A rack and pinion rotary cylinder

Abstract

This utility model discloses a rack-and-pinion rotary hydraulic cylinder, relating to the field of hydraulic cylinder technology. The utility model includes a cavity, with a gear two rotatably connected to the inner wall of the cavity's back side via a support block. A rack two is meshed with the top and bottom of the gear two. Limit blocks are located on the left and right sides of the rack two. A worm gear is rotatably connected to the back of the cavity via a support block. The front of the worm gear is fixedly connected to the back of the gear two via a rotating shaft. A worm is rotatably connected to the back of the cavity via two support blocks. The bottom of the worm is meshed with the top of the worm gear. A knob is fixedly connected to the right side of the worm. By setting the limit blocks, specifically by rotating the knob, the worm and worm gear drive the gear two to rotate, causing the two rack two to simultaneously move closer or further apart. This adjusts the distance between the limit blocks on both sides of the rack two, restricting the piston's movement distance and thus adjusting the rotation angle of the output shaft. This solves the problems of existing rotary hydraulic cylinders being not only complex to operate but also expensive to use.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic cylinder technology, and in particular relates to a rack and pinion rotary hydraulic cylinder. Background Technology

[0002] A rotary cylinder is a hydraulic device that can achieve continuous rotational motion. Its core function is to convert the pressure energy of hydraulic oil into a limited-angle rotational motion of the output shaft. Existing rotary cylinders usually control the rotation angle by the volume of hydraulic oil flowing in and out. This is not only relatively complex to operate, but also requires the use of proportional valves, servo valves, angle sensors, and complex hydraulic pump stations, resulting in high costs. Utility Model Content

[0003] The purpose of this invention is to provide a rack and pinion rotary cylinder. By setting a limiting block, specifically by rotating a knob, the worm gear rotates, causing the worm wheel to drive the second gear to rotate, thereby causing the two racks to move closer or further apart simultaneously. This is used to adjust the distance between the limiting blocks on both sides of the racks. The limiting blocks restrict the piston's movement distance, thereby adjusting the rotation angle of the output shaft. Due to the self-locking characteristics of the worm wheel and worm, displacement of the limiting blocks caused by piston collisions is prevented. The rotation angle of the output shaft can be adjusted simply by rotating the knob. The structure is simple and the operating cost is low, solving the problems of existing rotary cylinders being not only complex to operate but also expensive to use.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to a rack-and-pinion rotary hydraulic cylinder, comprising a cavity. An oil port one is fixedly connected to the left side of the cavity, and an oil port two is fixedly connected to the right side. Two pistons are slidably connected to the inner wall of the cavity. A rack one and a support rod are fixedly connected to corresponding sides of the two pistons, respectively. A gear one is rotatably connected to the inner wall of the front of the cavity via a bearing. The bottom of gear one meshes with the top of rack one. An output shaft is fixedly connected to the front of gear one, extending through the front of the cavity and outwards. A gear two is rotatably connected to the inner wall of the back of the cavity via a support block. A rack two is meshed with both the top and bottom of gear two. Connecting blocks are fixedly connected to the left and right sides of rack two. A limiting block is fixedly connected to the side of the connecting block away from gear two. The side of the limiting block away from gear two contacts the side of the piston close to gear two. A worm gear is rotatably connected to the back of the cavity via a support block. The front of the worm gear is fixedly connected to the back of gear two via a rotating shaft. A worm is rotatably connected to the back of the cavity via two support blocks. The bottom of the worm meshes with the top of the worm gear. A knob is fixedly connected to the right side of the worm. Rotating the knob controls the limiting block to restrict the piston's movement distance, thereby adjusting the rotation angle of the output shaft. Due to the self-locking characteristics of the worm gear and worm, displacement of the limiting block caused by piston collision can be prevented. Rotating the knob can complete the adjustment of the output shaft's rotation angle. The structure is simple and the cost of use is low.

[0006] Furthermore, the outer surface of the piston is fixedly connected with multiple layers of sealing rings. The outer surface of the multiple layers of sealing rings is in interference contact with the inner wall of the cavity. This greatly enhances the sealing performance between the piston and the cavity, effectively prevents high-pressure oil from leaking from both sides of the piston, ensures stable internal pressure of the cylinder, improves driving efficiency and reliability, and extends service life.

[0007] Furthermore, a damping rod is fixedly connected to the side of the connecting block away from gear two. A spring is sleeved on the outer surface of the damping rod. The side of the damping rod away from gear two contacts the side of the piston close to gear two. The damping rod and the spring form a buffer structure, which can absorb the impact force generated when gear two drives rack two to move, reduce the instantaneous movement speed of the piston, effectively protect the piston, rack and related connecting parts, reduce noise and vibration, and improve the stability of system operation and component life.

[0008] Furthermore, two limiting rods are fixedly connected to the corresponding sides of the two pistons. The outer surface of the limiting rods is slidably connected to the inside of the rack two. The limiting rods connecting the two pistons pass through the inside of the rack two and are slidably connected, which precisely limits and guides the linear motion trajectory of the rack two under the piston drive, ensuring the stability of the meshing of the gear two and improving the accuracy and reliability of the entire transmission system.

[0009] Furthermore, an observation window is provided on the back of the cavity, which allows the operator to observe the position of the limit block at any time for easy adjustment. At the same time, the operator can directly observe the operating status, wear condition or meshing position of key components such as gear two and rack two, which facilitates status monitoring, fault diagnosis and maintenance inspection.

[0010] Furthermore, a scale is fixedly connected to the bottom of the observation window. The scale, in conjunction with the visible limit block inside, provides precise position indication, allowing the operator to intuitively read the quantitative values ​​of the output shaft rotation angle or piston displacement through the observation window, facilitating precise manual adjustment, position setting, or calibration.

[0011] This utility model has the following beneficial effects:

[0012] 1. This utility model uses a limiting block, specifically by rotating a knob to drive the worm gear to rotate, which in turn drives the gear two to rotate, thereby causing the two racks two to move closer or further apart simultaneously. This is used to adjust the distance between the limiting blocks on both sides of the rack two. The limiting blocks restrict the movement distance of the piston, thereby adjusting the rotation angle of the output shaft. Due to the self-locking characteristics of the worm gear and worm wheel, displacement of the limiting blocks caused by piston collision can be prevented. The rotation angle of the output shaft can be adjusted by rotating the knob. The structure is simple and the cost of use is low.

[0013] 2. This utility model, by setting a damping rod and a spring, specifically, when the piston contacts the limiting block, the damping rod and spring use their elasticity to buffer the impact force of the piston, avoid the continuous impact of the piston from damaging the transmission mechanism, and improve the service life of the parts.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the cavity of this utility model;

[0018] Figure 3 This is a schematic diagram of the gear structure of this utility model;

[0019] Figure 4This utility model Figure 3 A schematic diagram of the enlarged structure of A in the middle;

[0020] Figure 5 This is a schematic diagram of the back structure of the cavity of this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Cavity; 11. Oil Port 1; 111. Oil Port 2; 12. Piston; 121. Rack 1; 122. Support Rod; 123. Gear 1; 124. Output Shaft; 125. Multi-layer Seal Ring; 13. Gear 2; 131. Rack 2; 132. Connecting Block; 133. Limiting Block; 134. Worm Gear; 135. Worm; 136. Knob; 137. Damping Rod; 138. Spring; 139. Limiting Rod; 14. Observation Window; 141. Scale. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figures 1-5As shown, this utility model is a rack and pinion rotary cylinder, including a cavity 1. An oil port 11 is fixedly connected to the left side of the cavity 1, and an oil port 111 is fixedly connected to the right side of the cavity 1. Two pistons 12 are slidably connected to the inner wall of the cavity 1. A rack 121 and a support rod 122 are fixedly connected to the corresponding sides of the two pistons 12, respectively. A gear 123 is rotatably connected to the inner wall of the front of the cavity 1 via a bearing. The bottom of the gear 123 meshes with the top of the rack 121. An output shaft 124 is fixedly connected to the front of the gear 123, penetrating the front of the cavity 1 and extending to the outside. A gear 23 is rotatably connected to the inner wall of the back of the cavity 1 via a support block. A rack 231 meshes with the top and bottom of the gear 23. Connecting blocks 132 are fixedly connected to the left and right sides of the rack 231. A limiting block 133 is fixedly connected to the side of the connecting block 132 away from the gear 23. The side of the limiting block 133 away from the gear 213 is close to the piston 12. One side of the gear 13 is in contact with the cavity 1. The back of the cavity 1 is rotatably connected to the worm gear 134 via a support block. The front of the worm gear 134 is fixedly connected to the back of the gear 13 via a rotating shaft. The back of the cavity 1 is rotatably connected to the worm 135 via two support blocks. The bottom of the worm 135 meshes with the top of the worm gear 134. A knob 136 is fixedly connected to the right side of the worm 135. By setting a limit block 133, specifically by rotating the knob 136, the worm 135 is driven to rotate, causing the worm gear 134 to drive the gear 13 to rotate, thereby causing the two racks 131 to move closer or further apart at the same time. This is used to adjust the distance between the limit blocks 133 on both sides of the racks 131. The limit blocks 133 will limit the movement distance of the piston 12, thereby adjusting the rotation angle of the output shaft 124. Due to the self-locking characteristics of the worm gear 134 and the worm 135, the limit blocks 133 can be prevented from being displaced due to the collision of the piston 12. The rotation angle of the output shaft 124 can be adjusted by rotating the knob 136. The structure is simple and the cost of use is low.

[0025] The outer surface of the piston 12 is fixedly connected with a multi-layer sealing ring 125, and the outer surface of the multi-layer sealing ring 125 is in interference contact with the inner wall of the cavity 1.

[0026] A damping rod 137 is fixedly connected to the side of the connecting block 132 away from the gear 13. A spring 138 is sleeved on the outer surface of the damping rod 137. The side of the damping rod 137 away from the gear 13 contacts the side of the piston 12 close to the gear 13. By setting the damping rod 137 and the spring 138, specifically, when the piston 12 contacts the limiting block 133, the damping rod 137 and the spring 138 use their elasticity to buffer the impact force of the piston 12, avoid the piston 12 from continuously impacting and damaging the transmission mechanism, and improve the service life of the parts.

[0027] Two limiting rods 139 are fixedly connected to one side of the two pistons 12 respectively, and the outer surface of the limiting rods 139 is slidably connected to the inside of the rack 131.

[0028] An observation window 14 is provided on the back of cavity 1.

[0029] A scale 141 is fixedly connected to the bottom of the observation window 14.

[0030] A specific application of this embodiment is as follows: During use, hydraulic oil is injected through oil port 11 and oil port 111 to push the internal piston 12 to slide, causing rack 121 to drive gear 123 to rotate. The linear motion is converted into rotational motion through the output shaft 124. When the rotation angle needs to be adjusted, the knob 136 is turned, which drives the worm 135 to rotate, causing the worm wheel 134 to drive gear 13 to rotate. This causes the two racks 131 to move closer or further apart simultaneously, adjusting the distance between the limiting blocks 133 on both sides of rack 131. The limiting blocks 133 restrict the movement distance of the piston 12, thereby adjusting the rotation angle of the output shaft 124. Due to the self-locking characteristics of the worm wheel 134 and worm 135, the rotation angle can be adjusted. The displacement of the limiting block 133 caused by the collision of piston 12, and the contact between piston 12 and limiting block 133, damping rod 137 and spring 138 use their elasticity to buffer the impact force of piston 12, avoid the continuous impact of piston 12 to damage the transmission mechanism, and improve the service life of parts. While limiting block 133 moves, rack 131 slides on the outer surface of limiting rod 139. Limiting rod 139 provides a stable motion trajectory for the movement of limiting block 133, preventing deviation or jamming during its movement. An observation window 14 is provided on the back of cavity 1, through which the position of limiting block 133 can be observed in real time. With the help of scale 141, the rotation angle of output shaft 124 can be easily adjusted in real time.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A rack-and-pinion rotary cylinder, comprising a cavity (1), wherein an oil port 1 (11) is fixedly connected to the left side of the cavity (1), and an oil port 2 (111) is fixedly connected to the right side of the cavity (1). Two pistons (12) are slidably connected to the inner wall of the cavity (1). A rack 1 (121) and a support rod (122) are fixedly connected to the corresponding sides of the two pistons (12). A gear 1 (123) is rotatably connected to the inner wall of the front of the cavity (1) via a bearing. The bottom of the gear 1 (123) meshes with the top of the rack 1 (121). An output shaft (124) is fixedly connected to the front of the gear 1 (123). The front of the output shaft (124) penetrates the front of the cavity (1) and extends to the outside. The cylinder is characterized in that: The inner wall of the back of the cavity (1) is rotatably connected to a gear two (13) via a support block. The top and bottom of the gear two (13) are meshed with a rack two (131). The left and right sides of the rack two (131) are fixedly connected to a connecting block (132). The side of the connecting block (132) away from the gear two (13) is fixedly connected to a limiting block (133). The side of the limiting block (133) away from the gear two (13) is in contact with the side of the piston (12) close to the gear two (13). The back of the cavity (1) is rotatably connected to a worm gear (134) via a support block. The front of the worm gear (134) is fixedly connected to the back of the gear two (13) via a rotating shaft. The back of the cavity (1) is rotatably connected to a worm (135) via two support blocks. The bottom of the worm (135) is meshed with the top of the worm gear (134). The right side of the worm (135) is fixedly connected to a knob (136).

2. A rack-and-pinion rotary cylinder according to claim 1, characterized in that, The piston (12) has a multi-layer sealing ring (125) fixedly connected to its outer surface, and the outer surface of the multi-layer sealing ring (125) is in interference contact with the inner wall of the cavity (1).

3. A rack-and-pinion rotary cylinder according to claim 2, characterized in that, A damping rod (137) is fixedly connected to the side of the connecting block (132) away from the gear (13). A spring (138) is sleeved on the outer surface of the damping rod (137). The side of the damping rod (137) away from the gear (13) is in contact with the side of the piston (12) close to the gear (13).

4. A rack-and-pinion rotary cylinder according to claim 3, characterized in that, Two limiting rods (139) are fixedly connected to one side of the two pistons (12), and the outer surface of the limiting rods (139) is slidably connected to the inside of the rack (131).

5. A rack-and-pinion rotary cylinder according to claim 4, characterized in that, An observation window (14) is provided on the back of the cavity (1).

6. A rack-and-pinion rotary cylinder according to claim 5, characterized in that, A scale (141) is fixedly connected to the bottom of the observation window (14).

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