Variable-pitch synchronous needling mechanism

Abstract

A variable-pitch synchronous needling mechanism comprises a rack, the rack is connected with a rotating table, the rack is provided with a variable-pitch adjusting assembly above the rotating table through a supporting arm, the variable-pitch adjusting assembly is connected with a telescopic needling plate through a guide rod, and the telescopic needling plate is provided with a plurality of needle holes. A driving assembly used for controlling the needling plate to move is arranged in the variable-pitch adjusting assembly, and the variable-pitch adjusting assembly is connected with the rotating table through a transmission system. According to the variable-pitch synchronous needling mechanism provided by the utility model, the needling pitch can be flexibly adjusted, the requirements of different products on the needle pitch are met, the processing requirements of different carbon-carbon preforms can be met, and the diversity and the quality of the products are improved. In addition, the uniformity of the needling effect can be effectively guaranteed through synchronous needling and needle pitch actions, so that the damage and defects of the carbon-carbon preform are greatly reduced. The production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon-carbon composite knitting technology, and particularly relates to a variable pitch synchronous needle punching mechanism. Background Art

[0002] Carbon-carbon composite material is a carbon matrix composite material reinforced by carbon fiber and its fabric. With the rapid development of the carbon-carbon composite material industry, in the production of carbon-carbon preforms, the method of machine knitting is increasingly widely used. Therefore, the requirements for the needle punching process are also getting higher and higher. The traditional needle punching mechanism has certain limitations in the adjustment of the needle punching pitch and synchronism. It is often unable to quickly and accurately change the needle punching pitch according to different production requirements, and it is difficult to ensure the synchronism of the needle punching action during the pitch change, which easily leads to uneven needle punching effect, thus affecting the product quality and production efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a variable pitch synchronous needle punching mechanism to reduce or avoid the problems mentioned above.

[0004] To solve the above technical problem, the utility model provides a variable pitch synchronous needle punching mechanism, which includes a bench. The bench is connected with a rotating table. The bench is provided with a variable pitch adjusting component above the rotating table through a support arm. The variable pitch adjusting component is connected with a telescopic needle punching plate through a guide rod. A driving component for controlling the movement of the needle punching plate is arranged in the variable pitch adjusting component. The variable pitch adjusting component is connected with the rotating table through a transmission system.

[0005] Preferably, the variable pitch adjusting component includes a housing fixedly connected with the support arm. A first rotating shaft is arranged in the housing. One end of the first rotating shaft is provided with a ratchet wheel, and the other end is provided with a first transmission wheel. A pair of slidably connected guide rods are arranged on each side of the housing on both sides of the ratchet wheel. A tension spring is fixedly connected to a pair of guide rods on one side, and a ratchet pawl is rotatably connected to a pair of guide rods on the other side. The housing is also provided with a needle pitch adjusting cover plate for covering the ratchet teeth of the ratchet wheel.

[0006] Preferably, the needle pitch adjusting cover plate includes a connecting part with an arc-shaped groove for connecting with the housing and an arc-shaped covering part for covering the ratchet teeth of the ratchet wheel.

[0007] Preferably, the needle pitch adjusting cover plate includes a connecting part with an arc-shaped groove for connecting with the housing, a complete circular panel, and a continuous or discontinuous arc-shaped covering part.

[0008] Preferably, the driving component is a telescopic cylinder or a telescopic motor.

[0009] Preferably, the bench is provided with guide rails, the rotating table can move horizontally on the guide rails, the rotating table is provided with driving wheels, the bench is provided with a first transmission shaft parallel to the guide rails, a sliding transmission wheel is arranged on the first transmission shaft, and the sliding transmission wheel is connected to the driving wheels through a belt / chain.

[0010] Preferably, the sliding transmission wheel is sized to be the same as the driving wheels.

[0011] Preferably, the transmission system is a belt / chain transmission system, which includes a driven wheel, a first guide wheel, a second guide wheel and a second transmission wheel connected by a belt / chain and arranged in the same vertical plane as the first transmission wheel. The second transmission wheel is arranged at the end of the first transmission shaft. The first guide wheel and the second guide wheel are arranged on the support arms of the bench and are respectively located above and below the second transmission wheel in the vertical direction, mainly for smoothly turning and tensioning the belt / chain towards the second transmission wheel. The driven wheel is arranged at the lower part of the support arm for the return journey of the belt / chain towards the first transmission wheel.

[0012] Preferably, the second transmission wheel is sized to be the same as the first transmission wheel.

[0013] Preferably, the belt / chain is a synchronous belt.

[0014] The variable pitch synchronous needling mechanism provided by the present utility model can flexibly adjust the needling pitch, meet the requirements of different products for the needle pitch, be able to adapt to the processing requirements of different carbon-carbon preforms, and improve the diversity and quality of products. In addition, through the synchronous needling and the action of the needle pitch, the uniformity of the needling effect can be effectively guaranteed, thereby greatly reducing the damage and defects of the carbon-carbon preforms. It is thus possible to improve production efficiency and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following drawings are only intended to illustrate and explain the present utility model schematically and do not limit the scope of the present utility model. Among them,

[0016] Figure 1 is a schematic structural principle diagram of a variable pitch synchronous needling mechanism according to a specific embodiment of the present utility model;

[0017] Figure 2 is Figure 1 a schematic structural principle diagram of the variable pitch synchronous needling mechanism from another angle;

[0018] Figure 3 is Figure 2 a three-dimensional structural principle diagram of the driving assembly of

[0019] Figure 4 Schematic diagram of the three-dimensional structure principle of the needle punching plate of Figure 1 ;

[0020] Figure 5 Schematic diagram of the partial three-dimensional structure principle of the variable pitch adjustment component in Figure 1 ;

[0021] Figure 6 Schematic diagram of the three-dimensional structure principle of the stitch pitch adjustment cover plate of Figure 5 ;

[0022] Figure 7 Schematic diagram of the three-dimensional structure principle of the stitch pitch adjustment cover plate of an improved embodiment based on Figure 6 ; Detailed implementation manners

[0023] For a clearer understanding of the technical features, objectives and effects of the present utility model, the detailed implementation manners of the present utility model will now be described with reference to the accompanying drawings. Among them, the same components are denoted by the same reference numerals.

[0024] Figure 1 Schematic diagram of the structural principle of a variable pitch synchronous needle punching mechanism according to a specific embodiment of the present utility model; Figure 2 Schematic diagram of the structural principle of the variable pitch synchronous needle punching mechanism of Figure 1 from another angle; Figure 3 Schematic diagram of the three-dimensional structure principle of the driving component of Figure 2 ; Figure 4 Schematic diagram of the three-dimensional structure principle of the needle punching plate of Figure 1 ; Figure 5 Schematic diagram of the partial three-dimensional structure principle of the variable pitch adjustment component in Figure 1 . Refer to Figures 1 to 5 As shown in

[0025] Figure 6 Schematic diagram of the three-dimensional structure principle of the stitch pitch adjustment cover plate of Figure 5 ; Refer to Figure 1 , Figure 5 and Figure 6As shown, the pitch adjustment assembly 3 includes a housing 31 fixedly connected to the support arm 11. A first rotating shaft 32 is disposed inside the housing 31. One end of the first rotating shaft 32 is provided with a ratchet wheel 33, and the other end is provided with a first transmission wheel 34. On each side of the ratchet wheel 33 in the housing 31, a pair of slidably connected guide rods 4 are provided. In this embodiment, when facing the ratchet wheel 33, a tension spring 35 is fixedly connected to the left pair of the guide rods 4, and a ratchet pawl 36 is rotatably connected to the right pair of the guide rods 4; the tension spring 35 is connected to the ratchet pawl 36. The housing 31 is further provided with a stitch pitch adjustment cover plate 37 for covering the teeth of the ratchet wheel 33. When the guide rod 4 moves upward, the tension spring 35 and the ratchet pawl 36 also move upward. At the same time, the tip of the tooth of the ratchet pawl 36 moves inward under the action of the tension spring 35 and forms a connection with the teeth of the ratchet wheel 33 not covered by the stitch pitch adjustment cover plate 37, thereby pushing the ratchet wheel 33 to rotate counterclockwise, and driving the first transmission wheel 34 to rotate. When the guide rod 4 moves downward, the tension spring 35 and the ratchet pawl 36 also move downward. The tip of the tooth of the ratchet pawl 36 forms a return slide with the teeth of the ratchet wheel 33 and disengages from contact, and instead comes into contact with the stitch pitch adjustment cover plate 37.

[0026] Figure 7 For Figure 6 a schematic diagram of the three-dimensional structural principle of the stitch pitch adjustment cover plate of an improved embodiment based on the above, as described above, in Figure 6 the embodiment shown, the purpose of the stitch pitch adjustment cover plate 37 is to cover the teeth of the ratchet wheel 33, Figure 6 the stitch pitch adjustment cover plate 37 includes a connecting portion 371 with an arc-shaped groove for connecting with the housing 31 and an arc-shaped covering portion 372 for covering the teeth of the ratchet wheel 33. Considering that an overly long arc-shaped structure may result in insufficient structural strength, in Figure 7 the embodiment shown, the stitch pitch adjustment cover plate 37' ensures strength by providing a complete circular panel 373 (covering the ratchet wheel 33). In this way, the arc-shaped covering portion 372' for covering the teeth of the ratchet wheel 33 does not need to start from the connecting portion 371, but only needs to ensure the range of the teeth of the ratchet wheel 33 to be covered. Of course, for the connecting portion 371, in order to ensure the connection strength with the circular panel 373, a part of the arc-shaped covering portion 372' can also be retained. That is to say, in Figure 7 the embodiment shown, the arc-shaped covering portion 372' can be two discontinuous parts on the arc. One part is used to ensure the range of the teeth of the ratchet wheel 33 to be covered, and the other part is used to enhance the connection strength between the connecting portion 371 and the circular panel 373. Of course, the arc-shaped covering portion 372' can also be asFigure 6 The continuous arc structure shown in the embodiment can take into account the above two needs.

[0027] See Figures 1 to 4 As shown, the driving component 6 can be a telescopic cylinder or a telescopic motor. As long as the driving component 6 is connected to the needle punching plate 5, it can control the reciprocating movement of the needle punching plate 5 in the vertical direction, so that the needle punching action can be realized. The driving component 6 is mainly used to provide driving power for the needle punching plate 5, and the guide rod 4 is used to ensure the stability of the running action / attitude of the needle punching plate 5.

[0028] See Figure 1 and Figure 2 As shown, the bench 1 can be provided with a guide rail 12. The rotating table 2 can be a commercially available mechanical rotating table. The rotating table 2 can move horizontally on the guide rail 12, so as to facilitate adjusting the position of the rotating table 2 according to the structure of the carbon-carbon preform. The rotating table 2 is provided with a driving wheel 21. The bench 1 is provided with a first transmission shaft 13 parallel to the guide rail 12. A sliding transmission wheel 14 is arranged on the first transmission shaft 13. The sliding transmission wheel 14 is connected to the driving wheel 21 through a belt / chain (preferably a commercially available synchronous belt). The size of the sliding transmission wheel 14 can be set to be the same as that of the driving wheel 21, so as to ensure a one-to-one transmission ratio, which is beneficial for calculation.

[0029] The transmission system 7 is a belt / chain (preferably a commercially available synchronous belt) transmission system, including a driven wheel 71, a first guide wheel 72, a second guide wheel 73 and a second transmission wheel 74 connected by a belt / chain and arranged in the same vertical plane as the first transmission wheel 34. The second transmission wheel 74 is arranged at the end of the first transmission shaft 13. The first guide wheel 72 and the second guide wheel 73 are arranged on the support arm 11 of the bench 1 and are respectively located above and below the second transmission wheel 74 in the vertical direction, mainly used for smoothly turning and tensioning the belt / chain towards the second transmission wheel 74. The driven wheel 71 is arranged at the lower part of the support arm 11 and is used for the return journey of the belt / chain towards the first transmission wheel 34. The size of the second transmission wheel 74 can be set to be the same as that of the first transmission wheel 34, so as to ensure a one-to-one transmission ratio, which is beneficial for calculation.

[0030] When the carbon-carbon preform is placed on the rotating table 2 for needling processing, the driving assembly 6 is started to move the needling plate 5 downward to needle the carbon-carbon preform. When the needling plate 5 moves upward, the guide rod 4 will drive the tension spring 35 and the ratchet pawl 36 to move upward simultaneously. During the upward movement of the tip of the ratchet pawl 36, it will form a connection with the ratchet teeth of the ratchet 33 that are not covered by the needle pitch adjusting cover plate 37, thereby pushing the ratchet 33 to rotate, and then driving the first transmission wheel 34 to rotate through the first rotating shaft 32. When the first transmission wheel 34 rotates, it can drive the second transmission wheel 74 to rotate through the transmission system 7. When the second transmission wheel 74 rotates, it drives the first transmission shaft 13 to rotate, and thus can also drive the sliding transmission wheel 14 to rotate. The sliding transmission wheel 14 can drive the driving wheel 21 to rotate through a belt / chain, and thus can drive the rotating table 2 to rotate. That is to say, after each vertical up-and-down movement of the needling plate 5, it can synchronously drive the rotating table 2 to rotate, so that the set position of the carbon-carbon preform is located below the needling plate 5 waiting for the needling plate 5 to perform needling processing. As described above, through the needle pitch adjusting cover plate 37, the position of the ratchet teeth of the ratchet 33 that the ratchet pawl 36 can contact and push can be controlled, so that the rotation angle of the ratchet 33 each time can be controlled. Thus, the rotation angle of the rotating table 2 can also be controlled.

[0031] The variable pitch synchronous needling mechanism provided by the present invention can flexibly adjust the needling pitch, meet the requirements of different products for the needle pitch, adapt to the processing needs of different carbon-carbon preforms, and improve the diversity and quality of products. In addition, through the synchronous needling and needle pitch actions, the uniformity of the needling effect can be effectively guaranteed, thereby greatly reducing the damage and defects of the carbon-carbon preform. It can also improve production efficiency and reduce production costs.

[0032] Those skilled in the art should understand that although the present invention is described in the form of multiple embodiments, not each embodiment only contains an independent technical solution. Such narration in the specification is only for clarity. Those skilled in the art should understand the specification as a whole and consider the technical solutions involved in each embodiment as ways that can be combined with each other to form different embodiments to understand the protection scope of the present invention.

[0033] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected" and "coupled" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0035] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein. That is, equivalent changes, modifications and combinations made without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A variable-pitch synchronous acupuncture mechanism, characterized in that: It includes a stand, which is connected to a rotating table. The stand is provided with a variable distance adjustment component above the rotating table through a support arm. The variable distance adjustment component is connected to a retractable needling plate through a guide rod. A driving component for controlling the movement of the needling plate is arranged in the variable distance adjustment component, and the variable distance adjustment component is connected to the rotating table through a transmission system.

2. The variable-pitch synchronous acupuncture mechanism according to claim 1, characterized in that: The variable pitch adjustment assembly includes a shell fixedly connected to the support arm, a first rotating shaft is arranged in the shell, a ratchet is arranged at one end of the first rotating shaft, and a first transmission wheel is arranged at the other end, and a pair of slidably connected guide rods are respectively arranged on the shells on both sides of the ratchet, wherein a pair of guide rods on one side is fixedly connected with a tension spring, and a pair of guide rods on the other side is rotatably connected with a ratchet pawl, and the shell is also provided with a stitch distance adjustment cover for covering the ratchet teeth of the ratchet.

3. The variable-pitch synchronous acupuncture mechanism according to claim 2, characterized in that: The stitch length adjustment cover plate comprises a connecting portion with an arc-shaped groove for connecting with the housing and an arc-shaped covering portion for covering the ratchet teeth of the ratchet wheel.

4. The variable-pitch synchronous acupuncture mechanism according to claim 2, characterized in that: The needle distance adjustment cover plate comprises a connecting portion with an arc groove for connecting with the housing, a complete circular panel and a continuous or discontinuous arc covering portion.

5. The variable-pitch synchronous acupuncture mechanism according to claim 1, characterized in that: The driving component is a telescopic cylinder or a telescopic motor.

6. The variable-pitch synchronous acupuncture mechanism according to claim 1, characterized in that: The platform is provided with a guide rail, the rotating platform can move horizontally on the guide rail, the rotating platform is provided with a driving wheel, the platform is provided with a first transmission shaft parallel to the guide rail, the first transmission shaft is provided with a sliding transmission wheel, and the sliding transmission wheel is connected to the driving wheel through a belt / chain.

7. The variable-distance synchronous acupuncture mechanism according to claim 6, characterized in that: The slip drive wheel is configured to have the same size as the drive wheel.

8. The variable-pitch synchronous acupuncture mechanism according to claim 1, characterized in that: The transmission system is a belt / chain transmission system, including a driven wheel, a first guide wheel, a second guide wheel and a second transmission wheel which are arranged in the same vertical plane as the first transmission wheel and connected by a belt / chain, the second transmission wheel is arranged at the end of the first transmission shaft, the first guide wheel and the second guide wheel are arranged on the support arm of the platform, respectively located above and below the second transmission wheel in the vertical direction, and are mainly used to smoothly turn and tension the belt / chain toward the second transmission wheel, and the driven wheel is arranged at the lower part of the support arm for the return of the belt / chain to the first transmission wheel.

9. The variable-distance synchronous acupuncture mechanism according to claim 8, characterized in that: The size of the second transmission wheel is set to be the same as that of the first transmission wheel.

10. The variable-distance synchronous acupuncture mechanism according to claim 6 or claim 8, characterized in that: The belt / chain is a synchronous belt.

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