A fast and compact shell unloading device

Abstract

The present invention provides a fast and compact shell unloading device, comprising: a shell grabbing mechanism, which grabs a plurality of shells; an upper cam moving mechanism, which is connected to the shell grabbing mechanism and makes it rotate and move up and down; a lower cam moving mechanism, which is connected to the upper cam moving mechanism and makes it rotate and move up and down; a gear rack transmission mechanism, which is connected to the lower cam moving mechanism and makes it rotate; a crank connecting rod transmission mechanism, which is connected to the gear rack transmission mechanism and makes it rotate; and a servo drive mechanism, which is connected to the crank connecting rod transmission mechanism and gives it a driving force. The present invention simplifies complex movements through upper and lower double-layer space cams, and can move multiple shells with different needs at one time, meet the production rhythm, and improve production efficiency; it can kick out shells that are deformed due to the press-fitting primer, and can also move shells without production defects to the next station, so as to integrate multiple processes into the same machine and reduce space occupation.

Description

Technical Field

[0001] The invention relates to the field of small-caliber ammunition assembly, and in particular to a fast and compact cartridge case unloading device. Background Art

[0002] During the assembly process of small-caliber ammunition, after the primer is pressed into the cartridge case, a part of the cartridge case is deformed and needs to be removed after passing through the primer shape detection device. At the same time, the cartridge case with the primer pressed in also needs to be moved and fed into the inner coating mold. In order to improve the efficiency of the production line, an intelligent feeding mechanism is needed that can take into account both the removal of waste and the precise positioning of feeding. Summary of the invention

[0003] In view of the defects in the prior art, an object of the present invention is to provide a fast and compact cartridge case unloading device.

[0004] According to one aspect of the present invention, there is provided a fast and compact cartridge case unloading device, comprising:

[0005] A cartridge case grabbing mechanism, wherein the cartridge case grabbing mechanism grabs a plurality of cartridge cases;

[0006] An upper cam moving mechanism, the upper cam moving mechanism is connected to the shell grabbing mechanism and causes it to rotate and move up and down;

[0007] A lower cam moving mechanism, the lower cam moving mechanism is connected to the upper cam moving mechanism and causes it to rotate and move up and down;

[0008] A rack and pinion transmission mechanism, the rack and pinion transmission mechanism is connected to the lower cam moving mechanism and causes it to rotate;

[0009] A crank-connecting rod transmission mechanism, wherein the crank-connecting rod transmission mechanism is connected to the rack and pinion transmission mechanism to cause it to rotate;

[0010] A servo drive mechanism is connected to the crank-connecting rod transmission mechanism and provides driving force thereto.

[0011] Preferably, it further comprises a supporting mechanism, the servo drive mechanism is arranged at the supporting mechanism, the crank-connecting rod transmission mechanism and the gear rack transmission mechanism are located inside the supporting mechanism, and the lower cam moving mechanism and the upper cam moving mechanism are located above the supporting mechanism.

[0012] Preferably, it also includes a kicking mechanism, which is located below the path through which the shell grabbing mechanism rotates.

[0013] Preferably, the shell grabbing mechanism comprises:

[0014] A rotating shaft, wherein the rotating shaft is a T-shaped plate;

[0015] A connecting plate connected to the rotating shaft;

[0016] Connecting rods, two connecting rods are respectively connected to two ends of the connecting plate;

[0017] A moving plate, the moving plate is parallel to the connecting rod, and two ends of the moving plate are respectively connected to the connecting rod;

[0018] A vacuum suction head, wherein a plurality of the vacuum suction heads are arranged at the bottom of the movable plate;

[0019] Trachea connector, each vacuum suction head is equipped with one trachea connector.

[0020] Preferably, the upper cam moving mechanism comprises:

[0021] An upper cam shaft, the upper cam shaft is connected to the shell grabbing mechanism, and a limiting groove is provided on its outer wall;

[0022] A fixed cover, the fixed cover is sleeved on the outer periphery of the upper cam shaft, and the bottom of the fixed cover is fixed to the supporting mechanism;

[0023] a bushing, the bushing being nested between the upper cam shaft and the fixed cover;

[0024] A fixing flange, wherein the fixing flange is fixed to the outer side of the fixing cover;

[0025] An upper cam bearing follower, one end of which is clamped in the limiting groove, and the other end is fixed to the fixing flange.

[0026] Preferably, the lower cam moving mechanism comprises:

[0027] A cam sleeve, wherein an inverted V-shaped slide rail is provided on the outer wall of the cam sleeve from top to bottom;

[0028] A lower cam bearing follower, the lower cam bearing follower is located inside the cam sleeve, a side wall thereof protrudes and is clamped in the track, and a top thereof is connected and fixed to the upper cam shaft;

[0029] A clamping plate, the clamping plate being fixed to the bottom of the cam sleeve;

[0030] A gear shaft, the bottom end of which is connected to the gear rack transmission mechanism, and the top end of which is fixed to the clamping disk;

[0031] A needle roller bearing is arranged between the cam sleeve and the fixed cover.

[0032] Preferably, the inverted V-shaped slide rail and the limiting groove have the same height.

[0033] Preferably, the waste kicking mechanism comprises

[0034] A collecting cylinder, the collecting cylinder being located below a path through which the shell grabbing mechanism rotates;

[0035] A waste kicking pipe is connected to the collecting cylinder.

[0036] Preferably, the support mechanism comprises two support plates, dividing the space into an upper space and a lower space;

[0037] The shell grabbing mechanism, the servo driving mechanism, the upper cam moving mechanism and the lower cam moving mechanism are arranged in the upper space;

[0038] The crank-connecting rod transmission mechanism and the rack and pinion transmission mechanism are arranged in the lower space.

[0039] Preferably, it also includes a limit detection mechanism, which positions the shell grabbing mechanism through a sensor and a positioning pin.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] A fast and compact cartridge case unloading device in an embodiment of the present invention simplifies complex movements through upper and lower double-layer space cams. It can move multiple cartridge cases with different needs at one time, meet the production rhythm, and improve production efficiency. It can kick out cartridge cases that are deformed due to the press-fitting of primers, and can also move cartridge cases without production defects to the next workstation, thereby integrating multiple processes into the same machine and reducing space occupancy.

[0042] A fast and compact shell unloading device in the embodiment of the present invention greatly saves layout space by using gear racks, and has higher space utilization rate than the four-link structure in the prior art; two-layer space cams are used to achieve complex motion requirements, and the structure is simple and compact.

[0043] A fast and compact shell unloading device in an embodiment of the present invention uses a positioning device to ensure the accuracy of each rotation transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0045] Figure 1 It is a structural schematic diagram of a fast and compact shell unloading device in an embodiment of the present invention;

[0046] Figure 2 is a schematic diagram of an upper cam moving mechanism in an embodiment of the present invention;

[0047] Figure 3 is a schematic diagram of a cartridge case grabbing mechanism in an embodiment of the present invention;

[0048] Figure 4 is a schematic diagram of a lower cam moving mechanism in an embodiment of the present invention;

[0049] Figure 5 Schematic diagram of the connection structure of the upper cam moving mechanism, the lower cam moving mechanism and the rack and pinion transmission mechanism in the embodiment of the present invention;

[0050] Figure 6 is a schematic structural diagram of an upper cam shaft in an embodiment of the present invention;

[0051] Figure 7 is a schematic diagram of the cam sleeve structure in an embodiment of the present invention;

[0052] Figure 8 It is a schematic diagram of the structure of the limit detection mechanism in the embodiment of the present invention.

[0053] Among them, 1 is a servo drive mechanism, 2 is a crank connecting rod transmission mechanism, 3 is a limit detection mechanism, 4 is an upper cam moving mechanism, 5 is a shell grabbing mechanism, 6 is a lower cam moving mechanism, 7 is a gear rack transmission mechanism, 8 is an adjustment mechanism, 9 is a kicking mechanism, and 10 is a supporting mechanism;

[0054] 4.1 is the upper cam rotating shaft, 4.2 is the upper cam bearing follower, 4.3 is the fixing flange, and 4.4 is the bushing;

[0055] 5.1 is the rotating shaft, 5.2 is the connecting plate, 5.3 is the connecting rod, 5.4 is the air pipe joint, 5.5 is the vacuum suction head, 5.6 is the moving plate, and 5.7 is the cylindrical head screw;

[0056] 6.1 is the cam sleeve, 6.2 is the lower cam bearing follower, 6.3 is the set screw, 6.4 is the needle bearing, 6.5 is the clamping plate, 6.6 is the gear shaft, and 6.7 is the round nut. DETAILED DESCRIPTION

[0057] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0058] like Figure 1The figure is a schematic diagram of the structure of a fast and compact shell unloading device according to an embodiment of the present invention, which includes a servo drive mechanism 1, a crank-connecting rod transmission mechanism 2, an upper cam moving mechanism 4, a shell grabbing mechanism 5, a lower cam moving mechanism 6 and a gear rack transmission mechanism 7. The shell grabbing mechanism 5 grabs a number of shells; the upper cam moving mechanism 4 is connected to the shell grabbing mechanism 5 and causes it to rotate and move up and down; the lower cam moving mechanism 6 is connected to the upper cam moving mechanism 4 and causes it to rotate and move up and down; the gear rack transmission mechanism 7 is connected to the lower cam moving mechanism 6 and causes it to rotate; the crank-connecting rod transmission mechanism 2 is connected to the gear rack transmission mechanism 7 to cause it to rotate; and the servo drive mechanism 1 is connected to the crank-connecting rod transmission mechanism and gives it a driving force.

[0059] In this embodiment, the servo motor transmits power to the lower cam moving mechanism through the crank connecting rod and the gear rack, and the lower cam bearing follower drives the upper cam rotating shaft, thereby realizing the rotation and movement of the shell grabbing mechanism. The use of the gear rack greatly saves the layout space, and the space utilization rate is higher than that of the four-bar structure in the prior art; the use of two-layer space cams can realize complex movement requirements, and the structure is simple and compact.

[0060] In another embodiment of the present invention, it further includes a limit detection mechanism 3, a kicking mechanism 9 and a support mechanism 10. The limit detection mechanism 3 positions the shell grabbing mechanism through a sensor; the kicking mechanism 9 is installed below the moving path of the shell grabbing mechanism 5; and the support mechanism 10 includes two support plates, which serve as a support base for all other components.

[0061] In another embodiment of the present invention, an adjustment mechanism 8 is further included. The adjustment mechanism 8 fixes the entire device on the support mechanism 10 using an adjusting nut.

[0062] Reference Figure 2 In a preferred embodiment of the present invention, the upper cam moving mechanism 4 is composed of an upper cam rotating shaft 4.1, a cam bearing follower 4.2, a fixing flange 4.3, a bushing 4.4 and a fixing cover (not shown).

[0063] A limit groove is provided on the outside of the upper cam rotating shaft 4.1. Figure 6 . The inner side of the upper cam bearing follower 4.2 is stuck in the limit groove, and the outer side is fixedly connected to the fixed flange 4.3; the fixed cover covers the upper cam rotating shaft 4.1, and the fixed flange 4.3 is fixedly connected to the upper cam follower 4.2 and fixed to the fixed cover. The fixed cover is fixed and its fixing method is not limited. In this embodiment, it is fixed to the support mechanism 10 by bolts, that is, the fixed cover covers the upper cam moving mechanism and the lower cam moving mechanism. The bushing 4.4 is arranged between the fixed cover and the upper cam rotating shaft 4.1 to reduce the friction between the upper cam rotating shaft 4.1 and the fixed cover and play a sealing role.

[0064] Reference Figure 3 In a preferred embodiment of the present invention, the shell grabbing mechanism 5 includes a rotating shaft 5.1, a connecting plate 5.2, a connecting rod 5.3, an air pipe joint 5.4, a vacuum suction head 5.5, a movable plate 5.6 and a cylindrical head screw 5.7. The upper cam rotating shaft 4.1 is connected to the T-shaped rotating shaft 5.1 through a cylindrical head screw 5.7, the rotating shaft 5.1 is fixedly connected to the connecting plate 5.2, the connecting rod 5.3 combines the connecting plate 5.2 and the movable plate 5.6 together, and twenty shell-shaped customized vacuum suction cups 5.5 are placed in the movable plate 5.6, and air is sucked and exhaled through the air pipe joint 5.4. In this embodiment, each air pipe joint corresponds to a vacuum suction cup. The air pipe joint is controlled by a control system. According to the detection result of each shell, the control system can control the air pipe joint corresponding to the shell to perform separate suction or exhalation.

[0065] Reference Figure 4 In a preferred embodiment of the present invention, the lower cam moving mechanism comprises a cam sleeve 6.1, a lower cam bearing follower 6.2, a set screw 6.3, a needle bearing 6.4, a clamping plate 6.5, a gear shaft 6.6 and a round nut 6.7. The top of the lower cam bearing follower 6.2 is fixedly connected to the bottom of the upper cam rotating shaft 4.1, and the cam sleeve 6.1 is sleeved on the outside of the lower cam bearing follower 6.2; refer to Figure 7 The outer wall of the cam sleeve 6.1 is provided with an inverted V-shaped track, and the protruding part of the lower cam bearing follower 6.2 is clamped on the track and can move along the track. The gear rack transmission mechanism 7 is meshed with the gear shaft 6.6 to drive the gear shaft 6.6 to rotate; the gear shaft 6.6 and the cam sleeve 6.1 are fixed on the clamping plate 6.5 by the set screw 6.3, and the needle bearing 6.4 is located between the fixed cover and the cam sleeve 6.1 to reduce the friction between each other, and the cam bearing follower 6.2 passively moves back and forth on the upper slide rail of the cam sleeve 6.1. Among them, the height of the inverted V-shaped track is equal to the height and width of the limit groove to ensure the operation fit between the lower cam moving mechanism and the upper cam moving mechanism.

[0066] In a preferred embodiment of the present invention, the kicking mechanism 9 comprises a collection bucket, a flange and a kicking pipe. The shell grabbing mechanism 5 moves to the collection bucket position, the shell grabbing mechanism 5 back-blows the gas path, collects the problematic shells into the kicking slide pipe, and the entire collection bucket is fixed to a fixed platform or the like by flanges and bolts.

[0067] This embodiment simplifies complex movements through the upper and lower double-layer space cams, which can move multiple cartridges with different needs at one time, meet the production rhythm, and improve production efficiency; it can kick out the cartridges that are deformed due to the press-fitting of primers, and can also move the cartridges without production defects to the next workstation, thereby integrating multiple processes into the same machine and reducing space occupancy.

[0068] In another preferred embodiment of the present invention, a limit detection mechanism is also included. The limit detection mechanism includes a sensor and a limit pin. Figure 8 As shown, a limit bracket is fixed to one side of the rotating shaft 5.1, and a sensor is installed on the limit bracket. The sensor monitors the position of the limit bracket in real time, uploads the position information to the controller, and obtains the spatial position of the limit bracket through analysis, thereby obtaining the spatial position of the shell grabbing mechanism 5.

[0069] The positioning pin is inserted into a base plate with one end exposed outside and facing downward, and the base plate is fixed below the movable plate 5.6. When the shell grabbing mechanism 5 rotates to the angle threshold, the protruding part of the positioning pin touches the blocking mechanism provided at the angle threshold, thereby limiting the shell grabbing mechanism 5 from continuing to rotate, that is, achieving positioning.

[0070] This embodiment uses a limit detection mechanism to ensure the accuracy of each rotation transportation.

[0071] In other embodiments of the present invention, a preferred workflow is provided, which is as follows:

[0072] The servo drive mechanism 1 (drive motor) drives the crank connecting rod mechanism 2 to transmit power to the gear rack transmission mechanism 7;

[0073] The gear in the rack and pinion transmission mechanism 7 drives the gear shaft 6.6 to drive the cam sleeve 6.1 in the lower cam moving mechanism 6 to rotate;

[0074] Subsequently, the lower cam bearing follower 6.2 in the lower cam moving mechanism 6 is passively moved along the slide rail of the outer wall of the cam sleeve 6.1, that is, the lower cam bearing follower 6.2 moves up and down and rotates.

[0075] The lower cam bearing follower 6.2 drives the upper cam rotating shaft 4.1 in the upper cam moving mechanism 4 to rotate; at this time, the fixed shaft does not move, and the fixed flange and the upper cam bearing follower 4.2 also remain stationary. The limit groove of the upper cam rotating shaft 4.1 rotates under the clamping of the upper cam bearing follower 4.2.

[0076] The cam rotating shaft 4.1 drives the cartridge case grabbing mechanism to rotate. When the rotation reaches the threshold angle, the servo drive mechanism 1 (drive motor) rotates in the reverse direction, and the above process is followed in the reverse direction to achieve the reset of each mechanism.

[0077] Preferably, the shell gripping mechanism grabs the shells that have been installed with primers. Among these shells, some of the primers are not installed properly and need to be kicked out; the remaining qualified ones need to be moved to the next process. Specifically, the cylindrical head screw 5.7 in the shell gripping mechanism 5 is connected to the upper cam rotating shaft 4.1 to drive the entire shell gripping mechanism to move. When the cam bearing follower 6.2 in the lower cam moving mechanism 6 moves to the highest point, the shell gripping mechanism 5 rotates 112.5° and rises to the highest point; when the cam bearing follower 6.2 moves to the lowest point, the shell gripping mechanism 5 continues to rotate 112.5° and descends to the lowest point; that is, the maximum rotation angle of the shell gripping mechanism is 225°, the highest point is in the middle, and the two sides are the lowest points. From the highest point to the lowest point on both sides, each can rotate 112.5°.

[0078] That is, the present invention has three process fixed points. At the first fixed point (at this time, the cam bearing follower 6.2 is located at the first lowest point of the inverted V-shaped slide rail), the shell grabbing mechanism 5 uses the vacuum suction head 5.5 to suck the shell, and then the shell grabbing mechanism 5 rotates to the second fixed point (at this time, the cam bearing follower 6.2 is located at the highest point of the inverted V-shaped slide rail), and the partially deformed and compressed shells are back-blown in the air circuit and dropped into the collection bucket in the kicking mechanism 9. The shell grabbing mechanism 5 continues to rotate and reaches the third fixed point (at this time, the cam bearing follower 6.2 is located at the second lowest point of the inverted V-shaped slide rail), that is, it reaches the mold of the next process, and the positioning pin accurately positions the shell to be fed into the mold, and the sensor detects and positions the shell grabbing mechanism 5 each time.

[0079] It should be noted that the steps in the method provided by the present invention can be implemented by using corresponding modules, devices, units, etc. in the system. Those skilled in the art can refer to the technical solution of the system to implement the step flow of the method, that is, the embodiments in the system can be understood as preferred examples for implementing the method, which will not be elaborated here.

[0080] Those skilled in the art know that, in addition to implementing the system and its various devices provided by the present invention in a purely computer-readable program code, the system and its various devices provided by the present invention can be made to implement the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices provided by the present invention can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component; the devices for implementing various functions can also be considered as both software modules for implementing the method and structures within the hardware component.

[0081] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention. The above preferred features can be used in any combination without conflicting with each other.

Claims

1. A fast and compact cartridge case feeding device, characterized in that: include: A cartridge case grabbing mechanism, wherein the cartridge case grabbing mechanism grabs a plurality of cartridge cases; An upper cam moving mechanism, the upper cam moving mechanism is connected to the shell grabbing mechanism and causes it to rotate and move up and down; A lower cam moving mechanism, the lower cam moving mechanism is connected to the upper cam moving mechanism and causes it to rotate and move up and down; A rack and pinion transmission mechanism, the rack and pinion transmission mechanism is connected to the lower cam moving mechanism to make it rotate; A crank-connecting rod transmission mechanism, wherein the crank-connecting rod transmission mechanism is connected to the rack and pinion transmission mechanism and enables it to operate; A servo drive mechanism, the servo drive mechanism is connected to the crank-connecting rod transmission mechanism and provides driving force thereto; It also includes a support mechanism, wherein the servo drive mechanism is arranged on one side of the top of the support mechanism, and the stacked lower cam moving mechanism and upper cam moving mechanism are located on the other side of the top of the support mechanism; the crank connecting rod transmission mechanism and the gear rack transmission mechanism are located inside the support mechanism; Wherein, the upper cam moving mechanism comprises: An upper cam shaft, the upper cam shaft is connected to the shell grabbing mechanism, and a limiting groove is provided on its outer wall; A fixed cover, the fixed cover is sleeved on the outer periphery of the upper cam shaft, and the bottom of the fixed cover extends downward until it is fixed to the support mechanism; a bushing, the bushing being nested between the upper cam shaft and the fixed cover; A fixing flange, wherein the fixing flange is fixed to the outer side of the fixing cover; An upper cam bearing follower, one end of which is clamped in the limiting groove and the other end is fixed to the fixing flange; Wherein, the lower cam moving mechanism comprises: A cam sleeve, wherein an inverted V-shaped slide rail is provided on the outer wall of the cam sleeve from top to bottom; A lower cam bearing follower, the lower cam bearing follower is located inside the cam sleeve, a side wall thereof protrudes and is clamped in the slide rail, and a top thereof is connected and fixed to the upper cam shaft; A clamping plate, the clamping plate being fixed to the bottom of the cam sleeve; A gear shaft, the bottom end of which is connected to the gear rack transmission mechanism, and the top end of which is fixed to the clamping disk; A needle roller bearing is arranged between the cam sleeve and the fixed cover.

2. A fast and compact cartridge case unloading device according to claim 1, characterized in that: It also includes a kicking mechanism, which is located below the rotation path of the shell grabbing mechanism.

3. A fast and compact cartridge case unloading device according to claim 1, characterized in that: The shell grabbing mechanism comprises: A rotating shaft, wherein the rotating shaft is a T-shaped plate; A connecting plate connected to the rotating shaft; Connecting rods, two connecting rods are respectively vertically connected to two ends of the connecting plate; A moving plate, the moving plate is parallel to the connecting rod, and two ends of the moving plate are respectively connected to the connecting rod; A vacuum suction head, wherein a plurality of the vacuum suction heads are arranged at the bottom of the movable plate; Trachea connector, each vacuum suction head is equipped with one trachea connector.

4. A fast and compact cartridge case unloading device according to claim 1, characterized in that: The inverted V-shaped slide rail and the limiting groove have the same height and width.

5. A fast and compact cartridge case unloading device according to claim 2, characterized in that: The kicking mechanism includes A collecting cylinder, the collecting cylinder being located below the rotation path of the shell grabbing mechanism; A waste kicking pipe is connected to the collecting cylinder.

6. A fast and compact cartridge case unloading device according to claim 1, characterized in that: The support mechanism includes two support plates, dividing the space into an upper space and a lower space; The shell grabbing mechanism, the servo driving mechanism, the upper cam moving mechanism and the lower cam moving mechanism are arranged in the upper space; The crank-connecting rod transmission mechanism and the rack and pinion transmission mechanism are arranged in the lower space.

7. A fast and compact cartridge case unloading device according to any one of claims 1 to 6, characterized in that: It also includes a limit detection mechanism, which positions the shell grabbing mechanism through a sensor and a positioning pin.

Images