Pneumatic motor

Abstract

The utility model relates to the technical field of motors, in particular to a pneumatic motor which can effectively reduce the size and improve the product integration level and comprises a reversing valve body and a motor body, two first piston cavities are formed in the reversing valve body, an air inlet is formed in the reversing valve body, and a second piston cavity is formed in the motor body. A reversing valve piston is mounted in each first piston cavity, the two reversing valve pistons are connected through a connecting rod, a convex rib block is arranged on one side of the middle of the connecting rod, a mounting groove is formed in one side of the connecting rod, and a pressing wheel abutting against the connecting rod is mounted in the mounting groove through a spring; a second piston cavity is formed in the motor body, a motor piston connected with a piston rod is installed in the second piston cavity, an upper seat body and a lower seat body of the motor body are respectively provided with an air inlet channel communicated with the second piston cavity, and the air inlet channels are communicated with an air distribution channel in the reversing valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a pneumatic motor. Background Art

[0002] A pneumatic motor refers to a device that converts the pressure energy of compressed air into rotational mechanical energy. For example, the invention patent with publication number CN104454013A discloses an automatic reversing mechanism for a pneumatic motor, in which a spring-loaded pressure wheel is fixed to the reversing valve body in the reversing valve, and a convex rib block is arranged on the inner wall of the reversing valve. The pressure wheel and the convex rib block cooperate to prevent the reversing valve body from getting stuck in the middle position and being unable to reset in time. However, it requires a larger reversing valve cavity, which is large in size, and an external air path is required between the reversing valve and the motor body to realize control, and the integration is poor. Summary of the invention

[0003] In order to solve the above technical problems, the utility model provides a pneumatic motor, which can effectively reduce the volume and improve the product integration.

[0004] The technical solution is as follows: a pneumatic motor, comprising a reversing valve body and a motor body, characterized in that two first piston chambers are arranged in the reversing valve body, an air inlet is provided on the reversing valve body, a reversing valve piston is installed in each of the first piston chambers, the two reversing valve pistons are connected by a connecting rod, a convex rib block is provided on the middle side of the connecting rod, a mounting groove is provided on one side of the connecting rod, a pressure wheel that presses against the connecting rod is installed in the mounting groove through a spring; a second piston chamber is provided in the motor body, a motor piston connected to the piston rod is installed in the second piston chamber, an air inlet channel connected to the second piston chamber is respectively provided on the upper seat body and the lower seat body of the motor body, and the air inlet channel is connected to the air distribution channel in the reversing valve body.

[0005] Its further feature is that an air intake block is installed at the air inlet, and an air intake joint is installed at the bottom of the air intake block.

[0006] After adopting the utility model, the original movable pressure wheel is installed in a fixed position, and the convex rib block is installed on the connecting rod. The structural improvement and optimization can greatly reduce the volume of the directional valve body, and there is no external pipeline. The directional valve body and the motor body are connected by a built-in channel, which greatly improves the integration of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of the utility model;

[0008] Figure 2 It is the internal schematic diagram of the utility model. DETAILED DESCRIPTION

[0009] See Figure 1 , Figure 2 As shown, a pneumatic motor includes a reversing valve body 1 and a motor body 2. Two first piston chambers are arranged in the reversing valve body 1. An air inlet 3 is opened on the reversing valve body 1. An air inlet block 4 is installed at the air inlet 3. An air inlet joint 5 is installed at the bottom of the air inlet block 4. A reversing valve piston 6 is installed in each first piston chamber. The two reversing valve pistons 6 are connected by a connecting rod 7. A convex rib block 8 is arranged on the middle side of the connecting rod 7. A mounting groove is opened on one side of the connecting rod 7. A pressure wheel 10 that presses against the connecting rod 7 is installed in the mounting groove through a spring 9, that is, the pressure wheel 10 is fixed in one position and does not move, so that the convex rib block 8 moves with the connecting rod. When the middle protrusion of the convex rib block 8 contacts the pressure wheel 10, the spring 9 connected to the pressure wheel 10 is squeezed, and the spring 9 pushes the pressure wheel 10 in the reverse direction and pushes the convex rib block 8 to one side.

[0010] The motor body 2 is provided with a second piston chamber 11, in which a motor piston 13 connected to a piston rod 12 is installed, and an air intake channel 14 connected to the second piston chamber 11 is provided on the upper and lower seats of the motor body 2, respectively. The air intake channel 14 is connected to the gas distribution channel in the reversing valve body 1, and no external pipeline is required, and gas circulation is directly realized inside. The air intake channel 14 of the second piston chamber 11 is switched according to the movement of the reversing valve piston 6, so that the movement of the second piston chamber 11 can be realized. In the figure, 15 is a muffler, 16 is an exhaust port, and 17 is a reversing airway matched on the reversing valve body 1 and the connecting rod 7.

Claims

1. A pneumatic motor, comprising a reversing valve body and a motor body, characterized in that: Two first piston chambers are arranged in the reversing valve body, an air inlet is provided on the reversing valve body, a reversing valve piston is installed in each of the first piston chambers, the two reversing valve pistons are connected by a connecting rod, a convex rib block is provided on the middle side of the connecting rod, a mounting groove is provided on one side of the connecting rod, a pressure wheel that presses against the connecting rod is installed in the mounting groove through a spring; a second piston chamber is provided in the motor body, a motor piston connected to the piston rod is installed in the second piston chamber, and air intake channels connected to the second piston chamber are respectively provided on the upper seat body and the lower seat body of the motor body, and the air intake channel is connected to the air distribution channel in the reversing valve body.

2. A pneumatic motor according to claim 1, characterized in that: An air intake block is installed at the air intake port, and an air intake joint is installed at the bottom of the air intake block.

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