Manual feeding device of grinding machine

Abstract

The utility model discloses a manual feeding device of a grinding machine, which comprises an automatic feeding mechanism and a manual feeding mechanism which are respectively arranged at two ends of a feeding shaft, the manual feeding mechanism comprises a hand wheel, a pull rod and a bearing component arranged on a base, the pull rod is arranged in an inner bearing sleeve of the bearing component in a sliding mode, and a key and a key groove are matched between the pull rod and the inner bearing sleeve in a sliding mode. The hand wheel is mounted on the inner bearing sleeve; the automatic feeding mechanism comprises a gear shaft which is arranged in the gear box body and can slide forwards and backwards; a driven pinion which can be meshed with and separated from a driving gearwheel arranged in the gear box body is arranged on the gear shaft; the feed shaft is respectively connected with the gear shaft and the pull rod; when the pull rod is pulled backwards to an automatic gear, the driven small gear is meshed with the driving large gear to achieve automatic feeding, and when the pull rod is pushed forwards to a manual gear, the driven small gear is separated from the driving large gear to achieve manual feeding. The device is simple in structure, light and convenient to operate, high in feeding sensitivity and grinding quality, and particularly suitable for manual grinding of workpiece leaning surfaces and grooves.

Description

Technical Field

[0001] The utility model relates to a component structure of a grinding machine, in particular to a manual feeding device of a grinding machine. Background Art

[0002] Grinding is a very important mechanical processing method, and grinding machines are one of the most widely used machine tools, which are widely used in various fields of industrial production.

[0003] The purpose of manual feed of the grinder is to quickly align or feed the workpiece. Automatic feeding and manual feeding can be achieved by pushing and pulling the pull rod in and out through the handwheel. In the manual feed state, the feed shaft (ball screw) is driven by turning the handle to achieve the feed movement of the feed shaft. It is particularly suitable for manual grinding of workpiece parts such as surfaces and grooves.

[0004] The manual feed mechanism of the grinding machine mostly uses a handwheel to drive a worm gear (worm) reducer to achieve feed. The structure is relatively complex, and installation and disassembly are time-consuming and labor-intensive. If the handwheel is too tight, the operating force is large, and pushing and pulling are laborious. This is more suitable for surface grinding or rapid tool setting, but for parts with surfaces, grooves, etc. to be ground, the operation is very strenuous, the feed sensitivity is poor, and the feed is inaccurate, resulting in workpiece burning and scrapping.

[0005] According to the requirements of JB / T3382.2-2014 Technical Conditions for Horizontal Spindle and Reciprocating Table Surface Grinders, the horizontal handwheel operating force of the grinder is assessed based on infrequent use. The standard requires that the handwheel operating force be less than 120N to meet the requirements. Under this condition, manual feed is tight and laborious. Utility Model Content

[0006] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a manual feeding device for a grinding machine which is easy to operate.

[0007] A manual feeding device for a grinding machine capable of solving the problems of the prior art comprises a feeding shaft, with an automatic feeding mechanism and a manual feeding mechanism respectively provided at both ends of the feeding shaft. The difference is that:

[0008] 1. The manual feed mechanism includes a handwheel with a scale, a pull rod and a bearing assembly installed on the base. The pull rod is slidably installed in the inner bearing sleeve of the bearing assembly. A key and a keyway are slidably fitted between the pull rod and the inner bearing sleeve. The handwheel is installed on the inner bearing sleeve.

[0009] 2. The automatic feeding mechanism includes a gear shaft which is arranged in the gear box body and can slide forward and backward. The gear shaft is provided with a driven small gear which can engage with and disengage from the driving large gear arranged in the gear box body.

[0010] 3. The feed shaft is connected to the gear shaft and the pull rod respectively.

[0011] 4. Pull the lever backward to the automatic gear position, and the driven pinion engages with the driving gear to achieve automatic feeding; push the lever forward to the manual gear position, and the driven pinion disengages from the driving gear to achieve automatic feeding.

[0012] Furthermore, a handle and a crank are installed on the lever.

[0013] Furthermore, a crank is installed on the handwheel.

[0014] Furthermore, two bayonets are provided on the gear shaft, and detent balls that can be respectively engaged with the bayonets during elastic return are provided in the gear box body. The positions of the two bayonets respectively correspond to the manual gear position and the automatic gear position of the lever.

[0015] Advantages of the utility model:

[0016] 1. The structure of the manual feeding device of the grinding machine of the utility model is simple, easy to operate and labor-saving. By converting the pushing and pulling of the lever through the handle, manual feeding and automatic feeding can be respectively achieved, which is especially suitable for the manual grinding of the mating surface of workpieces and groove parts.

[0017] 2. The feed sensitivity of the utility model is high (up to 0.01 mm), improving the grinding quality of workpieces.

[0018] 3. The utility model has high reliability and stability and can operate for a long time without failure. Description of the drawings

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0020] Figure 2 It is Figure 1 a schematic structural diagram of the manual feeding mechanism in the embodiment.

[0021] Figure 3 It is Figure 1 a schematic structural diagram of the automatic feeding mechanism in the embodiment.

[0022] Drawing number identification: 1. Feed shaft; 2. Automatic feeding mechanism; 2-1. Gear shaft; 2-2. Driving gear; 2-3. Driven pinion; 2-4. Detent ball; 2-5. Gear box body; 3. Manual feeding mechanism; 3-1. Handwheel; 3-2. Lever; 3-3. Base; 3-4. Inner bearing sleeve; 3-5. Outer bearing sleeve; 3-6. Rolling bearing; 3-7. Key; 3-8. Handle; 3-9. Dial; 3-10. Crank; 4. Coupling sleeve; 5. Axle pin. Detailed implementation manners

[0023] The technical solution of the present utility model will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0024] The manual feeding device of the grinding machine of the present utility model includes an automatic feeding mechanism 2 and a manual feeding mechanism 3 provided at the front and rear ends of the feeding shaft 1, as Figure 1 shown.

[0025] The manual feeding mechanism 3 includes a handwheel 3-1, a pull rod 3-2 and a bearing assembly: the bearing assembly includes an inner bearing sleeve 3-4 and an outer bearing sleeve 3-5 (the two are coaxial) provided in the bearing hole of the base 3-3, and rolling bearings 3-6 are provided before and after between the inner bearing sleeve 3-4 and the outer bearing sleeve 3-5; the handwheel 3-1 is coaxially installed on the rear end face of the inner bearing sleeve 3-4, a scale disk 3-9 is coaxially installed on the handwheel 3-1, and a crank 3-10 is also installed on the handwheel 3-1; the pull rod 3-2 is arranged through the inner bearing sleeve 3-4 and the handwheel 3-1, the pull rod 3-2 is slidably fitted in the inner bearing sleeve 3-4, a sliding key 3-7 and a keyway are provided between the pull rod 3-2 and the inner bearing sleeve 3-4, and a handle 3-8 is installed at the rear end of the pull rod 3-2, as Figure 2 shown.

[0026] The automatic feeding mechanism 2 includes a gear shaft 2-1 provided in the gear box 2-5 and capable of sliding forward and backward, and a driven small gear 2-3 coaxially provided on the gear shaft 2-1 and capable of engaging and disengaging with a driving large gear 2-2 provided in the gear box 2-5, as Figure 3 shown.

[0027] The front end of the feeding shaft 1 is coaxially connected to the rear shaft end of the gear shaft 2-1 through a coupling sleeve 4, and the rear end tail hole of the feeding shaft 1 is coaxially sleeved with the front end of the pull rod 3-2 and axially connected through a radially inserted shaft pin 5, as Figure 1 , Figure 2 , Figure 3 shown.

[0028] The shaft body of the gear shaft 2-1 that is slidably fitted with the gear box 2-5 is provided with two front and rear bayonets (arc-shaped concave inward), and a snap bead 2-4 that can elastically return radially is provided in the gear box 2-5. During the forward and backward movement of the gear shaft 2-1, the snap bead 2-4 can be respectively engaged in the front and rear bayonets, as Figure 3 shown.

[0029] The operation mode of the present utility model is:

[0030] 1. Pull the pull rod 3-2 backward through the handle 3-8 to the automatic feed gear position. The driven pinion 2-3 moves backward and meshes with the driving gear 2-2. The driving gear 2-2 drives the feed shaft 1 to rotate through the driven pinion 2-3 to achieve automatic feed. At this time, the detent ball 2-4 engages with the rear bayonet to limit the gear shaft 2-1 in the automatic feed gear position.

[0031] 2. Push the pull rod 3-2 forward through the handle 3-8 to the manual feed gear position. The driven pinion 2-3 moves forward and separates from the driving gear 2-2. Rotate the handwheel 3-1 through the crank 3-10 to rotate the feed shaft 1, thereby achieving manual feed. At this time, the detent ball 2-4 engages with the front bayonet to limit the gear shaft 2-1 in the manual feed gear position.

Claims

1. Manual feed device for grinding machine, including a feed shaft (1), with an automatic feed mechanism (2) and a manual feed mechanism (3) respectively provided at both ends of the feed shaft (1), characterized in that: The manual feed mechanism (3) includes a handwheel (3-1) with a dial (3-9), a pull rod (3-2), and a bearing assembly installed on a base (3-3). The pull rod (3-2) is slidably installed in an inner bearing sleeve (3-4) of the bearing assembly. A key (3-7) and a keyway are slidably fitted between the pull rod (3-2) and the inner bearing sleeve (3-4). The handwheel (3-1) is installed on the inner bearing sleeve (3-4). The automatic feed mechanism (2) includes a gear shaft (2-1) disposed in a gear box (2-5) and capable of sliding forward and backward. A driven pinion (2-3) that can mesh with and disengage from a driving large gear (2-2) provided in the gear box (2-5) is provided on the gear shaft (2-1). The feed shaft (1) is respectively connected to the gear shaft (2-1) and the pull rod (3-2). Pull the pull rod (3-2) backward to the automatic gear position, and the driven pinion (2-3) meshes with the driving large gear (2-2) to achieve automatic feeding; push the pull rod (3-2) forward to the manual gear position, and the driven pinion (2-3) disengages from the driving large gear (2-2) to achieve manual feeding.

2. The manual feed device of a grinding machine according to claim 1, wherein: A handle (3-8) is installed on the pull rod (3-2).

3. The manual feed device of a grinding machine according to claim 1, characterized in that: A crank (3-10) is installed on the handwheel (3-1).

4. The manual feed device of a grinding machine according to any one of claims 1 to 3, characterized in that: Two notches are provided on the gear shaft (2-1), and detent balls (2-4) that can respectively engage with the notches when elastically returning are provided in the gear box (2-5). The positions of the two notches respectively correspond to the manual gear position and the automatic gear position of the pull rod (3-2).

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