Tension safety pin protection device

Abstract

The utility model relates to the field of transmission protection, and discloses a tension safety pin protection device which comprises a shaft, a chain wheel seat sleeved on the outer wall of the shaft, the chain wheel seat is in sliding fit with the shaft, a key is clamped between the inner wall of the chain wheel seat and the outer wall of the shaft, the chain wheel seat is fixedly connected with the shaft through the key, and a chain wheel is sleeved on the rear side of the outer wall of the chain wheel seat. A safety pin is vertically inserted between the top of the front side wall of the chain wheel seat and the top of the rear side wall of the chain wheel. Due to the design of the safety pin, the safety pin can be automatically broken when the torque exceeds a certain limit, so that the transmission of the torque is cut off, and a transmission system and equipment are protected from being damaged.

Description

Technical Field

[0001] The utility model relates to the field of transmission protection, in particular to a tension safety pin protection device. Background Art

[0002] In the transmission system of the paraffin wax molding machine, the output torque of the reducer needs to be transmitted to the wax disc through a series of transmission components to drive the wax disc to rotate and complete the paraffin molding process. In the actual production process, due to various reasons (such as unstable wax quality, mold wear, improper operation, etc.), the wax disc sometimes gets stuck, resulting in a sudden increase in the torque applied to the transmission system.

[0003] In the absence of a tension safety pin protection device, when the wax disc is stuck, the reducer will continue to output power in an attempt to overcome the obstruction, which will cause a sharp increase in stress inside the transmission system, and may cause serious consequences such as chain breaking, gear damage, or even the scrapping of the entire equipment. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies, the utility model provides a tension safety pin protection device.

[0005] The technical solution adopted by this utility model:

[0006] The rear side of the sprocket is provided with a retaining ring, the retaining ring is sleeved on the outer wall of the sprocket seat, the retaining ring slides with the sprocket seat, the front side wall of the retaining ring abuts the rear side wall of the sprocket, the outer wall of the retaining ring is threadedly connected with two top screws, and the inner end of the top screw abuts the outer wall of the sprocket seat.

[0007] Beneficial effects of the utility model:

[0008] The safety pin of the utility model is designed to automatically break when the torque exceeds a certain limit, thereby cutting off the transmission of the torque and protecting the transmission system and equipment from damage.

[0009] When the safety pin breaks, the equipment can be restored to normal operation by replacing it with a new one. Maintenance is simple and convenient. Compared with a broken chain or scrapped equipment, the cost of replacing the safety pin is lower, which helps to reduce the maintenance cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] Figure 2 yes Figure 1 Schematic diagram of the structure from the rear side perspective;

[0012] Figure 3 yes Figure 1 Right view;

[0013] Figure 4 yes Figure 3 Cross-section at AA;

[0014] Figure 5 yes Figure 1 Front view of

[0015] Figure 6 yes Figure 5 Cross-section view at the middle BB.

[0016] The specific reference numerals in all the drawings are: 1, shaft; 2, sprocket seat; 3, key; 4, sprocket; 5, safety pin; 6, stud; 7, nut; 8, retaining ring; 9, top screw. DETAILED DESCRIPTION

[0017] like Figure 1-6 As shown: A tension safety pin protection device includes a shaft 1, a sprocket seat 2 is sleeved on the outer wall of the shaft 1, the sprocket seat 2 and the shaft 1 slide together, a key 3 is clamped between the inner wall of the sprocket seat 2 and the outer wall of the shaft 1, the sprocket seat 2 is fixedly connected to the shaft 1 through the key 3, a sprocket 4 is sleeved on the rear side of the outer wall of the sprocket seat 2, the sprocket 4 and the sprocket seat 2 slide together, a safety pin 5 is vertically inserted between the top of the front side wall of the sprocket seat 2 and the top of the rear side wall of the sprocket 4, and the front and rear ends of the safety pin 5 respectively penetrate the front side wall of the sprocket seat 2 and the rear side of the sprocket 4 The outer wall of the stud 6 is threaded with a nut 7, and the nut 7 on the front side is tightly against the front side wall of the sprocket seat 2, and the nut 7 on the rear side is tightly against the rear side wall of the sprocket 4. The rear side of the sprocket 4 has a retaining ring 8, which is sleeved on the outer wall of the sprocket seat 2. The retaining ring 8 slides with the sprocket seat 2, and the front side wall of the retaining ring 8 is in contact with the rear side wall of the sprocket 4. The outer wall of the retaining ring 8 is threadedly connected to two top screws 9, and the inner end of the top screw 9 is tightly against the outer wall of the sprocket seat 2.

[0018] The tension safety pin protection device is installed in the transmission system of the paraffin molding machine, and the output shaft of the reducer is connected to the sprocket seat 2 through the shaft 1.

[0019] The sprocket seat 2 and the shaft 1 are slidably fitted via a key 3 to ensure that the sprocket seat 2 can rotate relative to the shaft 1 .

[0020] The sprocket 4 is sleeved on the rear side of the outer wall of the sprocket seat 2, and passes through the sprocket seat 2 and the sprocket 4 through a safety pin 5, and is fixed by studs 6 and nuts 7 at the front and rear ends to ensure that it will not fall off under normal working conditions.

[0021] The retaining ring 8 is sleeved on the outer wall of the sprocket seat 2 and abuts against the sprocket seat 2 through the top screw 9 to prevent the sprocket 4 from moving in the axial direction.

[0022] The output torque of the reducer is transmitted to the sprocket seat 2 through the shaft 1, and then to the sprocket 4.

[0023] The sprocket 4 drives the wax tray of the paraffin molding machine to rotate, completing the paraffin molding process.

[0024] The safety pin 5 plays a role in transmitting torque under normal working conditions. At the same time, due to the reduced diameter of the middle part, it is designed as a weak link, which is easy to break under abnormal circumstances.

[0025] If the wax disc becomes stuck, causing the torque on the transmission system to increase, when the torque exceeds the breaking limit of the safety pin 5, the safety pin 5 will break, thereby cutting off the transmission of the torque.

[0026] This avoids the aggravation of the jamming phenomenon caused by the continuous power output of the reducer, prevents the chain from being broken or even the equipment from being scrapped.

Claims

1. A tension safety pin protection device, characterized in that: The invention comprises a shaft (1), an outer wall of the shaft (1) is sleeved with a sprocket seat (2), the sprocket seat (2) and the shaft (1) are slidably matched, a key (3) is clamped between the inner wall of the sprocket seat (2) and the outer wall of the shaft (1), the sprocket seat (2) is fixedly connected to the shaft (1) through the key (3), a sprocket (4) is sleeved on the rear side of the outer wall of the sprocket seat (2), the sprocket (4) and the sprocket seat (2) are slidably matched, a safety pin (5) is vertically inserted between the top of the front side wall of the sprocket seat (2) and the top of the rear side wall of the sprocket (4), the front and rear ends of the safety pin (5) respectively penetrate the front side wall of the sprocket seat (2) and the rear side wall of the sprocket (4), and the safety pin (5) is fixedly connected to the shaft (1) through the key (3). The front and rear ends are fixedly connected with studs (6), the safety pin (5) and the stud (6) are an integral structure, the outer wall of the stud (6) is threadedly sleeved with a nut (7), the nut (7) on the front side is tightly pressed against the front side wall of the sprocket seat (2), and the nut (7) on the rear side is tightly pressed against the rear side wall of the sprocket (4), the rear side of the sprocket (4) has a retaining ring (8), the retaining ring (8) is sleeved on the outer wall of the sprocket seat (2), the retaining ring (8) and the sprocket seat (2) are slidably matched, the front side wall of the retaining ring (8) is pressed against the rear side wall of the sprocket (4), the outer wall of the retaining ring (8) is threadedly connected with two top screws (9), and the inner ends of the top screws (9) are tightly pressed against the outer wall of the sprocket seat (2).

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