Automatic aligning structure for installation of vertical feeding lead screw of surface grinding machine

Abstract

The utility model discloses an automatic aligning structure for mounting a vertical feeding screw rod of a surface grinding machine, which comprises a T-shaped screw rod, the lower part of the T-shaped screw rod is mounted in a bearing seat through an aligning bearing assembly, and the middle upper part of the T-shaped screw rod is mounted in a rolling nut assembly; the self-aligning bearing assembly comprises an upper deep groove bearing and two lower thrust bearings; a screw rod hole and three shaft holes evenly distributed in the screw rod hole in the circumferential direction are formed in a screw cap body of the rolling screw cap assembly, two shaft holes are a front left position and a front right position, one shaft hole is a rear position, a shaft piece is arranged in each shaft hole, and annular gear rings located at the same height position in the screw cap body are installed on the shaft pieces. And each annular gear ring is meshed with a T-shaped lead screw arranged in the lead screw hole in a penetrating manner. Through self-aligning of the bearing and adjustment of the eccentric shaft, the requirement for the parallelism of the lead screw and the guide rail is lowered, and meanwhile the machining difficulty of the parallelism of the inner hole of the stand column and the guide rail can be lowered.

Description

Technical Field

[0001] This utility model relates to the internal structure of a grinding machine, specifically an automatic self-aligning structure for mounting a vertical feed screw on a surface grinder. Background Technology

[0002] Surface grinding is a very important machining method, and surface grinders are one of the most widely used machine tools. They are widely used in various fields of industrial production, with an annual demand of about 8,000 units in China alone.

[0003] The vertical feed mechanism is an important component of a surface grinder. It is responsible for driving the grinding head to move vertically to perform grinding on the workpiece. It plays a vital role in ensuring machining accuracy, improving machining efficiency, enhancing operational convenience, and adapting to diverse machining needs. Utility Model Content

[0004] This utility model proposes an automatic self-aligning structure for mounting the vertical feed screw of a surface grinder. This structure has an automatic self-aligning function, which enables the self-aligning bearing to work normally even when there is an angular error between the shaft and the bearing housing or when the shaft is bent. It can compensate for concentricity errors caused by machining, installation, and shaft deformation, and reduce the impact of angular errors caused by installation errors or shaft deflection on the equipment.

[0005] This utility model relates to an automatic self-aligning structure for mounting the vertical feed screw of a surface grinder. Its technical solution includes a T-shaped screw, but differs in that:

[0006] 1. The lower part of the T-shaped lead screw is installed in the bearing housing through a self-aligning bearing assembly, and the upper middle part of the T-shaped lead screw is installed in the rolling nut assembly.

[0007] 2. The self-aligning bearing assembly includes an upper deep groove bearing and two lower thrust bearings.

[0008] 3. The nut body of the rolling nut assembly is provided with a lead screw hole and three shaft holes evenly distributed around the lead screw hole. Two shaft holes are in the front left and right positions, and one shaft hole is in the rear position. Each shaft hole is provided with a shaft component, and each shaft component is equipped with an annular toothed ring at the same height position inside the nut body. Each annular toothed ring meshes with a T-shaped lead screw passing through the lead screw hole.

[0009] Furthermore, the bearing housing is installed in the inner hole at the lower part of the hollow section at the front of the column, the front end of the nut body is installed on the grinding head seat through the adjusting shim, the grinding head seat is slidably installed on the column through the guide rail pair, the column is installed on the bed, and the lower end of the T-shaped lead screw is connected to the feed reducer installed in the bed through the coupling.

[0010] The beneficial effects of this utility model are:

[0011] 1. The automatic self-aligning structure for the vertical feed screw of the surface grinder of this utility model reduces the parallelism requirements of the T-shaped screw and the guide rail pair by means of the self-aligning of the two thrust bearings and the forward and backward adjustment of the rolling nut assembly. At the same time, it also reduces the machining difficulty of the parallelism between the inner hole of the column and the guide rail pair.

[0012] 2. This utility model has a reasonable design, compact structure, good vibration resistance, large load-bearing capacity, strong impact load resistance, and simple manufacturing process.

[0013] 3. In the structure of this utility model, when the T-shaped lead screw deflects, it can be automatically adjusted without increasing the bearing load.

[0014] 4. The structure of this utility model can compensate for concentricity errors caused by processing, installation, and deformation of the T-shaped lead screw. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0016] Figure 2 for Figure 1 AA sectional view in the implementation method.

[0017] Figure 3 for Figure 2 BB section view in the middle.

[0018] Figure 4 for Figure 2 Enlarged view of point C in the image.

[0019] Figure 5 for Figure 2 , Figure 3 , Figure 4 A schematic diagram of the structure of the rolling nut assembly.

[0020] Figure 6 for Figure 5 Top view.

[0021] Drawing number markings: 1. T-shaped lead screw; 2. Self-aligning bearing assembly; 21. Deep groove bearing; 22. Thrust bearing; 3. Bearing housing; 4. Rolling nut assembly; 41. Housing; 42. Locking nut; 43. Bushing; 44. Bolt shaft; 45. Needle roller bearing; 46. Ring gear; 47. Surface bearing; 48. Adjusting washer; 5. Column; 6. Adjusting shim; 7. Grinding head seat; 8. Bed; 9. Coupling; 10. Feed reducer; 11. Threaded parts; 12. Sliding plate. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the embodiments shown in the accompanying drawings.

[0023] This utility model relates to an automatic self-aligning structure for the vertical feed screw of a surface grinder, comprising a T-shaped screw 1. The T-shaped screw 1 is located in the hollow portion at the front of a column 5, which is mounted on the rear of the bed 8. The lower part of the hollow portion at the front of the column 5 is a bearing seat mounting position with an inner hole. A bearing seat 3 is mounted in the inner hole through upper and lower threaded parts 11. A self-aligning bearing assembly 2 is installed in the bearing seat 3. The self-aligning bearing assembly 2 includes upper, middle, and lower deep groove bearings 21, a first thrust bearing 22, and a second thrust bearing 22. The lower part of the T-shaped screw 1 is installed in the self-aligning bearing assembly 2, and the upper middle part of the T-shaped screw 1 is installed in a rolling nut assembly 4. The rolling nut assembly 4 is aligned, and a vertical slot is opened on the front end face of the column 5. Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown.

[0024] A grinding head seat 7 is provided on the front side of the column 5. The grinding head seat 7 is slidably mounted on the column 5 via a guide rail pair. The guide rail pair includes a sliding plate 12, which is slidably fitted with the left and right sides of the front end of the column 5. The front end face of the rolling nut assembly 4 is mounted on the sliding plate 12 through a slot. An adjusting shim 6 is provided between the mounting surfaces of the rolling nut assembly 4 and the sliding plate 12. Adjusting shims 6 of different thicknesses can change the front and rear positions of the rolling nut assembly 4. Figure 1 , Figure 2 , Figure 3 As shown in the figure.

[0025] The lower end of the T-shaped lead screw 1 passes through the self-aligning bearing assembly 2 and extends below the front part of the column 5 (located above the bed 8). A coupling 9, connected to the feed reducer 10, is located inside the bed 8 opposite the lower end of the T-shaped lead screw 1. The upper end of the coupling 9 extends out of the bed 8 and connects to the T-shaped lead screw 1. Figure 1 , Figure 2 , Figure 4 As shown.

[0026] The rolling nut assembly 4 includes a nut body, which includes upper and lower housings 41. Each housing 41 has a centrally located upper and lower lead screw hole. Three upper and lower shaft holes (distributed at 120° intervals) are also located on the upper and lower housings 41. Two of these shaft holes are positioned left and right in the front position, and one is positioned rear. The T-shaped lead screw 1 is vertically inserted into the upper and lower lead screw holes of the upper and lower housings 41. Shafts are installed in each of the three upper and lower shaft holes on the upper and lower housings 41. Each shaft between the upper and lower housings 41 is equipped with an annular gear ring 46. The three annular gear rings 46 at the same height simultaneously mesh with the T-shaped lead screw 1. Figure 5 , Figure 6 As shown.

[0027] Each shaft component includes a bolt shaft 44, which passes upward through upper and lower bushings 43 located within upper and lower shaft holes. A locking nut 42 is screwed onto the upper end of the bolt shaft 44. An annular gear ring 46 is mounted on the bolt shaft 44 via a needle roller bearing 45. Both ends of the annular gear ring 46 are provided with a plane bearing 47 and an adjusting washer 48. Tightening the locking nut 42 on the bolt shaft 44 presses the upper and lower bushings 43 against the upper and lower housings 41. The upper and lower bushings 43 limit the upper and lower adjusting washers 48, and the upper and lower adjusting washers 48 limit the upper and lower plane bearings 47. The upper and lower plane bearings 47 position the annular gear ring 46. Figure 5 , Figure 6 As shown.

Claims

1. A self-aligning structure for mounting a vertical feed screw on a surface grinder, comprising a T-shaped screw (1), characterized in that: The lower part of the T-shaped lead screw (1) is installed in the bearing seat (3) through the self-aligning bearing assembly (2), and the middle and upper part of the T-shaped lead screw (1) is installed in the rolling nut assembly (4); The self-aligning bearing assembly (2) includes an upper deep groove bearing (21) and two lower thrust bearings (22); The nut body of the rolling nut assembly (4) is provided with a lead screw hole and three shaft holes evenly distributed around the lead screw hole. Two shaft holes are in the front left and right positions, and one shaft hole is in the rear position. Each shaft hole is provided with a shaft member, and each shaft member is equipped with an annular toothed ring (46) at the same height position in the nut body. Each annular toothed ring (46) meshes with the T-shaped lead screw (1) passing through the lead screw hole.

2. The automatic self-aligning structure for mounting the vertical feed screw of a surface grinder according to claim 1, characterized in that: The bearing seat (3) is installed in the inner hole at the lower part of the hollow part at the front of the column (5). The front end of the nut body is installed on the grinding head seat (7) through the adjusting shim (6). The grinding head seat (7) is slidably installed on the column (5) through the guide rail pair. The column (5) is installed on the bed (8). The lower end of the T-shaped lead screw (1) is connected to the feed reducer (10) installed in the bed (8) through the coupling (9).

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