A permanent magnet direct drive impact-resistant sand making machine

Abstract

This invention relates to a permanent magnet direct drive impact-resistant sand making machine, comprising a lower body, a permanent magnet direct drive motor, an impact-resistant device, a rotor assembly, an upper body, a discharge device, a crushing chamber structure, a peripheral guard plate assembly, a motor buffer device, and a cooling circulation system. The permanent magnet direct drive motor is installed in the lower body, the crushing chamber structure is fixed to the upper part of the lower body, the upper body is installed on the crushing chamber structure, the peripheral guard plate assembly is fixed to the inner wall of the crushing chamber structure, the discharge device is installed at the feed inlet of the upper body, the permanent magnet direct drive motor is fixed to the lower body through the motor buffer device, the rotor assembly is installed on the lower body and connected to the permanent magnet direct drive motor through the impact-resistant device, the permanent magnet direct drive motor is provided with a motor cooling channel, the impact-resistant device is provided with an impact-resistant device cooling channel, the motor cooling channel and the impact-resistant device cooling channel are connected to the cooling circulation system, which can better improve the impact resistance of the sand making machine during the crushing process and extend the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of sand making machine technology, specifically to a permanent magnet direct drive impact-resistant sand making machine. Background Technology

[0002] A sand making machine is a device used to crush large materials into sand particles. It is widely used in medium and fine crushing of various hard and brittle materials such as rocks, abrasives, and refractory materials. After being accelerated by the rotor, the material collides and is crushed in the crushing chamber, breaking large pieces into fine particles. Currently, sand making machines typically use a motor-belt-shaft connection method. Belt drives have low transmission efficiency and a large structural size. Furthermore, the material passing through the rotor generates a strong impact on the device, affecting its lifespan and stability.

[0003] Chinese patent CN 104588187 B discloses a direct-drive sand making machine, employing a coaxial direct-drive structure between the impeller and motor, which boasts advantages such as high transmission efficiency and long service life. However, the direct connection between the impeller and motor results in weak resistance to material impact, and the impact of material during crushing can severely affect the safe operation of the motor. Chinese patent CN 217888097 U discloses an impact-resistant sand making machine's grinding chamber wall, improving the sand making machine's impact resistance by installing friction blocks. However, it still cannot solve the impact caused by the collision between material and the rotor. Summary of the Invention

[0004] To overcome the above-mentioned shortcomings of the prior art, the present invention provides a permanent magnet direct drive impact-resistant sand making machine.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A permanent magnet direct-drive impact-resistant sand making machine includes a lower body, a permanent magnet direct-drive motor, an impact-resistant device, a rotor assembly, an upper body, a discharge device, a crushing chamber structure, a peripheral guard plate assembly, a motor buffer device, and a cooling circulation system. The permanent magnet direct-drive motor is installed in the lower body, and the crushing chamber structure is correspondingly fixed to the upper part of the lower body. The upper body is installed on the crushing chamber structure and corresponds to the lower body. The peripheral guard plate assembly is fixed to the inner wall of the crushing chamber structure. The discharge device is installed at the feed inlet of the upper body. The permanent magnet direct-drive motor is fixed to the lower body via the motor buffer device. The rotor assembly is installed on the lower body and connected to the permanent magnet direct-drive motor via the impact-resistant device. The permanent magnet direct-drive motor has a motor cooling channel, and the impact-resistant device has an impact-resistant device cooling channel. The motor cooling channel and the impact-resistant device cooling channel are connected to the cooling circulation system. The impact-resistant device includes a friction disc and a mating disc connected to each other. The friction disc is threadedly connected to the main shaft of the permanent magnet direct-drive motor, and the mating disc is connected to the shaft of the rotor assembly. The friction disc and the mating disc are connected by threads. The connecting surfaces of the friction disc and the mating disc are respectively provided with several damping spring grooves, and damping springs are installed in the damping spring grooves. The friction disc is provided with a sealing boss, an oil sealing groove I arranged inside and outside the sealing boss, and a friction pair. The mating disc is provided with a sealing groove corresponding to the sealing boss, an oil sealing groove II corresponding to oil sealing groove I, and a mating pair corresponding to the friction disc. Hydraulic oil is provided in oil sealing groove I and oil sealing groove II and sealed by oil seals. The sealing boss and the sealing groove are connected by... The friction pair consists of a friction disk with a radial clearance of less than 0.5 mm, and the height of the sealing boss is greater than the depth of the sealing groove. The friction pair consists of several sets of annular bosses evenly distributed radially along the friction disk. The mating pair consists of several sets of annular bosses evenly distributed radially along the mating disk and interspersed with the annular bosses of the friction pair. A gap cavity is formed between the friction pair and the mating pair. The gap cavity is filled with hydraulic oil. The mating disk is provided with an anti-impact device oil port that communicates with the gap cavity. The cooling channel of the anti-impact device is located inside the friction disk.

[0007] Preferably, the friction disc is provided with a friction disc fixing hole, and the mating disc is provided with a mating disc fixing hole corresponding to the friction disc fixing hole. The friction disc fixing hole and the mating disc fixing hole are fixed by bolts, and the shock-absorbing spring is in a compressed state when fixed.

[0008] Preferably, 6-10 sets of the friction disk fixing holes and the mating disk fixing holes are evenly distributed along the circumference of the friction disk.

[0009] Preferably, the damping spring groove includes a damping spring groove one evenly distributed along the circumference of the friction disk on the friction disk, and a damping spring groove two corresponding to the damping spring groove one disposed on the mating disk.

[0010] Preferably, the damping spring grooves are evenly distributed in 4-8 groups along the circumference of the friction disc.

[0011] Preferably, the friction pair consists of 3-5 sets of annular bosses evenly distributed radially along the friction disk, and the number of annular bosses in the paired pair is the same as the number of annular bosses in the friction pair and they are arranged alternately.

[0012] Preferably, the radial gap between the staggered annular bosses and the gap between the end face of the annular boss and the inner end face of the corresponding friction disk and the mating disk are both 0.5-1.5mm.

[0013] Preferably, the friction disc is provided with a friction disc connecting threaded hole that is threaded to the main shaft, and the mating disc is provided with a mating disc connecting threaded hole that is threaded to the rotor assembly shaft.

[0014] Preferably, a sealing cap is installed inside the oil port of the impact-resistant device.

[0015] Preferably, the sealing cap is threadedly connected to the oil port of the impact-resistant device.

[0016] Beneficial effects:

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The rotor assembly of the present invention is coaxially and directly driven with a permanent magnet direct drive motor through an anti-impact device, which can reduce the space occupied by the equipment and improve the efficiency of the equipment.

[0019] 2. The present invention is equipped with an anti-impact device. The shock-absorbing springs arranged between the friction disc and the mating disc, as well as the hydraulic oil in the axial and radial gaps, can better improve the impact resistance of the sand making machine during the crushing process and better extend the service life of the equipment.

[0020] 3. The rotor assembly of the present invention is not directly connected to the permanent magnet direct drive motor, which can reduce the impact of material impact on the motor during crushing. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of a permanent magnet direct drive impact-resistant sand making machine provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a permanent magnet direct drive motor provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the impact-resistant device provided in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the friction disk provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the dual disk provided in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Lower body; 2. Permanent magnet direct drive motor; 2-1. Lower cover plate; 2-2. Housing; 2-3. Stator winding; 2-4. Motor cooling channel; 2-5. Liquid inlet; 2-6. Main shaft; 2-7. Upper cover plate; 2-8. Motor seal; 2-9. Motor mounting base; 2-10. Rotor core; 2-11. Permanent magnet; 2-12. Bearing; 3. Impact-resistant device; 3-1. Friction disc; 3-1-1. Impact-resistant device cooling channel; 3-1-2. Sealing boss; 3-1-3. Friction pair; 3-1-4. Oil seal groove one; 3-1-5. Shock-absorbing spring groove one; 3-1-6. 3-1-7 Friction disc connecting threaded hole; 3-2 Friction disc fixing hole; 3-2-1 Anti-impact device oil port; 3-2-2 Sealing groove; 3-2-3 Dual pair; 3-2-4 Oil seal groove two; 3-2-5 Shock-absorbing spring groove two; 3-2-6 Dual disc connecting threaded hole; 3-2-7 Dual disc fixing hole; 3-3 Shock-absorbing spring; 3-4 Oil seal; 3-5 Hydraulic oil; 3-6 Bolt; 4 Rotor assembly; 5 Upper body; 6 Unloading device; 7 Crushing chamber; 8 Peripheral guard plate assembly; 9 Motor buffer device; 10 Cooling circulation system. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0030] Example 1:

[0031] See Figure 1-5This embodiment provides a permanent magnet direct drive impact crushing machine, including a lower body 1, a permanent magnet direct drive motor 2, an impact-resistant device 3, a rotor assembly 4, an upper body 5, a discharge device 6, a crushing chamber structure 7, a peripheral guard plate assembly 8, a motor buffer device 9, and a cooling circulation system 10. The permanent magnet direct drive motor 2 is installed inside the lower body 1. The crushing chamber structure 7 is correspondingly fixed to the upper part of the lower body 1. The upper body 5 is installed on the crushing chamber structure 7 and corresponds to the lower body 1. The peripheral guard plate assembly 8 is fixed to the inner wall of the crushing chamber of the crushing chamber structure 7. The discharge device 6 is installed at the feed inlet of the upper body. The permanent magnet direct drive motor 2 is fixed to the lower body 1 through the motor buffer device 9. The rotor assembly 4 is installed on the lower body 1 and is connected to the lower body 1 through the impact-resistant device 3. The device is connected to a permanent magnet direct drive motor 2, which has a motor cooling channel 2-4. The anti-impact device 3 has an anti-impact device cooling channel 3-1-1. The motor cooling channel 2-4 and the anti-impact device cooling channel 3-1-1 are connected to the cooling circulation system 10. The anti-impact device 3 includes a friction disc 3-1 and a mating disc 3-2 connected to each other. The friction disc 3-1 is threaded to the main shaft 206 of the permanent magnet direct drive motor 2, and the mating disc 3-2 is threaded to the shaft of the rotor assembly 4. The connecting surfaces of the friction disc 3-1 and the mating disc 3-2 are correspondingly provided with several damping spring grooves, and damping springs 3-3 are installed in the damping spring grooves. The friction disc 3-1 has a sealing boss 3-1. -2. Oil sealing groove 3-1-4 and friction pair 3-1-3 are arranged inside and outside the sealing boss 3-1-2. The mating disk 3-2 is provided with sealing groove 3-2-2 corresponding to the sealing boss 3-1-2, oil sealing groove 3-2-4 corresponding to oil sealing groove 3-1-4, and mating pair 3-2-3 corresponding to friction disk 3-1. Hydraulic oil 3-5 is provided in oil sealing groove 3-1-4 and oil sealing groove 3-2-4 and sealed by oil seal 3-4. The sealing boss 3-1-2 and sealing groove 3-2-2 are clearance-fitted with a radial clearance of less than 0.5mm. The height of the sealing boss 3-1-2 is greater than the depth of the sealing groove 3-2-2. The friction pair 3-1-3 is along the friction disk. 3-1 A plurality of circular annular bosses are radially evenly distributed. The mating pair 3-2-3 consists of a plurality of circular annular bosses radially evenly distributed along the mating disk 3-2 and arranged alternately with the circular annular bosses of the friction pair 3-1-3. A gap cavity is formed between the friction pair 3-1-3 and the mating pair 3-2-3. The gap cavity is filled with hydraulic oil 3-5. The mating disk 3-2 is provided with an anti-impact device oil port 3-2-1 that communicates with the gap cavity. The anti-impact device cooling channel 3-1-1 is provided inside the friction disk 3-1. A sealing cover is installed inside the anti-impact device oil port 3-2-1. The sealing cover is threadedly connected to the anti-impact device oil port 3-2-1. The sealing cover adopts an existing product or structure known to those skilled in the art.

[0032] The permanent magnet direct drive motor 2 in this embodiment includes a lower cover plate 2-1, a housing 2-2, a stator winding 2-3, a motor cooling channel 2-4, a liquid inlet 2-5, a main shaft 2-6, an upper cover plate 2-7, a motor seal 2-8, a motor mounting base 2-9, a rotor core 2-10, a permanent magnet 2-11, and a bearing 2-12. -8, motor mounting base 2-9, rotor core 2-10, permanent magnet 2-11, and bearing 2-12 all adopt existing structures well known to those skilled in the art, and their connection relationships also adopt existing connection methods well known to those skilled in the art, which will not be described in detail here. The motor cooling channel 2-4 is set inside the housing 2-2, and the housing 2-2 is provided with a liquid inlet hole 2-5 that connects to the motor cooling channel 2-4. The liquid inlet hole 2-5 is connected to the cooling circulation system 10.

[0033] The cooling circulation system 10 of this embodiment adopts existing products or structures known to those skilled in the art, and its connection with the motor cooling channel 2-4 and the impact-resistant device cooling channel 3-1-1 also adopts existing connection methods known to those skilled in the art.

[0034] The motor buffer device 9 in this embodiment adopts a conventional structure known to those skilled in the art, and its connection with the motor mounting base 2-9 adopts a conventional connection method known to those skilled in the art, which will not be described in detail here.

[0035] The friction disk 3-1 is provided with a friction disk fixing hole 3-1-7, and the dual disk 3-2 is provided with a dual disk fixing hole 3-2-7 corresponding to the friction disk fixing hole 3-1-7. The friction disk fixing hole 3-1-7 and the dual disk fixing hole 3-2-7 are fixed by bolts 3-6, and the shock-absorbing spring 3-3 is in a compressed state when fixed. The friction disk fixing hole 3-1-7 and the dual disk fixing hole 3-2-7 are evenly distributed in 6-10 sets along the circumference of the friction disk 3-1.

[0036] The damping spring grooves include damping spring groove 3-1-5 evenly distributed along the circumference of the friction disk 3-1, and damping spring groove 3-2-5 corresponding to damping spring groove 3-1-5 on the mating disk 3-2. The damping spring grooves are evenly distributed in 4-8 sets along the circumference of the friction disk 3-1. The friction pair 3-1-3 consists of 3-5 sets of annular bosses evenly distributed radially along the friction disk 3-1. The annular bosses of the mating pair 3-2-3... The number of the ring-shaped bosses is the same as the number of the friction pair 3-1-3 and they are staggered. The radial gap between the staggered ring-shaped bosses and the gap between the end face of the ring-shaped boss and the inner end face of the corresponding friction disk 3-1 and the mating disk 3-2 are both 0.5-1.5mm. The friction disk 3-1 is provided with a friction disk connecting threaded hole 3-1-6 that is threaded to the main shaft 206, and the mating disk 3-2 is provided with a mating disk connecting threaded hole 3-2-6 that is threaded to the rotor assembly 4 shaft.

[0037] This embodiment includes the following components: lower body 1, permanent magnet direct drive motor 2, lower cover plate 2-1, housing 2-2, stator winding 2-3, motor cooling channel 2-4, liquid inlet 2-5, main shaft 2-6, upper cover plate 2-7, motor seal 2-8, motor mounting base 2-9, rotor core 2-10, permanent magnet 2-11, bearing 2-12, anti-impact device 3, friction disc 3-1, anti-impact device cooling channel 3-1-1, sealing boss 3-1-2, friction pair 3-1-3, oil seal groove 3-1-4, shock absorber spring groove 3-1-5, friction disc connecting threaded hole 3-1-6, friction disc fixing hole 3-1-7, and mating disc 3. -2. Impact-resistant device oil port 3-2-1, sealing groove 3-2-2, mating pair 3-2-3, oil seal groove II 3-2-4, shock-absorbing spring groove II 3-2-5, mating disc connecting threaded hole 3-2-6, mating disc fixing hole 3-2-7, shock-absorbing spring 3-3, oil seal 3-4, hydraulic oil 3-5, bolt 3-6, rotor assembly 4, upper body 5, unloading device 6, crushing chamber structure 7, peripheral guard plate assembly 8, motor buffer device 9, cooling circulation system 10. Adopt existing products or structures known to those skilled in the art, and the connection methods between them also adopt existing connection methods known to those skilled in the art.

[0038] In this embodiment, the rotor assembly 4 is coaxially and directly driven to the permanent magnet direct drive motor 2 via the anti-impact device 3, which reduces the equipment's footprint and improves its efficiency. The shock-absorbing spring 3-3 arranged between the friction disc 3-1 and the mating disc 3-2, the hydraulic oil 3-5 in the axial and radial clearances, and the motor buffer device 9 work together to form a better-performing anti-impact structure, improving the sand making machine's impact resistance during the crushing process.

[0039] During installation, the permanent magnet direct drive motor 2 is fixedly connected to the lower body 1 via the motor buffer device 9, and the crushing chamber structure 7 and rotor assembly 4 are fixed to the lower body 1. The friction disc 3-1 of the impact-resistant device 3 is threadedly connected to the main shaft 2-6 of the permanent magnet direct drive motor 2, and the mating disc 3-2 is threadedly connected to the rotor assembly 4. An oil seal 3-4 is placed in the oil seal groove 3-1-4 of the inner and outer rings of the sealing boss 3-1-2 of the friction disc 3-1, and a shock-absorbing spring 3-3 is placed in the shock-absorbing spring groove 3-1-5. The friction disc 3-1 and the mating disc 3-2 are fixedly connected via the friction disc fixing hole 3-1-7, the mating disc fixing hole 3-2-7, and bolts 3-6. Finally, the axial and radial clearances between the friction disc 3-1 and the mating disc 3-2 are filled with hydraulic oil 3-5 through the oil port 3-2-1 of the impact-resistant device. The axial and radial clearances between the friction disc 3-1 and the mating disc 3-2 are adjusted using the shock-absorbing spring 3-3 and bolts 3-6.

[0040] When the sand making machine is working, the impact-resistant device 3 can realize the direct drive connection between the rotor and the permanent magnet direct drive motor 2. The shock-absorbing spring 3-3 arranged between the friction disc 3-1 and the mating disc 3-2, the hydraulic oil 3-5 in the axial and radial gaps, and the motor buffer device 9 can buffer the impact of particles. The cooling circulation system 10 can cool the hydraulic oil and the motor, which can better improve the service life of the equipment.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A permanent magnet direct-drive impact crushing machine, characterized in that: The system includes a lower body (1), a permanent magnet direct drive motor (2), an impact-resistant device (3), a rotor assembly (4), an upper body (5), a discharge device (6), a crushing chamber structure (7), a peripheral guard plate assembly (8), a motor buffer device (9), and a cooling circulation system (10). The permanent magnet direct drive motor (2) is installed inside the lower body (1). The crushing chamber structure (7) is fixed to the upper part of the lower body (1). The upper body (5) is installed on the crushing chamber structure (7) and corresponds to the lower body (1). The peripheral guard plate assembly (8) is fixed to the inner wall of the crushing chamber of the crushing chamber structure (7). The discharge device... The device (6) is installed at the feed inlet of the upper body. The permanent magnet direct drive motor (2) is fixed to the lower body (1) through the motor buffer device (9). The rotor assembly (4) is installed on the lower body (1) and connected to the permanent magnet direct drive motor (2) through the anti-impact device (3). The permanent magnet direct drive motor (2) is provided with a motor cooling channel (2-4). The anti-impact device (3) is provided with an anti-impact device cooling channel (3-1-1). The motor cooling channel (2-4) and the anti-impact device cooling channel (3-1-1) are connected to the cooling circulation system (10). The anti-impact device... (3) Includes a friction disc (3-1) and a mating disc (3-2) connected to each other. The friction disc (3-1) is threadedly connected to the main shaft (206) of the permanent magnet direct drive motor (2), and the mating disc (3-2) is threadedly connected to the shaft of the rotor assembly (4). The connecting surfaces of the friction disc (3-1) and the mating disc (3-2) are respectively provided with several damping spring grooves. Damping springs (3-3) are installed in the damping spring grooves. The friction disc (3-1) is provided with a sealing boss (3-1-2) and oil sealing grooves (3-1-2) arranged inside and outside the sealing boss (3-1-2). 4) Friction pair (3-1-3): The mating disc (3-2) is provided with a sealing groove (3-2-2) corresponding to the sealing boss (3-1-2), an oil sealing groove two (3-2-4) corresponding to the first oil sealing groove (3-1-4), and a mating pair (3-2-3) corresponding to the friction disc (3-1). Hydraulic oil (3-5) is provided in the first oil sealing groove (3-1-4) and the second oil sealing groove (3-2-4) and is sealed by the oil seal (3-4). The sealing boss (3-1-2) and the sealing groove (3-2-2) are clearance-fitted and the radial clearance is less than 0.The sealing boss (3-1-2) is 5mm high, and its height is greater than the depth of the sealing groove (3-2-2). The friction pair (3-1-3) consists of several sets of annular bosses evenly distributed radially along the friction disk (3-1). The mating pair (3-2-3) consists of several sets of annular bosses evenly distributed radially along the mating disk (3-2) and staggered with the annular bosses of the friction pair (3-1-3). A gap cavity is formed between the friction pair (3-1-3) and the mating pair (3-2-3), and the gap cavity is filled with hydraulic oil (3-5). The mating disk (3-2) is provided with an anti-impact device oil port (3-2-1) communicating with the gap cavity. The anti-impact device cooling channel (3-1-1) is located inside the friction disk (3-1).

2. The permanent magnet direct-drive impact crushing machine according to claim 1, characterized in that: The friction disk (3-1) is provided with a friction disk fixing hole (3-1-7), and the mating disk (3-2) is provided with a mating disk fixing hole (3-2-7) corresponding to the friction disk fixing hole (3-1-7). The friction disk fixing hole (3-1-7) and the mating disk fixing hole (3-2-7) are fixed by bolts (3-6), and the shock-absorbing spring (3-3) is in a compressed state when fixed.

3. A permanent magnet direct-drive impact crushing machine according to claim 2, characterized in that: The friction disk fixing holes (3-1-7) and the mating disk fixing holes (3-2-7) are evenly distributed in 6-10 sets along the circumferential direction of the friction disk (3-1).

4. The permanent magnet direct-drive impact crushing machine according to claim 1, characterized in that: The damping spring groove includes a damping spring groove one (3-1-5) evenly distributed along the circumference of the friction disk (3-1) and a damping spring groove two (3-2-5) corresponding to the damping spring groove one (3-1-5) and disposed on the mating disk (3-2).

5. A permanent magnet direct-drive impact crushing machine according to claim 4, characterized in that: The damping spring grooves are evenly distributed in 4-8 groups along the circumference of the friction disc (3-1).

6. A permanent magnet direct-drive impact crushing machine according to claim 1, characterized in that: The friction pair (3-1-3) consists of 3-5 sets of annular bosses evenly distributed radially along the friction disk (3-1). The number of annular bosses in the dual pair (3-2-3) is the same as the number of annular bosses in the friction pair (3-1-3) and they are arranged alternately.

7. A permanent magnet direct-drive impact crushing machine according to claim 6, characterized in that: The radial clearance between the staggered annular bosses and the clearance between the end face of the annular boss and the inner end face of the corresponding friction disk (3-1) and the mating disk (3-2) are both 0.5-1.5mm.

8. A permanent magnet direct-drive impact crushing machine according to claim 1, characterized in that: The friction disc (3-1) is provided with a friction disc connection threaded hole (3-1-6) that is threaded to the main shaft (206), and the mating disc (3-2) is provided with a mating disc connection threaded hole (3-2-6) that is threaded to the rotor assembly (4) shaft.

9. A permanent magnet direct-drive impact crushing machine according to claim 1, characterized in that: A sealing cap is installed inside the oil port (3-2-1) of the impact-resistant device.

10. A permanent magnet direct-drive impact crushing machine according to claim 9, characterized in that: The sealing cap is threadedly connected to the oil port (3-2-1) of the impact-resistant device.

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