Cam shaft type stable lifting roller bed

Abstract

The utility model provides a cam shaft type stable lifting roller bed, which comprises two lifting towers, a roller bed and a motor, two cam shafts are vertically and rotatably arranged in the two lifting towers respectively, a spiral curved groove is arranged on the shaft surface of each cam shaft, and the turning directions of the curved grooves of the two cam shafts in the same lifting tower are the same. A cam follower is arranged in the curved groove in a rolling manner, extends out of the lifting tower and is fixedly connected with the roller bed; the motor is located below the roller bed and drives the four camshafts to be synchronous through the power transmission mechanism, and the two camshafts in the same lifting tower rotate in the same direction. According to the lifting structure, the two ends of the roller bed are vertically and movably connected to the corresponding lifting towers through the two cam driven pieces respectively, the supporting force of the roller bed is increased, the supporting stability of the roller bed is improved, the roller bed can be lifted and descended stably, and meanwhile the lifting structure is compact and facilitates overall layout.

Description

Technical Field

[0001] This utility model belongs to the technical field of lifting roller beds, and in particular relates to a camshaft-type smooth lifting roller bed. Background Technology

[0002] In automobile manufacturing, cam-type lifting roller beds are commonly used to facilitate the transport of car frames and other components between two workstations. A cam-type lifting roller bed consists of two lifting towers and a roller bed positioned between them. Each of the two lifting towers has a vertically rotating camshaft. Curved grooves are formed on the surface of the camshafts, and cam connectors are rolled along these grooves. The cam connectors extend beyond the two sections of the roller bed behind the lifting towers. A vertical slide rail-slider moving pair is installed between the roller bed and the lifting towers to ensure the linearity of the roller bed's vertical movement.

[0003] However, in this cam-type lifting roller bed structure, each lifting tower is equipped with only one camshaft, and each is connected to the roller bed through a cam connector. This means the entire roller bed is supported by two cam connectors, which raise or lower the roller bed. Since the roller bed itself is large and heavy (consisting of a shell, several idler rollers, a motor driving the idler rollers, and other components), this structure, which uses two cam connectors to support the roller bed and drive its up and down movement, suffers from insufficient support force and instability. Improving the support force of the cam connectors on the roller bed and enhancing the lifting and lowering stability by simply increasing the camshaft diameter, the size of the curved groove, and the corresponding size of the cam connectors results in a large space requirement and inconvenient layout. Utility Model Content

[0004] In view of this, the present invention aims to propose a camshaft-type smooth lifting roller bed to improve the stability of the roller bed support and enable the roller bed to lift and lower smoothly.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A camshaft-type smooth lifting roller bed includes two lifting towers, a roller bed, and a motor. Two camshafts are vertically rotatably arranged in the two lifting towers respectively. Each camshaft has a spiral curved groove on its surface. The two camshafts in the same lifting tower have the same spiral direction of the curved groove. A cam follower is rolled in the curved groove. The cam follower has the same height. The cam follower extends from the lifting tower and is fixedly connected to the roller bed.

[0007] The motor is located below the roller bed, and the motor drives four camshafts to rotate synchronously through a power transmission mechanism, with two camshafts in the same direction rotating in the same direction within the same lifting tower.

[0008] Furthermore, the power transmission mechanism includes a second bevel gear at the bottom of each of the two camshafts in each lifting tower, and a driving spur gear in the lifting tower. The driving spur gear is connected to the motor via a universal joint. The driving spur gear meshes with two driven spur gears on the left and right. Each of the two driven spur gears is coaxially provided with a first bevel gear, and each of the two first bevel gears meshes with a second bevel gear.

[0009] Furthermore, the curved groove is a constant curvature groove.

[0010] Furthermore, the helix angle of the curved groove is 45°.

[0011] Furthermore, the bottom of the curved groove is an arc-shaped surface, the cam follower is cylindrical, and its end face extending into the curved groove is spherical.

[0012] Furthermore, the motor is a variable frequency motor.

[0013] Compared with the prior art, the camshaft-type smooth lifting roller bed of this utility model has the following advantages:

[0014] In this invention, each lifting tower is equipped with two camshafts and a cam follower. The two ends of the roller bed are vertically connected to the corresponding lifting tower through two cam followers. The four cam followers move synchronously to raise or lower the roller bed, increasing the support force on the roller bed and supporting it stably. This allows the roller bed to operate stably when raised or lowered. At the same time, the lifting structure is compact and easy to arrange in the overall layout. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0016] Figure 1 This is a three-dimensional schematic diagram of a camshaft-type smooth lifting roller bed according to an embodiment of the present utility model;

[0017] Figure 2 This is a front view of a camshaft-type smooth lifting roller bed according to an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the camshaft in a camshaft-type smooth lifting roller bed according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic front view of the power transmission mechanism in this embodiment;

[0020] Figure 5 This is a schematic top view of the power transmission mechanism in this embodiment;

[0021] Figure 6 This is a schematic side view of the power transmission mechanism in this embodiment.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-Roller bed; 2-Lifting tower; 3-Motor; 4-Universal shaft; 5-Camshaft; 51-Curved groove; 6-Cam follower; 7-First bevel gear; 8-Second bevel gear; 9-Driven spur gear; 10-Driving spur gear. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 , Figure 2As shown, a camshaft-type smooth lifting roller bed includes two lifting towers 2, a roller bed 1, and a motor 3. The roller bed 1 and motor 3 are located between the two lifting towers 2, with the motor 3 located below the roller bed 1. Two camshafts 5 are vertically rotatably mounted inside each of the two lifting towers 2, and the two camshafts 5 are arranged side by side. The structure of the camshaft 5 is as follows. Figure 3 As shown, a spiral curved groove 51 is formed on the surface of its shaft. The curved groove 51 is preferably a constant curvature groove with a rise angle of 45°. The two camshafts 5 in the same lifting tower 2 have the same spiral direction of the curved groove 51. A cam follower 6 is rolled in the curved groove 51. The cam follower 6 has the same height and extends from the lifting tower 2 and is fixedly connected to the roller bed 1. The motor 3 is preferably a variable frequency motor. The motor 3 drives the four camshafts 5 to rotate synchronously and the two camshafts 5 in the same lifting tower 2 to rotate in the same direction through a power transmission mechanism.

[0029] Preferably, a slide rail-slider connection structure can be provided vertically between the roller bed 1 and the lifting tower 2 to further improve the linearity of the roller bed 1's lifting.

[0030] In this utility model, the power transmission mechanism enables the four camshafts 5 to rotate synchronously, and two camshafts 5 within the same lifting tower 2 rotate in the same direction. Each camshaft 5 is matched with a cam follower 6, so that the two ends of the roller bed 1 are supported by two cam followers 6 respectively. The four cam followers 6 work together and roll in their respective curved grooves 51, which increases the magnitude of the support force on the roller bed and improves the support stability of the roller bed. The roller bed 1 is raised and lowered under the action of the four cam followers 6, which improves its vertical movement stability.

[0031] In this utility model, the schematic diagram of the power transmission mechanism is as follows: Figure 4 , Figure 5 and Figure 6 As shown, each lifting tower 2 includes two second bevel gears 8 at the bottom of two camshafts 5, and a driving spur gear 10 within the same lifting tower 2. The driving spur gear 10 has a horizontal central axis and is connected to the motor 3 via a universal joint 4. The driving spur gear 10 meshes with two driven spur gears 9, one on the left and one on the right. Each of the two driven spur gears 9 has a first bevel gear 7 coaxially mounted on it, and each of the two first bevel gears 7 meshes with a second bevel gear 8. When the motor 3 rotates, its power is transmitted to the camshafts through a power transmission mechanism, causing the two camshafts 5 within the same lifting tower 2 to rotate in the same direction. The cam follower 6 rolls relative to the curved groove, causing the roller bed 1 to rise or fall.

[0032] In this invention, the bottom of the curved groove 51 is an arc-shaped surface, the cam follower 6 is cylindrical, and its end face extending into the curved groove 51 is spherical.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A camshaft-type smooth lifting roller bed, comprising two lifting towers (2), a roller bed (1), and a motor (3), characterized in that: Two camshafts (5) are vertically rotatably installed in the two lifting towers (2). Each camshaft (5) has a spiral curved groove (51) on its surface. The two camshafts (5) in the same lifting tower (2) have the same spiral direction of the curved groove (51). A cam follower (6) is rolled in the curved groove. The cam follower (6) has the same height. The cam follower (6) extends out of the lifting tower (2) and is fixedly connected to the roller bed (1). The motor (3) is located below the roller bed (1). The motor (3) drives four camshafts (5) to rotate synchronously and two camshafts (5) in the same direction within the same lifting tower (2) through a power transmission mechanism.

2. The camshaft-type smooth lifting roller bed according to claim 1, characterized in that: The power transmission mechanism includes a second bevel gear (8) set at the bottom of each of the two camshafts (5) in each lifting tower (2), and a driving spur gear (10) set in the lifting tower (2). The driving spur gear (10) is connected to the motor (3) through a universal joint (4). The driving spur gear (10) meshes with two driven spur gears (9) on the left and right. Each of the two driven spur gears (9) is coaxially provided with a first bevel gear (7). Each of the two first bevel gears (7) meshes with a second bevel gear (8).

3. The camshaft-type smooth lifting roller bed according to claim 1, characterized in that: The curved groove (51) is a constant curvature groove.

4. The camshaft-type smooth lifting roller bed according to claim 3, characterized in that: The spiral angle of the curved groove (51) is 45°.

5. The camshaft-type smooth lifting roller bed according to claim 1, characterized in that: The bottom of the curved groove (51) is an arc-shaped surface, the cam follower (6) is cylindrical, and its end face extending into the curved groove (51) is spherical.

6. The camshaft-type smooth lifting roller bed according to claim 1, characterized in that: The motor (3) is a variable frequency motor.

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