A gap-free encoder transmission device

Abstract

An encoder transmission device with gapless connection belongs to the technical field of machine tool transmission connection parts. The transmission shaft of the present invention is in the shape of a stepped shaft with a small front and a large rear. The interior of the transmission shaft is provided with an axial center step hole with a small front and a large rear. The front end of the transmission shaft is supported by a bearing and installed in the bearing seat, and the bearing seat is relatively fixed to the encoder bracket; the tension sleeve is installed in the axial center step hole and abuts against the step surface, the connecting sleeve is installed in the axial center step hole and bears against the rear end of the tension sleeve, the rear end of the connecting sleeve has a flange portion that matches the rear end surface of the transmission shaft, the connecting sleeve is fixed to the rear end of the transmission shaft by a clamping screw, and the encoder is provided with a mounting shaft portion that extends into the axial center step hole, the mounting shaft portion extends into the axial center step hole and is tightly attached to the mounting shaft portion through the tension sleeve. The present invention occupies a small space, is easy to adjust and maintain, and has a low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tool transmission connection components, and in particular relates to a gap-free connected encoder transmission device. Background Art

[0002] Existing encoders used on machine tools are usually connected to the drive shaft through a connecting structure. This structure requires the cooperation of a connecting key to achieve a tight fit between the encoder and the drive shaft. However, this method is difficult to assemble, and in a long-term working environment, frequent impacts will cause the machine tool displacement accuracy to decrease. Summary of the invention

[0003] In view of the problem that the existing tight-fitting connection structure between the encoder and the transmission shaft achieved by the cooperation of the connecting key causes the displacement accuracy of the machine tool to decrease due to frequent impacts in a long-term working environment, the present invention aims to provide an encoder transmission device with a gapless connection.

[0004] To this end, the present invention adopts the following technical scheme: a gap-free connected encoder transmission device, comprising an encoder and a transmission shaft, characterized in that the encoder transmission device comprises a bearing seat, a tensioning sleeve, and a connecting sleeve. The transmission shaft is in the shape of a stepped shaft with a small front and a large rear. An axial center step hole with a small front and a large rear is arranged inside the transmission shaft. The front end of the transmission shaft is supported and inserted into the bearing seat, and the bearing seat is relatively fixed to the encoder bracket; the tensioning sleeve is inserted into the axial center step hole and abuts against the step surface; the connecting sleeve is inserted into the axial center step hole and bears against the rear end of the tensioning sleeve; the rear end of the connecting sleeve has a flange portion that matches the rear end surface of the transmission shaft; the connecting sleeve is fixed to the rear end of the transmission shaft by a clamping screw; the encoder is provided with a mounting shaft portion that extends into the axial center step hole, the mounting shaft portion extends into the axial center step hole and is tightly abutted against the mounting shaft portion through the tensioning sleeve.

[0005] As a supplement and improvement to the above technical solution, the present invention also includes the following technical features.

[0006] The transmission shaft is connected to the driving shaft through a pulley mechanism, a driving pulley is fixedly sleeved on the rear end of the transmission shaft, a driving pulley is fixedly sleeved on the driving shaft, and the driving pulley and the transmission pulley are connected through a synchronous belt transmission.

[0007] The bearing seat is installed on the encoder bracket by adjusting screws. The adjusting screws pass through the encoder bracket and the bearing seat in the transverse direction. The transverse position of the bearing seat is adjusted by adjusting the screws, thereby adjusting the preload of the synchronous belt to achieve high-precision encoder detection accuracy.

[0008] The transmission shaft is supported and installed in sequence up and down by a front bearing and a rear bearing, and the front bearing and the rear bearing are isolated by a spacer sleeve.

[0009] The driving pulley and the transmission pulley are both toothed pulleys.

[0010] The inner side wall of the tail portion of the driving pulley has a supporting portion surrounding and supporting the outer side of the flange of the connecting sleeve.

[0011] The present invention can achieve the following beneficial effects: 1. The present invention provides an installation shaft portion on the encoder that is tightly matched with a tension sleeve provided in the transmission shaft, and realizes gapless connection between the installation shaft portion and the transmission shaft through the tension sleeve, thereby overcoming the cumbersome precision assembly of the existing machine tools through the connection key and the problem of reduced accuracy caused by the long-term frequent impact movement of the main shaft. The present invention has a compact structure, a relatively simple structure, gapless connection, high-speed transmission of motion accuracy, high long-term operation reliability, small space occupation, convenient adjustment and maintenance, and low cost. 2. The drive pulley of the present invention is gaplessly fastened to the transmission shaft through a clamping screw, and the driving pulley and the drive pulley are gaplessly transmitted through a synchronous belt, thereby realizing high-precision encoder detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure is a cross-sectional view of a gap-free connected encoder transmission device of the present invention.

[0013] Figure 2 This is a partial enlarged view of point A of an encoder transmission device with a gapless connection according to the present invention.

[0014] Figure 3 This is a schematic diagram of a machine tool application of a gap-free encoder transmission device of the present invention. DETAILED DESCRIPTION

[0015] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings. The described embodiments are only for illustration and explanation of the present invention and do not constitute the sole limitation of the present invention.

[0016] like Figure 1-Figure 3As shown, the encoder 1 and the transmission shaft 2 of the present invention are characterized in that the encoder transmission device includes a bearing seat 3, a tensioning sleeve 4, and a connecting sleeve 5. The transmission shaft 2 is in the shape of a stepped shaft with a small front and a large rear. The interior of the transmission shaft 2 is provided with an axial center step hole with a small front and a large rear. The front end of the transmission shaft 2 is supported by a bearing and inserted into the bearing seat 3, and the bearing seat 3 is relatively fixed to the encoder bracket 6; the tensioning sleeve 4 is inserted into the axial center step hole and abuts against it through the step surface, the connecting sleeve 5 is inserted into the axial center step hole and receives and abuts against the rear end of the tensioning sleeve 4, the rear end of the connecting sleeve 5 has a flange portion that matches the rear end surface of the transmission shaft 2, and the connecting sleeve 5 is fixed to the rear end of the transmission shaft 2 by a clamping screw 7, and the encoder 1 is provided with a mounting shaft portion that extends into the axial center step hole, and the mounting shaft portion extends into the axial center step hole and is tightly abutted against the mounting shaft portion through the tensioning sleeve 4.

[0017] The transmission shaft 2 is connected to the driving shaft through a pulley mechanism. The rear end of the transmission shaft is fixedly sleeved with a transmission pulley. The driving shaft is fixedly sleeved with a driving pulley 12. The driving pulley 12 and the transmission pulley 13 are connected through a synchronous belt 14.

[0018] The bearing seat 3 is installed on the encoder bracket 6 by means of an adjusting screw 8. The adjusting screw 8 passes through the encoder bracket 6 and the bearing seat 3 in the transverse direction. The transverse position of the bearing seat 3 is adjusted by means of the adjusting screw 8, thereby adjusting the preload of the synchronous belt 14 to achieve high-precision encoder detection accuracy.

[0019] The transmission shaft 2 is supported and installed in sequence up and down by a front bearing 9 and a rear bearing 10 , and the front bearing 9 and the rear bearing 10 are isolated by a spacer sleeve 11 .

[0020] The driving pulley 12 and the transmission pulley 13 are both toothed pulleys.

[0021] The inner side wall of the tail portion of the driving pulley 13 has a supporting portion surrounding and supporting the outer side of the flange of the connecting sleeve 5 .

[0022] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A gap-free connected encoder transmission device, comprising an encoder (1) and a transmission shaft (2), characterized in that: The encoder transmission device further includes a bearing seat (3), a tension sleeve (4), and a connecting sleeve (5). The transmission shaft (2) is in the shape of a stepped shaft with a smaller front portion and a larger rear portion. An axial center stepped hole with a smaller front portion and a larger rear portion is provided inside the transmission shaft (2). The front end of the transmission shaft (2) is supported and inserted into the bearing seat (3). The bearing seat (3) is relatively fixed to the encoder bracket (6). The tension sleeve (4) is inserted into the axial center stepped hole and abuts against the step surface. The connecting sleeve (5) is inserted into the axial center stepped hole and receives and abuts against the rear end of the tension sleeve (4). The rear end of the connecting sleeve (5) has a flange portion that matches the rear end surface of the transmission shaft (2). The connecting sleeve (5) is fixed to the rear end of the transmission shaft (2) by a clamping screw (7). The encoder (1) is provided with a mounting shaft portion that extends into the axial center stepped hole. The mounting shaft portion extends into the axial center stepped hole and is tightly abutted against the mounting shaft portion through the tension sleeve (4).

2. The encoder transmission device with gapless connection according to claim 1, characterized in that: The transmission shaft (2) is connected to the driving shaft through a pulley mechanism, a driving pulley is fixedly mounted on the rear end of the transmission shaft, a driving pulley (12) is fixedly mounted on the driving shaft, and the driving pulley (12) and the transmission pulley (13) are connected through a synchronous belt (14).

3. The encoder transmission device with gapless connection according to claim 2, characterized in that: The bearing seat (3) is mounted on the encoder bracket (6) via an adjusting screw (8), and the adjusting screw (8) passes through the encoder bracket (6) and the bearing seat (3) in a transverse direction.

4. The encoder transmission device with gapless connection according to claim 3, characterized in that: The transmission shaft (2) is supported and installed in sequence up and down by a front bearing (9) and a rear bearing (10), and the front bearing (9) and the rear bearing (10) are isolated by a spacer sleeve (11).

5. The encoder transmission device with gapless connection according to claim 4, characterized in that: The driving pulley (12) and the transmission pulley (13) are both toothed pulleys.

6. The encoder transmission device with gapless connection according to claim 5, characterized in that: The inner side wall of the tail portion of the driving pulley (13) has a supporting portion surrounding and resting against the outer side of the flange of the connecting sleeve (5).

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