A mechanical arm locking device

Abstract

The utility model relates to the technical field of casting equipment, in particular to a mechanical arm locking device, which can overcome the gravity of a sand box and lock and position a main arm and a driven arm when the main arm and the driven arm are not synchronized, effectively alleviating the failure rate of the equipment and improving production efficiency; it comprises a mechanical arm, and mounting grooves are provided at the left and right ends of the lower part of the mechanical arm, a driven shaft is rotatably installed in the mounting groove through a shaft sleeve, a flip plate is hinged at the adjacent ends of the two driven shafts, the flip plate rotates synchronously with the driven shaft, the flip plate clamps the sand box, a driven wheel is sleeved on the right driven shaft, the driven wheel is located in the mounting groove, a positioning locking device is installed on the upper part of the mounting groove at the right end of the mechanical arm, and the positioning locking device cooperates with the driven wheel to lock the driven shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of casting equipment, in particular to a mechanical arm locking device. Background Art

[0002] The box flipping machine is a station in the casting production line, which is used to flip the sand box containing the cast sand mold 180 degrees to realize the closing process of the upper and lower boxes. The original box flipping machine uses an active mechanical arm and a driven mechanical arm. The driven mechanical arm is hard-connected. During the flipping process of the sand box, when the sand box is too large and too heavy, the active mechanical arm and the driven mechanical arm will be out of sync. If it is out of sync with the active mechanical arm driven by the servo motor, the driven mechanical arm will be damaged, resulting in the failure of the box flipping. The fallen sand box is damaged, and the sand mold is destroyed at the same time. The structure is not stable enough, the failure rate is high, there are safety hazards, and the production efficiency is affected. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a mechanical arm locking device which can overcome the gravity of the sand box and lock and position it when the active arm and the driven arm are not synchronized, thereby effectively alleviating the failure rate of the equipment and improving production efficiency.

[0004] The utility model discloses a mechanical arm locking device, comprising a mechanical arm, wherein mounting grooves are provided at the left and right ends of the lower part of the mechanical arm, a driven shaft is rotatably mounted in the mounting groove through a shaft sleeve, a flip plate is hinged at the adjacent ends of the two driven shafts, the flip plate rotates synchronously with the driven shaft, the flip plate clamps the sand box, a driven wheel is sleeved on the right driven shaft, the driven wheel is located in the mounting groove, a positioning locking device is installed on the upper part of the mounting groove at the right end of the mechanical arm, the positioning locking device cooperates with the driven wheel to lock the driven shaft; during the passive flipping process of the flip plate, when the flip plate flips and reaches the stop position, it stops at this position under the action of the positioning locking device, which plays a role of locking and positioning, and when the active arm and the driven arm are not synchronized, they can overcome the gravity of the sand box and stop at a suitable position on the driven wheel, effectively alleviating the failure rate and production efficiency of the equipment.

[0005] Preferably, the driven wheel is configured to be ratchet-shaped; the ratchet-shaped driven wheel can cooperate with the positioning locking device, and when the active arm and the driven arm are not synchronized, it can overcome the gravity of the sand box, stop at a suitable position on the driven wheel, and then be locked and positioned by the positioning locking device.

[0006] Preferably, a spline groove is provided at the joint position of the driven shaft and the driven wheel, and the key is located in the spline groove; the key can increase the connection strength between the driven shaft and the driven wheel, avoid slipping, improve the locking effect, and improve safety.

[0007] Preferably, the positioning locking device comprises a fixing plate, a guide sleeve, a spring seat, a spring and a positioning pin. The fixing plate is fixedly connected to the mounting groove at the right end of the mechanical arm, and the guide sleeve is installed in the middle of the top end of the fixing plate by a bolt. The spring seat is slidably installed on the upper part of the guide sleeve, and a spring is installed on the lower part of the spring seat. The spring is located at the lower part of the guide sleeve, and the lower part of the spring is connected to a push plate, which is slidably installed on the lower part of the guide sleeve. The lower part of the push plate is connected to a positioning pin, and the positioning pin slides through the lower part of the guide sleeve; during the passive flipping of the flip plate, the positioning pin also rises and falls with the rotation of the driven wheel and moves up and down in the guide sleeve. When the flip plate flips into place and stops, the positioning pin stops at this position under the action of the spring, and plays a role of locking and positioning by cooperating with the ratchet-shaped driven wheel. When the active arm and the driven arm are not synchronized, they can overcome the gravity of the sand box and stop at a suitable position on the driven wheel, effectively alleviating the failure rate and production efficiency of the equipment.

[0008] Preferably, a bolt is provided on the upper part of the guide sleeve, and the bolt passes through the top of the guide sleeve and contacts the top of the spring seat; adjusting the bolt on the upper part of the guide sleeve can adjust the position of the spring seat, control the compression rate of the spring, and thus control the locking force.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: during the passive flipping process, when the flip plate flips to the stop position, it stops at this position under the action of the positioning locking device, which plays a role of locking and positioning. When the active arm and the driven arm are not synchronized, it can overcome the gravity of the sand box and stop at a suitable position on the driven wheel, effectively alleviating the failure rate and production efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a structural schematic diagram of the positioning and locking device of the utility model;

[0012] Markings in the attached drawings: 1. flip plate; 2. driven shaft; 3. driven wheel; 4. key; 5. positioning locking device; 5-1. fixed plate; 5-2. guide sleeve; 5-3. spring seat; 5-4. spring; 5-5. positioning pin; 6. mechanical arm; 7. sand box. DETAILED DESCRIPTION

[0013] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0014] like Figure 1 to Figure 2As shown, mounting grooves are provided at the left and right ends of the lower part of the mechanical arm 6, and a driven shaft 2 is rotatably installed in the mounting groove through a shaft sleeve. A flip plate 1 is hinged at the adjacent ends of the two driven shafts 2, and the flip plate 1 rotates synchronously with the driven shaft 2. The flip plate 1 clamps the sand box 7. A driven wheel 3 is sleeved on the right driven shaft 2, and the driven wheel 3 is located in the mounting groove. A positioning locking device 5 is installed on the upper part of the mounting groove at the right end of the mechanical arm 6. The driven wheel 3 is set to be ratchet-shaped. A spline groove is provided at the combination position of the driven shaft 2 and the driven wheel 3, and the key 4 is located in the spline groove. The positioning locking device 5 includes a fixing plate 5-1, a guide sleeve 5-2, a spring seat 5-3, a spring 5-4 and Locating pin 5-5, the fixing plate 5-1 is fixedly connected in the installation groove at the right end of the mechanical arm 6, the middle part of the top of the fixing plate 5-1 is installed with a guide sleeve 5-2 by bolts, the upper part of the guide sleeve 5-2 is slidably installed with a spring seat 5-3, the lower part of the spring seat 5-3 is installed with a spring 5-4, the spring 5-4 is located at the lower part of the guide sleeve 5-2, the lower part of the spring 5-4 is connected with a push plate, the push plate is slidably installed at the lower part of the guide sleeve 5-2, the lower part of the push plate is connected with a locating pin 5-5, and the locating pin 5-5 slides through the lower part of the guide sleeve 5-2, the upper part of the guide sleeve 5-2 is provided with a bolt, the bolt penetrates the top of the guide sleeve 5-2 and contacts with the top of the spring seat 5-3;

[0015] The ratchet-shaped driven wheel 3 can cooperate with the positioning locking device 5. When the active arm and the driven arm are not synchronized, they can overcome the gravity of the sand box and stop at a suitable position on the driven wheel 3. Then, the positioning locking device 5 is used for locking and positioning. The key 4 can increase the connection strength between the driven shaft 2 and the driven wheel 3 to avoid sliding, improve the locking effect, and improve safety. During the passive flipping of the flip plate 1, the positioning pin 5-5 also rises and falls with the rotation of the driven wheel 3, and moves up and down in the guide sleeve 5-2. When the flip plate 1 is flipped and stopped, the positioning pin 5-5 stops at this position under the action of the spring 5-4, and plays a role of locking and positioning by cooperating with the ratchet-shaped driven wheel 3. When the active arm and the driven arm are not synchronized, they can overcome the gravity of the sand box and stop at a suitable position on the driven wheel 3, effectively alleviating the failure rate and production efficiency of the equipment. Adjusting the bolt on the upper part of the guide sleeve 5-2 can adjust the position of the spring seat 5-3, control the compression rate of the spring, and thus control the locking force.

[0016] like Figure 1 to Figure 2 As shown, a mechanical arm locking device of the utility model is provided. When the flip plate 1 is in the process of passive flipping, the positioning pin 5-5 is also lifted and lowered with the rotation of the driven wheel 3, and moves up and down in the guide sleeve 5-2. When the flip plate 1 flips into place and stops, the positioning pin 5-5 stops at this position under the action of the spring 5-4, and plays a locking and positioning role by cooperating with the ratchet-shaped driven wheel 3.

[0017] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A mechanical arm locking device, characterized in that: The invention comprises a mechanical arm (6), wherein installation grooves are provided at the left and right ends of the lower part of the mechanical arm (6), a driven shaft (2) is rotatably installed in the installation groove through a shaft sleeve, a flip plate (1) is hinged at the adjacent ends of the two driven shafts (2), the flip plate (1) rotates synchronously with the driven shaft (2), the flip plate (1) clamps the sand box (7), a driven wheel (3) is sleeved on the right driven shaft (2), the driven wheel (3) is located in the installation groove, a positioning locking device (5) is installed on the upper part of the installation groove at the right end of the mechanical arm (6), and the positioning locking device (5) cooperates with the driven wheel (3) to lock the driven shaft (2).

2. A mechanical arm locking device as claimed in claim 1, characterized in that: The driven wheel (3) is configured in a ratchet shape.

3. A mechanical arm locking device as claimed in claim 1, characterized in that: A spline groove is provided at the joint position between the driven shaft (2) and the driven wheel (3), and the key (4) is located in the spline groove.

4. A mechanical arm locking device as claimed in claim 1, characterized in that: The positioning locking device (5) comprises a fixed plate (5-1), a guide sleeve (5-2), a spring seat (5-3), a spring (5-4) and a positioning pin (5-5); the fixed plate (5-1) is fixedly connected to the right end mounting groove of the mechanical arm (6); the guide sleeve (5-2) is installed at the middle of the top end of the fixed plate (5-1) by bolts; the spring seat (5-3) is slidably installed on the upper part of the guide sleeve (5-2); the spring (5-4) is installed at the lower part of the spring seat (5-3); the spring (5-4) is located at the lower part of the guide sleeve (5-2); the lower part of the spring (5-4) is connected to a push plate; the push plate is slidably installed on the lower part of the guide sleeve (5-2); the lower part of the push plate is connected to a positioning pin (5-5); and the positioning pin (5-5) slides through the lower part of the guide sleeve (5-2).

5. A mechanical arm locking device as claimed in claim 4, characterized in that: The upper part of the guide sleeve (5-2) is provided with a bolt, which penetrates the top of the guide sleeve (5-2) and contacts the top of the spring seat (5-3).

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