Toothless saw main shaft with cooling and lubricating functions

Abstract

The utility model belongs to the technical field of cutting machines, and particularly relates to a toothless saw main shaft with cooling and lubricating functions, which comprises a main shaft cylinder, bearings mounted at two ends of the main shaft cylinder, a main shaft mounted between the two bearings, a storage cavity arranged between the main shaft and the main shaft cylinder, and end covers mounted on the main shaft cylinder and used for pressing the bearings. A fastening assembly used for locking the saw blade is installed on the main shaft, a through hole is formed in the main shaft, an air hole used for communicating the through hole with the storage cavity is formed in the main shaft, a rotary connector and a sealing cover are installed at one end of the main shaft, a plug is installed at the other end of the main shaft, and gaps are formed between the fastening assembly and the main shaft cylinder and between the sealing cover and the end cover. And in the rotating process of the main shaft, negative pressure always exists in the storage cavity, so that external dust can be prevented from entering the storage cavity, the service life is prolonged, and the cutting precision is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting machines, and in particular relates to a toothless saw spindle with self-cooling and lubrication. Background Art

[0002] Linear guides are important parts in machine tools. Linear guides are cut into different lengths according to different usage requirements. Guide cutting is generally carried out on a toothless sawing machine. The accuracy of the toothless saw spindle directly affects the accuracy of linear guide cutting. The toothless saw spindle has problems such as temperature rise and inadequate lubrication during operation, which causes the spindle accuracy to decrease, thereby affecting the guide cutting accuracy.

[0003] The bearings of existing toothless saws are lubricated with grease. Since a lot of dust is generated when the toothless saw cuts the guide rail, the main shaft of the existing toothless saw is not properly sealed, and the dust will enter the inside of the main shaft, causing bearing wear. In addition, when the toothless saw is used for a long time, the temperature of the main shaft will increase, causing thermal deformation of the main shaft, thereby affecting the accuracy of the main shaft and causing errors in the cut guide rail. The dust will also affect the service life of the toothless saw. Utility Model Content

[0004] In order to solve the above technical problems, the utility model further proposes a toothless saw spindle with self-cooling and lubrication.

[0005] The specific technical scheme of the utility model is as follows: a toothless saw spindle with self-cooling and lubrication, comprising a spindle cylinder, bearings are installed at both ends of the spindle cylinder, a spindle is installed between the two bearings, a storage cavity is arranged between the spindle and the spindle cylinder, an end cover for pressing the bearings is installed on the spindle cylinder, a fastening assembly for locking the saw blade is installed on the spindle, a through hole is opened in the spindle, an air hole for connecting the through hole with the storage cavity is opened on the spindle, a swivel joint and a sealing cover are installed at one end of the spindle, a plug is installed at the other end of the spindle, and gaps are arranged between the fastening assembly and the sealing cover and the spindle cylinder and the end cover.

[0006] Furthermore, the fastening assembly includes a positioning disk, the positioning disk is installed on the main shaft, a pressure plate for cooperating with the positioning disk to clamp the saw blade is sleeved on the main shaft, and a locking nut is threadedly connected to the main shaft.

[0007] Furthermore, a spacer sleeve is sleeved on the main shaft.

[0008] Furthermore, the gap is arranged in a bow shape.

[0009] Furthermore, a small circular hole communicating with the through hole is provided on the circumference of the plug.

[0010] Furthermore, the diameter of one end of the through hole is larger than the diameter of the other end.

[0011] Furthermore, grooves are provided on the positioning plate and the pressure plate.

[0012] Beneficial effects:

[0013] The present application comprises bearings installed at both ends of the spindle tube, a spindle installed between the two bearings, a storage cavity provided between the spindle and the spindle tube, an end cover for pressing the bearing installed on the spindle tube, a fastening assembly for locking the saw blade installed on the spindle, a through hole is provided in the spindle, an air hole for connecting the through hole with the storage cavity is provided on the spindle, a swivel joint and a cover are installed at one end of the spindle, a plug is installed at the other end of the spindle, a gap is provided between the fastening assembly and the cover and the spindle tube and the end cover, a coolant pipe is connected to the swivel joint, the other end of the coolant pipe is inserted into the coolant barrel, and then the spindle is driven to rotate by a motor, and the spindle rotates The fastening assembly and the cover for locking the saw blade are driven to rotate, so that the gas in the storage chamber and the through hole emerges from the gap, and the pressure in the storage chamber and the through hole is reduced to generate negative pressure. Under the action of atmospheric pressure, the coolant enters the through hole through the coolant pipe and the rotary joint, and then the coolant enters the storage chamber through the air hole. The coolant in the storage chamber will cool and lubricate the bearings and the main shaft in the process of flowing to the gap, thereby preventing the main shaft from being deformed by heat and affecting the cutting accuracy. Since there is always negative pressure inside the storage chamber during the rotation of the spindle, it can prevent external dust from entering the storage chamber, thereby extending the service life and improving the cutting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the fastening assembly structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the main shaft structure of the utility model.

[0017] Description of the markings in the figure:

[0018] Spindle cylinder 1, bearing 2, spindle 3, storage chamber 4, end cover 5, saw blade 6, fastening assembly 7, positioning plate 71, pressure plate 72, locking nut 73, spacer sleeve 74, through hole 8, air hole 9, swivel joint 10, cover 11, plug 12, gap 13, groove 14. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0021] Example 1: Combination Figures 1 to 3 A toothless saw spindle with self-cooling and lubrication is described, comprising a spindle cylinder 1, bearings 2 are installed at both ends of the spindle cylinder 1, a spindle 3 is installed between the two bearings 2, a storage cavity 4 is arranged between the spindle 3 and the spindle cylinder 1, an end cover 5 for pressing the bearing 2 is installed on the spindle cylinder 1, a fastening assembly 7 for locking the saw blade 6 is installed on the spindle 3, a through hole 8 is opened in the spindle 3, an air hole 9 for connecting the through hole 8 with the storage cavity 4 is opened on the spindle 3, a swivel joint 10 and a cover 11 are installed at one end of the spindle 3, a plug 12 is installed at the other end of the spindle 3, and a gap 13 is arranged between the fastening assembly 7 and the cover 11 and the spindle cylinder 1 and the end cover 5. The present application comprises bearings 2 installed at both ends of a spindle barrel 1, a spindle 3 installed between the two bearings 2, a storage chamber 4 arranged between the spindle 3 and the spindle barrel 1, an end cover 5 for pressing the bearing 2 installed on the spindle barrel 1, a fastening assembly 7 for locking a saw blade 6 installed on the spindle 3, a through hole 8 opened in the spindle 3, an air hole 9 for connecting the through hole 8 with the storage chamber 4 opened on the spindle 3, a swivel joint 10 and a cover 11 installed at one end of the spindle 3, a plug 12 installed at the other end of the spindle 3, a gap 13 arranged between the fastening assembly 7 and the cover 11 and the spindle barrel 1 and the end cover 5, a coolant pipe connected to the swivel joint 10, the other end of the coolant pipe is inserted into the coolant barrel, and then the spindle 3 is driven by a motor to rotate. The main shaft 3 rotates, driving the fastening assembly 7 and the cover 11 for locking the saw blade 6 to rotate, so that the gas in the storage chamber 4 and the through hole 8 emerges from the gap 13, and the pressure in the storage chamber 4 and the through hole 8 is reduced to generate negative pressure. Under the action of atmospheric pressure, the coolant enters the through hole 8 through the coolant pipe and the rotary joint 10, and then the coolant enters the storage chamber 4 through the air hole 9. The coolant in the storage chamber 4 will cool and lubricate the bearing 2 and the main shaft 3 in the process of flowing to the gap 13, thereby preventing the main shaft 3 from being deformed by heat and affecting the cutting accuracy. Since there is a negative pressure inside the storage chamber 4 all the time during the rotation of the main shaft 3, it can prevent external dust from entering the storage chamber 4, thereby extending the service life and improving the cutting accuracy.

[0022] Example 2: Based on Example 1, Figure 2For explanation, the fastening assembly 7 includes a positioning disk 71, the positioning disk 71 is installed on the spindle 3, a pressure disk 72 for cooperating with the positioning disk 71 to clamp the saw blade 6 is sleeved on the spindle 3, and a locking nut 73 is threadedly connected on the spindle 3. In the present application, the positioning disk 71 is installed on the spindle 3, the pressure disk 72 for cooperating with the positioning disk 71 to clamp the saw blade 6 is sleeved on the spindle 3, and the locking nut 73 is threadedly connected on the spindle 3. The positioning disk 71 and the pressure disk 72 are used to clamp the saw blade 6 on the spindle 3, so that the saw blade 6 is driven to rotate when the spindle 3 rotates, thereby facilitating the operation, facilitating the installation of the saw blade 6, and reducing the labor intensity.

[0023] Example 3: Based on Example 1, Figure 2 For explanation, the spindle 3 is sleeved with a spacer sleeve 74. The present application sleeves the spindle 3 with a spacer sleeve 74, and uses the spacer sleeve 74 to separate the positioning disk 71 and the shoulder of the spindle 3, so as to prevent the positioning disk 71 from causing wear to the spindle 3. One end of the spacer sleeve 74 contacts the inner ring of the bearing 2, and the other end contacts the positioning disk 71, so that the bearing 2 can be more stable when rotating, the cutting accuracy is improved, and the service life is extended.

[0024] Embodiment 4: Based on Embodiment 1, Figure 3 For explanation, the gap 13 is set in a bow shape. The present application sets the gap 13 in a bow shape, and the bow-shaped gap 13 can further reduce dust from entering the storage cavity 4, and can further prevent dust from affecting the bearing 2 and the main shaft 3, thereby extending the service life and improving the cutting accuracy.

[0025] Example 5: Based on Example 1, Figure 2 For explanation, the plug 12 is provided with a small circular hole on its circumference that is connected to the through hole 8. In the present application, the plug 12 is provided with a small circular hole on its circumference that is connected to the through hole 8, so that the coolant in the through hole 8 can flow to the outside through the small circular hole on the plug 12, and the outflowing coolant can reduce the temperature of the saw blade 6 during cutting, and can also reduce the generation of dust, thereby improving the cutting accuracy and the service life of the saw blade 6.

[0026] Example 6: Based on Example 1, Figure 3 For explanation, the diameter of one end of the through hole 8 is larger than the diameter of the other end. The present application sets the diameter of one end of the through hole 8 to be larger than the diameter of the other end, so that the end close to the plug 12 has a smaller diameter and the end close to the swivel joint 10 has a larger diameter, so that the coolant can fully enter the through hole 8, and then a small amount of coolant flows out from the small round hole of the plug 12, thereby forming coolant mist, thereby achieving the effect of reducing dust and improving the sanitation of the working environment.

[0027] Example 7: Based on Example 2, Figure 2For explanation, the positioning plate 71 and the pressure plate 72 are both provided with a groove 14. The present application provides the positioning plate 71 and the pressure plate 72 with the groove 14, which can reduce the material used for the positioning plate 71 and the pressure plate 72, thereby saving the manufacturing cost. The groove 14 can allow the positioning plate 71 and the pressure plate 72 to have enough space for thermal deformation, and will not squeeze the saw blade 6, causing the saw blade 6 to deform, thereby improving the cutting accuracy and extending the service life.

[0028] Working process:

[0029] During cooling, the rotation of the spindle 3 drives the fastening assembly 7 and the cover 11 for locking the saw blade 6 to rotate, so that the gas in the storage chamber 4 and the through hole 8 emerges from the gap 13, and the pressure in the storage chamber 4 and the through hole 8 is reduced to produce negative pressure. Under the action of atmospheric pressure, the coolant enters the through hole 8 through the coolant pipe and the rotary joint 10, and then the coolant enters the storage chamber 4 through the air hole 9. The coolant in the storage chamber 4 will cool and lubricate the bearing 2 and the spindle 3 in the process of flowing to the gap 13, thereby preventing external dust from entering the storage chamber 4, extending the service life and improving the cutting accuracy.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A toothless saw spindle with self-cooling and lubrication, characterized in that: The invention comprises a main shaft cylinder (1), bearings (2) are installed at both ends of the main shaft cylinder (1), a main shaft (3) is installed between the two bearings (2), a storage cavity (4) is arranged between the main shaft (3) and the main shaft cylinder (1), an end cover (5) for pressing the bearing (2) is installed on the main shaft cylinder (1), a fastening assembly (7) for locking a saw blade (6) is installed on the main shaft (3), a through hole (8) is opened in the main shaft (3), an air hole (9) for connecting the through hole (8) with the storage cavity (4) is opened on the main shaft (3), a swivel joint (10) and a sealing cover (11) are installed at one end of the main shaft (3), a plug (12) is installed at the other end of the main shaft (3), and a gap (13) is arranged between the fastening assembly (7) and the sealing cover (11) and the main shaft cylinder (1) and the end cover (5).

2. The toothless saw spindle with self-cooling and lubrication according to claim 1, characterized in that: The fastening assembly (7) comprises a positioning disk (71), the positioning disk (71) is mounted on the main shaft (3), a pressure disk (72) is sleeved on the main shaft (3) and is used to cooperate with the positioning disk (71) to clamp the saw blade (6), and a locking nut (73) is threadedly connected to the main shaft (3).

3. The toothless saw spindle with self-cooling and lubrication according to claim 1, characterized in that: A spacer sleeve (74) is sleeved on the main shaft (3).

4. The toothless saw spindle with self-cooling and lubrication according to claim 1, characterized in that: The gap (13) is arranged in a bow shape.

5. The toothless saw spindle with self-cooling and lubrication according to claim 1, characterized in that: The plug (12) is provided with a small circular hole on its circumference which is connected with the through hole (8).

6. The toothless saw spindle with self-cooling and lubrication according to claim 1, characterized in that: The diameter of one end of the through hole (8) is larger than the diameter of the other end.

7. The toothless saw spindle with self-cooling and lubrication according to claim 2, characterized in that: The positioning plate (71) and the pressure plate (72) are both provided with grooves (14).

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