Grinding machine with dust collection device

Abstract

The utility model relates to a polisher with a dust collection device, which comprises a polishing disc, a head shell assembly, a driving mechanism and the dust collection device, a transmission mechanism is arranged in the head shell assembly, the polisher further comprises a machine shell arranged on the polishing disc, one end of the machine shell is provided with a through hole and is connected with the head shell assembly, and a mounting cavity and an air cavity are arranged in the machine shell. The dust suction device comprises dust suction fan blades, the driving mechanism comprises a motor and an output shaft, the motor is installed in the installation cavity, one end of the output shaft is connected with the motor, the dust suction fan blades are contained in the air cavity and arranged on the output shaft in a penetrating and sleeving mode, and the other end of the output shaft is arranged in the air cavity in a penetrating mode, penetrates out of a penetrating hole in the machine shell and is in transmission connection with the transmission mechanism. An air outlet communicated with the air cavity is formed in the upper end of the machine shell, a dust collection channel is formed in the grinding disc, and an air inlet communicated with the dust collection channel and the air cavity is formed in the bottom of the machine shell. The air cavity and the mounting cavity are designed in the same shell, so that the concentricity of the dust collection fan blade and the output shaft of the motor is ensured, and the dust collection efficiency of the dust collection fan blade is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a grinder with a dust suction device. Background Art

[0002] For example, a new wall grinder with publication number CN206839754U is provided with a motor, a motor shaft, an intermediate shaft, an output shaft, a grinding disc and a grinding cover. The motor shaft is transmission-connected to the intermediate shaft through a bevel gear mechanism, the intermediate shaft is transmission-connected to one end of the output shaft through a first gear mechanism, and the other end of the output shaft passes through the grinding cover and is connected to the grinding disc arranged therein; it also includes a fan blade, a fan blade shaft and a fan blade shell, the fan blade is arranged in the fan blade shell, one end of the fan blade shaft extends into the fan blade shell and is connected to the fan blade, and the other end is transmission-connected to the intermediate shaft through a second gear mechanism, the fan blade shell is provided with an air inlet and an air outlet, the grinding cover is provided with a dust suction hole, the dust suction hole is connected to the air inlet on the fan blade shell through a sleeve structure, the fan blade shaft, the intermediate shaft and the output shaft are arranged in parallel, and the fan blade shaft is located on the side of the intermediate shaft away from the motor, and the output shaft is located on the side of the intermediate shaft close to the motor. The motor of the wall grinder with the above structural design drives the fan blades to rotate through the first gear mechanism and the second gear mechanism. During the transmission process of the multiple transmission structures, when the motor transmits to the fan blades, its rotation speed will be affected, thereby reducing the dust collection efficiency of the fan blades. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide a grinding machine with high dust collection efficiency.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A grinder with a dust suction device comprises a grinding disc, a head shell assembly, a driving mechanism and a dust suction device, wherein the head shell assembly is arranged on the top of the grinding disc, a transmission mechanism is arranged in the head shell assembly, and a casing arranged on the grinding disc, one end of the casing is provided with a through hole and connected to the head shell assembly, an installation cavity and an air cavity are arranged in the casing, the dust suction device comprises a dust suction fan blade and a dust suction hose, the driving mechanism comprises a motor and an output shaft, the motor is installed in the installation cavity, one end of the output shaft is connected to the motor, and the The dust suction blade is accommodated in the wind cavity and is sleeved on the output shaft, the other end of the output shaft is penetrated into the wind cavity and passes through the through hole on the casing and is connected to the transmission mechanism, the upper end of the casing is provided with an air outlet connected to the wind cavity, the grinding disc is provided with a dust suction channel, the bottom of the casing is provided with an air inlet connecting the dust suction channel and the wind cavity, a front fork is rotatably connected to the head shell assembly, one end of the dust suction hose is connected to the air outlet, and the other end of the dust suction hose is clamped and installed by the front fork.

[0006] Furthermore, the casing includes a first half shell and a second half shell divided into halves, and the first half shell and the second half shell surround and form the installation cavity and the wind cavity therein.

[0007] Furthermore, a locking assembly is provided between the head shell assembly and the grinding disc, and the head shell assembly can be detachably connected to the grinding disc through the locking assembly.

[0008] Furthermore, the locking assembly includes a connecting seat fixedly mounted on the grinding disc and a locking member arranged on the head shell assembly, the connecting seat is provided with a locking portion that can be locked with the locking member, and the grinding disc and the head shell assembly are detachably connected together through the locking cooperation between the locking member and the locking portion.

[0009] Furthermore, the locking component includes a locking component body and buckles arranged on both sides of the locking component body, the buckle includes a pressing portion located at the upper end, a connecting portion located in the middle portion and a buckling portion located at the lower end, the connecting portion is rotatably connected to the locking component body through a pin shaft, a torsion spring is mounted on the pin shaft, one end of the torsion spring is connected to the locking component body, and the other end of the torsion spring is connected to the pressing portion, and the buckling portion can be locked with the locking component.

[0010] Furthermore, the transmission mechanism includes a bevel gear, a pinion gear and a large gear, the bevel gear is meshed with the terminal teeth of the output shaft, the bevel gear is connected to a first rotating shaft, the pinion gear is connected to a second rotating shaft, the first rotating shaft is inserted into the second rotating shaft and can rotate synchronously, the large gear is connected to a third rotating shaft, the large gear is rotatably installed in the grinding disc through the third rotating shaft and meshed with the pinion gear.

[0011] Furthermore, a first positioning protrusion and a first positioning cavity are provided at the lower end of the locking body, a second positioning protrusion and a second positioning cavity are provided on the connecting seat, a first shock-absorbing ring is sleeved on the outer periphery of the first positioning protrusion, the first positioning protrusion can be inserted into the second positioning cavity, and the outer periphery of the first shock-absorbing ring abuts against the cavity wall of the second positioning cavity, a first through hole for allowing the first rotating shaft to extend is provided at the center of the first positioning protrusion, a second through hole for allowing the second rotating shaft to pass through is provided in the second positioning cavity, the first rotating shaft passes through the first through hole and is sleeved together with the second rotating shaft from the second through hole, the second positioning protrusion is sleeved on the outer periphery of the second shock-absorbing ring, the second positioning protrusion can be inserted into the first positioning cavity, and the outer periphery of the second shock-absorbing ring abuts against the cavity wall of the first positioning cavity.

[0012] Furthermore, a heat dissipation blade is mounted on the end of the output shaft close to the motor, and the heat dissipation blade is accommodated in the installation cavity.

[0013] Furthermore, the air outlet is located directly above the dust suction blade, and an air guide plate is provided in the air inlet.

[0014] Furthermore, the center lines of the installation cavity, the wind cavity and the through hole are on the same horizontal straight line.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] Firstly, in the utility model, the wind cavity and the installation cavity are designed in the same casing, which can ensure the concentricity of the dust suction blades and the motor output shaft. At the same time, the dust suction blades are closer to the output shaft of the motor, which can reduce the loss of motor speed when the motor is output, thereby improving the dust suction efficiency of the dust suction blades.

[0017] Secondly, the locking assembly arranged between the head shell assembly and the grinding disc in the utility model enables the head shell assembly to be installed with grinding discs of different shapes through the locking assembly, has strong applicability, and is very convenient during disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structure diagram of a grinder with a dust collection device of the utility model. Figure 1 .

[0019] Figure 2 This is a three-dimensional structure diagram of a grinder with a dust collection device of the utility model. Figure 2 .

[0020] Figure 3 The utility model is a cross-sectional structural schematic diagram of a grinder with a dust collecting device.

[0021] Figure 4 The utility model is a partially exploded structural schematic diagram of a grinder with a dust collecting device.

[0022] Figure 5 The utility model is a schematic diagram of the exploded structure of a grinder with a dust collecting device.

[0023] Figure 6 It is a schematic diagram of the exploded structure of the lock assembly in the utility model when viewed from above.

[0024] Figure 7 It is a schematic diagram of the exploded structure of the lock assembly in the utility model when viewed from above. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below with reference to the embodiments given in the accompanying drawings.

[0026] like Figures 1 to 7 As shown, this embodiment provides a grinder with a dust collecting device, including a grinding disc 1, a head shell assembly 2, a driving mechanism 3 and a dust collecting device 4, wherein the head shell assembly 2 is arranged on the top of the grinding disc 1, and a transmission mechanism 5 is arranged inside the head shell assembly 2. It also includes a housing 6 arranged on the grinding disc 1, one end of the housing 6 is provided with a through hole 7 and is connected to the head shell assembly 2, and specifically, the housing 6 and the head shell assembly 2 are fixed by screws.

[0027] As described above, the casing 6 is provided with an installation cavity 61 and an air cavity 62, the dust suction device 4 includes a dust suction blade 41 and a dust suction hose 42, the driving mechanism 3 includes a motor 31 and an output shaft 32, the motor 31 is installed in the installation cavity 61, one end of the output shaft 32 is connected to the motor 31, the dust suction blade 41 is accommodated in the air cavity 62 and is sleeved on the output shaft 32, the other end of the output shaft 32 is penetrated in the air cavity 62 and passes through the through hole 7 on the casing 6 and is connected to the transmission mechanism 5 for transmission. The upper end of the housing 6 is provided with an air outlet 63 connected to the air cavity 62, the grinding disc 1 is provided with a dust suction channel 11, the bottom of the housing 6 is provided with an air inlet 64 connected to the dust suction channel 11 and the air cavity 62, the head housing assembly 2 is rotatably connected with a front fork 8, one end of the dust suction hose 42 is connected to the air outlet 63, and the other end of the dust suction hose 42 is clamped and installed by the front fork 8, specifically, an aluminum tube 81 is fixed on the front fork 8, and the dust suction hose 42 is connected to the aluminum tube 81. Such a structural design allows the air cavity 62 and the installation cavity 61 to be designed in the same housing 6, which can ensure the concentricity of the dust suction blade 41 and the output shaft 32, and at the same time, the dust suction blade 41 can be closer to the output shaft 32 of the motor 31, which can reduce the loss of the motor 31 speed when the motor 31 is outputting, thereby improving the dust suction efficiency of the dust suction blade 41.

[0028] As described above, the housing 6 includes a first half shell 65 and a second half shell 66, which are divided into two halves. The first half shell 65 and the second half shell 66 surround and form an installation cavity 61 and a wind cavity 62 therein. Specifically, the first half shell 65 and the second half shell 66 are fixed by screws. Such a structural design makes the product very convenient to assemble.

[0029] As mentioned above, the air outlet 63 is located directly above the dust suction blade 41, and such a design can quickly discharge the dust. The air inlet 64 is provided with an air guide plate 67, which can multiply the airflow and quickly suck out the dust.

[0030] As described above, the end of the output shaft 32 close to the motor 31 is also provided with a heat dissipation blade 33, and the heat dissipation blade 33 is accommodated in the mounting cavity 61. Such a structural design can help the motor 31 to dissipate heat.

[0031] As described above, a locking assembly 9 is provided between the head shell assembly 2 and the grinding disc 1, and the head shell assembly 2 can be detachably connected to the grinding disc 1 through the locking assembly 9. Specifically, the grinding disc 1 is a grinding disc of other shapes such as a triangular grinding disc or a circular grinding disc.

[0032] As described above, the locking assembly 9 includes a connecting seat 91 fixedly mounted on the grinding disc 1 and a locking member 92 arranged on the head shell assembly 2. The connecting seat 91 is provided with a locking portion 910 that can be locked with the locking member 92. The grinding disc 1 and the head shell assembly 2 are detachably connected together through the locking cooperation between the locking member 92 and the locking portion 910.

[0033] As described above, the lock member 92 includes a lock member body 921 and a buckle member 93 disposed on both sides of the lock member body 921. The buckle member 93 includes a pressing portion 931 located at the upper end, a connecting portion 932 located in the middle, and a buckle portion 933 located at the lower end. The connecting portion 932 is rotatably connected to the lock member body 921 through a pin shaft 94. A torsion spring 95 is mounted on the pin shaft 94. One end of the torsion spring 95 is connected to the lock member body 921, and the other end of the torsion spring 95 is connected to the pressing portion 931. The buckle portion 933 can be locked with the lock member 910. Specifically, two corresponding lock members 910 are disposed and are disposed at both ends of the connecting seat 91. The buckle portion 933 is provided with a hook that can cooperate with the lock member 933.

[0034] As described above, the transmission mechanism 5 includes a bevel gear 51, a pinion gear 52 and a large gear 53, and the bevel gear 51 is meshed with the terminal teeth of the output shaft 32. The bevel gear 51 is connected to a first rotating shaft 54, and the pinion gear 52 is connected to a second rotating shaft 55. The first rotating shaft 54 ​​is inserted on the second rotating shaft 55 and can rotate synchronously. The large gear 53 is connected to a third rotating shaft 56, and the large gear 53 is rotatably installed in the grinding disc 1 through the third rotating shaft 56 and meshed with the pinion gear 52, and the third rotating shaft 56 is perpendicular to the output shaft 32.

[0035] As described above, the lower end of the locking member body 921 is provided with a first positioning protrusion 922 and a first positioning cavity 923, and the connecting seat 91 is provided with a second positioning protrusion 911 and a second positioning cavity 912. Specifically, the locking member body 921 is fixed to the bottom of the head shell assembly 2 by screws, and the connecting seat 91 is fixedly installed on the grinding disc 1 by screws. The outer periphery of the first positioning protrusion 922 is sleeved with a first damping ring 924, and the first positioning protrusion 922 can be inserted into the second positioning cavity 912, and the outer periphery of the first damping ring 924 abuts against the cavity wall of the second positioning cavity 912, which can play a good damping role. The center of the first positioning protrusion 922 is provided with a first through hole 925 for the first rotating shaft 54 ​​to extend out, and the second positioning cavity 912 is provided with a second through hole 913 for the second rotating shaft 55 to pass through, and the first rotating shaft 54 ​​passes through the first through hole 925 and is sleeved together with the second rotating shaft 55 from the second through hole 913. The outer periphery of the second positioning protrusion 911 is sleeved with a second shock-absorbing ring 914 , and the second positioning protrusion 911 can be inserted into the first positioning cavity 923 , and the outer periphery of the second shock-absorbing ring 914 abuts against the cavity wall of the first positioning cavity 923 , which can play a good shock-absorbing role.

[0036] In summary, when the grinding disc 1 needs to be replaced, the pressing portion 931 can be pressed to put the buckle portion 933 and the locking portion 910 in an unlocked state, so that the first positioning protrusion 922 and the second positioning cavity 912 can be separated, and the second positioning protrusion 911 and the first positioning cavity 923 can be separated, so that the grinding disc 1 is separated from the head shell assembly 2 and the grinding disc 1 is disassembled. Thereafter, the grinding disc 1 to be assembled is aligned with the head shell assembly 2, and a part of the first positioning protrusion 922 is inserted into the second positioning cavity 912, and the second positioning protrusion 911 is separated from the first positioning cavity 923. The second positioning protrusion 911 is partially inserted into the first positioning cavity 923, and then the pressing part 931 is pressed to make the buckling part 933 in an open state, and then the head shell assembly 2 is pressed downward with force to make the first positioning protrusion 922 completely inserted into the second positioning cavity 912, and the second positioning protrusion 911 is completely inserted into the first positioning cavity 923, and then the pressing part 931 is released to make the buckling part 933 lock with the locking part 910, so that the disassembly and replacement of the entire grinding disc 1 is completed, which is very convenient to use.

[0037] As mentioned above, a bearing sleeve 35 which can be fitted with the output shaft 32 is embedded in the through hole 7. Such a structural design makes the output shaft 32 more stable when rotating.

[0038] As described above, the center lines of the installation cavity 61, the air cavity 62 and the through hole 7 are on the same horizontal straight line. Such a structural design can ensure the concentricity of the dust suction blade 41 and the output shaft 32, thereby improving the dust suction efficiency of the dust suction blade 41.

[0039] The working principle of the grinder with dust suction device in this embodiment is as follows: when the motor 31 is started, the output shaft 32 drives the grinding disc 1 to grind through the transmission mechanism 5. At the same time, the dust suction blade 41 rotates to generate wind force, so that the dust generated during grinding is sucked into the wind cavity 62 through the dust suction channel 11, the air inlet 64 and the air guide plate 67, and is discharged through the air outlet 63, the dust suction hose 11 and the aluminum tube 81, thereby achieving dust suction while grinding.

[0040] The above is only a preferred embodiment of the present utility model, and it cannot be used to limit the scope of the present utility model. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present utility model and the content of the utility model description are still within the scope of the present utility model patent.

Claims

1. A grinder with a dust suction device, comprising a grinding disc, a head shell assembly, a driving mechanism and a dust suction device, wherein the head shell assembly is arranged on the top of the grinding disc, and a transmission mechanism is arranged inside the head shell assembly, characterized in that: The motor is installed in the installation cavity, one end of the output shaft is connected to the motor, the dust suction blade is accommodated in the wind cavity and sleeved on the output shaft, the other end of the output shaft passes through the wind cavity and passes out from the through hole on the casing and is transmission-connected to the transmission mechanism, the upper end of the casing is provided with an air outlet connected with the wind cavity, the grinding disc is provided with a dust suction channel, and the bottom of the casing is provided with an air inlet connecting the dust suction channel and the wind cavity, the head casing assembly is rotatably connected with a front fork, one end of the dust suction hose is connected to the air outlet, and the other end of the dust suction hose is clamped and installed by the front fork.

2. A grinder with a dust collection device according to claim 1, characterized in that: The housing comprises a first half shell and a second half shell divided into two halves, wherein the first half shell and the second half shell surround and form the installation cavity and the wind cavity therein.

3. A grinder with a dust collection device according to claim 2, characterized in that: A locking assembly is provided between the head shell assembly and the grinding disc, and the head shell assembly can be detachably connected to the grinding disc through the locking assembly.

4. A grinder with a dust collection device according to claim 3, characterized in that: The locking assembly includes a connecting seat fixedly mounted on the grinding disc and a locking member arranged on the head shell assembly, the connecting seat is provided with a locking portion that can be locked with the locking member, and the grinding disc and the head shell assembly are detachably connected together through the locking cooperation between the locking member and the locking portion.

5. A grinder with a dust collection device according to claim 4, characterized in that: The locking component includes a locking component body and buckles arranged on both sides of the locking component body, the buckle includes a pressing part located at the upper end, a connecting part located in the middle part and a buckling part located at the lower end, the connecting part is rotatably connected to the locking component body through a pin shaft, a torsion spring is mounted on the pin shaft, one end of the torsion spring is connected to the locking component body, and the other end of the torsion spring is connected to the pressing part, and the buckling part can be locked with the locking component.

6. A grinder with a dust collection device according to claim 5, characterized in that: The transmission mechanism includes a bevel gear, a pinion gear and a large gear, the bevel gear is meshed with the terminal teeth of the output shaft, the bevel gear is connected to a first rotating shaft, the pinion gear is connected to a second rotating shaft, the first rotating shaft is inserted into the second rotating shaft and can rotate synchronously, the large gear is connected to a third rotating shaft, the large gear is rotatably installed in the grinding disc through the third rotating shaft and meshed with the pinion gear.

7. A grinder with a dust collection device according to claim 6, characterized in that: The lower end of the lock body is provided with a first positioning protrusion and a first positioning cavity, and the connecting seat is provided with a second positioning protrusion and a second positioning cavity, the outer periphery of the first positioning protrusion is sleeved with a first shock-absorbing ring, the first positioning protrusion can be inserted into the second positioning cavity, and the outer periphery of the first shock-absorbing ring abuts against the cavity wall of the second positioning cavity, a first through hole for allowing the first rotating shaft to extend out is provided at the center of the first positioning protrusion, and a second through hole for allowing the second rotating shaft to pass through is provided in the second positioning cavity, the first rotating shaft passes through the first through hole and is sleeved together with the second rotating shaft from the second through hole, the outer periphery of the second positioning protrusion is sleeved with a second shock-absorbing ring, the second positioning protrusion can be inserted into the first positioning cavity, and the outer periphery of the second shock-absorbing ring abuts against the cavity wall of the first positioning cavity.

8. The grinder with a dust suction device according to claim 1, characterized in that: The end of the output shaft close to the motor is also provided with a heat dissipation blade, and the heat dissipation blade is accommodated in the installation cavity.

9. The grinder with a dust suction device according to claim 1, characterized in that: The air outlet is located directly above the dust suction blade, and an air guide plate is arranged in the air inlet.

10. The grinder with a dust suction device according to claim 1, characterized in that: The center lines of the installation cavity, the wind cavity and the through hole are on the same horizontal straight line.

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