Pneumatic burr cutting structure

Abstract

The utility model discloses a pneumatic burr cutting structure which comprises a stator, a static scraper, a rotor and a dynamic scraper, the stator is provided with an air inlet hole in the axial direction of the stator, the top of the static scraper is fixedly installed at the bottom end of the stator, and a plurality of static blades are formed at the bottom of the static scraper. The rotor is cylindrical and rotatably arranged on the peripheral faces of the stator and the static scraper in a sleeving mode, the rotor, the static scraper and the rotor form a closed cavity, an eccentric air outlet hole and an air inlet hole are formed in the side wall of the rotor, and the closed cavity is communicated with the air outlet hole. The dynamic scrapers are fixedly connected to the inner wall of the rotor and extend out of the bottom end of the rotor in the axial direction of the rotor to form a plurality of movable blades, and center shafts of the stator, the static scrapers, the rotor and the dynamic scrapers are coaxially arranged. According to the pneumatic burr cutting structure, the rotor is driven by compressed air to drive the dynamic scraper to rotate, the movable blade of the dynamic scraper and the static blade of the static scraper generate a reaming effect to cut burrs, and the burrs are thoroughly scraped or removed.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a pneumatic burr cutting structure. Background Art

[0002] In the manufacturing field, burrs or rough edges are often generated during processes such as injection molding and assembly. In the prior art, a relatively complex automation structure is often used, which is not only difficult to perform a more thorough treatment, but also complicated to operate and costly. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a pneumatic burr cutting structure, which is driven by compressed air at the factory end to scrape or remove the burrs, and has a simple structure, is easy to operate and has low cost.

[0004] In order to solve the above technical problems, the pneumatic burr cutting structure provided by the utility model comprises:

[0005] The stator is provided with an air inlet hole along the axial direction for gas to enter;

[0006] A static scraper, the top of which is fixedly mounted on the bottom of the stator, the central axis of the static scraper is coaxially arranged with the central axis of the stator, and a plurality of static blades are formed on the bottom of the static scraper;

[0007] The rotor is formed into a cylindrical shape and is rotatably sleeved on the outer circumference of the stator and the static scraper. The inner circumference of the rotor and the outer circumference of the stator and the static scraper form a closed cavity. The central axis of the rotor is coaxially arranged with the central axis of the stator. An eccentric air outlet is opened on the side wall of the rotor located at the position of the closed cavity. The air inlet, the closed cavity and the eccentric air outlet are connected.

[0008] A dynamic scraper is fixedly connected to the side wall of the rotor and rotates with the rotor relative to the static scraper. The dynamic scraper extends along the axial direction of the rotor to beyond the bottom end of the rotor and forms a plurality of dynamic blades that cooperate with the plurality of static blades. The central axis of the dynamic scraper is coaxially arranged with the central axis of the static scraper.

[0009] Preferably, the stator and the rotor are rotatably connected via a first sealed bearing; and the static scraper is rotatably connected via a second sealed bearing.

[0010] Preferably, the side wall of the stator between the position where the first sealed bearing is installed and the bottom position is formed as a hollow structure.

[0011] Preferably, the hollow structure is located in the closed cavity.

[0012] Preferably, the number of the eccentric air outlet holes is two, and outlets of the two eccentric air outlet holes face opposite directions.

[0013] Preferably, the first sealed bearing is sealed with the stator and the rotor;

[0014] The second sealed bearing is in sealing cooperation with the static scraper and the rotor.

[0015] Preferably, the rotor and the static scraper are rotatably connected via a second sealed bearing.

[0016] Preferably, a tapered hole is provided at the center of the bottom surface of the stator, and a tapered pin matching the tapered hole is formed at the top end of the static scraper.

[0017] Preferably, the dynamic scraper and the rotor are fixedly connected by interference fit.

[0018] Preferably, the air inlet hole is opened at the central axis position of the stator.

[0019] The utility model provides a pneumatic burr cutting structure, which drives the rotor with compressed air at the factory end to drive the dynamic scraper to rotate relative to the stator and the static scraper, and the dynamic blade of the dynamic scraper and the static blade of the static scraper produce a reaming effect to cut the burrs, and the burrs are scraped or removed more thoroughly; the embodiment of the utility model can adjust the rotor speed by adjusting the air intake speed, the rotor diameter, the size or eccentricity of the eccentric air outlet, and then adjust the reaming force, so as to deal with the burrs of materials with different strengths. The pneumatic burr cutting structure provided by the utility model has a simple structure, is easy to operate, and is pneumatically driven, low in cost, and high in safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the following briefly introduces the drawings required for use in the utility model. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of an embodiment of a pneumatic burr cutting structure of the utility model;

[0022] Figure 2 It is a cross-sectional view of an embodiment of a pneumatic burr cutting structure of the utility model;

[0023] Figure 3 It is a radial cross-sectional view of a rotor at an eccentric air outlet position of an embodiment of a pneumatic burr cutting structure of the utility model;

[0024] Figure 4 It is a schematic diagram of a stator of an embodiment of a pneumatic burr cutting structure of the utility model;

[0025] Figure 5 It is a schematic diagram of a static scraper of an embodiment of a pneumatic burr cutting structure of the utility model;

[0026] Figure 6 It is a schematic diagram of a dynamic scraper of an embodiment of a pneumatic burr cutting structure of the utility model;

[0027] In the figure, 1-stator; 11-air inlet; 12-hollow structure; 13-conical hole; 2-static scraper; 21-static blade; 22-conical pin; 3-rotor; 31-eccentric air outlet; 4-dynamic scraper; 41-dynamic blade; 5-first sealed bearing; 6-second sealed bearing; 7-closed cavity. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] refer to Figures 1 to 6 , showing a pneumatic burr cutting structure of the utility model, comprising:

[0030] The stator is provided with an air inlet hole along the axial direction for gas to enter;

[0031] A static scraper, the top of which is fixedly mounted on the bottom of the stator, the central axis of the static scraper is coaxially arranged with the central axis of the stator, and a plurality of static blades are formed on the bottom of the static scraper;

[0032] The rotor is formed into a cylindrical shape and is rotatably sleeved on the outer circumference of the stator and the static scraper. The inner circumference of the rotor and the outer circumference of the stator and the static scraper form a closed cavity. The central axis of the rotor is coaxially arranged with the central axis of the stator. An eccentric air outlet is opened on the side wall of the rotor. The air inlet, the closed cavity and the eccentric air outlet are connected.

[0033] A dynamic scraper is fixedly connected to the side wall of the rotor and rotates with the rotor relative to the static scraper. The dynamic scraper extends along the axial direction of the rotor to beyond the bottom end of the rotor and forms a plurality of dynamic blades that cooperate with the plurality of static blades. The central axis of the dynamic scraper is coaxially arranged with the central axis of the static scraper.

[0034] In the embodiment of the utility model, the compressed air at the factory end can enter the air inlet hole opened in the stator through, for example, a pipeline and an interface, and then enter the closed cavity, and then flow out from the eccentric air outlet hole opened in the rotor. Since the eccentric air outlet hole is eccentrically arranged (refer to Figure 3 ), when compressed air flows out from the eccentric air outlet, its reaction force drives the rotor to drive the dynamic scraper to rotate relative to the stator and the static scraper, and the dynamic blade of the dynamic scraper and the static blade of the static scraper produce a reaming effect to cut the burrs, and the burrs are scraped or removed more thoroughly; the embodiment of the utility model can adjust the rotor speed by adjusting the air intake speed, rotor diameter, the size or eccentricity of the eccentric air outlet, and then adjust the reaming force, so as to deal with burrs of materials with different strengths. The pneumatic burr cutting structure provided by the utility model has a simple structure, is easy to operate, and is pneumatically driven, low cost, and high safety.

[0035] In a specific embodiment, the stator and the rotor are rotatably connected through a first sealed bearing; the rotor and the static scraper are rotatably connected through a second sealed bearing. Preferably, the first sealed bearing is sealed with the stator and the rotor; the second sealed bearing is sealed with the static scraper and the rotor. It can be understood that in this specific embodiment, the rotor is rotatably connected to the stator and the static scraper through the first sealed bearing and the second sealed bearing respectively. At the same time, since the first sealed bearing and the second sealed bearing have good sealing performance, and the rotor, the first sealed bearing and the stator, and the rotor, the second sealed bearing and the static scraper are all sealed, the sealing of the closed cavity is ensured, and the compressed air entering the sealed cavity from the air inlet can only be discharged through the eccentric air outlet, thereby ensuring the pneumatic power. It should be noted that the rotor and the first sealed bearing, the stator and the first sealed bearing, the rotor and the second sealed bearing, the static scraper and the second sealed bearing can be sealed and connected, for example, through interference fit. It is not desired to be constrained by this. Other methods that can achieve fixed and sealed connection in the prior art can also be applied to the utility model.

[0036] In a specific embodiment, reference Figure 2 and Figure 4 The side wall of the stator between the position where the first sealed bearing is installed and the bottom position is formed as a hollow structure. Preferably, the hollow structure is located in the closed cavity. It can be understood that the purpose of setting the hollow structure is to facilitate the communication between the air inlet hole opened in the stator and the eccentric air outlet hole opened in the rotor in the closed cavity, so as to provide a circulation channel for compressed air.

[0037] In a specific embodiment, reference Figure 3, the number of the eccentric air outlet holes is two, and the outlets of the two eccentric air outlet holes face in opposite directions. It can be understood that when the compressed air flows out from the two eccentric air outlet holes facing in opposite directions, the two reaction forces generated generate torque relative to the central axis, further increasing the rotational power of the rotor; it is not desired to be constrained by this, and the number of the eccentric air outlet holes can be more, for example, three, four, five, etc., preferably evenly distributed along the circumference of the rotor, and more preferably the sum of the areas of the eccentric air outlet holes is smaller than the area of ​​the air inlet holes.

[0038] In a specific embodiment, reference Figure 2 and Figure 5 , a conical hole is provided at the center of the bottom surface of the stator, and a conical pin is formed at the top of the static scraper to cooperate with the conical hole. It can be understood that the static scraper and the stator are fixedly connected by the cooperation of the conical hole and the conical pin, and when the conical hole is a through hole, the sealing between the two is good to prevent compressed air leakage. Without being bound by this, the stator and the static scraper can also be fixedly connected by conventional means such as square holes, fasteners, buckles, etc. to achieve the static state of the static scraper.

[0039] In a specific embodiment, the dynamic scraper and the rotor are fixedly connected by interference fit. The invention does not wish to be bound by this, and the connection method between the dynamic scraper and the rotor is not limited to interference fit. For example, the fixed connection can be achieved by fasteners, snaps, etc. The dynamic scraper can be installed on the inner wall or outer wall of the rotor, for example.

[0040] In a specific implementation, the air inlet hole is opened at the central axis position of the stator.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pneumatic burr cutting structure, characterized in that: include: The stator is provided with an air inlet hole along the axial direction for gas to enter; A static scraper, the top of which is fixedly mounted on the bottom of the stator, the central axis of the static scraper is coaxially arranged with the central axis of the stator, and a plurality of static blades are formed on the bottom of the static scraper; The rotor is formed into a cylindrical shape and is rotatably sleeved on the outer circumference of the stator and the static scraper. The inner circumference of the rotor and the outer circumference of the stator and the static scraper form a closed cavity. The central axis of the rotor is coaxially arranged with the central axis of the stator. An eccentric air outlet is opened on the side wall of the rotor located at the position of the closed cavity. The air inlet, the closed cavity and the eccentric air outlet are connected. A dynamic scraper is fixedly connected to the side wall of the rotor and rotates with the rotor relative to the static scraper. The dynamic scraper extends along the axial direction of the rotor to beyond the bottom end of the rotor and forms a plurality of dynamic blades that cooperate with the plurality of static blades. The central axis of the dynamic scraper is coaxially arranged with the central axis of the static scraper.

2. The pneumatic burr cutting structure according to claim 1, characterized in that: The stator and the rotor are rotatably connected via a first sealed bearing; The static scraper is rotatably connected via a second sealed bearing.

3. The pneumatic burr cutting structure according to claim 2, characterized in that: The side wall of the stator between the position where the first sealed bearing is installed and the bottom position is formed as a hollow structure.

4. The pneumatic burr cutting structure according to claim 3, characterized in that: The hollow structure is located in the closed cavity.

5. The pneumatic burr cutting structure according to claim 4, characterized in that: The number of the eccentric air outlet holes is two, and the outlets of the two eccentric air outlet holes face in opposite directions.

6. The pneumatic burr cutting structure according to claim 2, characterized in that: The first sealed bearing is sealed with the stator and the rotor; The second sealed bearing is in sealing cooperation with the static scraper and the rotor.

7. The pneumatic burr cutting structure according to claim 1, characterized in that: A conical hole is provided at the center of the bottom surface of the stator, and a conical pin matching with the conical hole is formed at the top end of the static scraper.

8. The pneumatic burr cutting structure according to claim 1, characterized in that: The dynamic scraper and the rotor are fixedly connected through interference fit.

9. The pneumatic burr cutting structure according to claim 1, characterized in that: The air inlet hole is opened at the central axis position of the stator.

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