barrel; the opposite faces of the elastic damping piece and the output end are provided with an arc-shaped groove and an arc-shaped protrusion respectively. When the weight borne by the barrel body exceeds a threshold value, the barrel body is static to enable the output end of the chain wheel to slip, namely, the arc-shaped protrusion at the output end pushes the elastic damping piece to retreat, and the end of the arc-shaped protrusion makes contact with the surface of the elastic damping piece so that friction loss of the elastic damping piece can be reduced; according to the power and free conveying system for the pen type injector, the abrasion consumption caused by point-surface contact is better, and the elastic damping piece can be used for a longer time.

Description

Technical Field

[0001] The present invention belongs to the technical field of conveying devices, and specifically relates to the configuration of a single roller and a supporting member used therefor, and more particularly to an accumulation and conveying system for a pen-type injector and a working method thereof. Background Art

[0002] The accumulation roller is a device used in the material conveying system, which has the dual functions of conveying and temporarily storing items.

[0003] In the production process of pen-type syringes, an accumulation and conveying method is usually adopted to transfer and convey the transfer box containing the pen-type syringes. However, in the related art, the accumulation roller achieves temporary storage of items by causing slippage between the sprocket and the friction plate of the cylinder; however, when the sprocket slips, it always contacts and rubs against the friction plate, which causes the friction plate and the self-lubricating bearing that cooperates with it to always be in a high temperature state, which leads to increased wear of the friction plate and damage to the self-lubricating bearing.

[0004] Therefore, how to solve the technical problem that the friction plate wear is easily increased when the sprocket slips is urgently needed to be solved by technical personnel in this field.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0006] The embodiments of the present disclosure at least provide an accumulation and delivery system for a pen-type injector and a working method thereof.

[0007] In a first aspect, an embodiment of the present disclosure provides an accumulation and conveying system for a pen-type syringe, comprising: a plurality of accumulation rollers arranged along a material conveying direction, and conveying materials by rotating the accumulation rollers, wherein the accumulation rollers comprise: a cylinder body, rotatably arranged on a central axis, and having an elastic damping member disposed inside; a sprocket, coaxially arranged with the cylinder body, and having an output end extending into the cylinder body and abutting against the elastic damping member to drive the cylinder body to rotate; wherein arc-shaped grooves and arc-shaped protrusions are respectively disposed on opposite surfaces of the elastic damping member and the output end; when the weight borne by the cylinder body exceeds a threshold value, the cylinder body stops to make the output end of the sprocket slip, that is, the arc-shaped protrusion at the output end pushes the elastic damping member backward, and the end of the arc-shaped protrusion contacts the surface of the elastic damping member to reduce the friction loss of the elastic damping member.

[0008] In an optional embodiment, the elastic damping member includes: a spring and a friction ring plate; the friction ring plate is provided with the arc-shaped groove, and the spring pushes the friction ring plate to abut against the output end of the sprocket to achieve power transmission; when the weight borne by the cylinder exceeds a threshold, the arc-shaped protrusion pushes the friction ring plate backward, and contacts the surface of the friction ring plate through the end of the arc-shaped protrusion to reduce the friction loss of the friction ring plate.

[0009] In an optional embodiment, a mounting sleeve is provided in the cylinder, the mounting sleeve is connected to the cylinder, and is rotatably arranged on the central axis through a first bearing; wherein the elastic damping member is arranged in the mounting sleeve, and the output end of the sprocket extends into the mounting sleeve and abuts against the elastic damping member; when the output end slips, the arc-shaped protrusion of the output end pushes the friction ring of the elastic damping member to move back and forth in the mounting sleeve, and the temperature is reduced by blowing air into the gap between the first bearing and the central axis.

[0010] In an optional implementation, the length of the arc-shaped protrusion is smaller than the width of the friction ring plate, so as to reduce the friction area of ​​the friction ring plate when the output end slips.

[0011] In an optional embodiment, the arc surface of the arc-shaped protrusion is arranged along the rotation direction, and the shape of the arc-shaped protrusion is smaller than the shape of the arc-shaped groove, so that when the sprocket drives the cylinder to rotate, the friction ring plate fits with the end face of the output end.

[0012] In an optional embodiment, at least two arc-shaped grooves are provided on the friction ring plate, and the number of the arc-shaped protrusions matches the number of the arc-shaped grooves; wherein the arc-shaped grooves are evenly distributed on the friction ring plate, so that the friction ring plate remains stable when it retreats under force.

[0013] In an optional embodiment, an annular boss is provided on the inner wall of the mounting sleeve; the spring is sleeved on the central axis, with one end abutting against the annular boss and the other end abutting against the friction ring plate.

[0014] In an optional embodiment, the sprocket is sleeved on the central shaft and is rotatably connected to the central shaft via a second bearing set.

[0015] On the second aspect, the disclosed embodiment also provides a working method of an accumulation and delivery system for a pen-type syringe, which includes: rotatably setting the cylinder on the central axis, and arranging an elastic damping member inside; arranging the sprocket coaxially with the cylinder, and the output end extends into the cylinder and abuts against the elastic damping member to drive the cylinder to rotate; arc-shaped grooves and arc-shaped protrusions are respectively arranged on the opposite surfaces of the elastic damping member and the output end; when the weight borne by the cylinder exceeds a threshold, it stops, so that the output end of the sprocket slips, that is, the arc-shaped protrusion at the output end pushes the elastic damping member backward, and the end of the arc-shaped protrusion contacts the surface of the elastic damping member to reduce the friction loss of the elastic damping member.

[0016] In an optional embodiment, a mounting sleeve is provided in the cylinder, the mounting sleeve is connected to the cylinder, and is rotatably arranged on the central axis through a first bearing; wherein the elastic damping member is arranged in the mounting sleeve, and the output end of the sprocket extends into the mounting sleeve and abuts against the elastic damping member; when the output end slips, the arc-shaped protrusion of the output end pushes the friction ring of the elastic damping member to move back and forth in the mounting sleeve, and the temperature is reduced by blowing air into the gap between the first bearing and the central axis.

[0017] The beneficial effect of the present invention is that when the weight borne by the cylinder of the accumulation and delivery system and working method of the pen-type syringe exceeds a threshold value, the output end of the sprocket slips, so that the cylinder no longer rotates, thereby interrupting the delivery of the object; specifically, when the output end of the sprocket slips, it rotates relative to the elastic damping member, and at this time the arc-shaped protrusion on the output end rotates out of the arc-shaped groove and moves against the surface of the elastic damping member. At this time, only the end of the arc-shaped protrusion is in contact with the surface of the elastic damping member, that is, point-to-surface contact. Compared with the surface-to-surface contact friction in the prior art, the wear and tear caused by the point-to-surface contact in the present system is better, so that the elastic damping member can be used for a longer period of time.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A perspective view of an accumulation and delivery system for a pen-type injector provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of the structure of an accumulation roller provided in an embodiment of the present disclosure; Figure 3 A schematic diagram of the structure of a friction ring provided by an embodiment of the present disclosure; Figure 4 A schematic diagram of an exploded structure of a mounting sleeve, an elastic damping member, and a sprocket provided in an embodiment of the present disclosure.

[0022] In the figure: Accumulation roller A; Cylinder 1, elastic damping member 11, arc groove 111, spring 112, friction ring plate 113, mounting sleeve 12, annular boss 121, first bearing 13; Sprocket 2, output end 21, arc-shaped protrusion 211, second bearing set 22; Central axis 3. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, in the drawings, the thickness of the components may be exaggerated or reduced in order to effectively describe the technical content.

[0025] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0026] like Figure 1 , Figure 2As shown, at least one embodiment provides an accumulation and conveying system for a pen-type injector, comprising: a plurality of accumulation rollers A arranged along a material conveying direction, and conveying materials by rotating the accumulation rollers A, wherein the accumulation rollers A comprise: a cylinder 1, rotatably arranged on a central axis 3, and provided with an elastic damping member 11 inside; a sprocket 2, coaxially arranged with the cylinder 1, and an output end 21 extending into the cylinder 1 and abutting against the elastic damping member 11, so as to drive the cylinder 1 to rotate; wherein arc-shaped grooves 111 and arc-shaped protrusions 211 are respectively provided on opposite surfaces of the elastic damping member 11 and the output end 21; when the weight borne by the cylinder 1 exceeds a threshold value, the cylinder 1 stops to make the output end 21 of the sprocket 2 slip, that is, the arc-shaped protrusion 211 of the output end 21 pushes the elastic damping member 11 backward, and the end of the arc-shaped protrusion 211 contacts the surface of the elastic damping member 11 to reduce the friction loss of the elastic damping member 11.

[0027] In this embodiment, when the weight borne by the cylinder 1 exceeds a threshold value, the output end 21 of the sprocket 2 slips, causing the cylinder 1 to stop rotating, thereby interrupting the transportation of the object; specifically, when the output end 21 of the sprocket 2 slips, it rotates relative to the elastic damping member 11, and at this time, the arc-shaped protrusion 211 on the output end 21 rotates out of the arc-shaped groove 111 and moves against the surface of the elastic damping member 11. At this time, only the end of the arc-shaped protrusion 211 is in contact with the surface of the elastic damping member 11, that is, point-to-surface contact. Compared with the surface-to-surface contact friction in the prior art, the wear and tear caused by the point-to-surface contact in this system is better, so that the elastic damping member 11 can be used for a longer time.

[0028] like Figure 2 As shown, in some embodiments, the elastic damping member 11 includes: a spring 112 and a friction ring plate 113; an arc-shaped groove 111 is provided on the friction ring plate 113, and the spring 112 pushes the friction ring plate 113 to abut against the output end 21 of the sprocket 2 to achieve power transmission; when the weight borne by the cylinder 1 exceeds a threshold, the arc-shaped protrusion 211 pushes the friction ring plate 113 backward, and contacts the surface of the friction ring plate 113 through the end of the arc-shaped protrusion 211 to reduce the friction loss of the friction ring plate 113.

[0029] In this embodiment, in order to produce point-to-surface contact between the output end 21 and the elastic damping member 11 when slipping, the system presses the friction ring plate 113 in the elastic damping member 11 against the output end 21 through the spring 112. When slipping, the arc-shaped protrusion 211 can push the friction ring plate 113 backward to rotate out of the arc-shaped groove 111.

[0030] like Figure 2As shown, in some embodiments, a mounting sleeve 12 is provided in the cylinder 1, the mounting sleeve 12 is connected to the cylinder 1, and is rotatably arranged on the central shaft 3 through a first bearing 13; wherein the elastic damping member 11 is arranged in the mounting sleeve 12, and the output end 21 of the sprocket 2 extends into the mounting sleeve 12 and abuts against the elastic damping member 11; when the output end 21 slips, the arc-shaped protrusion 211 of the output end 21 pushes the friction ring plate 113 of the elastic damping member 11 to move back and forth in the mounting sleeve 12, and air is blown into the gap between the first bearing 13 and the central shaft 3 to reduce the temperature.

[0031] In the present embodiment, the mounting sleeve 12 is rotatably arranged on the central shaft 3 through the first bearing 13. Since such equipment usually adopts a self-lubricating bearing, that is, the first bearing 13 is a self-lubricating bearing, and since the temperature resistance of the self-lubricating bearing is limited, in order to reduce the temperature of the self-lubricating bearing, an air flow is generated by the reciprocating friction ring plate 113 to blow air to the self-lubricating bearing, thereby achieving cooling of the self-lubricating bearing. Moreover, when the friction ring plate 113 moves, it is already in a material accumulation state, and the vibration of the accumulation roller caused by the movement of the friction ring plate is avoided, resulting in the bumpy transportation of the material and causing damage to the pen-type injector.

[0032] At the same time, the reciprocating friction ring 113 generates airflow to blow air into the gap between the self-lubricating bearing and the central shaft 3, thereby blowing away the debris in the gap to prevent the debris from causing an increase in starting resistance when the cylinder 1 rotates again.

[0033] like Figure 3 As shown, in some embodiments, the length of the arc-shaped protrusion 211 is smaller than the width of the friction ring plate 113 , so as to reduce the friction area of ​​the friction ring plate 113 when the output end 21 slips.

[0034] In this embodiment, the length of the arc-shaped protrusion 211 is slightly smaller than the length H of the arc-shaped groove 111 , and the length H of the arc-shaped groove 111 is much smaller than the width L of the friction ring plate 113 , thereby reducing the wear surface on the friction ring plate 113 as much as possible.

[0035] like Figure 3 , Figure 4 As shown, in some embodiments, the arc surface of the arc-shaped protrusion 211 is arranged along the rotation direction, and the shape of the arc-shaped protrusion 211 is smaller than the shape of the arc-shaped groove 111, so that when the sprocket 2 drives the cylinder 1 to rotate, the friction ring plate 113 fits with the end surface of the output end 21.

[0036] In this embodiment, the friction ring plate 113 can only move axially and cannot rotate; the arc-shaped protrusion 211 is smaller than the arc-shaped groove 111, and when the output end 21 does not slip, the end surface of the output end 21 fits with the surface of the friction ring plate 113.

[0037] In some embodiments, at least two arcuate grooves 111 are formed on the friction ring plate 113, and the number of arcuate protrusions 211 matches the number of arcuate grooves 111; wherein the arcuate grooves 111 are evenly distributed on the friction ring plate 113, so that the friction ring plate 113 remains stable when retreating under force.

[0038] like Figure 2 As shown, in some embodiments, an annular boss 121 is provided on the inner wall of the mounting sleeve 12 ; the spring 112 is sleeved on the central shaft 3 , with one end abutting against the annular boss 121 and the other end abutting against the friction ring plate 113 .

[0039] In some embodiments, the sprocket 2 is sleeved on the central shaft 3 and is rotatably connected to the central shaft 3 via a second bearing set 22 .

[0040] At least one embodiment also provides a working method for an accumulation and delivery system for a pen-type injector, comprising: rotatably setting the barrel 1 on the central axis 3, and arranging an elastic damping member 11 inside; arranging the sprocket 2 coaxially with the barrel 1, and the output end 21 extends into the barrel 1 and abuts against the elastic damping member 11 to drive the barrel 1 to rotate; arc-shaped grooves 111 and arc-shaped protrusions 211 are respectively arranged on the opposite surfaces of the elastic damping member 11 and the output end 21; when the weight borne by the barrel 1 exceeds a threshold value, it stops so that the output end 21 of the sprocket 2 slips, that is, the arc-shaped protrusion 211 of the output end 21 pushes the elastic damping member 11 backward, and the end of the arc-shaped protrusion 211 contacts the surface of the elastic damping member 11 to reduce the friction loss of the elastic damping member 11.

[0041] In some embodiments, a mounting sleeve 12 is provided in the cylinder 1, the mounting sleeve 12 is connected to the cylinder 1, and is rotatably arranged on the central axis 3 through a first bearing 13; wherein the elastic damping member 11 is arranged in the mounting sleeve 12, and the output end 21 of the sprocket 2 extends into the mounting sleeve 12 and abuts against the elastic damping member 11; when the output end 21 slips, the arc-shaped protrusion 211 of the output end 21 pushes the friction ring plate 113 of the elastic damping member 11 to move back and forth in the mounting sleeve 12, and air is blown into the gap between the first bearing 13 and the central axis 3 to cool it down.

[0042] Regarding the specific structure and implementation process of the accumulation and delivery system for the pen-type injector, please refer to the relevant discussion in the above embodiments, which will not be repeated here.

[0043] In summary, in the accumulation and delivery system and working method for pen-type syringes, when the weight borne by the cylinder 1 exceeds a threshold value, the output end 21 of the sprocket 2 slips, causing the cylinder 1 to stop rotating, thereby interrupting the delivery of the object; specifically, when the output end 21 of the sprocket 2 slips, it rotates relative to the elastic damping member 11, and at this time, the arc-shaped protrusion 211 on the output end 21 rotates out of the arc-shaped groove 111 and moves against the surface of the elastic damping member 11. At this time, only the end of the arc-shaped protrusion 211 is in contact with the surface of the elastic damping member 11, that is, point-to-surface contact. Compared with the surface-to-surface contact friction in the prior art, the wear and tear caused by the point-to-surface contact in this system is better, so that the elastic damping member 11 can be used for a longer time.

[0044] Herein, when it is mentioned that a first component is located on a second component, this may mean that the first component may be directly formed on the second component, or a third component may be interposed between the first component and the second component.

[0045] In this article, when an element or layer is referred to as being "located on," "engaged to," "connected to," "attached to," or "coupled to" another element or layer, it may be directly located on, engaged, connected, attached to, or coupled to another element or layer, or there may be intermediate elements or layers. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intermediate elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0046] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0047] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0048] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0049] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0051] Spatially relative terms, such as "inside", "outside", "below", "below", "down", "above", "on", etc., may be used herein to facilitate description of the relationship of one element or feature to another element or feature as illustrated in the figure. In addition to the orientation depicted in the figure, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is turned over, the elements described as "below" or "below" other elements or features will be oriented to be "above" other elements or features. Therefore, the example term "below" can cover the orientation above and below. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0052] In the above discussion, unless otherwise stated, the terms "about," "approximately," "substantially," etc., when used to describe a numerical value, mean a variation of + / - 10% of the value.

[0053] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An accumulation delivery system for a pen-type injector, comprising: A plurality of accumulating rollers (A) are arranged along the material conveying direction, and the materials are conveyed by the rotation of the accumulating rollers (A), characterized in that: The accumulation roller (A) comprises: A cylinder (1) is rotatably mounted on a central axis (3) and has an elastic damping member (11) disposed therein; The sprocket (2) is coaxially arranged with the cylinder (1), and the output end (21) extends into the cylinder (1) to abut against the elastic damping member (11) to drive the cylinder (1) to rotate; wherein An arc-shaped groove (111) and an arc-shaped protrusion (211) are respectively provided on the surfaces opposite to the output end (21); When the weight borne by the cylinder (1) exceeds a threshold value, the cylinder (1) stops to allow the output end (21) of the sprocket (2) to slip, i.e., the arc-shaped protrusion (211) of the output end (21) pushes the elastic damping member (11) backward, and the end of the arc-shaped protrusion (211) contacts the surface of the elastic damping member (11) to reduce the friction loss of the elastic damping member (11).

2. The accumulation and delivery system for a pen-type injector according to claim 1, characterized in that: The elastic damping member (11) comprises: a spring (112) and a friction ring plate (113); The friction ring plate (113) is provided with the arc-shaped groove (111), and the spring (112) pushes the friction ring plate (113) to abut against the output end (21) of the sprocket (2) to achieve power transmission; When the weight borne by the cylinder (1) exceeds a threshold value, the arc-shaped protrusion (211) pushes the friction ring plate (113) backward, and the end of the arc-shaped protrusion (211) contacts the surface of the friction ring plate (113) to reduce the friction loss of the friction ring plate (113).

3. The accumulation and delivery system for a pen-type injector according to claim 2, characterized in that: A mounting sleeve (12) is disposed in the cylinder (1), the mounting sleeve (12) being connected to the cylinder (1) and rotatably disposed on the central shaft (3) via a first bearing (13); wherein The elastic damping member (11) is arranged in the mounting sleeve (12), and the output end (21) of the sprocket (2) extends into the mounting sleeve (12) to abut against the elastic damping member (11); When the output end (21) slips, the arc-shaped protrusion (211) of the output end (21) pushes the friction ring plate (113) of the elastic damping member (11) to move back and forth in the mounting sleeve (12), thereby cooling the gap between the first bearing (13) and the central shaft (3) by blowing air.

4. The accumulation and delivery system for a pen-type injector according to claim 3, characterized in that: The length of the arc-shaped protrusion (211) is smaller than the width of the friction ring plate (113), so as to reduce the friction area of ​​the friction ring plate (113) when the output end (21) slips.

5. The accumulation and delivery system for a pen-type injector according to claim 4, characterized in that: The arc surface of the arc-shaped protrusion (211) is arranged along the rotation direction, and the shape of the arc-shaped protrusion (211) is smaller than the shape of the arc-shaped groove (111), so that when the sprocket (2) drives the cylinder (1) to rotate, the friction ring plate (113) fits with the end surface of the output end (21).

6. The accumulation and delivery system for a pen-type injector according to claim 5, characterized in that: The friction ring plate (113) is provided with at least two arc-shaped grooves (111), and the number of the arc-shaped protrusions (211) matches the number of the arc-shaped grooves (111); wherein The arc-shaped grooves (111) are evenly distributed on the friction ring plate (113), so that the friction ring plate (113) remains stable when retreating under force.

7. The accumulation and delivery system for a pen-type injector according to claim 6, characterized in that: The inner wall of the mounting sleeve (12) is provided with an annular boss (121); The spring (112) is sleeved on the central shaft (3), with one end abutting against the annular boss (121) and the other end abutting against the friction ring plate (113).

8. The accumulation delivery system for a pen-type injector according to claim 7, characterized in that: The sprocket (2) is sleeved on the central shaft (3) and is rotationally connected to the central shaft (3) via a second bearing group (22).

9. A method for operating the accumulation and delivery system for a pen-type injector as claimed in claim 1, characterized in that: include: The cylinder (1) is rotatably arranged on the central axis (3), and an elastic damping member (11) is arranged inside; The sprocket (2) and the cylinder (1) are coaxially arranged, and the output end (21) extends into the cylinder (1) to abut against the elastic damping member (11) to drive the cylinder (1) to rotate; An arc-shaped groove (111) and an arc-shaped protrusion (211) are respectively provided on the opposite surfaces of the elastic damping member (11) and the output end (21); When the weight borne by the cylinder (1) exceeds a threshold value, the cylinder (1) stops moving, so that the output end (21) of the sprocket (2) slips, that is, the arc-shaped protrusion (211) of the output end (21) pushes the elastic damping member (11) backward, and the end of the arc-shaped protrusion (211) contacts the surface of the elastic damping member (11) to reduce the friction loss of the elastic damping member (11).

10. The working method of the accumulation and delivery system for a pen-type injector according to claim 9, characterized in that: A mounting sleeve (12) is disposed in the cylinder (1), the mounting sleeve (12) being connected to the cylinder (1) and rotatably disposed on the central shaft (3) via a first bearing (13); wherein The elastic damping member (11) is arranged in the mounting sleeve (12), and the output end (21) of the sprocket (2) extends into the mounting sleeve (12) to abut against the elastic damping member (11); When the output end (21) slips, the arc-shaped protrusion (211) of the output end (21) pushes the friction ring plate (113) of the elastic damping member (11) to move back and forth in the mounting sleeve (12), thereby cooling the gap between the first bearing (13) and the central shaft (3) by blowing air.

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