Spindle box structure and gear milling machine thereof

Abstract

The spindle box structure comprises a spindle box body and a gear milling cutter head, the spindle box body comprises a machine body, a mounting plate arranged on one side of the bottom of the machine body and a transmission box body arranged on the other side of the bottom of the machine body, a channel is formed between the transmission box body and the mounting plate, and a mounting groove penetrating through the transmission box body is formed in the lower end of the transmission box body; the gear milling cutter head is located in the installation groove, penetrating holes are formed in the positions, located on the two sides of the installation groove, of the lower end of the transmission box body, transmission structures are installed in the holes in the two sides respectively, a pin shaft penetrates through the transmission structures on the two sides and the gear milling cutter head, the gear milling cutter head is in connection transmission with the transmission structures, and the gear milling cutter head extends out of the front side and the rear side of the transmission box body. The through mounting groove is formed in the lower portion of the transmission box body of the spindle box body, the gear milling cutter head is mounted in the mounting groove, and the gear milling cutter head extends out of the front side and the rear side of the transmission box body, so that the inner gear ring or the outer gear ring can be machined under the condition that the spindle box is not replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of gear milling machines, in particular to a spindle box structure and a gear milling machine thereof. Background Art

[0002] Gear milling machine is a machine tool used for machining racks, inner gear rings and outer gear rings. Chinese patent document CN2871084Y discloses a polar coordinate CNC multifunctional high-speed gear milling machine. Most of the current gear milling machine equipment adopts this structure. A gear milling cutter is installed on the inner side of the lower end of the spindle box of the equipment. The spindle box structure of this structure can only be used to machine inner gear rings, not outer gear rings.

[0003] Chinese patent document CN101708565A discloses a double-cutter milling gear processing device and a processing method thereof. A milling gear cutter is installed on the outer side of the lower end of the main spindle box of the device. The main spindle box of this structure can only process the outer gear ring, but not the inner gear ring.

[0004] Traditional gear milling machines need to prepare two sets of spindle boxes when processing inner and outer gear rings. The spindle boxes can be replaced to meet processing needs, but the overall replacement of the spindle boxes is rather cumbersome.

[0005] In order to solve the above problems, Chinese patent document CN209754199U discloses an internal and external milling tool holder installation structure and a milling machine tool, which realizes the processing of the inner and outer gear rings by installing a detachable milling tool holder on the lower side of the ram and changing the direction of the milling tool holder. With the above structure, although it is not necessary to prepare two sets of spindle boxes, there is still a problem of cumbersome operation to realize the processing of the inner and outer gear rings by changing the direction of the milling tool holder. Utility Model Content

[0006] The technical problem to be solved by the utility model is: to solve the problems existing in the above-mentioned background technology, to provide a spindle box structure and a gear milling machine thereof, by arranging a penetrating installation groove under the transmission box body of the spindle box body, the gear milling cutter disc is installed in the installation groove, and the gear milling cutter disc extends out of the front and rear sides of the transmission box body, thereby realizing the processing of the inner gear ring and the outer gear ring without replacing the spindle box.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a spindle box structure, including a spindle box body and a milling gear cutter disc, the spindle box body includes a machine body and a mounting plate arranged on one side of the bottom of the machine body and a transmission box body on the other side, a channel is formed between the transmission box body and the mounting plate, the lower end of the transmission box body is provided with a through mounting groove, the milling gear cutter disc is located in the mounting groove, the lower end of the transmission box body is provided with through holes on both sides of the mounting groove, and transmission structures are respectively installed in the holes on both sides, the pin shaft passes through the transmission structure and the milling gear cutter disc on both sides, the milling gear cutter disc is connected to the transmission structure for transmission, and the milling gear cutter disc extends out from the front and rear sides of the transmission box body.

[0008] A reinforcing plate is also arranged at the bottom of the machine body and between the mounting plate and the transmission box body.

[0009] The transmission structure includes a gear, which is installed in the cavity of the transmission case; the side of the gear away from the installation groove is rotatably connected and supported by a bearing and a hole on the side of the transmission case away from the installation groove; the side of the gear close to the installation groove is rotatably sealed and connected to the hole on the side of the transmission case close to the installation groove through a first sealing ring; a protrusion is provided on the side of the gear close to the milling cutter disc, and limiting grooves are respectively provided on both sides of the milling cutter disc at the positions corresponding to the protrusions, and the limiting grooves are inserted into the protrusions to connect the milling cutter disc with the transmission structure for transmission.

[0010] The transmission housing is provided with a first bushing in a hole on a side away from the mounting groove, a bearing is provided in the first bushing, a second bushing is provided on a side away from the mounting groove, a third bushing is provided on a side away from the mounting groove, the second bushing and the third bushing are used to abut against the outer ring and inner ring of the bearing, and a second sealing ring is provided between the second bushing and the third bushing.

[0011] A groove is arranged on one side of the gear close to the milling cutter disc, and the protrusion is installed in the groove by means of bolts.

[0012] A gear milling machine adopts the spindle box structure.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model provides a through installation groove under the transmission housing of the main spindle box body, and the milling cutter disc is installed in the installation groove. The milling cutter disc extends out of the front and rear sides of the transmission housing, so that the inner gear ring or the outer gear ring can be processed without replacing the main spindle box.

[0015] 2. The gear of the utility model is provided with a protrusion on one side of the milling cutter disc, and limiting grooves are respectively provided on both sides of the milling cutter disc at positions corresponding to the protrusions. The limiting grooves are inserted with the protrusions, so that the milling cutter disc is connected to the transmission structure for transmission, which is convenient for disassembly and replacement of the milling cutter disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0019] Figure 3 for Figure 1 Schematic diagram of the AA section structure.

[0020] Figure 4 It is an exploded diagram of the transmission structure of the utility model.

[0021] Figure 5 This is a state diagram of the utility model when processing the outer gear ring.

[0022] Figure 6 This is a state diagram of the utility model when processing the inner gear ring.

[0023] In the figure:

[0024] The main spindle box body 10, the machine body 11, the mounting plate 12, the transmission box 13, the channel 14, the mounting groove 15, the reinforcing plate 16, and the cavity 17;

[0025] Pin 20;

[0026] Milling cutter disc 30, limiting groove 31;

[0027] Transmission structure 40, gear 41, groove 411;

[0028] A first bushing 42, a bearing 43, a second bushing 44, a third bushing 45, a second sealing ring 46, a first sealing ring 47, and a bump 48;

[0029] Outer gear ring 50 , inner gear ring 60 . DETAILED DESCRIPTION

[0030] like Figure 1-4As shown, a spindle box structure includes a spindle box body 10 and a milling gear cutter disc 30, wherein the spindle box body includes a body 11, a mounting plate 12 arranged on one side of the bottom of the body 11, and a transmission box body 13 on the other side, a channel 14 is formed between the transmission box body 13 and the mounting plate 12, the lower end of the transmission box body 13 is provided with a mounting groove 15 penetrating the transmission box body 13, the milling gear cutter disc 30 is located in the mounting groove 15, the lower end of the transmission box body 13 is provided with through holes on both sides of the mounting groove 15, and transmission structures 40 are respectively installed in the holes on both sides, the pin shaft 20 passes through the transmission structure 40 and the milling gear cutter disc 30 on both sides, the milling gear cutter disc 30 is connected with the transmission structure 40 for transmission, and the milling gear cutter disc 30 extends out of the front and rear sides of the transmission box body 13. By setting a penetrating installation groove 15 under the transmission box 13 of the spindle box body 10, the milling cutter disc 30 is installed in the installation groove 15, and the milling cutter disc 30 extends out of the front and rear sides of the transmission box 13, so that the inner gear ring or the outer gear ring can be processed without replacing the spindle box.

[0031] When used, the transmission structure 40 can adopt the transmission structure disclosed in CN101708565 A to realize the rotation of the milling cutter disc 30.

[0032] Furthermore, a reinforcing plate 16 is provided at the bottom of the machine body 11 and between the mounting plate 12 and the transmission housing 13 to improve the structural strength between the mounting plate 12 and the transmission housing 13. Specifically, two reinforcing plates 16 are provided.

[0033] In this embodiment, see Figure 3 The transmission structure 40 includes a gear 41, which is installed in the cavity 17 of the transmission housing 13; the side of the gear 41 away from the installation slot 15 is rotatably connected and supported by a hole on the side of the transmission housing 13 away from the installation slot 15 through a bearing 43; the side of the gear 41 close to the installation slot 15 is rotatably sealed and connected to the hole on the side of the transmission housing 13 close to the installation slot 15 through a first sealing ring 47; a protrusion 48 is provided on the side of the gear 41 close to the milling cutter disc 30, and limiting grooves 31 are respectively provided on both sides of the milling cutter disc 30 at positions corresponding to the protrusions 48, and the limiting grooves 31 are inserted into the protrusions 28, so that the milling cutter disc 30 is connected and transmitted with the transmission structure 40. Through the above structure, it is convenient to replace the milling cutter disc 30.

[0034] When used, in combination with the transmission structure disclosed in CN101708565 A, the gears 41 on both sides are meshed with the turntable gear pairs Z10 on both sides for transmission. The pin 20 passes through the gears 41 on both sides and the milling cutter disc 30, and the pin 20 and the center hole of the gear 41 are interference fit. In this embodiment, see Figure 3 , 4The two end faces of the gear 41 are respectively provided with extension rings, and the extension rings at both ends are respectively connected with the first sealing ring 47 and the bearing 43. The first sealing ring 47 is preferably a skeleton oil seal.

[0035] Furthermore, the transmission housing 13 is provided with a first bushing 42 in a hole away from the mounting groove 15, the bearing 43 is installed in the first bushing 42, the first bushing 42 is provided with a second bushing 44 on the side away from the mounting groove 15, the gear 41 is provided with a third bushing 45 on the side away from the mounting groove 15, the second bushing 44 and the third bushing 45 are used to abut against the outer ring and the inner ring of the bearing 43, and a second sealing ring 46 is also installed between the second bushing 44 and the third bushing 45. Since the bearing is a wearing part and needs to be replaced frequently, repeated disassembly will cause the mounting hole to wear, resulting in the bearing being unable to be installed and fixed later. By providing the first bushing 42, the bearing is not directly connected to the transmission housing 13, and the first bushing 42 can be replaced when the first bushing 42 is worn. The second bushing 44 and the third bushing 45 are used to abut against the outer ring and the inner ring of the bearing 43, and the second sealing ring 46 is used to seal the gap between the second bushing 44 and the third bushing 45 to prevent the lubricating oil inside the transmission housing 13 from leaking. The second sealing ring 46 is preferably a skeleton oil seal.

[0036] See also Figure 3 A groove 411 is provided on one side of the gear 41 close to the milling cutter disc 30, and a projection 48 is installed in the groove 411 by a bolt. After the projection 48 and the limiting groove 31 are tangentially worn, the projection 48 can be easily replaced without replacing the gear 41.

[0037] During installation, first align the limiting groove 31 of the milling cutter disc 30 with the protrusion 48 on the end face of the gear 41 and insert it, then install the milling cutter disc 30 into the installation groove 15, and then pass the pin 20 through the center hole of the gear 41 on one side, then through the center hole of the milling cutter disc 30, and then into the center hole of the gear 41 on the other side.

[0038] Embodiment 2:

[0039] A gear milling machine adopts a spindle box structure described in the embodiment.

[0040] The use process or principle of the utility model is as follows:

[0041] See also Figure 1 Since the diameter of the milling cutter disc 30 is larger than the width between the front and rear sides of the transmission housing 13, the milling cutter disc 30 extends out of the front and rear sides of the transmission housing 13. Figure 5 , 6 , so that the inner gear ring or the outer gear ring can be processed without replacing the spindle box.

Claims

1. A spindle box structure, comprising a spindle box body (10) and a milling cutter disc (30), characterized in that: The spindle box body (10) comprises a machine body (11), a mounting plate (12) arranged on one side of the bottom of the machine body (11) and a transmission box (13) on the other side, a channel (14) being formed between the transmission box (13) and the mounting plate (12), a through mounting groove (15) being arranged at the lower end of the transmission box (13), a milling cutter disc (30) being located in the mounting groove (15), a through hole being arranged at the lower end of the transmission box (13) on both sides of the mounting groove (15), transmission structures (40) being respectively installed in the holes on both sides, a pin shaft (20) passing through the transmission structures (40) and the milling cutter disc (30) on both sides, the milling cutter disc (30) being connected to the transmission structure (40) for transmission, and the milling cutter disc (30) extending out of the front and rear sides of the transmission box (13).

2. A spindle box structure according to claim 1, characterized in that: A reinforcing plate (16) is also provided at the bottom of the machine body (11) and between the mounting plate (12) and the transmission housing (13).

3. A spindle box structure according to claim 1, characterized in that: The transmission structure (40) comprises a gear (41), which is mounted in a cavity (17) of a transmission housing (13); a side of the gear (41) away from the mounting groove (15) is rotatably connected and supported with a hole on a side of the transmission housing (13) away from the mounting groove (15) via a bearing (43); a side of the gear (41) close to the mounting groove (15) is rotatably sealed and connected with a hole on a side of the transmission housing (13) close to the mounting groove (15) via a first sealing ring (47); a protrusion (48) is provided on a side of the gear (41) close to the milling cutter disc (30), and limiting grooves (31) are respectively provided on both sides of the milling cutter disc (30) at positions corresponding to the protrusions (48), and the limiting grooves (31) are inserted into the protrusions (28) so that the milling cutter disc (30) and the transmission structure (40) are connected and transmitted.

4. A spindle box structure according to claim 3, characterized in that: The transmission housing (13) has a first bushing (42) installed in a hole on a side away from the mounting groove (15), the bearing (43) is installed in the first bushing (42), a second bushing (44) is installed on a side of the first bushing (42) away from the mounting groove (15), a third bushing (45) is installed on a side of the gear (41) away from the mounting groove (15), the second bushing (44) and the third bushing (45) are used to abut against the outer ring and inner ring of the bearing (43), and a second sealing ring (46) is also installed between the second bushing (44) and the third bushing (45).

5. A spindle box structure according to claim 3, characterized in that: A groove (411) is provided on one side of the gear (41) close to the milling cutter disc (30), and the protrusion (48) is installed in the groove (411) by means of bolts.

6. A gear milling machine, characterized in that: A spindle box structure according to any one of claims 1 to 5 is adopted.

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