Cam shaft type stable lifting roller bed

Abstract

The invention provides a cam shaft type stable lifting roller bed which comprises two lifting towers, a roller bed body and a motor, two cam shafts are vertically and rotationally arranged in the two lifting towers respectively, a spiral curve groove is formed in the shaft surface of each cam shaft, the turning directions of the curve grooves of the two cam shafts in the same lifting tower are the same, and the roller bed body is arranged in the roller bed body. 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 correspondingly, 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 lowered stably, and meanwhile the lifting structure is compact and facilitates overall layout.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting roller beds, and in particular relates to a camshaft type stable lifting roller bed. Background Art

[0002] Cam-type lifting roller beds are often used in automobile manufacturing to facilitate the transportation of automobile frames and other parts between two workstations. The cam-type lifting roller bed includes two lifting towers and a roller bed arranged between them. A camshaft is arranged vertically in each of the two lifting towers. A curved groove is provided on the surface of the camshaft. The cam connector is rolled in the curved groove. The cam connector extends out of the two roller beds behind the lifting tower. A slide rail-slider moving pair is vertically arranged between the roller bed and the lifting tower to ensure the linearity of the vertical movement of the roller bed.

[0003] However, in the cam-type lifting roller bed structure, since each lifting tower is only provided with one camshaft, each of which is connected to the roller bed through a cam connector, that is, the roller bed as a whole is supported by two cam connectors, and the roller bed is lifted or lowered under the action of the two cam connectors, and the roller bed itself is large in size and heavy in weight (the roller bed is composed of a shell, a number of rollers, a motor driving the rollers, and other parts), the structure that uses two cam connectors to support the roller bed and drive the roller bed to move up and down has the problem of small supporting force and unstable support. In order to improve the supporting force of the cam connector on the roller bed and improve the lifting and lowering stability of the roller bed, the improvement method of simply increasing the diameter of the camshaft, increasing the size of the curved groove, and correspondingly increasing the size of the cam connector has the problem of occupying a large space and inconvenient layout. Summary of the invention

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

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A camshaft type smooth lifting roller bed, comprising two lifting towers, a roller bed and a motor, wherein two camshafts are respectively arranged in the two lifting towers for vertical rotation, and a spiral curved groove is provided on the surface of each camshaft, and the curved grooves of the two camshafts in the same lifting tower have the same rotation direction, and cam followers are arranged in the curved grooves for rolling, and the cam followers have the same height, and the cam followers extend from the lifting towers and are fixedly connected to the roller bed;

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

[0008] Furthermore, the power transmission mechanism includes a second bevel gear respectively arranged at the bottom end of two camshafts in each lifting tower, and a driving spur gear arranged in the lifting tower, the driving spur gear is connected to the motor through a universal shaft, the driving spur gear is meshed with two driven spur gears on the left and right, the two driven spur gears are respectively coaxially arranged with a first bevel gear, and the two first bevel gears are respectively meshed 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 spiral groove is an arc-shaped surface, the cam follower is cylindrical, and its end surface extending into the spiral groove is a spherical surface.

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

[0013] Compared with the prior art, the camshaft-type smooth lifting roller bed described in the present invention has the following advantages:

[0014] In the present invention, two camshafts are arranged in each lifting tower and each is equipped with a cam follower, that is, the two ends of the roller bed are vertically connected to the corresponding lifting tower through the two cam followers, and the four cam followers act synchronously to lift the roller bed or lower the roller bed, thereby increasing the supporting force of the roller bed to stably support the roller bed, so that the roller bed can be lifted and lowered stably. At the same time, the lifting structure is compact and convenient for overall layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a three-dimensional schematic diagram of a camshaft-type stable lifting roller bed according to an embodiment of the present invention;

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

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

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

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

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

[0022] Description of reference numerals:

[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 DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

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

[0028] like Figure 1 , Figure 2 As 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 the motor 3 are located between the two lifting towers 2, and the motor 3 is located below the roller bed 1. Two camshafts 5 are respectively arranged vertically in 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 provided on the shaft surface, and the curved groove 51 is preferably a constant curvature groove with a lead angle of 45°. The curved grooves 51 of the two camshafts 5 in the same lifting tower 2 have the same rotation direction, and a cam follower 6 is arranged in a rolling manner in the curved groove 51. The cam followers 6 have the same height, and the cam followers 6 extend from the lifting tower 2 and are fixedly connected to the roller bed 1. The motor 3 is preferably a variable frequency motor, and the motor 3 drives the four camshafts 5 synchronously through a power transmission mechanism, and the two camshafts 5 in the same lifting tower 2 rotate in the same direction.

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

[0030] In the present invention, the power transmission mechanism makes the four camshafts 5 rotate synchronously and the two camshafts 5 in 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 respectively supported by two cam followers 6. The four cam followers 6 work together and roll in their respective curved grooves 51, thereby increasing the supporting force of the roller bed and improving the supporting stability of the roller bed. The roller bed 1 is lifted and lowered under the action of the four cam followers 6, thereby improving its up and down movement stability.

[0031] In the present invention, the schematic diagram of the power transmission mechanism is as follows Figure 4 , Figure 5 and Figure 6 As shown, it includes a second bevel gear 8 respectively arranged at the bottom end of two camshafts 5 in each lifting tower 2, and a driving spur gear 10 arranged in the lifting tower 2, the central axis of the driving spur gear 10 is horizontal and connected to the motor 3 through the universal shaft 4, the driving spur gear 10 is meshed with two driven spur gears 9 on the left and right, the two driven spur gears 9 are respectively coaxially provided with a first bevel gear 7, and the two first bevel gears 7 are respectively meshed with a second bevel gear 8. The motor 3 rotates, and its power is transmitted to the camshaft through the power transmission mechanism, so that the two camshafts 5 in the same lifting tower 2 rotate in the same direction, and the cam follower 6 rolls relative to the curved groove, so that the roller bed 1 rises or falls.

[0032] In the present invention, the bottom of the spiral groove 51 is an arc-shaped surface, the cam follower 6 is cylindrical, and the end surface thereof extending into the spiral groove 51 is a spherical surface.

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

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 respectively arranged in the two lifting towers (2) for vertical rotation. A spiral curved groove (51) is provided on the surface of each camshaft (5). The curved grooves (51) of the two camshafts (5) in the same lifting tower (2) have the same rotation direction. Cam followers (6) are arranged in a rolling manner in the curved grooves. The cam followers (6) have the same height. The cam followers (6) extend from the lifting tower (2) and are fixedly connected to the roller bed (1). The motor (3) is located below the roller bed (1), and the motor (3) drives four camshafts (5) synchronously through a power transmission mechanism, and two camshafts (5) in the same lifting tower (2) rotate in the same direction.

2. The camshaft type smooth lifting roller bed according to claim 1, characterized in that: The power transmission mechanism comprises a second bevel gear (8) respectively arranged at the bottom end of two camshafts (5) in each lifting tower (2), and a driving spur gear (10) arranged in the lifting tower (2), the driving spur gear (10) being connected to the motor (3) via a universal shaft (4), the driving spur gear (10) being meshed with two driven spur gears (9) on the left and the right, the two driven spur gears (9) being respectively coaxially provided with a first bevel gear (7), and the two first bevel gears (7) being respectively meshed 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 helix 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 spiral groove (51) is an arc-shaped surface, the cam follower (6) is cylindrical, and its end surface extending into the spiral groove (51) is a spherical surface.

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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