Single-cylinder injection device

Abstract

The utility model discloses a single-cylinder injection device which comprises a driving motor, a motor flange and an injection cylinder barrel, an injection cylinder piston is arranged in the injection cylinder barrel, an injection structure is arranged on the side, away from the driving motor, of the injection cylinder barrel, a rotating structure is arranged in the injection cylinder piston and comprises a spline barrel, and a transmission shaft is arranged on the inner wall of the spline barrel. According to the injection device, the corresponding rotating structure is arranged in the piston of the injection cylinder, the spline barrel can drive the transmission shaft to rotate through the rotating piece arranged in the rotating structure, and therefore the driving action of the injection device is achieved; meanwhile, a corresponding fixing structure is arranged to fix the radial position of the injection cylinder piston, the injection cylinder piston is prevented from synchronously rotating along with the transmission shaft, stress is dispersed, and meanwhile, a corresponding liquid display structure is arranged, so that the content of lubricating oil is convenient to observe.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine technical field, especially a single cylinder injection device. BACKGROUND

[0002] At present, the injection device of injection molding machine has single cylinder injection and double cylinder injection, the two cylinder bodies of double cylinder injection are not synchronous, and the injection screw is not on the same straight line, which is easy to cause slow reaction, uneven stress, compared with double cylinder injection, the structure of single cylinder injection is more compact, occupies smaller space, and the oil feeding is more balanced, and the stress is more uniform, so it is widely used in high-speed injection occasions, but in the traditional single cylinder injection, the sealing element in the hydraulic cylinder bears both sliding axial force and rotating radial force during the movement of the piston, long-term friction can cause the sealing element to fail easily, thereby reducing the sealing performance and causing the oil cylinder to leak, which greatly reduces the injection effect. Moreover, the oil cylinder is sealed for use, and the internal lubrication condition of the oil cylinder cannot be observed in time, which causes the lubricating oil to be added in time, and affects the actual injection use. SUMMARY

[0003] The utility model discloses a single cylinder injection device, which solves the problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a single cylinder injection device, including drive motor and the motor flange of setting in drive motor output side, one side of motor flange is provided with injection cylinder, the inside of injection cylinder is provided with injection cylinder piston, one side of injection cylinder far away from drive motor is provided with the injection structure for completing the injection action, the inside of injection cylinder piston is provided with the rotation structure for driving the rotation of injection structure, the rotation structure includes spline barrel, the inner wall of spline barrel is provided with transmission shaft, one side of transmission shaft is provided with rotating part, the outer wall of injection structure is provided with the fixed structure for fixing the radial position of injection cylinder piston, one side of motor flan is provided with liquid display structure for showing the content of lubricating oil.

[0005] Preferably, the injection structure includes an injection seat, a storage machine barrel is rotatably connected to the side of the injection seat away from the drive motor, a transmission screw is connected to the inner wall of the storage machine barrel, and a screw retainer ring is sleeved on the side of the transmission screw close to the drive motor.

[0006] Preferably, the output end of the drive motor and the inner wall of the spline barrel are connected, the rotating part includes bearings one, two, three and four arranged horizontally and transversely on the outer wall of the transmission shaft, and a connecting plate is fixedly connected to the inner wall of the injection seat and located outside the injection cylinder piston.

[0007] Preferably, the fixing structure comprises anti-rotation seats arranged symmetrically, one side of the anti-rotation seat is fixedly connected to the outer wall of the connecting plate, the other side of the anti-rotation seat is slidably connected with an anti-rotation guide rod, one side of the anti-rotation guide rod is fixedly connected to the outer wall of the injection seat.

[0008] Preferably, the injection cylinder is provided with hydraulic structures for pushing the injection cylinder piston to move on both sides, the hydraulic structure comprises an injection cylinder rear cover, the outer wall of the injection cylinder rear cover is slidably connected with the inner wall of the injection cylinder piston, the top end of the injection cylinder rear cover is provided with a rear oil port, the side of the injection cylinder cylinder away from the injection cylinder rear cover is provided with an injection cylinder front cover, the top end of the injection cylinder front cover is provided with a front oil port, the inner wall of the injection cylinder front cover is slidably connected with the outer wall of the injection cylinder piston, the side of the injection cylinder rear cover close to the driving motor and connected with the spline cylinder is provided with bearing five.

[0009] Preferably, the liquid display structure comprises a pressure-resistant oil pipe, the pressure-resistant oil pipe is arranged on the outer wall of the injection cylinder rear cover, the outer wall of the injection cylinder rear cover is symmetrically provided with oil injection ports, and the input end of the oil injection port is fixedly connected with the side of the pressure-resistant oil pipe.

[0010] The technical effects and advantages of the utility model are as follows:

[0011] The utility model discloses a corresponding rotating structure is arranged in the injection cylinder piston, utilizes the rotating part arranged in it to make spline cylinder can drive transmission shaft to rotate, to realize the driving action of injection device, simultaneously sets up corresponding fixing structure, fixes the radial position of injection cylinder piston, avoids its synchronous rotation with transmission shaft, makes stress dispersion, simultaneously sets up corresponding liquid display structure, and the lubricating oil content is convenient for observation. DRAWINGS

[0012] Figure 1 It is the overall structure of the utility model sectional view.

[0013] Figure 2 It is the utility model Figure 1 It is the enlarged view of structure in A place.

[0014] Figure 3 It is the anti-rotation structure of the utility model cut-off schematic view.

[0015] Figure 4 It is the liquid display structure side sectional view of the utility model.

[0016] In the figure: 1, drive motor; 2, motor flange; 3, injection cylinder rear cover; 301, oil filling port; 4, rear oil port; 5, injection cylinder barrel; 6, injection cylinder piston; 7, spline barrel; 8, transmission shaft; 9, front oil port; 10, injection cylinder front cover; 11, connecting plate; 12, injection seat; 13, screw retainer; 14, transmission screw; 15, material storage machine barrel; 16, bearing one; 17, bearing two; 18, bearing three; 19, bearing four; 20, bearing five; 21, pressure-resistant oil pipe; 22, anti-rotation guide rod; 23, anti-rotation seat. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] The utility model provides a kind of single cylinder injection device as Figures 1-4 As shown in the figure, a kind of single cylinder injection device, including drive motor 1 and the motor flange 2 of setting in the output side of drive motor 1, motor flange 2 side is provided with injection cylinder barrel 5, injection cylinder barrel 5 inside is provided with injection cylinder piston 6, injection cylinder barrel 5 side away from drive motor 1 is provided with injection structure for completing injection action, injection cylinder piston 6 inside is provided with rotation structure for driving injection structure rotation, rotation structure includes spline barrel 7, spline barrel 7 inner wall is provided with transmission shaft 8, transmission shaft 8 side is provided with rotating piece, injection structure outer wall is provided with the fixed structure for fixing the radial position of injection cylinder piston 6, motor flange 2 side is provided with the liquid display structure for showing lubricating oil content.

[0019] It needs to be explained that by setting corresponding rotation structure in injection cylinder piston 6, the rotating piece arranged therein is used to make spline barrel 7 drive transmission shaft 8 to rotate, to realize the driving action of injection device, and corresponding fixed structure is arranged, to fix the radial position of injection cylinder piston 6, avoid its synchronous rotation with transmission shaft 8, make stress dispersion, and corresponding liquid display structure is arranged, to facilitate the observation of lubricating oil content, further, drive motor 1 is installed on motor flange 2, and spline barrel 7 is in transmission connection with drive motor 1.

[0020] Injection structure includes injection seat 12, injection seat 12 side away from drive motor 1 is rotatably connected with material storage machine barrel 15, material storage machine barrel 15 inner wall is connected with transmission screw 14, and screw retainer 13 is arranged on the side of transmission screw 14 close to drive motor 1.

[0021] Further, the injection cylinder piston 6 moves horizontally and laterally in the spline barrel 7, and the transmission shaft 8 is connected with the screw block 13 to drive the transmission screw 14 to perform the injection action.

[0022] The output end of the drive motor 1 is connected with the inner wall of the spline barrel 7, and the rotating member includes the bearing one 16, the bearing two 17, the bearing three 18 and the bearing four 19 arranged in sequence on the outer wall of the transmission shaft 8, and the connecting plate 11 is fixedly connected to the inner wall of the injection seat 12 and located on the outer wall of the injection cylinder piston 6.

[0023] Further, the injection cylinder piston 6 is provided with a stepped hole at the front end face, and the injection cylinder piston 6 is provided with the connecting plate 11 at the rear end, wherein the inner side face of the bearing abuts against the stepped face of the stepped hole, and the outer side face of the bearing abuts against the inner side face of the connecting plate 11 and cooperates with the sealing member.

[0024] The fixing structure includes the anti-rotation seat 23 arranged symmetrically, one side of the anti-rotation seat 23 is fixedly connected to the outer wall of the connecting plate 11, the other side of the anti-rotation seat 23 is slidably connected with the anti-rotation guide rod 22, and one side of the anti-rotation guide rod 22 is fixedly connected to the outer wall of the injection seat 12.

[0025] Further, the anti-rotation seat 23 is fixedly connected to the outer wall of the connecting plate 11 by the bolts, and the sliding hole is arranged on the side of the anti-rotation seat 23 away from the connecting plate 11, so that the anti-rotation seat 23 can move horizontally and laterally along the anti-rotation guide rod 22, and the anti-rotation guide rod 22 is also fixed to the outer wall of the injection seat 12 by the fixing bolts, so that the radial rotation of the injection cylinder piston 6 can be effectively limited by the anti-rotation guide rod 22, but the horizontal position movement of the injection cylinder piston 6 is not affected.

[0026] The hydraulic structure for pushing the injection cylinder piston 6 to move is arranged on both sides of the injection cylinder barrel 5, and the hydraulic structure includes the injection cylinder rear cover 3, the outer wall of the injection cylinder rear cover 3 is slidably connected with the inner wall of the injection cylinder piston 6, the rear oil port 4 is arranged at the top end of the injection cylinder rear cover 3, the injection cylinder front cover 10 is arranged on the side of the injection cylinder barrel 5 away from the injection cylinder rear cover 3, the front oil port 9 is arranged at the top end of the injection cylinder front cover 10, the inner wall of the injection cylinder front cover 10 is slidably connected with the outer wall of the injection cylinder piston 6, and the bearing five 20 is arranged at the connection between the injection cylinder rear cover 3 and the spline barrel 7 and close to the drive motor 1.

[0027] Further, when the injection molding machine melts the plastic, the driving motor 1 rotates, the spline on the output shaft inserted into the spline barrel 7 matches the hole, drives the spline barrel 7 to rotate, the spline barrel 7 drives the transmission shaft 8 to rotate, the transmission screw 14 is fixed to the rear end of the transmission shaft 8 through the screw retainer 13, so that the transmission shaft 8 drives the transmission screw 14 to rotate, the plastic particles enter with the rotation of the transmission screw 14 and gradually become molten; when injecting, the hydraulic oil enters the injection cylinder 5 from the rear oil port 4, drives the injection cylinder piston 6 to slide forward in the spline barrel 7, drives the transmission screw 14 to move forward together, and completes the injection action.

[0028] The liquid display structure includes a pressure-resistant oil pipe 21 arranged on the outer wall of the injection cylinder rear cover 3, and the outer wall of the injection cylinder rear cover 3 is symmetrically provided with an oil inlet port 301, and the input end of the oil inlet port 301 is fixedly connected with the side of the pressure-resistant oil pipe 21.

[0029] Further, the liquid display structure connects the upper and lower lubricating oil ports of the injection cylinder rear cover 3 through a pressure-resistant oil pipe 21 made of oil-resistant transparent rubber hose, so that the liquid level of the lubricating oil in the injection cylinder 5 is clear at a glance, and the lubricating oil is injected through the two lubricating oil ports to lubricate and cool the transmission part, that is, the connection part of the driving motor 1 and the transmission part.

[0030] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A single cylinder injection device comprising a drive motor (1) and a motor flange (2) provided at the output side of the drive motor (1), one side of the motor flange (2) being provided with an injection cylinder (5), the inside of the injection cylinder (5) being provided with an injection cylinder piston (6), characterized in that, The injection cylinder (5) is provided with an injection structure for completing the injection action away from the driving motor (1), the injection cylinder piston (6) is internally provided with a rotating structure for driving the injection structure to rotate, the rotating structure comprises a spline barrel (7), the inner wall of the spline barrel (7) is provided with a transmission shaft (8), one side of the transmission shaft (8) is provided with a rotating part, the outer wall of the injection structure is provided with a fixing structure for fixing the radial position of the injection cylinder piston (6), one side of the motor flange (2) is provided with a liquid display structure for displaying the content of lubricating oil.

2. A single cylinder injection device according to claim 1, characterized in that The injection structure comprises an injection seat (12), the injection seat (12) is rotatably connected with a storage machine barrel (15) away from one side of the driving motor (1), the inner wall of the storage machine barrel (15) is connected with a transmission screw (14), and the transmission screw (14) is sleeved with a screw retainer (13) close to one side of the driving motor (1).

3. A single cylinder injection device according to claim 2, characterized in that The output end of the driving motor (1) and the inner wall of the spline barrel (7) are connected, the rotating part comprises a bearing one (16), a bearing two (17), a bearing three (18) and a bearing four (19) arranged in sequence on the outer wall of the transmission shaft (8), and the shell of the injection seat (12) is fixedly connected with a connecting plate (11) on the outer wall of the injection cylinder piston (6).

4. A single cylinder injection device according to claim 2, wherein The fixing structure comprises symmetrically arranged anti-rotation seats (23), one side of the anti-rotation seat (23) is fixedly connected to the outer wall of the connecting plate (11), and the other side of the anti-rotation seat (23) is slidably connected with an anti-rotation guide rod (22), and one side of the anti-rotation guide rod (22) is fixedly connected with the outer wall of the injection seat (12).

5. A single cylinder injection device according to claim 1, wherein The injection cylinder (5) is provided with a hydraulic structure for pushing the injection cylinder piston (6) to move on both sides, the hydraulic structure comprises an injection cylinder rear cover (3), the outer wall of the injection cylinder rear cover (3) and the inner wall of the injection cylinder piston (6) are slidably connected, the top end of the injection cylinder rear cover (3) is provided with a rear oil port (4), the injection cylinder (5) is provided with an injection cylinder front cover (10) away from the injection cylinder rear cover (3), the top end of the injection cylinder front cover (10) is provided with a front oil port (9), the inner wall of the injection cylinder front cover (10) and the outer wall of the injection cylinder piston (6) are slidably connected, and the connecting part of the injection cylinder rear cover (3) and the spline barrel (7) is provided with a bearing five (20) close to the driving motor (1).

6. A single cylinder injection device according to claim 5, wherein The liquid display structure comprises a pressure-resistant oil pipe (21), the pressure-resistant oil pipe (21) is arranged on the outer wall of the injection cylinder rear cover (3), the outer wall of the injection cylinder rear cover (3) is symmetrically provided with an oil inlet (301), and the input end of the oil inlet (301) is fixedly connected with the side of the pressure-resistant oil pipe (21).

Images