Hydraulic control circuit of cycloid motor

Abstract

The utility model discloses a hydraulic control oil circuit of a cycloidal motor, comprising an oil tank, a three-position four-way valve, a cycloidal motor, a counting mechanism and an electric control box, wherein the P port of the three-position four-way valve is connected to an oil inlet pipeline, the A port of the three-position four-way valve is connected to a first oil port of the cycloidal motor, the B port of the three-position four-way valve is connected to a second oil port of the cycloidal motor, and the T port of the three-position four-way valve is connected to an oil return pipeline; the oil inlet pipeline and the oil return pipeline are respectively connected to the oil tank; the output shaft of the cycloidal motor is provided with a first counting wheel, and the first counting wheel is in rolling contact with a second counting wheel of the counting mechanism; the counting mechanism and the three-position four-way valve are respectively electrically connected to the electric control box. According to actual production needs and problems encountered in actual production, reasonable design and improvement are made, which has high positioning accuracy, accurate stop position, and is not easy to cause mold locking.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control of molds, in particular to a hydraulic control oil circuit of a cycloid motor. Background Art

[0002] Electro-hydraulic control refers to a control method in hydraulic transmission and control that can accept analog or digital signals to continuously and proportionally control the output flow or pressure. At present, the following problems exist in the twisting (spinning) mold:

[0003] 1. A device that uses gears, racks, cylinders, etc. to drive and demould products with threads in the mold. However, this device occupies a large space outside the mold, which is not conducive to layout and installation. The rack cylinder is difficult to process and the quality is unstable.

[0004] 2. Another method is to use a hydraulic motor to drive the mold. A gear is installed on the motor head, which is driven by a chain or gear, and the solenoid valve controls the forward and reverse directions. However, this device has poor positioning accuracy, inaccurate stop position, and is prone to mold locking. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a hydraulic control oil circuit of a cycloid motor which has a simple structure, high positioning accuracy, accurate stop position and is not prone to mold locking.

[0006] The utility model solves the above-mentioned technical problems as follows:

[0007] The hydraulic control oil circuit of the cycloid motor comprises an oil tank, a three-position four-way valve, a cycloid motor, a counting mechanism and an electric control box, wherein the P port of the three-position four-way valve is connected to an oil inlet pipeline, the A port of the three-position four-way valve is connected to a first oil port of the cycloid motor, the B port of the three-position four-way valve is connected to a second oil port of the cycloid motor, and the T port of the three-position four-way valve is connected to an oil return pipeline; the oil inlet pipeline and the oil return pipeline are respectively connected to the oil tank;

[0008] The output shaft of the cycloid motor is provided with a first counting wheel, and the first counting wheel is in rolling contact with the second counting wheel of the counting mechanism; the counting mechanism and the three-position four-way valve are electrically connected to the electric control box respectively.

[0009] In the hydraulic control oil circuit of the cycloid motor of the utility model:

[0010] The electric control box receives the injection molding machine forward rotation signal input by the operator → the electric control box controls the three-position four-way valve to connect the oil circuit for the cycloid motor to rotate forward → the cycloid motor rotates forward, and at the same time the counting mechanism counts or calculates the stroke → after reaching the preset value → the electric control box controls the three-position four-way valve to be turned off → the cycloid motor stops rotating.

[0011] The electric control box receives the injection molding machine reversal signal input by the operator → the electric control box controls the three-position four-way valve to connect the oil circuit for the cycloidal motor to reverse → the cycloidal motor reverses, and the counting mechanism counts or calculates the stroke → after reaching the preset value → the electric control box controls the three-position four-way valve to cut off → the cycloidal motor stops rotating.

[0012] Furthermore, a cartridge relief valve and a two-position four-way valve are provided between the three-position four-way valve and the oil tank. The oil inlet pipeline is connected to the P2 port of the two-position four-way valve through the cartridge relief valve, and the T2 port of the two-position four-way valve is connected to the oil return pipeline through the cartridge relief valve. The function of the cartridge relief valve and the two-position four-way valve is to prevent the oil pressure of the hydraulic station from being too high. When the three-color pressure gauge shows that the oil pressure is too high, the cartridge relief valve and the two-position four-way valve start to work, overflow and release pressure, and reduce the oil pressure of the hydraulic station until the oil pressure returns to the normal range.

[0013] Furthermore, the oil inlet pipeline between the oil tank and the plug-in relief valve is provided with an oil suction filter, a plunger pump with an internal motor, a first one-way valve and a three-color pressure gauge in sequence according to the oil inlet direction.

[0014] Furthermore, the oil return pipelines are two in parallel, the first one is provided with a second one-way valve, and the other one is provided with an air cooler and an oil return filter in sequence according to the oil return direction.

[0015] Furthermore, the hydraulic control oil circuit of the cycloidal motor also includes a liquid level and temperature gauge and an air filter. The lower end of the liquid level and temperature gauge is inserted into the hydraulic oil in the oil tank, and the air filter is installed on the air circulation pipe of the oil tank.

[0016] The utility model has the following advantages over the prior art:

[0017] 1. The hydraulic control oil circuit of the cycloidal motor utilizes a solenoid valve (three-position four-way valve), a cycloidal motor, a counting mechanism and an electric control box. The output shaft of the cycloidal motor is provided with a first counting wheel, which is in rolling contact with the second counting wheel of the counting mechanism. The electric control box switches the three positions of the three-position four-way valve (forward, cut-off, reverse) to realize the control of the three working states of the cycloidal motor (forward, stop, reverse). What is ingenious is that during the forward / reverse process of the cycloidal motor, the first counting wheel is in rolling contact with the second counting wheel of the counting mechanism, so that the counting mechanism can record the number of revolutions of the cycloidal motor in real time and feed the number of revolutions back to the control box in real time. The control box then switches the three positions of the three-position four-way valve according to the preset value, so that the number of revolutions of the cycloidal motor can be accurately and real-time controlled, so that the mold can achieve high positioning accuracy and accurate stop position during the feeding / returning process, and it is not easy to cause the mold to lock.

[0018] 2. The utility model is easy to operate, has stable start and stop operation, and has a high degree of automation.

[0019] 3. The preset value can be adjusted according to different injection molding workpieces, and the stop can be set at any position.

[0020] 4. Application scope: Suitable for various types of electric injection molding machines, hydraulic injection molding machines, plastic product molds, thread cutting, unscrewing, and core extraction, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the hydraulic control oil circuit of the cycloid motor of Example 1.

[0022] Figure 2 It is a circuit control schematic diagram of the electric control box of Example 1.

[0023] Figure 3 It is a structural schematic diagram of the hydraulic control oil circuit of the cycloid motor of Example 2. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0025] Embodiment 1:

[0026] like Figure 1 As shown, the hydraulic control oil circuit of the cycloidal motor includes an oil tank 1, a three-position four-way valve 11, a cycloidal motor 15, a counting mechanism 16 and an electric control box 17, wherein the P port of the three-position four-way valve 11 is connected to an oil inlet pipeline 18, the A port of the three-position four-way valve 11 is connected to a first oil port 19 of the cycloidal motor 15, the B port of the three-position four-way valve 11 is connected to a second oil port 20 of the cycloidal motor 15, and the T port of the three-position four-way valve 11 is connected to an oil return pipeline 21; the oil inlet pipeline 18 and the oil return pipeline 21 are respectively connected to the oil tank 1;

[0027] The output shaft of the cycloid motor 15 is provided with a first counting wheel 22 , which is in rolling contact with a second counting wheel 24 of a counting mechanism 23 ; the counting mechanism 23 and the three-position four-way valve 11 are electrically connected to the electric control box 17 , respectively.

[0028] In the hydraulic control oil circuit of the cycloid motor of the utility model:

[0029] The electric control box 17 receives the injection molding machine forward rotation signal input by the operator → the electric control box 17 controls the three-position four-way valve 11 to connect the oil circuit for the forward rotation of the cycloidal motor 15 → the cycloidal motor 15 rotates forward, and at the same time the counting mechanism 23 counts or calculates the stroke → after reaching the preset value → the electric control box 17 controls the three-position four-way valve 11 to be cut off → the cycloidal motor 15 stops rotating.

[0030] The electric control box 17 receives the injection molding machine reversal signal input by the operator → the electric control box 17 controls the three-position four-way valve 11 to connect the oil circuit for the reversal of the cycloidal motor 15 → the cycloidal motor 15 reverses, and at the same time the counting mechanism 23 counts or calculates the stroke → after reaching the preset value → the electric control box 17 controls the three-position four-way valve 11 to be cut off → the cycloidal motor 15 stops rotating.

[0031] In this embodiment, Figure 2 As shown, the control signal ports on the electric control box 17 (using a PLC controller) are: ① is the forward input signal (NPN); ② is the reverse input signal (NPN); ③ is the forward stop signal output (NPN); ④ is the reverse stop signal output (NPN); ⑤ is the power input DC24V; ⑥ is the power input DC0V.

[0032] Embodiment 2:

[0033]

[0034] The technical parameters of the hydraulic station are as follows:

[0035] Internal motor: 4KW 4-level three-phase 380V

[0036] System rated pressure: 10MPa

[0037] System rated flow: 14L / min

[0038] Rated voltage of all solenoid valves: DC24V

[0039] Air cooler rated voltage: AC220V

[0040] Hydraulic oil: 46# anti-wear hydraulic oil

[0041] System cleanliness: NAS11 level System normal operating oil temperature range: 30-55℃ Other parts names, models, brands, quantities are as follows:

[0042] 23 Counting mechanism DG8030T-S1000-ZF DEEGS 2 15 Orbital Motor OMP160 DANFOSS 2 14 Oil return filter RFA-100*30 Jing Zhang 1 13 Air Cooler AH1417T-CA FZ 1 12 Second check valve CIT-04(5KG) JEHAD IMS 1 11 Three-position four-way valve DSG-03-3C2-D24-N1 YUKEN 2 10 Two-position four-way valve DSG-03-2B3B-D24-N1-50 YUKEN 1 9 Cartridge relief valve DARV10-26B-N-30 DA 1 8 Three color pressure gauge YYDE-25MPa JEHAD IMS 1 7 First check valve CIT-04(0.5KG) JEHAD IMS 1 6 Insert motor YE3-112M-4-HY10 Carter 1 5 Plunger pump HY10M-RP Hengyuan 1 4 Oil suction filter MF-08 JEHAD IMS 1 3 Air filter HS-1163 JEHAD IMS 1 2 Liquid level and temperature gauge YWZ-127T JEHAD IMS 1 1 tank AVG-YX200L JEHAD IMS 1 Serial number name model brand quantity

[0043] like Figure 3As shown, in this embodiment, the two sets of hydraulic control oil circuits of the cycloidal motors of embodiment 1 are arranged in parallel in the oil circuit. A cartridge relief valve 9 and a two-position four-way valve 10 are also arranged between the first set of three-position four-way valve 11 and the oil tank 1, and the oil inlet pipeline 18 is connected to the P2 port of the two-position four-way valve 10 through the cartridge relief valve 9, and the T2 port of the two-position four-way valve 10 is connected to the return oil pipeline 21 through the cartridge relief valve 9.

[0044] The oil inlet pipeline 18 between the oil tank 1 and the plug-in relief valve 9 is provided with an oil suction filter 4, a plunger pump 5 with an internal motor 6, a first non-return valve 7 and a three-color pressure gauge 8 in sequence according to the oil inlet direction.

[0045] The function of the plug-in relief valve 9 and the two-position four-way valve 10 is to prevent the oil circuit pressure of the hydraulic station from being too high. When the three-color pressure gauge 8 shows that the oil circuit pressure is too high, the plug-in relief valve 9 and the two-position four-way valve 10 start to work, overflow and release pressure, and reduce the oil circuit pressure of the hydraulic station until the oil pressure returns to the normal range.

[0046] The oil return pipelines 21 are two in parallel, the first of which is provided with a second one-way valve 12, and the other of which is provided with an air cooler 13 and an oil return filter 14 in sequence according to the oil return direction.

[0047] The hydraulic control oil circuit of the cycloid motor also includes a liquid level and liquid temperature gauge 2 and an air filter 3. The lower end of the liquid level and liquid temperature gauge 2 is inserted into the hydraulic oil in the oil tank 1, and the air filter 3 is installed on the air circulation pipe of the oil tank 1.

[0048] Figure 3 In the figure, in order to clearly show the various components, the cycloid motors 15 of the two three-position four-way valves 11, the first counting wheel 22, the counting mechanism 23, the second counting wheel 23 and the electric control box 17 are omitted in consideration of the picture size.

[0049] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. The hydraulic control oil circuit of the cycloid motor is characterized by: It includes an oil tank, a three-position four-way valve, a cycloidal motor, a counting mechanism and an electric control box, wherein the P port of the three-position four-way valve is connected to an oil inlet pipeline, the A port of the three-position four-way valve is connected to a first oil port of the cycloidal motor, the B port of the three-position four-way valve is connected to a second oil port of the cycloidal motor, and the T port of the three-position four-way valve is connected to an oil return pipeline; the oil inlet pipeline and the oil return pipeline are respectively connected to the oil tank; The output shaft of the cycloid motor is provided with a first counting wheel, and the first counting wheel is in rolling contact with the second counting wheel of the counting mechanism; the counting mechanism and the three-position four-way valve are electrically connected to the electric control box respectively.

2. The hydraulic control oil circuit of the cycloid motor according to claim 1, characterized in that: A cartridge relief valve and a two-position four-way valve are also provided between the three-position four-way valve and the oil tank. The oil inlet pipeline is connected to the P2 port of the two-position four-way valve through the cartridge relief valve, and the T2 port of the two-position four-way valve is connected to the oil return pipeline through the cartridge relief valve.

3. The hydraulic control oil circuit of the cycloid motor according to claim 2, characterized in that: The oil inlet pipeline between the oil tank and the plug-in relief valve is provided with an oil suction filter, a plunger pump with an internal motor, a first one-way valve and a three-color pressure gauge in sequence according to the oil inlet direction.

4. The hydraulic control oil circuit of the cycloid motor according to claim 1, characterized in that: The oil return pipelines are two in parallel, the first of which is provided with a second one-way valve, and the other of which is provided with an air cooler and an oil return filter in sequence according to the oil return direction.

5. The hydraulic control oil circuit of the cycloid motor according to claim 1, characterized in that: It also includes a liquid level and liquid temperature gauge and an air filter. The lower end of the liquid level and liquid temperature gauge is inserted into the hydraulic oil in the oil tank, and the air filter is installed on the air circulation pipeline of the oil tank.

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