Main shaft connecting structure of gantry boring and milling machining center

Abstract

The utility model relates to the technical field of gantry boring and milling machining, and particularly discloses a main shaft connecting structure of a gantry boring and milling machining center. The limiting sleeve is arranged at the peripheral end of a main shaft of the gantry boring and milling machining center in a sleeving manner and is in sliding connection with the shell; the supporting sleeve is arranged in the shell and connected with the limiting sleeve, and the limiting sleeve slides in the axial direction of the limiting sleeve; the oil storage tank is arranged in the shell, and an oil guide channel communicated with the limiting sleeve is arranged at the bottom of the oil storage tank; and the matching assembly comprises a baffle ring arranged on the limiting sleeve and a plurality of matching keys arranged on the main shaft.

Description

Technical Field

[0001] This application relates to the field of gantry boring and milling machining technology, and specifically discloses a spindle connection structure for a gantry boring and milling machining center. Background Technology

[0002] The main functional components of a gantry milling and boring machining center include the CNC system, spindle, motor, drive, leadscrew, guide rails, tool magazine, tilting head, and rotary table. These functional components are the unit technology carriers of the CNC machine tool and determine the overall performance level of the machine tool. Modern manufacturing is developing towards high speed and high precision, and the requirements of manufacturing technology for the machining accuracy and reliability of machine tools are constantly increasing.

[0003] In gantry milling machining, the spindle's rotational accuracy is a key factor determining machining quality. When the spindle's extension stroke is large, the spindle's overhang causes it to bend under its own weight, resulting in poor spindle rotational runout during machining. This leads to tool vibration, resulting in workpieces with significant errors in flatness, roundness, and surface finish. Furthermore, this machining condition reduces tool life. Currently, an effective solution is to manually install a support sleeve to support the extended spindle. However, this method requires frequent disassembly and reassembly of the support sleeve, which is cumbersome and can cause varying degrees of wear on the spindle and other components, affecting their lifespan and machining accuracy. Therefore, this invention provides a spindle connection structure for a gantry milling machining center to solve these problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem that bending occurs when the spindle has a large overhang in traditional gantry milling, which affects the machining accuracy of the workpiece and the service life of the cutting tool.

[0005] To achieve the above objectives, the basic solution of this utility model provides a spindle connection structure for a gantry boring and milling machining center, comprising:

[0006] case;

[0007] A limiting sleeve is fitted onto the circumferential end of the spindle of a gantry milling machining center and is slidably connected to the housing.

[0008] A support sleeve is disposed inside the housing and connected to the limiting sleeve, and the limiting sleeve slides along the axial direction of the limiting sleeve;

[0009] An oil storage tank is located inside the housing, and the bottom of the oil storage tank is provided with an oil guiding channel communicating with the limiting sleeve;

[0010] The mating components include retaining rings respectively provided on the limiting sleeve and several mating keys provided on the main shaft.

[0011] Furthermore, the support sleeve is provided with several guide rods, and the side wall of the limiting sleeve is provided with several connecting holes, with the ends of the guide rods slidably connected in each connecting hole.

[0012] Furthermore, the mating assembly also includes a connecting spring disposed between the bottom of the connecting hole and the end of the guide rod.

[0013] Furthermore, the oil guide channel extends into the interior of the connecting hole.

[0014] Furthermore, it also includes a fixing sleeve disposed on the housing, the limiting sleeve being axially slidably connected to the fixing sleeve, and the oil guide channel passing through the fixing sleeve.

[0015] Furthermore, the oil guiding channel includes:

[0016] The first oil guide hole is located between the inner and outer sides of the fixed sleeve;

[0017] An oil guide groove is provided inside the fixed sleeve and communicates with the first oil guide hole;

[0018] The second oil guide hole is located between the inner and outer sides of the limiting sleeve and communicates with the oil guide groove.

[0019] Furthermore, the retaining ring is slidably connected to the outer wall of the main shaft, and a stepped surface that matches the mating key is formed between the limiting sleeve and the retaining ring.

[0020] The principle and effect of this solution are as follows:

[0021] Compared with the prior art, the limiting sleeve in this utility model is supported by a support sleeve and moves with the spindle of the gantry milling machining center by the mutual cooperation between the retaining ring and the mating key. When the overhang length of the spindle is large, it can limit and support the spindle. The setting of the guide rod and the connecting hole makes the guide rod, the limiting sleeve and the fixed sleeve form a force system. When the end of the spindle and the limiting sleeve that extends out of the housing is subjected to large force, the guide rod and the connecting hole located inside the housing cooperate with each other to prevent the limiting sleeve and the spindle from bending. At the same time, the guide rod also limits the movement of the limiting sleeve. The setting of the spring can not only prevent rigid collision between the guide rod and the limiting sleeve, thus protecting the guide rod and the limiting sleeve, but also help the limiting sleeve return to the inside of the housing. The oil tank and the oil guide channel help to lubricate the mating surface between the limiting sleeve and the spindle, the mating surface between the guide rod and the limiting hole, and the mating surface between the limiting sleeve and the fixed sleeve. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of a spindle connection structure for a gantry milling machining center according to an embodiment of this application is shown. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] The reference numerals in the accompanying drawings include: spindle 1, housing 2, machining shaft 3, limit sleeve 4, fixing sleeve 5, retaining ring 6, mating key 7, oil reservoir 8, support sleeve 9, guide rod 10, and connecting spring 11.

[0026] A spindle connection structure for a gantry boring and milling machining center, implementing, for example... Figure 1 As shown: It includes a housing 2, a limiting sleeve 4 that is slidably connected to the housing 2 and sleeved on the circumference of the spindle 1 of the gantry milling machining center, a support sleeve 9 and a fixing sleeve 5 that are provided inside the housing 2 and support the limiting sleeve 4.

[0027] The support sleeve 9 is fixed inside the housing 2 by a support and bolts, and the fixing sleeve 5 is welded to the wall of the housing 2. Several guide rods 10 are provided on the support sleeve 9, and several connecting holes are provided on the side wall of the limiting sleeve 4. The ends of the guide rods 10 are slidably connected to the connecting holes. The guide rods 10, the limiting sleeve 4, and the fixing sleeve 5 form a force-bearing system. When the end of the main shaft 1 or the limiting sleeve 4 extending out of the housing 2 is subjected to a large force, the guide rods 10 located inside the housing 2 cooperate with the connecting holes to prevent bending of the limiting sleeve 4 and the main shaft 1. Simultaneously, the guide rods 10 also limit the movement of the limiting sleeve 4.

[0028] To drive the mating sleeve to move axially, a mating assembly is also provided, including a retaining ring 6 respectively provided on the limiting sleeve 4, several mating keys 7 provided on the main shaft 1, and a connecting spring 11 provided between the bottom of the connecting hole and the end of the guide rod 10. The retaining ring 6 is fixed to one end of the limiting sleeve 4 by multiple fixing bolts. The retaining ring 6 is slidably connected to the outer wall of the main shaft 1. A stepped surface adapted to the mating keys 7 is formed between the limiting sleeve 4 and the retaining ring 6. The two ends of the connecting spring 11 are respectively fixed to the bottom of the connecting hole and the end of the guide rod 10.

[0029] In order to lubricate and supply oil to the mating surfaces of the limiting sleeve 4 and the main spindle 1, the guide rod 10 and the limiting hole, and the limiting sleeve 4 and the fixed sleeve 5, an oil reservoir 8 and an oil guide channel for circulating oil to the end face of the main spindle 1 are provided in the housing 2. The oil guide channel includes a plurality of first oil guide holes located between the inner and outer sides of the fixed sleeve 5 and communicating with the bottom of the oil reservoir 8, an oil guide groove located inside the fixed sleeve 5 and communicating with the first oil guide holes, and a second oil guide hole located between the inner and outer sides of the limiting sleeve 4 and communicating with the oil guide groove. The second oil guide hole passes through the connecting hole.

[0030] In a gantry milling machining center, the spindle 1 extends out of the housing 2 and connects to the machining axis 3 (e.g., a milling spindle). A limiting sleeve 4 is supported by a support sleeve 9 and moves with the spindle 1 using the interaction between the retaining ring 6 and the mating key 7. When the overhang length of the spindle 1 is large, the limiting sleeve 4 provides both limiting and support, effectively preventing the bending phenomenon that occurs when the spindle 1 has a large overhang length in traditional gantry milling, which affects workpiece machining accuracy and tool life. Furthermore, in this embodiment, the limiting sleeve 4 does not require frequent disassembly, thus avoiding varying degrees of wear on the spindle 1 and other equipment components, which could affect the service life and machining accuracy of these components.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A gantry boring and milling machining center spindle connecting structure, characterized in that, The application relates to a supporting device for a main shaft of a gantry boring and milling machining center. The supporting device comprises a shell, a limiting sleeve sleeved on the peripheral end of the main shaft of the gantry boring and milling machining center and in sliding connection with the shell, a supporting sleeve arranged in the shell and in connection with the limiting sleeve, the limiting sleeve being in axial sliding along the limiting sleeve, an oil storage tank arranged in the shell, the bottom of the oil storage tank being provided with an oil guide channel in communication with the limiting sleeve, and a matching assembly comprising a stop ring arranged on the limiting sleeve and a plurality of matching keys arranged on the main shaft. The supporting sleeve is provided with a plurality of guide rods, the side wall of the limiting sleeve is provided with a plurality of connecting holes, and the ends of the guide rods are in sliding connection with the connecting holes respectively. The matching assembly further comprises connecting springs arranged between the bottoms of the connecting holes and the ends of the guide rods. The oil guide channel extends to the inside of the connecting hole. The supporting device further comprises a fixing sleeve arranged on the shell, the limiting sleeve is in axial sliding connection with the fixing sleeve, and the oil guide channel penetrates through the fixing sleeve.

2. The main shaft connecting structure of a gantry boring and milling machining center according to claim 1, characterized in that, The oil guide channel comprises a first oil guide hole arranged between the inside and the outside of the fixing sleeve, an oil guide groove arranged on the inside of the fixing sleeve and in communication with the first oil guide hole, and a second oil guide hole arranged between the inside and the outside of the limiting sleeve and in communication with the oil guide groove.

3. The main shaft connecting structure of a gantry boring and milling machining center according to claim 2, characterized in that, The stop ring is in sliding connection with the outer wall of the main shaft, and a stepped surface matched with the matching keys is formed between the limiting sleeve and the stop ring.

4. The main shaft connecting structure of a gantry boring and milling machining center according to claim 3, characterized in that, ​ 5. The main shaft connecting structure of a gantry boring and milling machining center according to claim 1, characterized in that, ​ 6. The main shaft connecting structure of a gantry boring and milling machining center according to claim 5, characterized in that, ​ ​ ​ ​ 7. The main shaft connecting structure of a gantry boring and milling machining center according to claim 1, characterized in that, ​

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