Encoder connecting structure for direct-drive electric screw press

Abstract

The utility model relates to an encoder connecting structure for a direct-drive electric screw press, and belongs to the field of screw press equipment. One end of the encoder shaft is connected with the connecting column through a rigid coupling, and the other end of the encoder shaft is connected with an encoder assembly through a flexible coupling; the end, close to the encoder assembly, of the encoder shaft is rotationally connected with the upper cover, and a rigid and flexible mixed connection mode is adopted between the screw and the encoder assembly, so that the axial rigid impact of the screw on the encoder in the striking process can be reduced, the rotation synchronism of the screw and the encoder can be guaranteed, and the service life of the encoder is prolonged. Therefore, the signal output stability of the encoder is improved, and the forging and pressing accuracy of the screw press is ensured.

Description

Technical Field

[0001] The utility model relates to the field of screw presses, in particular to an encoder connection structure for a direct-drive electric screw press. Background Art

[0002] A screw press is a machine that generates pressure by rotating a set of one or more external and internal bolts within a frame. It is primarily used in the forming of refractory or metal materials. Using a screw and nut as the transmission mechanism, the screw drive converts the forward and reverse rotation of the flywheel into the up and down reciprocating motion of the slider. During operation, an encoder is typically installed on the screw press to provide accurate position feedback and speed control of the slider, thereby improving the performance and stability of the control system. The encoder detects the rotational position and speed of the motor and provides feedback to the control system, enabling precise control as needed. The motor's encoder is typically connected to the screw. Due to the height difference between the screw and the encoder, the screw experiences axial runout during the striking process. This creates a rigid impact between the encoder and the screw, which can easily damage the encoder. This can affect the stability of the encoder's signal output and the accuracy of the screw press's forging process. Utility Model Content

[0003] The existing screw press encoder and screw are generally directly connected in a rigid manner. However, due to the height difference between the screw and the encoder, the screw has axial runout during the striking process. Therefore, this rigid connection method easily causes the encoder to be damaged by rigid impact, affecting the stability of the encoder signal output and the accuracy of the screw press forging. At least one purpose or one aspect of the present application can solve the above problems. Specifically, an encoder connection structure for a direct-drive electric screw press is designed, and the technical solution adopted is as follows:

[0004] An encoder connection structure for a direct-drive electric screw press, comprising:

[0005] Connecting column;

[0006] Encoder shaft, one end of the encoder shaft is connected to the connecting column through a rigid coupling, and the other end is connected to the encoder assembly through a flexible coupling;

[0007] The encoder shaft is rotatably connected to the upper cover at the end close to the encoder assembly.

[0008] Preferably, a positioning sleeve is provided between the encoder shaft and the upper cover, the positioning sleeve is fixed to the upper cover, the upper end of the encoder shaft extends out of the positioning sleeve to connect to the encoder assembly, an angular contact ball bearing is provided in the positioning sleeve, and the encoder shaft is fixed in the positioning sleeve through the angular contact ball bearing.

[0009] Preferably, a pressure cover is provided at the upper end of the positioning sleeve, and a seal is provided between the pressure cover and the encoder shaft.

[0010] Preferably, the sealing element is a skeleton oil seal.

[0011] Preferably, the connecting column includes a shaft body and a connecting portion, the shaft body is connected to the encoder shaft through a rigid coupling, the connecting portion is provided with a connecting hole, a bolt passes through the connecting hole and extends out of the connecting hole.

[0012] The utility model adopts a rigid + flexible hybrid connection method between the screw and the encoder assembly, which not only reduces the axial rigid impact of the screw on the encoder during the striking process, but also ensures the synchronization of the rotation of the screw and the encoder, thereby improving the output stability of the encoder signal and ensuring the accuracy of the screw press forging. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the main view of the utility model;

[0014] Figure 2 yes Figure 1 Cross-sectional view of middle AA;

[0015] Figure 3 This is a diagram showing the state where the application is connected to the screw and fixed to the upper cover.

[0016] In the figure, 1. connecting column, 2. rigid coupling, 3. encoder shaft, 4. positioning sleeve, 5. angular contact ball bearing, 6. pressure cover, 7. flexible coupling, 8. encoder assembly, 9. skeleton oil seal, 10. upper cover, 11. screw. DETAILED DESCRIPTION

[0017] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0018] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] like Figure 1-3Figure 1 shows an encoder connection structure for a direct-drive electric screw press, comprising a connecting column 1, an encoder shaft 3, and an encoder assembly 8. The bottom end of the encoder shaft 3 is connected to the connecting column 1 via a rigid coupling 2, while the connecting column 1 is connected to the top of the screw 11. The top end of the encoder shaft 3 is connected to the encoder assembly 8 via a flexible coupling 7. Near the top end, the encoder shaft 3 is rotationally connected to the upper cover 10 of the screw press.

[0020] The screw press is powered by a flywheel connected to the top of encoder shaft 3, which accelerates its rotation to store energy. This energy drives screw 11, which in turn, and the nut pushes the slider downward. When it contacts the workpiece, this energy is converted into impact energy, which strikes the workpiece and deforms it. After the impact, the screw press's power reverses the flywheel, driving the slider upward and returning to its original position.

[0021] Furthermore, the encoder shaft 3 is rotationally connected to the upper cover 10. Specifically, a positioning sleeve 4 is provided between the encoder shaft 3 and the upper cover 10, and the positioning sleeve 4 is fixed to the upper cover 10 by bolts. The upper end of the encoder shaft 3 extends out of the positioning sleeve 4 to connect the encoder assembly 8. The specific structure of the encoder assembly 8 is the existing technology and will not be described in detail here. The encoder assembly 8 rotates with the rotation of the screw 11, detects the rotation position and speed signal of the motor and feeds back to the control system, so as to obtain the position and speed control of the slider. An angular contact ball bearing 5 is provided in the positioning sleeve 4, and the encoder shaft 3 is fixed in the positioning sleeve 4 through the angular contact ball bearing 5. The angular contact ball bearing 5 can limit the radial movement of the encoder shaft 3, but can move axially. When the screw 11 jumps axially during the striking process, the flexible coupling 7 can absorb and buffer the impact, thereby reducing damage to the encoder assembly 8.

[0022] Furthermore, in order to seal the lubricating grease in the above-mentioned angular contact ball bearing 5 and prevent it from leaking, a pressure cover 6 is provided at the upper end of the above-mentioned positioning sleeve 4, and a seal is provided between the pressure cover 6 and the encoder shaft 3. The seal here adopts a skeleton oil seal 9, which can isolate the lubrication part from the output component to prevent the lubricating oil from leaking.

[0023] Furthermore, the specific structure of the above-mentioned connecting column 1 includes a shaft body and a connecting part. The shaft body is connected to the encoder shaft 3 through a rigid coupling 2. The connecting part is provided with a connecting hole. A bolt passes through the connecting hole and extends out of the connecting hole to connect with the top of the screw 11.

[0024] The above embodiments are preferred embodiments of the present application and cannot be used as limitations on the scope of protection of the present utility model. For those skilled in the art, any equivalent substitutions, improvements, and modifications made to the implementation methods of the present utility model fall within the scope of protection of the present utility model.

Claims

1. An encoder connection structure for a direct-drive electric screw press, characterized in that: include: Connecting column; An encoder shaft, one end of which is connected to the connecting column via a rigid coupling, and the other end of which is connected to the encoder assembly via a flexible coupling; The encoder shaft is rotatably connected to the upper cover at an end close to the encoder assembly.

2. The encoder connection structure for a direct-drive electric screw press according to claim 1, characterized in that: A positioning sleeve is provided between the encoder shaft and the upper cover, the positioning sleeve is fixed to the upper cover, the upper end of the encoder shaft extends out of the positioning sleeve to connect to the encoder assembly, an angular contact ball bearing is provided in the positioning sleeve, and the encoder shaft is fixed in the positioning sleeve through the angular contact ball bearing.

3. The encoder connection structure for a direct-drive electric screw press according to claim 2, characterized in that: A pressure cover is provided at the upper end of the positioning sleeve, and a sealing member is provided between the pressure cover and the encoder shaft.

4. The encoder connection structure for a direct-drive electric screw press according to claim 3, characterized in that: The sealing element is a skeleton oil seal.

5. The encoder connection structure for a direct-drive electric screw press according to claim 1, characterized in that: The connecting column includes a shaft body and a connecting portion. The shaft body is connected to the encoder shaft through a rigid coupling. The connecting portion is provided with a connecting hole. A bolt passes through the connecting hole and extends out of the connecting hole.

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