Safety shear pin device of snow throwing vehicle

Abstract

The utility model discloses a safety shear pin device of a snow throwing vehicle, which relates to the technical field of snow throwing vehicles and comprises a front connecting disc, a rear connecting disc and a central shaft, the front connecting disc and the rear connecting disc are rotatably connected onto the central shaft, and corresponding insertion holes with the same size are arranged on one sides of the front connecting disc and the rear connecting disc deviating from the central shaft; a shearing pin body is inserted into the insertion hole, and a broken groove is formed in the position, corresponding to the joint of the front connecting disc and the rear connecting disc, of the shearing pin body; a limiting hole is formed in the outer diameter of the disc face of the front connecting disc or the rear connecting disc, and a positioning mechanism used for elastically fixing the shear pin body is arranged in the limiting hole. When the snow cutting wheel is blocked by foreign matters, the shearing pin body can be instantly sheared off, so that power output to the snow cutting wheel is interrupted, the snow cutting wheel is effectively protected, a worker can conveniently overhaul a blocking fault, the worker, the snow cutting wheel and the snow throwing machine are protected, meanwhile, loss caused by the blocking of the foreign matters can be reduced, and the snow throwing machine is safe and reliable. And the influence on work is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the snow thrower technical field, concretely relates to a snow thrower safety shearing pin device. BACKGROUND

[0002] The snow thrower is used for throwing the accumulated snow, frozen ice and the like on the road to the roadside, or directly throwing into the carriage. The snow thrower utilizes the high-speed rotating snow cutting wheel to shovel the ground accumulated snow and send into the snow throwing wheel for throwing, in the process of cutting snow, if the snow cutting wheel meets the foreign matter and is stuck, the snow cutting wheel blade can be destroyed instantaneously, and in serious case, the snow cutting wheel axle can be deformed, broken and the like, so that the snow thrower cannot work normally, the new snow cutting wheel is time-consuming and laborious to replace, and the maintenance is complex and the cost is high, therefore, the snow thrower safety shearing pin device with the protection mechanism is designed and proposed. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at solving the shortcoming that the snow cutting wheel of the snow thrower lacks the protection mechanism in the prior art, and provides a snow thrower safety shearing pin device. When the snow cutting wheel is seriously blocked, the snow thrower safety shearing pin device can be broken automatically, the snow cutting wheel can be effectively protected, the maintenance is convenient and fast, and the influence on work can be reduced.

[0004] In order to realize the above object, the utility model adopts the following technical scheme:

[0005] A snow thrower safety shearing pin device is designed, which comprises a front connecting disc, a rear connecting disc and a center shaft, the front connecting disc and the rear connecting disc are rotationally connected on the center shaft, and the front connecting disc and the rear connecting disc are provided with corresponding and same-size insertion holes on one side deviated from the center shaft; a shearing pin body is inserted in the insertion hole, the shearing pin body is provided with a break groove at the junction of the front connecting disc and the rear connecting disc; a limiting hole is arranged on the outer diameter of the disc surface of the front connecting disc or the rear connecting disc, and a positioning mechanism for elastically fixing the shearing pin body is arranged in the limiting hole.

[0006] Further, the front connecting disc is provided with a columnar boss on one side corresponding to the rear connecting disc, the center shaft is arranged on the axis of the columnar boss in a penetrating mode, the columnar boss is inserted in the rear connecting disc, and a bearing is arranged between the rear connecting disc and the columnar boss.

[0007] Further, a recess is arranged on the side of the front connecting disc deviated from the rear connecting disc, and a thrust bearing opposite to the end cap of the center shaft is arranged in the recess.

[0008] Further, a partition ring is arranged on the inner side of the shaft hole of the rear connecting disc, the partition ring divides the shaft hole of the rear connecting disc into a bearing groove and a pressing plate groove, and the outer ring of the bearing is fixed in the bearing groove.

[0009] Further, the pressing plate groove is provided with a pressing plate fixedly connected to the central shaft.

[0010] Further, the length of the shear pin is the same as the depth of the insertion hole on the front and rear connecting plates.

[0011] Further, the cross-sectional diameter of the breaking groove is smaller than the diameter of the shear pin, and the bottom of the breaking groove is a broken section, and the broken section is provided with a broken hook in the circumferential direction.

[0012] Further, the positioning mechanism comprises a steel ball, a compression spring and a jack arranged in the limiting hole in sequence, the jack is connected to the limiting hole in a threaded manner, and the steel ball is tightly pressed on the shear pin under the action of the compression spring.

[0013] Further, the bottom of the limiting hole has a smaller diameter than the diameter of the steel ball.

[0014] The snow thrower safety shear pin device has the advantages that the snow cutting wheel can be effectively protected, maintenance is convenient and fast, and the influence on work can be reduced.

[0015] (1) When the snow cutting wheel is stuck with foreign matter during work, if the resistance exceeds the maximum torque that the shear pin can withstand, the shear pin will be instantaneously sheared off, the power supplied to the snow cutting wheel is interrupted, the snow cutting wheel is effectively protected, the staff can conveniently overhaul the stuck fault, the staff, the snow cutting wheel and the snow thrower are protected, and the loss caused by the foreign matter sticking can be reduced.

[0016] (2) The shear pin and the positioning mechanism are simple in structure, can be quickly replaced on site after the shear pin is interrupted, the influence on snow removal work is reduced, the overhaul and maintenance efficiency is improved on one hand, and the difficulty of maintenance is reduced on the other hand. DRAWINGS

[0017] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0019] Figure 2 is a schematic diagram of the internal structure of the present application;

[0020] Figure 3 is a schematic diagram of the exploded view of the present application;

[0021] Figure 4This is a schematic diagram of the internal structure of the front connecting plate in this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the rear connecting disc in this utility model;

[0023] Figure 6 This is a schematic diagram of the shear pin in this utility model;

[0024] The markings in the diagram are as follows: 1. Front connecting plate; 11. Columnar boss; 12. Groove; 2. Rear connecting plate; 21. Insertion hole; 22. Limiting hole; 23. Spacer ring; 24. Bearing groove; 25. Pressure plate groove; 3. Central shaft; 4. Bearing; 5. Pressure plate; 6. Shear pin; 61. Broken groove; 62. Easy-break hook; 7. Steel ball; 8. Compression spring; 9. Set screw; 10. Thrust bearing. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," and "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "front" and "rear" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The structural features of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] See Figures 1-5A safety shear pin device for a snowplow includes a front connecting plate 1, a rear connecting plate 2, and a central shaft 3. The front connecting plate 1 connects to the snow-cutting wheel, and the rear connecting plate 2 connects to the drive shaft of the snowplow. The front connecting plate 1 and the rear connecting plate 2 are rotatably connected to the central shaft 3. To ensure a stable connection, a columnar boss 11 is provided on the side of the front connecting plate 1 corresponding to the rear connecting plate 2. The columnar boss 11 is inserted into the rear connecting plate 2, increasing the contact area between them. The central shaft 3 passes through the axis of the columnar boss 11. To ensure more stable rotation between the front connecting plate 1 and the rear connecting plate 2, a bearing 4 is provided between the rear connecting plate 2 and the columnar boss 11. The inner ring of the bearing 4 is fixedly connected to the columnar boss 11. To ensure a stable connection between the end of the central shaft 3 and the front connecting plate 1, a groove 12 is provided at the axial position on the side of the front connecting plate 1 away from the rear connecting plate 2. A thrust bearing 10 is provided in the groove 12, opposite to the nut at the end of the central shaft 3. The rear connecting plate 2 has a partition ring 23 inside the shaft hole. The partition ring 23 divides the shaft hole of the rear connecting plate 2 into a bearing groove 24 and a pressure plate groove 25. The outer ring of the bearing 4 is fixed in the bearing groove 24. The pressure plate 5 is provided in the pressure plate groove 25. The pressure plate 5 is fixedly connected to the central shaft 3. The pressure plate 5 is used to limit the rear connecting plate 2. Through holes are opened on the front connecting plate 1 and the rear connecting plate 2 to reduce the weight of the front connecting plate 1 and the rear connecting plate 2.

[0030] The front connecting plate 1 and the rear connecting plate 2 have corresponding and identical insertion holes 21 on the side off from the central axis 3. A shear pin 6 is inserted into the insertion hole 21. The shear pin 6 has a groove 61 at the junction of the front connecting plate 1 and the rear connecting plate 2. The cross-sectional diameter of the groove 61 is smaller than the diameter of the shear pin 6. The length of the shear pin 6 is the same as the depth of the insertion hole 21 on the front connecting plate 1 and the rear connecting plate 2. When the snow-cutting wheel encounters a foreign object and gets stuck, if the resulting resistance torque is greater than the maximum torque that the groove 61 can withstand, the shear pin 6 will break directly at the groove 61, cutting off the power output of the snowplow and protecting the snow-cutting wheel.

[0031] A limiting hole 22 is provided on the outer diameter of the front connecting plate 1 or the rear connecting plate 2. A positioning mechanism for elastically fixing the shear pin 6 is provided in the limiting hole 22. The positioning mechanism is used to temporarily fix the shear pin 6 in the limiting hole 22. The positioning mechanism includes a steel ball 7, a compression spring 8 and a set screw 9 arranged in sequence in the limiting hole 22. The set screw 9 is connected to the limiting hole 22 by a thread. The pressure of the steel ball 7 on the shear pin 6 can be adjusted by the set screw 9. Under the action of the compression spring 8, the steel ball 7 is pressed tightly on the shear pin 6. In order to prevent the steel ball 7 from entering the insertion hole 21 from the limiting hole 22, the bottom diameter of the limiting hole 22 is smaller than the diameter of the steel ball 7. The setting of the positioning mechanism can facilitate the removal and placement of the shear pin 6, and also facilitate the fixing of the shear pin 6, which can reduce the difficulty of maintenance and replacement.

[0032] This utility model's snowplow safety shearing pin device has a simple structure and is convenient and quick to maintain. It can effectively protect the snowplow wheel. On the one hand, the shearing pin 6, in cooperation with the positioning mechanism, facilitates maintenance and replacement. If the shearing pin 6 is interrupted, it can be quickly replaced on-site, reducing the impact on snow removal work, improving maintenance efficiency, and reducing maintenance difficulty. On the other hand, if foreign objects are stuck during snowplow operation, and the resistance exceeds the maximum torque that the shearing pin 6 can withstand, the shearing pin 6 will be sheared instantly, interrupting the power output to the snowplow wheel, thus effectively protecting the snowplow wheel. This facilitates the inspection and repair of stuck faults by workers, protecting personnel, the snowplow wheel, and the snowplow, while also reducing losses caused by foreign object jamming.

[0033] Specifically, in use, the bearing 4, which has been coated with grease, is interference-fitted with the front connecting plate 1 and the rear connecting plate 2. The front connecting plate 1 and the rear connecting plate 2 are locked in the middle by the thrust bearing 10 and the central shaft 3 for protection. Then, the steel ball 7, the compression spring 8, the set screw 9, and the shear pin 6 are assembled and grease is added. After installation, the front connecting plate 1 and the rear connecting plate 2 transmit torque through the shear pin. When the snow cutter wheel encounters a foreign object and gets stuck, the broken groove 61 on the shear pin 6 will be cut off instantly, interrupting the power transmission. Remove the foreign object, loosen the set screw 9, remove the broken shear pin 6, replace it with a new shear pin 6, and the snow cutter wheel can work normally.

[0034] Example 2

[0035] Reference Figure 6 As another preferred embodiment of this utility model, the difference from embodiment 1 is that the bottom of the groove 61 is a cross-section, and the bottom circumferential direction of the groove 61 is provided with an easy-break hook 62. By setting the easy-break hook 62, on the one hand, the groove 61 can be more easily broken after being stuck by foreign objects, and on the other hand, the cross-section of the groove 61 can be made flatter, which can ensure the complete interruption of power transmission, further protect the snow cutting wheel, and reduce the damage to the snow cutting wheel caused by foreign object jamming.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A safety shear pin device for a snowplow, comprising a front connecting plate (1), a rear connecting plate (2), and a central shaft (3), characterized in that, The front connecting plate (1) and the rear connecting plate (2) are rotatably connected to the central shaft (3). The front connecting plate (1) and the rear connecting plate (2) are provided with corresponding and identical insertion holes (21) on the side of the front connecting plate (1) and the rear connecting plate (2) that are off from the central shaft (3). A shear pin (6) is inserted into the socket (21), and the shear pin (6) has a break groove (61) at the junction of the front connecting plate (1) and the rear connecting plate (2). The front connecting plate (1) or the rear connecting plate (2) has a limiting hole (22) on its outer diameter, and the limiting hole (22) is provided with a positioning mechanism for elastically fixing the shear pin (6).

2. The snowplow safety shear pin device according to claim 1, characterized in that, The front connecting plate (1) has a columnar boss (11) on one side corresponding to the rear connecting plate (2). The central shaft (3) is arranged through the axis of the columnar boss (11). The columnar boss (11) is inserted into the rear connecting plate (2). A bearing (4) is provided between the rear connecting plate (2) and the columnar boss (11).

3. A snowplow safety shear pin device according to claim 2, characterized in that, The front connecting plate (1) has a groove (12) on the side of the shaft away from the rear connecting plate (2), and a thrust bearing (10) is provided in the groove (12) opposite to the end nut of the central shaft (3).

4. A snowplow safety shear pin device according to claim 2, characterized in that, The rear connecting plate (2) has a partition ring (23) inside the shaft hole. The partition ring (23) divides the shaft hole of the rear connecting plate (2) into a bearing groove (24) and a pressure plate groove (25). The outer ring of the bearing (4) is fixed in the bearing groove (24).

5. A snowplow safety shear pin device according to claim 4, characterized in that, The pressure plate groove (25) is provided with a pressure plate (5), which is fixedly connected to the central shaft (3).

6. A snowplow safety shear pin device according to claim 1, characterized in that, The length of the shear pin (6) is the same as the depth of the insertion hole (21) on the front connecting plate (1) and the rear connecting plate (2).

7. A snowplow safety shear pin device according to claim 6, characterized in that, The cross-sectional diameter of the groove (61) is smaller than the diameter of the shear pin (6). The bottom of the groove (61) is the cross-section, and the bottom of the groove (61) is provided with a breakable hook (62) in the circumferential direction.

8. A snowplow safety shear pin device according to claim 1, characterized in that, The positioning mechanism includes a steel ball (7), a compression spring (8), and a set screw (9) arranged sequentially in the limiting hole (22). The set screw (9) is connected to the limiting hole (22) by means of a thread. Under the action of the compression spring (8), the steel ball (7) is pressed tightly against the shear pin (6).

9. A snowplow safety shear pin device according to claim 8, characterized in that, The bottom diameter of the limiting hole (22) is smaller than the diameter of the steel ball (7).

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