Waterproof spindle box structure

Abstract

The utility model relates to the technical field of spindle boxes, and discloses a waterproof spindle box structure which comprises a spindle box body and a spindle installed in the spindle box body, a rib plate is installed in an inner cavity of the spindle box body so as to form a transmission cavity used for installing a synchronous belt wheel and a synchronous belt, a reserved hole communicated with the transmission cavity is formed in the outer portion of the spindle box body and used for installation and debugging of the synchronous belt wheel and the synchronous belt, and an opening of the reserved hole is sealed through a waterproof cover plate. The synchronous belt is isolated from external cutting fluid, corrosion of the cutting fluid to the synchronous belt is effectively avoided, the service life of the synchronous belt is prolonged, the synchronous belt does not need to be replaced frequently in the machining process, continuous operation of equipment is guaranteed, and therefore the production and machining efficiency is improved, enterprises can complete production tasks on time, economic benefits are improved, and the production cost is reduced. The economic loss caused by the damage of the synchronous belt is reduced, and the weight of the spindle box is reduced on the basis of ensuring the strength.

Description

Technical Field

[0001] This utility model relates to the field of spindle box technology, specifically a waterproof spindle box structure. Background Technology

[0002] In machine tool processing workshops, the stable operation of machine tool equipment is crucial to production efficiency and product quality. Among them, the spindle box, as a key component of the machine tool, directly affects the machining accuracy and service life of the equipment.

[0003] Currently, spindle box such as Figure 5 As shown, the spindle box has many holes, making it open and with many stiffeners. This is mainly because the spindle box is a precision moving part. In order to obtain high strength and high rigidity, it can also have a better dynamic response effect, thereby achieving better machining accuracy.

[0004] In machine tool processing, to ensure machining accuracy and extend tool life, a large amount of cutting fluid is usually used. Figure 5 When the spindle box is open, the timing belt is exposed due to its open structure design. Cutting fluid may splash onto the belt, especially in models with center-outlet water, where the pressure of the cutting fluid can reach 2 to 10 MPa, making it easier for it to splash onto the belt. Cutting fluid contains a variety of chemical components and is highly corrosive. Long-term contact with the timing belt will cause it to gradually age and deform, and the surface rubber layer will be eroded, resulting in reduced friction of the timing belt and decreased transmission accuracy.

[0005] Damage to the timing belt not only affects the transmission effect, but may also cause serious production accidents. In high-speed machine tools, once the timing belt fails, such as breaking or skipping teeth, it will cause the spindle speed to be unstable, which in turn will increase the dimensional deviation of the machined parts and significantly increase the scrap rate of the products.

[0006] Frequent timing belt replacements not only require frequent machine shutdowns but also necessitate the operation of specialized technicians. The entire process can take several hours or even longer, during which the production line may be forced to stop, leading to production delays. Statistics show that downtime caused by timing belt damage can reduce workshop output by 10%-20% each month, severely impacting the company's ability to complete orders on time, reducing its market competitiveness, and increasing procurement costs. Coupled with labor costs during replacement and production losses caused by downtime, this significantly increases the company's expenditure in this area, squeezing profit margins. In an increasingly competitive market, this undoubtedly places a heavy burden on the company. Utility Model Content

[0007] To address the technical problems existing in the background art, this utility model proposes a waterproof spindle box structure.

[0008] The present invention proposes a waterproof spindle box structure, including a spindle box body and a spindle installed in the spindle box body. Ribs are installed in the inner cavity of the spindle box body to form a transmission cavity for installing a timing pulley and a timing belt. A reserved hole connected to the transmission cavity is opened on the outside of the spindle box body for the installation and adjustment of the timing pulley and the timing belt. The opening of the reserved hole is sealed by a waterproof cover plate.

[0009] The stiffeners create a transmission cavity within the spindle box housing. This design places the timing pulley and timing belt in a relatively enclosed space, effectively isolating them from external cutting fluid. During machine tool processing, cutting fluid usually splashes everywhere. If the timing belt is exposed, it is easily corroded by the cutting fluid. The existence of the transmission cavity provides protection for the timing belt.

[0010] The reserved holes are designed to facilitate the operation of operators when installing and debugging the timing pulleys and timing belts, without requiring large-scale disassembly of the spindle box. After installation and debugging, the reserved holes are sealed with a waterproof cover plate to ensure that the timing belt in the transmission cavity is completely isolated from the external cutting fluid, thereby extending the service life of the timing belt, reducing equipment downtime caused by timing belt damage, and ensuring the continuity of production and processing.

[0011] Taking actual production data as an example, the timing belt in a traditional open spindle box may need to be replaced 1-2 times a month due to corrosion. However, this structure can extend the replacement cycle to several months or even longer. During the processing, there is no need to frequently replace the timing belt, which reduces downtime, ensures the continuous and stable operation of the equipment, and thus improves production efficiency. According to statistics, using this structure can reduce the downtime caused by timing belt failure in the workshop by 80%-90% per month.

[0012] As a further optimized solution of this utility model, the stiffening plate has multiple intersecting reinforcing ribs, and the stiffening plate is installed at the lower end of the inner cavity of the spindle box body, and the upper end of the stiffening plate forms a transmission cavity with the upper wall of the inner cavity of the spindle box body.

[0013] Multiple reinforcing ribs on the stiffening plate are arranged perpendicularly to each other, much like the steel frame in a building, which greatly enhances the strength and rigidity of the spindle box. This structural design allows the spindle box to remain stable even when subjected to large external forces, reducing the possibility of deformation. The stiffening plate is installed at the lower end of the inner cavity of the spindle box, and its upper end forms a transmission cavity with the upper wall of the inner cavity. This not only makes reasonable use of space, but also improves the overall performance of the spindle box without affecting the installation and operation of components such as the timing belt. In actual machining processes, a stable spindle box is crucial to ensuring machining accuracy, and this stiffening rib structure can effectively reduce machining errors caused by spindle box vibration or deformation.

[0014] As a further optimization of this utility model, the reinforcing ribs of the stiffening plate are provided with circular holes. On the one hand, these circular holes reduce the weight of the spindle box to a certain extent, which helps to improve the dynamic response of the equipment, enabling the spindle box to respond to various motion commands more quickly and accurately, thereby improving machining accuracy. On the other hand, the circular holes do not affect the reinforcing effect of the stiffening ribs on the strength of the spindle box. Through reasonable structural design, the presence of the circular holes does not weaken the mechanical properties of the stiffening ribs and can still ensure the stability of the spindle box under external forces, achieving the goal of optimizing equipment performance while ensuring strength.

[0015] As a further optimized solution of this utility model, the reserved hole includes a first reserved hole and a second reserved hole. The first reserved hole and the second reserved hole are respectively set above one end of the timing belt and below the other end. The openings of the first reserved hole and the second reserved hole are sealed by the first waterproof cover plate and the second waterproof cover plate, respectively.

[0016] Two pre-drilled holes, namely the first pre-drilled hole and the second pre-drilled hole, are set at the two ends of the timing belt, respectively. This layout facilitates the installation and debugging of the timing belt. During the installation process, the operator can operate the timing belt and timing pulley through the pre-drilled holes from different angles, making the installation process more convenient and efficient. After installation, the two pre-drilled holes are sealed with the first waterproof cover plate and the second waterproof cover plate respectively to ensure the airtightness of the transmission cavity and effectively prevent cutting fluid from entering the transmission cavity through the pre-drilled holes and causing corrosion to the timing belt. This design ensures waterproof performance while taking into account the convenience of equipment installation and maintenance.

[0017] As a further optimized solution of this utility model, a tool-changing cylinder mounting hole is provided at the upper end of the spindle box body. The tool-changing cylinder is installed at the upper end of the spindle box body. The output end of the tool-changing cylinder passes through the tool-changing cylinder mounting hole and extends into the spindle box body, driving the gripper at the lower end of the spindle to move.

[0018] The tool-changing cylinder mounting hole provides accurate positioning and installation location for the connection between the spindle box and the tool-changing cylinder. The tool-changing cylinder is installed at the upper end of the spindle box housing, and its output end passes through the mounting hole and extends into the interior of the spindle box housing, directly driving the jaws at the lower end of the spindle. During machining, the jaws are used to hold the tool, and the function of the tool-changing cylinder is to control the opening and closing of the jaws to realize the loading and unloading of the tool (this is existing technology, so it will not be described in detail). This design makes the connection between the tool-changing cylinder and the spindle box tight and reasonable, ensuring the accuracy and stability of the tool loading and unloading action, improving the efficiency of tool changing during machining, and thus improving the efficiency of the entire machining process.

[0019] As a further optimized solution of this utility model, a motor mounting hole is provided at the upper end of the spindle box body. The motor is mounted at the motor mounting hole through a motor mounting plate. The output end of the motor passes through the motor mounting hole and extends into the spindle box body and drives the synchronous belt pulley to rotate.

[0020] The motor mounting holes ensure that the motor can be accurately installed on the spindle box housing. The motor mounting plate further enhances the stability of the motor installation. The motor output end passes through the motor mounting holes into the spindle box housing and directly drives the synchronous pulleys to rotate. There are two synchronous pulleys, one connected to the motor output end and the other connected to the upper end of the spindle. The synchronous pulleys transmit power to the spindle through the synchronous belt, driving the spindle to rotate. This design ensures the stability and efficiency of power transmission between the motor and the synchronous pulleys, ensuring that the spindle box can obtain a stable power source, thereby ensuring the stability and precision of the entire machining process.

[0021] The waterproof spindle box structure proposed in this utility model has the following beneficial effects:

[0022] (i) The transmission cavity is constructed by using ribs, and the timing pulley and timing belt are installed and adjusted using the reserved holes. After that, the timing belt is sealed with a waterproof cover plate to completely isolate it from the cutting fluid. This effectively avoids the corrosion of the timing belt by the chemical components in the cutting fluid, greatly extends the service life of the timing belt, and eliminates the need for frequent replacement of the timing belt during the processing. This reduces downtime, ensures the continuous and stable operation of the equipment, and improves production efficiency. It helps enterprises complete production tasks on time, significantly improves economic benefits, and greatly reduces economic losses caused by timing belt damage, including timing belt purchase costs, replacement labor costs, and production losses caused by downtime. This increases enterprise profits and reduces the enterprise's production burden.

[0023] (ii) The stiffener plate has multiple intersecting reinforcing ribs, which are installed at the lower end of the inner cavity of the spindle box. Its upper end forms a transmission cavity with the upper wall of the inner cavity of the spindle box. This structural design enhances the strength and rigidity of the spindle box without affecting the installation and debugging of the synchronous belt. At the same time, the stiffener plate has round holes, which reduces the weight of the spindle box while ensuring strength. This helps to improve the dynamic response of the spindle box, thereby improving the machining accuracy and meeting the needs of precision machining.

[0024] (III) The pre-drilled holes on the spindle box facilitate the installation and adjustment of the timing pulley and timing belt. During installation, operators can operate through the pre-drilled holes without complicated disassembly of the spindle box. During maintenance, the pre-drilled holes also allow for quick inspection and replacement of timing belt components. Combined with the sealing design of the waterproof cover, the waterproof performance is guaranteed while also facilitating internal inspection, reducing the difficulty of equipment installation and maintenance and improving work efficiency.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the installation structure of the synchronous belt of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the spindle box body of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the present invention after assembly;

[0029] Figure 4 This is a schematic diagram of the internal stiffening plate structure of the spindle box body of this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of an open spindle box in the prior art.

[0031] Figure descriptions: 1. Spindle box housing; 2. Rib plate; 3. Spindle; 4. Synchronous pulley; 5. Synchronous belt; 6. First reserved hole; 7. Second reserved hole; 8. Tool-removing cylinder mounting hole; 9. Motor mounting hole; 10. Tool-removing cylinder; 11. Motor; 12. Motor mounting plate; 13. First waterproof cover plate; 14. Second waterproof cover plate. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] In the field of spindle box technology, traditional open spindle boxes suffer from the problem of synchronous belts being susceptible to corrosion by cutting fluid, affecting equipment operation and production efficiency. This utility model's waterproof spindle box structure addresses this issue with an innovative design. Through the coordinated work of multiple key components, it achieves excellent waterproof performance and stable transmission function. Its specific implementation is as follows:

[0035] like Figure 1 As shown, the waterproof spindle box structure mainly consists of a spindle box body 1 and a spindle 3 installed inside the body. In the inner cavity of the spindle box body 1, a stiffening plate 2 is installed. The stiffening plate 2 and the upper wall of the inner cavity of the spindle box body 1 together form a transmission cavity for installing the synchronous pulley 4 and the synchronous belt 5. The design of this transmission cavity is the key to waterproofing. It isolates the synchronous pulley 4 and the synchronous belt 5 from the external environment and avoids direct contact with the cutting fluid.

[0036] like Figure 2 As shown, a reserved hole communicating with the transmission cavity is provided on the outside of the spindle box 1, including a first reserved hole 6 and a second reserved hole 7. The function of these reserved holes is to provide operating space for operators when installing and adjusting the timing pulley 4 and timing belt 5, so as to facilitate related operations without the need for large-scale disassembly of the spindle box.

[0037] like Figure 3 As shown, after installation and commissioning, the openings of the first reserved hole 6 and the second reserved hole 7 are sealed by the first waterproof cover plate 13 and the second waterproof cover plate 14 respectively, to ensure that the synchronous belt 5 in the transmission cavity is completely isolated from the outside world, effectively preventing the cutting fluid from entering, thereby extending the service life of the synchronous belt 5 and ensuring the continuous and stable operation of the equipment.

[0038] like Figure 4 As shown, the stiffening plate 2 is installed at the lower end of the inner cavity of the spindle box 1. It has multiple intersecting stiffening ribs, which are like the skeleton in the building structure, greatly enhancing the strength and rigidity of the spindle box 1. During the machining process, the spindle box will be subjected to various external forces, and this stiffening rib structure can effectively reduce the deformation of the spindle box, ensure its stability, and thus improve the machining accuracy.

[0039] The reinforcing ribs on the stiffening plate 2 also have round holes. These round holes reduce the weight of the spindle box without affecting the reinforcing effect of the stiffening ribs on the strength of the spindle box. The lighter spindle box helps to improve the dynamic response of the equipment, enabling it to respond to various motion commands more quickly and accurately, and further meet the needs of precision machining.

[0040] Based on finite element analysis, as shown in the table below, this structure improves all four vibration frequencies of the original spindle box except for the second-order vibration frequency, effectively reducing vibration interference during machining and improving machining quality. After optimization, the net weight of the new spindle box is 218kg, while the net weight of the original spindle box before optimization was 248kg. The optimized structure not only prevents cutting fluid damage but also improves the rigidity of the spindle and reduces weight, saving costs.

[0041] Vibration order Original spindle box vibration frequency Hz Optimized spindle box vibration frequency (Hz) Improvement rate 1 388.67 417.03 7.3％ 2 529.58 426.79 -19.4％ 3 591.74 831.81 40.6％ 4 820.78 888.16 8.2％ 5 1005.3 1037 3.2％

[0042] like Figures 1-3 As shown, a tool-removing cylinder mounting hole 8 is provided at the upper end of the spindle box 1. The tool-removing cylinder 10 is installed at the upper end of the spindle box 1 through this mounting hole. The output end of the tool-removing cylinder 10 extends into the spindle box 1 through the tool-removing cylinder mounting hole 8 and is used to drive the gripper at the lower end of the spindle 1.

[0043] During machining, the gripper is responsible for holding the tool, while the tool-removing cylinder 10 controls the opening and closing of the gripper to realize the loading and unloading of the tool. This design makes the connection between the tool-removing cylinder 10 and the spindle box tight and reasonable, ensuring the accuracy and stability of the tool loading and unloading action, improving the efficiency of tool replacement during machining, and playing an important role in the smooth progress of the entire machining process.

[0044] like Figures 1-3 As shown, a motor mounting hole 9 is also provided at the upper end of the spindle box housing 1. The motor 11 is mounted at the motor mounting hole 9 through the motor mounting plate 12. The output end of the motor 11 passes through the motor mounting hole 9 and extends into the spindle box housing 1, driving the synchronous pulley 4 to rotate. There are two synchronous pulleys 4, one connected to the output end of the motor and the other connected to the upper end of the spindle. The synchronous pulley 4 transmits power to the spindle through the synchronous belt 5, driving the spindle 3 to rotate. This design ensures the stability and efficiency of power transmission between the motor 11 and the synchronous pulley 4, providing a stable power source for the spindle box and ensuring the stability and accuracy of the machining process.

[0045] In actual machining scenarios, before the equipment starts running, the operator first installs and adjusts the timing pulley 4 and timing belt 5 through the first reserved hole 6 and the second reserved hole 7. After installation, the reserved holes are sealed with the first waterproof cover plate 13 and the second waterproof cover plate 14 to ensure the waterproof performance of the transmission cavity.

[0046] During the processing, the motor 11 starts, and its output end drives the synchronous pulley 4 connected to it to rotate. The power is transmitted to another synchronous pulley 4 through the synchronous belt 5, which in turn drives the spindle 3 to rotate. When it is necessary to change the tool, the tool-changing cylinder 10 is activated, and its output end drives the jaws at the lower end of the spindle 1 to loosen or clamp the tool, thus completing the tool changing operation.

[0047] Throughout the process, the stiffening plate 2 not only provides installation space for the timing pulley 4 and timing belt 5, but also enhances the strength and rigidity of the spindle box 1, reduces the weight of the equipment, and improves the dynamic response effect. Meanwhile, the waterproof design effectively protects the timing belt 5 from corrosion by cutting fluid, reduces equipment failure and maintenance costs, and improves production efficiency.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A waterproof spindle housing structure comprising a spindle housing case (1) and a spindle (3) installed in the spindle housing case (1), characterized by, The inner cavity of the main shaft box body (1) is provided with a rib plate (2) to form a transmission cavity for installing a synchronous pulley (4) and a synchronous belt (5), and the outer part of the main shaft box body (1) is provided with a reserved hole in communication with the transmission cavity for installation and debugging of the synchronous pulley (4) and the synchronous belt (5), and the opening of the reserved hole is sealed by a waterproof cover plate.

2. The waterproof spindle box structure according to claim 1, characterized in that, The rib plate (2) has a plurality of reinforcing ribs staggered with each other, and the rib plate (2) is installed at the lower end of the inner cavity of the main shaft box body (1), and the upper end of the rib plate (2) forms the transmission cavity with the upper wall of the inner cavity of the main shaft box body (1).

3. The waterproof spindle box structure according to claim 2, characterized in that, The reinforcing ribs of the rib plate (2) are provided with round holes.

4. The waterproof spindle box structure according to claim 1, characterized in that, The reserved hole includes a first reserved hole (6) and a second reserved hole (7), and the first reserved hole (6) and the second reserved hole (7) are respectively arranged above one end of the synchronous belt (5) and below the other end of the synchronous belt (5), and the openings of the first reserved hole (6) and the second reserved hole (7) are respectively sealed by a first waterproof cover plate (13) and a second waterproof cover plate (14).

5. The waterproof spindle box structure according to claim 1, wherein The upper end of the main shaft box body (1) is provided with a tool knock-out cylinder mounting hole (8), and the tool knock-out cylinder (10) is installed at the upper end of the main shaft box body (1), and the output end of the tool knock-out cylinder (10) extends into the main shaft box body (1) through the tool knock-out cylinder mounting hole (8) and drives the jaw at the lower end of the main shaft (3) to act.

6. The waterproof spindle-nut box structure according to claim 1, wherein The upper end of the main shaft box body (1) is provided with a motor mounting hole (9), and the motor (11) is installed at the motor mounting hole (9) through a motor mounting plate (12), and the output end of the motor (11) extends into the main shaft box body (1) through the motor mounting hole (9) and drives the synchronous pulley (4) to rotate.

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