A rake blade structure for a rake dryer

Abstract

This utility model relates to the field of rake dryer technology, and in particular to a rake blade structure for a rake dryer, which overcomes the shortcomings of the prior art. It includes a rake arm and rake teeth. The rake arm includes a fixed rake arm and a telescopic rake arm. A connecting column is installed on one end of the fixed rake arm, and the telescopic rake arm slides between the inner walls of the other end of the fixed rake arm. An output shaft is rotatably arranged inside the fixed rake arm, and a drive motor is connected to one end of the output shaft. The rake teeth are arranged on one end wall of the telescopic rake arm, and the rake teeth can rotate synchronously with the rotation of the output shaft. Compared with the prior art, this utility model effectively improves the adjustability of the rake blade structure.

Description

Technical Field

[0001] This utility model relates to the field of rake dryer technology, specifically a rake blade structure for a rake dryer. Background Technology

[0002] Rake dryers are widely used drying equipment in industries such as chemical, pharmaceutical, and food processing. They are mainly used for heating and drying pastes, porridges, or powders. The core component, the rake blades, plays a crucial role in stirring, turning, and propelling the material during the drying process, directly affecting drying efficiency and product quality.

[0003] Chinese utility model patent CN220355950U discloses an adjustable rake dryer. This technical solution incorporates an adjustable rake blade structure within the dryer. The adjustable screw within this structure, connected to a transmission mechanism, allows for adjustment of the contact depth between the rake blades and the material. This design enables adjustment of the contact depth based on the material density during operation, reducing the torque during start-up and extending the dryer's lifespan. This solves the problem of non-adjustable rake blade contact depth. However, this external adjustment mechanism, installed within the dryer, may cause excessive damage due to constant impact and collisions from the material. Furthermore, damp materials can easily adhere to these adjustment mechanisms, affecting their effectiveness.

[0004] Therefore, we propose a rake blade structure for a rake dryer to address the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a rake blade structure for a rake dryer to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rake blade structure for a rake dryer includes a rake arm and rake teeth. The rake arm includes a fixed rake arm and a telescopic rake arm. A connecting column is installed on one end of the fixed rake arm. The telescopic rake arm slides between the inner walls of the other end of the fixed rake arm. An output shaft is rotatably arranged inside the fixed rake arm. A drive motor is connected to one end of the output shaft. The rake teeth are arranged on the end wall of one end of the telescopic rake arm, and the rake teeth can rotate and adjust synchronously with the rotation of the output shaft.

[0008] According to the above technical solution, the fixed rake arm has an inner cavity with an opening at one end facing the rake teeth. Dovetail-shaped guide grooves are provided on the opposite inner walls of the inner cavity on both sides. Dovetail-shaped guide bars are fixedly installed on the opposite side walls of the telescopic rake arm on both sides, and the guide bars slide between the inner walls of the guide grooves.

[0009] According to the above technical solution, limit blocks are provided on the inner walls of the opposite sides of the inner cavity, and contact sensors are embedded on the side walls of the limit blocks facing the telescopic rake arm.

[0010] According to the above technical solution, the drive motor is fixedly installed on the inner wall of the inner cavity near the connecting column. The output shaft is provided with a threaded part. A key shaft is slidably arranged between the inner walls of the output shaft. One end of the key shaft is always located inside the output shaft, and the other end of the key shaft is connected and fixed to the end wall of the rake teeth. A rotating block is also provided on the end wall of the rake teeth facing the telescopic rake arm. The rotating block always rotates between the inner walls of the telescopic rake arm.

[0011] According to the above technical solution, an inner cylinder is fixedly installed between the inner walls of the telescopic rake arm. A through hole with a circular cross-section is opened in the middle of the inner cylinder, and a silicon steel sheet is fixedly embedded on the inner surface of the inner cylinder. A cylindrical adjusting block is slidably installed between the inner walls of the through hole. The output shaft passes through the adjusting block, and the adjusting block slides on the threaded part in a threaded transmission manner.

[0012] According to the above technical solution, a control power supply is also built into the inner wall of the telescopic rake arm. The control power supply is connected to the silicon steel sheet on the inner cylinder through a wire and is energized. The adjusting block and the silicon steel sheet can be connected as one unit by suction.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0014] By setting up a structure including a fixed rake arm, a telescopic rake arm, rake teeth, an output shaft, a key shaft, an internal cylinder, and an adjusting block, the connection state between the adjusting block and the telescopic rake arm can be achieved by utilizing the attraction between the internal cylinder and the adjusting block. When the two are connected as one, the length of the rake arm can be adjusted through the threaded drive between the threaded part on the output shaft and the adjusting block. When the two are not connected as one, the angle of the rake teeth can be adjusted by rotating the output shaft, effectively improving the adjustability of the rake blade structure. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] In the diagram: 1. Fixed rake arm; 11. Connecting column; 12. Inner cavity; 13. Guide groove; 14. Limiting block; 2. Telescopic rake arm; 21. Guide bar; 22. Control power supply; 3. Rake teeth; 31. Rotating block; 4. Drive motor; 41. Output shaft; 411. Threaded part; 412. Key shaft; 5. Internal cylinder; 6. Adjusting block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-2 The present invention provides the following technical solution:

[0020] A rake blade structure for a rake dryer includes a rake arm and rake teeth 3. The rake arm includes a fixed rake arm 1 and a telescopic rake arm 2. A connecting post 11 is welded to one end of the fixed rake arm 1. The telescopic rake arm 2 slides between the inner walls of the other end of the fixed rake arm 1. An output shaft 41 is rotatably arranged inside the fixed rake arm 1. A drive motor 4 (a rotary motor) is connected to one end of the output shaft 41. The rake teeth 3 are arranged on one end wall of the telescopic rake arm 2, and the rake teeth 3 can rotate synchronously with the rotation of the output shaft 41.

[0021] The fixed rake arm 1 has an inner cavity 12, which is open at one end facing the rake teeth 3. Dovetail-shaped guide grooves 13 are provided on the inner walls of the two opposite sides of the inner cavity 12. Dovetail-shaped guide bars 21 are fixedly installed on the side walls of the telescopic rake arm 2. The guide bars 21 slide between the inner walls of the guide grooves 13. Limiting blocks 14 are provided on the inner walls of the two opposite sides of the inner cavity 12. Contact sensors are embedded in the side walls of the limiting blocks 14 facing the telescopic rake arm 2.

[0022] It should be further explained that the moving position of the telescopic rake arm 2 is limited by the setting of the limit block 14. When the end wall of the telescopic rake arm 2 moves to contact the limit block 14, the contact sensor on it is triggered. At this time, the total length of the telescopic rake arm 2 and the fixed rake arm 1 is the shortest, and the drive motor 4 also stops.

[0023] The drive motor 4 is fixedly installed on the inner wall of the inner cavity 12 near the connecting column 11. The output shaft 41 has a threaded part 411. A key shaft 412 is slidably arranged between the inner walls of the output shaft 41. One end of the key shaft 412 is always located inside the output shaft 41, and the other end of the key shaft 412 is connected and fixed to the end wall of the rake tooth 3. A rotating block 31 with a "T" structure is also fixedly connected to the end wall of the rake tooth 3 facing the telescopic rake arm 2. The rotating block 31 always rotates between the end inner walls of the telescopic rake arm 2.

[0024] It should be further explained that when the drive motor 4 starts, it drives the output shaft 41 to rotate. Due to the setting of the key shaft 412, the rake teeth 3 can always rotate synchronously with the output shaft 41 under the drive of the key shaft 412 during the movement and adjustment of the telescopic rake arm 2. At the same time, the rake teeth 3 can also adjust their position synchronously with the adjustment of the telescopic rake arm 2.

[0025] An inner cylinder 5 is fixedly installed between the inner walls of the telescopic rake arm 2. A circular through hole is opened in the middle of the inner cylinder 5, and a silicon steel sheet is fixedly embedded on the inner surface of the inner cylinder 5. A cylindrical adjusting block 6 is slidably installed between the inner walls of the through hole. The output shaft 41 passes through the adjusting block 6, and the adjusting block 6 slides on the threaded part 411 by means of threaded transmission. A control power supply 22 is also built into the inner walls of the telescopic rake arm 2. The control power supply 22 is connected to the silicon steel sheet on the inner cylinder 5 through a wire and is energized. The adjusting block 6 and the silicon steel sheet can be connected as one unit by suction.

[0026] It should be further explained that the connection between the adjusting block 6 and the telescopic rake arm 2 is controlled by the suction force generated by the silicon steel sheet after it is powered on. When the two are connected as one, the threaded part 411 rotates synchronously with the rotation of the output shaft 41, and then the telescopic rake arm 2 slides along the inner wall of the fixed rake arm 1 under the action of the thread drive. When the two are not connected as one, there is a rotational contact between the adjusting block 6 and the inner cylinder 5. At this time, the adjusting block 6 will rotate synchronously with the rotation of the output shaft 41, thereby realizing the angle adjustment process of the rake teeth 3.

[0027] It should be noted that both the contact sensor and the drive motor 4 are connected to the main control system of the rake dryer via electrical signals.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A rake blade structure for a rake dryer, comprising rake arms and rake teeth (3), characterized in that, The rake arm includes a fixed rake arm (1) and a telescopic rake arm (2). A connecting column (11) is installed on one end of the fixed rake arm (1). The telescopic rake arm (2) slides between the inner walls of the other end of the fixed rake arm (1). An output shaft (41) is rotatably arranged inside the fixed rake arm (1). A drive motor (4) is connected to one end of the output shaft (41). Rake teeth (3) are arranged on one end wall of the telescopic rake arm (2). The rake teeth (3) can rotate synchronously with the rotation of the output shaft (41).

2. A rake structure for a rake dryer according to claim 1, characterized in that The fixed rake arm (1) has an inner cavity (12) with an opening at one end facing the rake teeth (3). The inner cavity (12) has dovetail-shaped guide grooves (13) on both sides of the inner wall. Dovetail-shaped guide bars (21) are fixedly installed on both sides of the telescopic rake arm (2). The guide bars (21) slide between the inner walls of the guide grooves (13).

3. A rake structure for a rake dryer according to claim 2, characterized in that Limiting blocks (14) are provided on the inner walls of the two opposite sides of the inner cavity (12), and contact sensors are embedded on the side wall of the limiting blocks (14) facing the telescopic rake arm (2).

4. A rake structure for a rake dryer according to claim 3, characterised in that The drive motor (4) is fixedly installed in the inner wall of the inner cavity (12) near the connecting column (11). The output shaft (41) has a threaded part (411). A key shaft (412) is slidably arranged between the inner walls of the output shaft (41). One end of the key shaft (412) is always located inside the output shaft (41), and the other end of the key shaft (412) is connected and fixed to the end wall of the rake tooth (3). A rotating block (31) is also provided on the end wall of the rake tooth (3) facing the telescopic rake arm (2). The rotating block (31) always rotates between the inner walls of the telescopic rake arm (2).

5. A rake structure for a rake dryer according to claim 4, characterised in that An inner cylinder (5) is fixedly installed between the inner walls of the telescopic rake arm (2). A through hole with a circular cross-section is opened in the middle of the inner cylinder (5), and a silicon steel sheet is fixedly embedded on the inner surface of the inner cylinder (5). A cylindrical adjusting block (6) is slidably installed between the inner walls of the through hole. The output shaft (41) passes through the adjusting block (6), and the adjusting block (6) slides on the threaded part (411) in a threaded transmission manner.

6. A rake structure for a rake dryer according to claim 5, characterised in that The telescopic rake arm (2) also has a built-in control power supply (22) between its inner walls. The control power supply (22) is connected to the silicon steel sheet on the built-in cylinder (5) by a wire and is powered on. The adjusting block (6) and the silicon steel sheet can be connected together by suction.

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