Hydraulic drive ball screw pair feeding device of surface grinding machine

Abstract

The utility model discloses a surface grinding machine hydraulic drive ball screw pair feeding device which comprises a grinding head body installed on a carriage in a sliding mode, and a manual feeding mechanism and an automatic feeding mechanism are arranged at the front end and the rear end of the carriage respectively. The manual feeding mechanism comprises a hand wheel, a push-pull rod and a bearing assembly, the push-pull rod is installed in an inner bearing sleeve of the bearing assembly, a key and a key groove are in sliding fit between the push-pull rod and the inner bearing sleeve, and the hand wheel is installed on the inner bearing sleeve; the automatic feeding mechanism comprises a driving shaft arranged in a gear box, a large gear I and a small gear I are mounted on the driving shaft, an oil motor connected with the driving shaft is mounted on the gear box, a sliding gear shaft is arranged in the gear box, the gear shaft is connected with the push-pull rod through a transmission rod, and a small gear II capable of being meshed with and separated from the large gear I is arranged on the gear shaft; a ball screw is arranged between the gear box and the grinding head body, the ball screw is installed in the gear box, a large gear II meshed with the small gear I is installed on the ball screw, and a nut screwed with the ball screw is installed on the grinding head body.

Description

Technical Field

[0001] This utility model relates to surface grinding equipment, specifically a hydraulically driven ball screw pair feed device for a surface grinder. Background Technology

[0002] A surface grinder is a precision grinding machine used to process flat surfaces. It is widely used in various fields of industrial production, such as precision grinding in the manufacturing of molds, measuring tools, bearings, automobiles, ships, and aircraft.

[0003] The transverse feed mechanism of the grinding head is one of the key components, and it is an important component that affects the processing efficiency and processing quality. It plays a very important role in achieving precision grinding, high-precision dimensional machining, and online error compensation.

[0004] Excessive transverse feed will result in excessive surface roughness during grinding, while insufficient feed will affect processing efficiency. It also features automatic switching between rough grinding, fine grinding, and no-feed grinding cycles.

[0005] Therefore, a reasonable transverse feed mechanism is crucial, as it has a significant impact on machining quality and efficiency. It is particularly suitable for grinding high-precision, high-surface-finish parts or tools and has high grinding efficiency. Utility Model Content

[0006] In view of the requirements of the prior art, the technical problem to be solved by this utility model is to provide a hydraulically driven ball screw pair feed device for a surface grinder that is accurate in feed, has high torque, strong load-bearing capacity, and is stable and reliable.

[0007] A hydraulically driven ball screw feed device for surface grinders that can solve the problems of existing technologies includes a grinding head body mounted on a slide via forward and backward guide rails. The difference is that:

[0008] 1. The front and rear ends of the slide are respectively equipped with a manual feeding mechanism and an automatic feeding mechanism.

[0009] 2. The manual feed mechanism includes a handwheel, a push-pull rod, and a bearing assembly installed in the base. The push-pull rod is installed in the inner bearing sleeve of the bearing assembly. A key and a keyway are slidably fitted between the push-pull rod and the inner bearing sleeve. The handwheel is installed on the inner bearing sleeve.

[0010] 3. The automatic feeding mechanism includes a drive shaft located inside a gearbox. A large gear I and a small gear I are mounted on the drive shaft. An oil motor connected to the drive shaft is mounted on the gearbox. A gear shaft that can slide forward and backward is provided inside the gearbox. The front end of the gear shaft is connected to the push-pull rod through a transmission rod. A lever that can touch the oil motor switch is installed on the rear end of the gear shaft. A small gear II that can mesh and disengage with the large gear I is provided on the gear shaft.

[0011] 4. A ball screw drive pair is provided between the gearbox and the grinding head body. The ball screw drive pair includes a nut screwed onto the ball screw. The rear part of the ball screw is installed in the gearbox. A large gear II that meshes with the small gear I is installed on the rear part of the ball screw. The nut is installed on the grinding head body.

[0012] 5. Pull the push-pull lever forward to the manual position, and the small gear II meshes with the large gear I (the lever stops the hydraulic motor) to achieve manual feed; push the push-pull lever backward to the automatic position, and the small gear II disengages from the large gear I (the lever starts the hydraulic motor) to achieve hydraulically driven automatic feed.

[0013] Furthermore, the gear shaft is provided with two annular slots, one in the front and one in the rear. The gearbox is provided with retaining beads that can engage with each annular slot when the gear is elastically returned. The positions of the two annular slots correspond to the manual and automatic positions of the push-pull rod, respectively.

[0014] The beneficial effects of this utility model are:

[0015] This utility model presents a hydraulically driven ball screw feed device for a surface grinder. It features a reasonable structure, sensitive and precise feed, good stability, large torque, and strong load-bearing capacity. It is suitable for harsh environments, has high reliability, and is not easily affected by external interference. The manual feed adopts a two-stage gear transmission, which is lightweight, flexible, low-noise, and high-precision, meeting the requirements of high-precision transmission, with high efficiency and high machining accuracy.

[0016] 1. The automatic feed of this utility model is driven by a hydraulic motor, which has a large and continuous torque output, making it suitable for occasions requiring high torque, high load and heavy load.

[0017] 2. This utility model allows for easy adjustment of the speed and torque of the hydraulic motor through a hydraulic system to meet the working requirements of different operating conditions.

[0018] 3. The hydraulic drive system of this utility model has a simple structure, high reliability, strong durability, good sealing performance, is not easily affected by external interference, and is adaptable to harsh working conditions.

[0019] 4. The drive of this utility model adopts a hydraulic motor. Due to its simple structure and lack of sliding parts, it is more durable and performs well in harsh environments such as high temperature and high humidity.

[0020] 5. The drive of this utility model adopts a hydraulic motor, which has stable output and high speed servo accuracy, and can be applied to rotation control under various working conditions.

[0021] 6. The transverse feed of the grinding head of this utility model is driven by a hydraulic motor, and can also be manually fed. The switching between manual and automatic feed is convenient and flexible, which can meet the processing requirements of different working conditions. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0023] Figure 2 for Figure 1 A schematic diagram of the transverse feed transmission in the implementation method.

[0024] Part Number Identification: 1. Slide plate; 2. Grinding head body; 3. Manual feed mechanism; 31. Handwheel; 32. Push-pull rod; 33. Inner bearing sleeve; 34. Key; 4. Automatic feed mechanism; 41. Gearbox; 42. Drive shaft; 43. Large gear I; 44. Small gear I; 45. Gear shaft; 46. Small gear II; 47. Large gear II; 5. Hydraulic motor; 6. Ball screw transmission pair; 61. Ball screw; 62. Nut; 7. Transmission rod; 8. Pulley; 9. Clamping ball; 10. Coupling sleeve. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the embodiments shown in the accompanying drawings.

[0026] This utility model relates to a hydraulically driven ball screw feed device for a surface grinder, comprising a manual feed mechanism 3 located at the front end of a slide 1 and an automatic feed mechanism 4 located at the rear end. The manual feed mechanism 3 and the automatic feed mechanism 4 are connected by a transmission rod 7. The slide 1 has two guide rail pairs (forward and backward) on the left and right sides, and a grinding head body 2 is slidably mounted on the left and right guide rail pairs. The grinding head body 2 is connected to the automatic feed mechanism 4 via a ball screw transmission pair 6. Figure 1 As shown.

[0027] The manual feed mechanism 3 includes a handwheel 31 (with a dial), a push-pull rod 32, and a bearing assembly. The bearing assembly includes an inner bearing sleeve 33 and an outer bearing sleeve housed within a bearing hole in the base. Front and rear rolling bearings are provided between the inner bearing sleeve 33 and the outer bearing sleeve. The handwheel 31 is coaxially mounted on the rear end face of the inner bearing sleeve 33. The push-pull rod 32 passes through the inner bearing sleeve 33 and the handwheel 31, and is slidably mounted within the inner bearing sleeve 33. A key 34 and a keyway are provided between the push-pull rod 32 and the inner bearing sleeve 33 for sliding engagement. A handle is installed at the front end of the push-pull rod 32. Figure 1 , Figure 2 As shown.

[0028] The automatic feeding mechanism 4 includes a drive shaft 42 mounted in a gearbox 41 via front and rear rolling bearings. A small gear I 44 and a large gear I 43 are coaxially mounted on the front of the drive shaft 42. A hydraulic motor 5 is mounted on the rear end face of the gearbox 41 corresponding to the drive shaft 42, and the output shaft of the hydraulic motor 5 is coaxially connected to the rear end of the drive shaft 42. Parallel to the drive shaft 42 and on one side of the drive shaft 42, a gear shaft 45 is provided in the gearbox 41, which can slide forward and backward. A small gear II 46, which can mesh and disengage with the large gear I 43, is coaxially mounted on the gear shaft 45. A lever 8, extending beyond the rear end face of the gearbox 41, is coaxially mounted on the rear end of the gear shaft 45. The position of the lever 8 corresponds to the switch of the hydraulic motor 5. Figure 1 , Figure 2 As shown.

[0029] The gear shaft 45 is positioned directly opposite the push-pull rod 32. The transmission rod 7 is located between the gear shaft 45 and the push-pull rod 32. The front end of the gear shaft 45 (extending beyond the front end face of the gearbox 41) is connected to the rear end of the transmission rod 7 via a coupling sleeve 10. The blind hole at the front end of the transmission rod 7 is coaxially sleeved with the rear end of the push-pull rod 32 and connected by a radially through-hole pin. Figure 2 As shown.

[0030] The ball screw drive pair 6 is parallel to the drive shaft 42 and located on the other side of the drive shaft 42. A nut 62 is screwed onto the ball screw 61 of the ball screw drive pair 6. The rear part of the ball screw 61 is mounted in the gearbox 41 through front and rear rolling bearings. A large gear II 47 that meshes with the pinion I 44 is coaxially mounted on the rear part of the ball screw 61. The nut 62 is mounted on the grinding head body 2. Figure 1 , Figure 2 As shown.

[0031] The operation mode of this utility model is as follows:

[0032] 1. When manual feeding is required (such as for workpiece tool setting), pull the push-pull rod 32 forward using the handle. The push-pull rod 32 pulls the gear shaft 45 forward to the manual position via the transmission rod 7. In the manual position, the small gear II 46 on the gear shaft 45 meshes with the large gear I 43. At this time, the lever 8 disengages from the switch of the oil motor 5 and stops the oil motor 5. Turning the handwheel 31 drives the small gear II 46 on the gear shaft 45 to rotate, which drives the ball screw 61 to rotate through the secondary gear transmission. The nut 62 moves forward and backward on the ball screw 61, which drives the grinding head body 2 to perform forward and backward lateral manual feeding along the left and right guide rail pairs.

[0033] 2. When automatic feed is required (such as during grinding), push the push-pull rod 32 backward by pulling the handle. The push-pull rod 32 pushes the gear shaft 45 backward to the automatic position through the transmission rod 7. In the automatic position, the small gear II 46 on the gear shaft 45 disengages from the large gear I 43. At this time, the lever 8 triggers the switch of the oil motor 5 and starts the oil motor 5. The oil motor 5 runs, thereby driving the small gear I 44 on the drive shaft 42 to rotate. Through the first-stage gear transmission, it drives the ball screw 61 to rotate. The nut 62 moves forward and backward on the ball screw 61, thereby driving the grinding head body 2 to perform forward and backward lateral automatic feed along the left and right guide rail pairs.

[0034] The gear shaft 45 has two annular slots, one at the front and one at the rear. The top of the gearbox 41 has retaining beads 9 that engage with the annular slots when the gears spring back downwards. The positions of the two annular slots correspond to the manual and automatic positions of the push-pull rod 32, respectively. Figure 2 As shown.

Claims

1. A hydraulically driven ball screw feed device for a surface grinder, comprising a grinding head body (2) mounted on a slide (1) via forward and backward guide rails, characterized in that: The front and rear ends of the slide (1) are respectively provided with a manual feeding mechanism (3) and an automatic feeding mechanism (4); The manual feed mechanism (3) includes a handwheel (31), a push-pull rod (32), and a bearing assembly installed in the base. The push-pull rod (32) is installed in the inner bearing sleeve (33) of the bearing assembly. A key (34) and a keyway are slidably fitted between the push-pull rod (32) and the inner bearing sleeve (33). The handwheel (31) is installed on the inner bearing sleeve (33). The automatic feeding mechanism (4) includes a drive shaft (42) located in a gearbox (41). The drive shaft (42) is equipped with a large gear I (43) and a small gear I (44) for the front and rear. The gearbox (41) is equipped with an oil motor (5) connected to the drive shaft (42). The gearbox (41) is equipped with a gear shaft (45) that can slide forward and backward. The front end of the gear shaft (45) is connected to the push-pull rod (32) through a transmission rod (7). A lever (8) that can touch the switch of the oil motor (5) is installed on the rear end of the gear shaft (45). The gear shaft (45) is equipped with a small gear II (46) that can mesh with and disengage from the large gear I (43). A ball screw drive pair (6) is provided between the gearbox (41) and the grinding head body (2). The ball screw drive pair (6) includes a nut (62) screwed onto the ball screw (61). The rear part of the ball screw (61) is installed in the gearbox (41). A large gear II (47) that meshes with the small gear I (44) is installed on the rear part of the ball screw (61). The nut (62) is installed on the grinding head body (2). Pull the push-pull rod (32) forward to the manual position, and the small gear II (46) meshes with the large gear I (43) to achieve manual feed; push the push-pull rod (32) backward to the automatic position, and the small gear II (46) disengages from the large gear I (43) to achieve hydraulically driven automatic feed.

2. The feed device for a hydraulically driven ball screw pair in a surface grinder according to claim 1, characterized in that: The gear shaft (45) has two annular slots, one in front and one in back. The gearbox (41) has a retaining bead (9) that can engage with each annular slot when it returns to its elastic position. The positions of the two annular slots correspond to the manual and automatic positions of the push-pull rod (32), respectively.

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