Protective structure of horizontal tool sharpener

Abstract

The utility model relates to the field of grinding machine tools, and discloses a protection structure of a horizontal tool sharpener, which is arranged between a limiting convex ring of a central spindle and an end cover used for packaging the central spindle in a shell, and comprises an air homogenizing ring groove arranged between the end cover and the tail end of the central spindle; the airtight channel is communicated with the gas uniformizing ring groove and is formed between the end cover and the shaft core; the containing groove is formed in the end cover; the first liquid discharging channel is communicated with the containing groove and is arranged downwards in the axial direction; and the separation groove is annularly formed in the peripheral side of the limiting convex ring relative to the containing groove, communicates with the containing groove and is located at the end, away from the gas uniformizing ring groove, of the airtight channel. The protective structure can provide reliable airtight protection to improve the working reliability and the working precision of the tool sharpener.

Description

Technical Field

[0001] The utility model relates to the field of grinding machine tools, in particular to a protective structure of a horizontal knife grinder. Background Art

[0002] A knife grinder is a type of grinding machine tool equipment, primarily used for grinding metalworking tools such as turning tools and milling cutters. Horizontal knife grinders are currently commonly used in industrial processing to grind cutting tools. A horizontal knife grinder primarily consists of a housing, a shaft that can be rotatably positioned horizontally within the housing via bearings, a direct-drive motor disposed between the housing and the shaft, and a fixture connected to the shaft for locking or unlocking the tool. The tool being processed is secured to one end of the shaft via the fixture, and the shaft and tool are driven to rotate by the direct-drive motor, allowing the tool to cooperate with an external grinding wheel to grind the tool. However, due to the gaps between the shaft, bearing locking nut, and rear end cover of the horizontal knife grinder, foreign matter such as condensed water, hydraulic oil, cutting fluid, or dust generated during the grinding process can easily enter the interior of the knife grinder through the gaps, affecting the working stability and machining accuracy of the knife grinder. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art, and proposes a protective structure of a horizontal knife sharpener, which provides reliable airtight protection to improve the working reliability and working accuracy of the knife sharpener.

[0004] The utility model proposes a protective structure for a horizontal knife sharpener, which is arranged between a limiting convex ring of a shaft core and an end cover for encapsulating the shaft core in a shell, and includes: an air-uniform ring groove arranged between the end cover and the end of the core shaft; an airtight channel connected to the air-uniform ring groove, and the airtight channel is formed between the end cover and the shaft core; a receiving groove arranged in the end cover and a first liquid discharge channel connected to the receiving groove and arranged axially downward; and at least one separation groove arranged on the outer peripheral side of the limiting convex ring relative to the receiving groove, the separation groove being connected to the receiving groove and located at an end of the airtight channel away from the air-uniform ring groove.

[0005] In some preferred embodiments, the groove wall between the groove opening and the groove bottom of the separation groove is configured as an inclined surface.

[0006] In some preferred embodiments, the airtight channel includes: a first airtight channel connected to the outside along the end of the core shaft from one side of the air-uniform ring groove; and a second airtight channel formed between the other side of the air-uniform ring groove and the accommodating groove.

[0007] In some preferred embodiments, the second airtight channel is formed between the end cover and at least two adjacent side surfaces of the limiting protruding ring, so that the second airtight channel has a bent extension structure.

[0008] In some preferred embodiments, a labyrinth airtight structure is provided between the limiting protruding ring and the end cover.

[0009] In some preferred embodiments, the labyrinth airtight structure includes: at least one labyrinth convex ring arranged on the limiting convex ring; at least one labyrinth groove correspondingly arranged on the end cover, each of the labyrinth convex rings extends into a corresponding labyrinth groove to form a labyrinth airtight structure in a part of the airtight channel.

[0010] In some preferred embodiments, the airtight channel further includes a second liquid drainage channel arranged axially downward, and the second liquid drainage channel is located between the labyrinth airtight structure and the air uniforming annular groove.

[0011] In some preferred embodiments, a bearing is provided on the inner side surface of the limiting protruding ring, and the bearing is assembled between the shaft core and the housing.

[0012] In some preferred embodiments, the end cover is fixedly connected to the outer shell, and a sealing ring is provided between the end cover and the outer shell.

[0013] In some preferred embodiments, a gas source connector is provided on the outer shell, and gas supply channels are distributed inside the outer shell and the end cover, and the gas supply channels are connected between the gas source connector and the gas uniforming ring groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The utility model forms an airtight passage between the end cover and the end of the core shaft, and in particular, provides a receiving groove and a separation groove on the outer side of the limiting convex ring of the shaft core at the end of the airtight passage. The shaft core rotates to generate centrifugal force to throw debris entering the separation groove into the receiving groove and then be discharged through the first liquid discharge channel, thereby effectively preventing debris such as machining fluid and machining debris from passing through the gap between the end cover and the shaft core and entering the interior of the knife sharpener, thereby facilitating improving the working stability and working accuracy of the knife sharpener. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of a horizontal knife grinder.

[0017] Figure 2 It is a partial cross-sectional structural diagram of a horizontal knife grinder.

[0018] Figure 3 yes Figure 2 An enlarged view of a part A;

[0019] Figure 4 This is the main view of the horizontal knife sharpener;

[0020] Figure 5yes Figure 4 Schematic diagram of the partial cross-sectional structure of AA.

[0021] The meanings of the numbers in the figure are as follows: 1-base, 2-housing, 21-air source connector, 3-shaft core, 31-limiting convex ring, 32-labyrinth convex ring, 33-separation groove, 4-end cover, 41-gas uniform ring groove, 42-labyrinth groove, 43-accommodating groove, 44-first drainage channel, 45-second drainage channel, 5-bearing, 6-second airtight channel, 7-sealing ring, 8-air supply channel. DETAILED DESCRIPTION

[0022] To further illustrate the technical means and effects employed by this application to achieve its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of this application is provided in conjunction with the accompanying drawings and preferred embodiments. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0023] Combine Figure 1-Figure 5 As shown, the horizontal knife sharpener mainly includes a machine base 1, a shell 2 arranged on the machine base 1, a shaft core 3 rotatably arranged horizontally in the shell 2 through a bearing 5, a direct drive motor arranged between the shell 2 and the shaft core 3 for driving the shaft core 3, a clamp connected to the shaft core 3 for locking or unlocking the tool, and an end cover 4 for encapsulating the shaft core 3 in the shell 2.

[0024] The end cover 4 is fixedly connected to the outer shell 2 , and a sealing ring 7 is provided between the end cover 4 and the outer shell 2 to seal an assembly gap between the end cover 4 and the outer shell 2 using the sealing ring 7 .

[0025] Because the core shaft 3 can be driven by the direct drive motor to rotate relative to the housing 2, an assembly gap is provided between the end of the core shaft 3 and the end cap 4 to prevent rotational interference. The present invention provides a protective structure between the end of the core shaft 3 and the end cap 4. The protective structure forms an air curtain seal to prevent processing fluid, processing debris, etc. from entering the sharpener through the gap during use.

[0026] A limiting convex ring 31 is provided at the end of the shaft core 3, and a bearing 5 is provided on the inner side of the limiting convex ring 31. The bearing 5 is assembled between the shaft core 3 and the housing 2. The protective structure is specifically provided between the limiting convex ring 31 and the end cover 4.

[0027] The protective structure specifically includes: an air-uniform ring groove 41 arranged between the end cover 4 and the end of the core shaft 3; an airtight channel connected to the air-uniform ring groove 41, and the airtight channel is formed between the end cover 4 and the shaft core 3; a receiving groove 43 arranged in the end cover 4 and a first drainage channel 44 connected to the receiving groove 43 and arranged axially downward; at least one separation groove 33 arranged on the outer peripheral side of the limiting convex ring 31 relative to the receiving groove 43, the notch of the separation groove 33 is connected to the receiving groove 43, and the separation groove 33 is located at the end of the airtight channel away from the air-uniform ring groove 41.

[0028] The housing 2 is provided with a gas source connector 21. A gas supply channel 8 is distributed within the housing 2 and the end cap 4. The gas supply channel 8 communicates between the gas source connector 21 and the gas uniforming annular groove 41. The gas source connector 21 is connected to an external gas source. Gas with a certain pressure provided by the gas source is supplied to the gas uniforming annular groove 41 through the gas supply channel 8. After the gas uniforming annular groove 41 is filled with gas, the gas is allowed to enter the airtight channel from the gas uniforming annular groove 41.

[0029] Specifically, the airtight channel includes: a first airtight channel connected to the outside along the end of the core shaft 3 from one side of the air-uniform ring groove 41; and a second airtight channel 6 formed between the other side of the air-uniform ring groove 41 and the accommodating groove 43.

[0030] Therefore, the gas in the uniform air ring groove 41 is divided into two paths: one path of gas is leaked out through the first airtight channel to form an airtight seal on the gap between the end cover 4 and the end of the shaft core 3; the other path of gas enters the second airtight channel 6, and drives the processing fluid, processing debris, etc. that may enter the second airtight channel 6 to be blown to the separation groove 33. During the rotation of the shaft core 3, after the processing fluid, processing debris and other debris enter the separation groove 33, centrifugal force is generated as the shaft core 3 rotates, and the debris is thrown into the receiving groove 43 by the centrifugal force, and discharged through the first drainage channel 44 arranged axially downward, so as to further improve the protection performance of the sharpener.

[0031] At the same time, since the separation groove 33 is arranged on the outer peripheral side of the limiting convex ring 31, the wheelbase between the separation groove 33 and the rotation center axis of the shaft core 3 is large, so that the centrifugal force generated at the separation groove 33 is large, and the processing fluid, processing debris and other debris entering the separation groove 33 can be efficiently thrown out of the second airtight channel 6 through the large centrifugal force and discharged through the first drainage channel 44.

[0032] In order to improve the ability of the separation groove 33 to throw out debris using centrifugal force, on the one hand, the number of separation grooves 33 is set to multiple, and on the other hand, the groove wall between the groove mouth and the groove bottom of the separation groove 33 is set to a slope. The slope is used to guide the processing fluid, processing debris and other debris in the second airtight channel 6 to enter the separation groove 33 more efficiently.

[0033] In addition, in order to improve the sealing performance of the second airtight channel 6, the second airtight channel 6 is not linear. Specifically, the second airtight channel 6 is formed between the end cover 4 and at least two adjacent sides of the limiting protruding ring 31, so that the second airtight channel 6 has a bent extension structure.

[0034] Furthermore, a labyrinth airtight structure is provided between the limiting convex ring 31 and the end cover 4, so as to utilize the labyrinth airtight structure to further improve the sealing performance of the second airtight channel 6.

[0035] The labyrinth airtight structure includes: at least one labyrinth convex ring 32 arranged on the limiting convex ring 31; at least one labyrinth groove 42 correspondingly arranged on the end cover 4, each of the labyrinth convex rings 32 extends into a corresponding labyrinth groove 42 to form a labyrinth airtight structure in a part of the airtight channel.

[0036] Furthermore, a second drainage channel 44 is provided axially downward between the labyrinth airtight structure and the air-uniform ring groove 41, so that debris entering the second airtight channel 6 can be partially discharged from the second drainage channel 44 under the action of airflow before reaching the labyrinth airtight structure.

[0037] The principle of the protective structure forming an airtight protection during the operation of the knife sharpener is as follows: when the knife sharpener is working, the direct drive motor drives the shaft core 3 to rotate, driving the tool fixed by the clamp to grind the tool relative to the external grinding wheel; the external air source provides gas with a certain air pressure, which is sent into the uniform air ring groove 41 through the air supply channel 8. After the uniform air ring groove 41 is filled, a path of gas leaks out from the first airtight channel to form an air curtain for the gap between the end cover 4 and the shaft core 3. The air curtain is used to form a primary airtight structure to prevent the machining fluid, machining debris and other debris generated during the machining process from entering; the gas in the uniform air ring groove 41 After another part of the gas enters the second airtight channel 6, part of the gas is discharged from the second drainage channel 45 with the debris, and the remaining gas continues to move in the second airtight channel 6. After the debris is blocked by the maze airtight structure to reduce its movement speed, the debris further moves into the separation groove 33. The centrifugal force provided by the separation groove 33 throws the debris into the receiving groove 43 and is then discharged from the second drainage channel 45, which effectively prevents the processing fluid, processing debris and other debris from passing through the gap between the end cover 4 and the shaft core 3 into the interior of the sharpener, thereby helping to improve the working stability and working accuracy of the sharpener.

[0038] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A protective structure for a horizontal knife sharpener, characterized in that: The protective structure is arranged between a limiting convex ring (31) of the shaft core (3) and an end cover (4) for encapsulating the shaft core (3) in the housing (2), and comprises: An air-uniform ring groove (41) provided between the end cover (4) and the end of the shaft core (3); An airtight passage communicating with the air-uniform ring groove (41), the airtight passage being formed between the end cover (4) and the shaft core (3); A receiving groove (43) provided on the end cover (4) and a first liquid discharge channel (44) connected to the receiving groove (43) and provided axially downward; At least one separation groove (33) is arranged on the outer peripheral side of the limiting convex ring (31) relative to the accommodating groove (43), and the notch of the separation groove (33) is connected to the accommodating groove (43).

2. The protective structure according to claim 1, characterized in that: The groove wall between the groove opening and the groove bottom of the separation groove (33) is configured as an inclined surface.

3. The protective structure according to claim 1, characterized in that: The airtight passage comprises: a first airtight passage extending from one side of the air-uniform ring groove (41) along the end of the shaft core (3) and communicating with the outside; A second airtight channel (6) is formed between the other side of the air-uniform ring groove (41) and the accommodating groove (43).

4. The protective structure according to claim 3, characterized in that: The second airtight channel (6) is formed between the end cover (4) and at least two adjacent side surfaces of the limiting protruding ring (31), so that the second airtight channel (6) has a bent extension structure.

5. The protective structure according to claim 1, characterized in that: A labyrinth airtight structure is provided between the limiting convex ring (31) and the end cover (4).

6. The protective structure according to claim 5, characterized in that: The labyrinth airtight structure comprises: at least one labyrinth convex ring (32) arranged on the limiting convex ring (31); and at least one labyrinth groove (42) correspondingly arranged on the end cover (4), each of the labyrinth convex rings (32) extending into a corresponding labyrinth groove (42) so that a part of the airtight channel forms a labyrinth airtight structure.

7. The protective structure according to claim 5, characterized in that: The airtight channel further comprises a second liquid drainage channel (45) arranged axially downward, wherein the second liquid drainage channel (45) is located between the labyrinth airtight structure and the air uniforming annular groove (41).

8. The protective structure according to claim 1, characterized in that: A bearing (5) is provided on the inner side surface of the limiting convex ring (31), and the bearing (5) is assembled between the shaft core (3) and the housing (2).

9. The protective structure according to claim 1, characterized in that: The end cover (4) is fixedly connected to the outer shell (2), and a sealing ring (7) is provided between the end cover (4) and the outer shell (2).

10. The protective structure according to claim 1, characterized in that: An air source connector (21) is provided on the housing (2), and an air supply channel (8) is distributed inside the housing (2) and the end cover (4). The air supply channel (8) is connected between the air source connector (21) and the air uniforming ring groove (41).

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