Dual output narrow cutter head

Abstract

The utility model discloses a double output narrow milling head, including the casing, power transmission subassembly and double output subassembly, power transmission subassembly and double output subassembly are sequentially arranged in the casing, and the cavity that is matched with power transmission subassembly and double output subassembly is equipped in the casing. The double output narrow milling head of the design arbitrary length customization only uses a pair of gear transmission to reduce mechanical loss, divides transmission shaft into transmission shaft and input bevel gear shaft, only needs to measure the step distance among transmission bearing sleeve when installing, then grinds transmission spacer ring into the same size with the step, can install, makes equipment assembly more convenient, and when arbitrary length customization, need not change other design, only need to adjust the size of input bevel gear shaft and upper casing.

Description

Technical Field

[0001] This utility model relates to the field of processing equipment, and in particular to a dual-output narrow milling head. Background Technology

[0002] Right-angle milling heads generally refer to transverse milling heads. Transverse milling heads are the most commonly used machine tool accessories among all angle heads, used to expand the machining range of machine tools. They are widely used for large workpieces or products requiring high precision. Transverse milling heads include single-output right-angle milling heads and double-output right-angle milling heads. Existing double-output right-angle milling heads generally have complex structures, limiting their size and preventing them from becoming very narrow. Conventional double-output right-angle narrow milling heads generally use two transmission modes: one is bevel gears combined with multiple spur gears for transmission. This transmission method uses many gears, resulting in high mechanical losses and low cutting volume; the other is direct bevel gear transmission. This transmission method improves kinetic energy transmission and cutting volume, but due to the influence of bevel gears, the head needs to be very wide and large. Regardless of the transmission method, to make the milling head narrower, the common practice is to adjust the gear ratio to create a reduction mode. Therefore, existing narrow milling heads cannot achieve a 1:1 transmission ratio. However, non-1:1 transmission ratios encounter problems such as difficulty in tapping and inaccurate boring positioning during actual machining.

[0003] For example, the existing patent with publication number CN221064583U: A new type of dual-output right-angle milling head has poor rigidity of the transmission gear on one side, resulting in more energy loss due to the transmission of gears. The increased voids in the housing cavity affect the performance and strength. Only a single bearing is used on both sides of the output shaft, resulting in poor cutting performance, poor waterproof sealing, and easy entry of cutting fluid that damages the bearings during the cutting process. Summary of the Invention

[0004] The problem to be solved by this utility model is to propose an improvement or replacement scheme to address the shortcomings of the prior art, especially an improvement or replacement scheme that can make the milling head narrower while maintaining a 1:1 transmission ratio.

[0005] To solve the above problems, the present invention adopts the following solution: A dual-output narrow milling head, characterized in that it includes a housing, a power transmission assembly, and a dual-output assembly, wherein the power transmission assembly and the dual-output assembly are sequentially arranged inside the housing, and the housing has a cavity matching the power transmission assembly and the dual-output assembly; the power transmission assembly includes a drive shaft, an input bevel gear shaft, an output bevel gear, an input helical gear, and an output helical gear; one end of the input bevel gear shaft is fixedly provided with a bevel gear, and the other end is fixedly connected to the drive shaft; a transmission bearing sleeve is provided on the outer side of the drive shaft and the input bevel gear shaft, and the transmission bearing sleeve is fixedly connected to the housing; both the upper and lower ends of the drive shaft and the input bevel gear shaft assembly are movably connected to the transmission bearing sleeve through bearings; the input helical gear is fixedly arranged inside the housing through a shaft, and the output bevel gear is fixedly arranged on the shaft of the input helical gear, meshing with the bevel gear on the input bevel gear shaft; the output helical gear is fixedly arranged on the dual-output assembly, and meshing with the input helical gear; a cavity is provided in the center of the input bevel gear shaft, and the size and installation position of the input helical gear are matched with the cavity, allowing the input helical gear to rotate freely in the cavity.

[0006] Furthermore, the dual-output narrow milling head is characterized in that a transmission spacer is sleeved on the outer side of the combination of the transmission shaft and the input bevel gear shaft, between the upper and lower bearings.

[0007] Furthermore, the dual-output narrow milling head is characterized in that the end of the drive shaft is provided with a boss, the input bevel gear shaft is provided with a mounting groove that matches the boss, the boss is provided with a positioning groove and a positioning block is provided inside, the inner wall of the mounting groove is provided with a sliding groove that matches the positioning block, the shaft wall of the input bevel gear shaft is provided with a threaded hole, the shaft wall of the drive shaft is provided with a mounting hole that matches the threaded hole, and the drive shaft and the input bevel gear are connected by screws after docking.

[0008] Furthermore, the dual-output narrow milling head is characterized in that the input helical gear and its shaft are designed as a single unit, the shaft of the input helical gear is provided with a mounting step for mounting the output bevel gear, the mounting step is provided with a threaded hole, the output bevel gear is provided with a matching mounting hole, the output bevel gear is fitted into the mounting step and fixed by screws, and the two ends of the shaft of the input helical gear are movably connected to the housing by bearings.

[0009] Furthermore, the dual-output narrow milling head is characterized in that the dual-output assembly includes a spindle, a screw, a front end cover, a rear end cover, a spindle spacer, and bearings; the spindle and the input helical gear are arranged parallel to each other, the spindle has a bidirectional cutter head mounting cavity, the screw is set in the bidirectional cutter head mounting cavity for mounting milling cutter heads; symmetrical positioning grooves are provided on the outer side of the spindle, positioning blocks are set in the positioning grooves, the output helical gear has a sliding groove matching the positioning block, and the output helical gear is fixedly sleeved on the outer side of the spindle by the positioning block; multiple bearings are provided on the side of the spindle away from the output bevel gear and are movably connected to the housing, the bearings abut against the output helical gear for limiting, and the outer side of the bearings is sealed and fixed by a front end cover sleeved on the spindle; at least one bearing is provided on the side of the spindle near the output bevel gear according to the size of the output bevel gear and is movably connected to the housing, a spindle spacer is provided between the bearing and the output bevel gear, the bearing and the spindle spacer abut against the output helical gear for limiting, and the outer side of the bearing is sealed and fixed by a rear end cover sleeved on the spindle. Two keyways are provided at each end of the spindle for assembling key blocks of different qualities as needed.

[0010] Furthermore, the dual-output narrow milling head is characterized in that the housing is divided into an upper housing and a lower housing from the position where the input helical gear is installed. The thick wall of the lower housing is provided with a threaded hole, and the upper housing is provided with a screw mounting window at the corresponding position. The upper housing and the lower housing are fixedly connected by screws.

[0011] Furthermore, the dual-output narrow milling head is characterized in that a dustproof ring is provided between the front cover and the bearing, and between the rear cover and the bearing, and the dustproof ring is provided with at least two dustproof grooves. The front cover and the rear cover are provided with matching dustproof grooves, and the two together form a labyrinth waterproof groove.

[0012] Furthermore, the dual-output narrow milling head is characterized in that a spindle bearing sleeve is matched to the bearing on the side of the spindle away from the output bevel gear, and the spindle bearing sleeve has a Z-shaped structure; one side of the spindle bearing sleeve holds the bearing, and the other side is turned out of the outer side of the housing and fixedly connected to the housing by screws.

[0013] Furthermore, the dual-output narrow milling head is characterized in that: a cornice is provided on the side of the spindle away from the output bevel gear, the cornice abutting against the dustproof ring; the front end cover is fixedly connected to the housing by screws; a threaded locking nut is provided on the side of the spindle near the output bevel gear, the dustproof ring, bearing, spindle spacer, output helical gear, and spindle are locked and fixed by the locking nut; the rear end cover is provided on the outside of the locking nut, and the rear end cover is fixedly connected to the housing by screws; a matching dustproof groove is provided between the front end cover and the cornice, and a dustproof sealing ring is provided in the dustproof groove; a matching dustproof groove is provided between the rear end cover and the locking nut, and a dustproof sealing ring is provided in the dustproof groove.

[0014] A main shaft spacer is fitted on the outer side of the drive shaft and input bevel gear shaft assembly, between the upper and lower bearings. This not only provides support for the drive shaft and input bevel gear shaft, increasing structural strength, but also positions the bearings on both sides, preventing bearing displacement.

[0015] The technical effects of this utility model are as follows: 1. Custom length can be achieved by using only one pair of gears to reduce mechanical loss. The transmission shaft is divided into a transmission shaft and an input bevel gear shaft. During installation, it is only necessary to measure the step distance in the transmission bearing sleeve and then grind the transmission spacer to the same size as the step for installation. This makes the equipment assembly more convenient. At the same time, when custom length is achieved, no other design changes are required. Only the dimensions of the input bevel gear shaft and the upper housing need to be adjusted.

[0016] 2. The input helical gear located in the middle for kinetic energy transmission adopts a double-sided load-bearing design, with its two ends being movably connected to the housing through bearings. Compared with the single-sided load-bearing design, it has higher structural strength and transmission stability.

[0017] 3. The main output end of the dual-output assembly is equipped with multiple bearings. The space for installing bearings at the other end is limited due to the influence of the output bevel gear. To improve structural strength and stability, a spindle spacer is installed between the bearings and the output helical gear. In this design, the bearings between the drive shaft, the input bevel gear shaft assembly and the drive bearing sleeve, the bearing between the input helical gear and the housing, and the bearing between the spindle and the housing are all angular contact ball bearings.

[0018] 4. The dustproof ring has at least two dustproof grooves, and the front and rear covers have matching dustproof grooves. The combination of the two forms a labyrinth waterproof groove. The labyrinth waterproof groove design can effectively prevent milling dust and cooling cutting fluid from entering the milling head and causing damage.

[0019] 5. To adjust accuracy, a spindle bearing sleeve is designed at the spindle bearing. To adjust the center of gravity of the dual-output narrow milling head, two keyways are provided at each end of the spindle, allowing for the assembly of key blocks of different weights as needed, so that the center of gravity can be adjusted even after the entire narrow milling head is assembled. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a dual-output narrow milling head structure.

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of a dual-output narrow milling head.

[0022] Figure 3 This is a schematic diagram of the power transmission component.

[0023] Figure 4 This is a schematic diagram of the cross-section of the dual-output component.

[0024] Figure 5 This is a cross-sectional view of the output bevel gear and the input helical gear.

[0025] Figure 6 This is a cross-sectional view of the main spindle and output helical gear installation.

[0026] Among them, 1 is the housing, 2 is the power transmission assembly, 3 is the dual output assembly, 4 is the key block, 5 is the bearing, 11 is the upper housing, 12 is the lower housing, 21 is the drive shaft, 22 is the input bevel gear shaft, 23 is the transmission spacer, 24 is the transmission bearing sleeve, 25 is the output bevel gear, 26 is the input helical gear, 27 is the output helical gear, 31 is the main shaft, 32 is the screw, 33 is the front cover, 34 is the rear cover, 35 is the lock nut, 36 is the dustproof spacer, 37 is the main shaft spacer, and 38 is the main shaft bearing sleeve. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] Example: Figure 1 As shown, a dual-output narrow milling head includes a housing, a power transmission assembly, and a dual-output assembly. The power transmission assembly and the dual-output assembly are sequentially arranged inside the housing, which has cavities that match the power transmission assembly and the dual-output assembly. The power transmission assembly includes a drive shaft, an input bevel gear shaft, an output bevel gear, an input helical gear, and an output helical gear. One end of the input bevel gear shaft is fixedly fitted with a bevel gear, and the other end is fixedly connected to the drive shaft. A transmission bearing sleeve is provided on the outer side of the drive shaft and the input bevel gear shaft, and the transmission bearing sleeve is fixedly connected to the housing. Both the upper and lower ends of the drive shaft and the input bevel gear shaft assembly are movably connected to the transmission bearing sleeve through bearings. The input helical gear is fixedly mounted inside the housing via a shaft, and the output bevel gear is fixedly mounted on the shaft of the input helical gear, meshing with the bevel gear on the input bevel gear shaft. The output helical gear is fixedly mounted on the dual-output assembly, meshing with the input helical gear. A cavity is provided in the center of the input bevel gear shaft, and the size and installation position of the input helical gear match the cavity, allowing the input helical gear to rotate freely within the cavity. A transmission spacer is fitted on the outer side of the drive shaft and input bevel gear shaft assembly, between the upper and lower bearings.

[0029] like Figure 2 , Figure 3 , Figure 5As shown, the drive shaft has a boss at its end, and the input bevel gear shaft has a mounting groove that matches the boss. The boss has a positioning groove with a positioning block inside. The inner wall of the mounting groove has a sliding groove that matches the positioning block. The input bevel gear shaft has a threaded hole, and the drive shaft has a mounting hole that matches the threaded hole. The drive shaft and input bevel gear are connected by screws after mating. The input helical gear and its shaft are designed as a single unit. The input helical gear shaft has a mounting step for mounting the output bevel gear, and the mounting step has a threaded hole. The output bevel gear has a matching mounting hole. The output bevel gear is fitted into the mounting step and fixed by screws. The two ends of the input helical gear shaft are movably connected to the housing via bearings.

[0030] like Figure 4 , Figure 6 As shown, the dual-output assembly includes a spindle, a screw, a front cover, a rear cover, a spindle spacer, and bearings. The spindle and the input helical gear shaft are arranged parallel to each other. The spindle has a bidirectional cutter head mounting cavity, and the screw is located in the bidirectional cutter head mounting cavity for mounting milling cutter heads. Symmetrical positioning grooves are provided on the outer side of the spindle, and positioning blocks are set in the positioning grooves. The output helical gear has a sliding groove that matches the positioning block, and the output helical gear is fixedly sleeved on the outer side of the spindle by the positioning block. Multiple bearings are provided on the side of the spindle away from the output bevel gear and are movably connected to the housing. The bearings abut against the output helical gear for limiting, and the outer side of the bearings is sealed and fixed by a front cover sleeved on the spindle. On the side of the spindle near the output bevel gear, at least one bearing is provided according to the size of the output bevel gear and is movably connected to the housing. A spindle spacer is provided between the bearing and the output bevel gear. The bearing and the spindle spacer abut against the output helical gear for limiting, and the outer side of the bearing is sealed and fixed by a rear cover sleeved on the spindle. Two keyways are provided at each end of the spindle for assembling key blocks of different weights as required.

[0031] A dustproof ring is provided between the front cover and the bearing, and between the rear cover and the bearing. The dustproof ring has at least two dustproof grooves. The front cover and the rear cover have matching dustproof grooves. The two together form a labyrinthine waterproof groove. A spindle bearing sleeve is matched to the bearing on the side of the spindle away from the output bevel gear. The spindle bearing sleeve has a Z-shaped structure. One side of the spindle bearing sleeve holds the bearing, and the other side is turned out of the outer side of the housing and fixed to the housing with screws. The main shaft has an eave on the side away from the output bevel gear, which abuts against the dustproof ring. The front cover is fixed to the housing with screws. A threaded lock nut is provided on the side of the main shaft near the output bevel gear, which locks and fixes the dustproof ring, bearing, main shaft spacer, output helical gear, and main shaft. The rear cover is placed on the outside of the lock nut and is fixed to the housing with screws. There are matching dustproof grooves between the front cover and the eave, and dustproof sealing rings are installed in the dustproof grooves. There are matching dustproof grooves between the rear cover and the lock nut, and dustproof sealing rings are installed in the dustproof grooves.

Claims

1. A dual-output narrow milling head, characterized in that, The device includes a housing, a power transmission assembly, and a dual-output assembly. The power transmission assembly and the dual-output assembly are sequentially arranged within the housing, which has cavities that match the power transmission assembly and the dual-output assembly. The power transmission assembly includes a drive shaft, an input bevel gear shaft, an output bevel gear, an input helical gear, and an output helical gear. One end of the input bevel gear shaft is fixedly fitted with a bevel gear, and the other end is fixedly connected to the drive shaft. A transmission bearing sleeve is provided on the outer side of the drive shaft and the input bevel gear shaft, and the transmission bearing sleeve is fixedly connected to the housing. Both the upper and lower ends of the drive shaft and the input bevel gear shaft assembly are movably connected to the transmission bearing sleeve via bearings. The input helical gear is fixedly mounted inside the housing via a shaft, and the output bevel gear is fixedly mounted on the shaft of the input helical gear, meshing with the bevel gear on the input bevel gear shaft. The output helical gear is fixedly mounted on the dual-output assembly, meshing with the input helical gear. A cavity is provided in the center of the input bevel gear shaft, and the size and installation position of the input helical gear match the cavity, allowing the input helical gear to rotate freely within the cavity.

2. The dual-output narrow milling head according to claim 1, characterized in that, A transmission spacer is fitted on the outer side of the drive shaft and input bevel gear shaft assembly, between the upper and lower bearings.

3. The dual-output narrow milling head according to claim 1, characterized in that, The drive shaft has a boss at its end, and the input bevel gear shaft has a mounting groove that matches the boss. The boss has a positioning groove with a positioning block inside. The inner wall of the mounting groove has a sliding groove that matches the positioning block. The shaft wall of the input bevel gear shaft has a threaded hole, and the shaft wall of the drive shaft has a mounting hole that matches the threaded hole. The drive shaft and the input bevel gear are connected by screws after docking.

4. The dual-output narrow milling head according to claim 1, characterized in that, The input helical gear and its shaft are designed as a single unit. The shaft of the input helical gear is provided with a mounting step for mounting the output bevel gear. The mounting step is provided with a threaded hole, and the output bevel gear is provided with a matching mounting hole. After the output bevel gear is fitted into the mounting step, it is fixed by screws. The two ends of the shaft of the input helical gear are movably connected to the housing through bearings.

5. The dual-output narrow milling head according to claim 1, characterized in that, The dual-output assembly includes a spindle, a screw, a front cover, a rear cover, a spindle spacer, and bearings. The spindle and the input helical gear are arranged parallel to each other. The spindle has a bidirectional cutter head mounting cavity, and the screw is located in the bidirectional cutter head mounting cavity. The outer side of the spindle has symmetrical positioning grooves, and positioning blocks are set in the positioning grooves. The output helical gear has a sliding groove that matches the positioning block. The output helical gear is fixedly sleeved on the outer side of the spindle by the positioning block and meshes with the input helical gear. Multiple bearings are set on the side of the spindle away from the output bevel gear and are movably connected to the housing. The bearings abut against the output helical gear for limiting. The outer side of the bearings is sealed and fixed by a front cover sleeved on the spindle. On the side of the spindle near the output bevel gear, at least one bearing is set according to the size of the output bevel gear and is movably connected to the housing. A spindle spacer is set between the bearing and the output bevel gear. The bearing and the spindle spacer abut against the output helical gear for limiting. The outer side of the bearing is sealed and fixed by a rear cover sleeved on the spindle.

6. The dual-output narrow milling head according to claim 1, characterized in that, The housing is divided into an upper housing and a lower housing from the position where the input helical gear is installed. The thick wall of the lower housing has a threaded hole, and the upper housing has a screw mounting window at the corresponding position. The upper housing and the lower housing are fixedly connected by screws.

7. The dual-output narrow milling head according to claim 5, characterized in that, A dustproof ring is provided between the front cover and the bearing, and between the rear cover and the bearing. The dustproof ring has at least two dustproof grooves. The front cover and the rear cover have matching dustproof grooves. The two are combined to form a labyrinth waterproof groove.

8. The dual-output narrow milling head according to claim 5, characterized in that, The main spindle is fitted with a main spindle bearing sleeve on the side of the main spindle away from the output bevel gear. The main spindle bearing sleeve has a Z-shaped structure. One side of the main spindle bearing sleeve holds the bearing, and the other side is turned out of the outer side of the housing and fixed to the housing with screws.

9. The dual-output narrow milling head according to claim 5, characterized in that, Two keyways are provided at each end of the spindle for assembling key blocks of different qualities as needed.

10. The dual-output narrow milling head according to claim 7, characterized in that, The main shaft has an eave on the side away from the output bevel gear, which abuts against the dustproof ring. The front cover is fixed to the housing with screws. A threaded lock nut is provided on the side of the main shaft near the output bevel gear, which locks and fixes the dustproof ring, bearing, main shaft spacer, output helical gear, and main shaft. The rear cover is placed on the outside of the lock nut and is fixed to the housing with screws. There are matching dustproof grooves between the front cover and the eave, and dustproof sealing rings are installed in the dustproof grooves. There are matching dustproof grooves between the rear cover and the lock nut, and dustproof sealing rings are installed in the dustproof grooves.

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