Gear relay type rack speed change device

Abstract

The utility model discloses a gear relay type rack speed change device which comprises a machine frame, a plurality of gears, a plurality of middle transmission mechanisms, a rack and a guide rail, each gear comprises a gear shaft, the rack comprises a plurality of sliding blocks, and the guide rail comprises a sliding groove. The gear shafts are installed on the machine frame, the middle transmission mechanism is connected with the adjacent gear shafts, the guide rails are parallel to the machine frame, sliding blocks of the racks are matched in sliding grooves of the guide rails, and the racks are meshed with the gears. Parameters such as modulus, tooth number, number and axle distance of the gears and the racks and the transmission ratio of the intermediate transmission mechanism are set according to needs, and the effects that the racks are transmitted among the gears in a relay mode and the running speed changes in multiple stages can be achieved. The whole device has the advantages of being simple in structure and control, free of electrical devices and low in cost, and can be widely applied to various speed change scenes of mechanical transmission.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical transmission equipment technical field, especially relates to a gear relay type rack gear device. BACKGROUND

[0002] At present, the speed change device of the moving part in the mechanical transmission equipment is mainly the speed change device of electromechanical integration, especially the multi-section speed control of the moving part speed change precision requirement is higher, usually realizes through the special controller of the multiple electrical devices such as frequency converter or PLC adjustment motor speed. CONTENT OF UTILITY MODEL

[0003] Therefore, it is needed to provide a gear relay type rack gear device to solve the defects of the speed change device of electromechanical integration, such as structure and control complexity, more types and quantities of electrical devices and higher cost.

[0004] To achieve the above object, the inventor provides a gear relay type rack gear device, comprising a rack, a plurality of gears, a plurality of intermediate transmission mechanisms, a rack and a guide rail, the rack comprises a bottom plate and a top plate, the bottom plate and the top plate comprise a plurality of position opposite shaft holes, the gear comprises a gear shaft, the intermediate transmission mechanism comprises a driving wheel, a driven wheel and an intermediate transmission part, the rack comprises a plurality of sliders, the guide rail comprises a sliding groove;

[0005] The gear is installed in the shaft hole of the bottom plate and the shaft hole of the top plate through the gear shaft, the driving wheel and the driven wheel are installed on the gear shaft, the intermediate transmission part is connected with the driving wheel and the driven wheel on the adjacent gear shaft, the guide rail is arranged in parallel with the rack, the sliding groove faces the rack, the slider is fitted in the sliding groove, and the rack is engaged with the gear.

[0006] Further, the intermediate transmission mechanism is a meshing transmission mechanism.

[0007] The above-mentioned gear relay type rack gear device realizes the functions and effects of:

[0008] Firstly, by setting the appropriate axle distance of the gear shaft, the rack is driven by the engaged gear and disengaged from the engagement, and the rack is engaged with the gear driven by the rack, realizing the smooth transfer of the rack between two adjacent gears, and further realizing the movement of the rack under the relay driving of each gear.

[0009] Secondly, the intermediate transmission mechanism is a meshing transmission mechanism, which ensures that the driving wheel and the driven wheel are driven at a constant transmission ratio, and the transmission ratio of the intermediate transmission mechanism is set according to requirements, so that the rotation speed of each gear is different from the transmission ratio of the intermediate transmission mechanism connected thereto, and the running speed of the rack is different from the gear engaged therewith, thereby realizing the change of the movement speed of the rack.

[0010] Thirdly, the number of teeth of the gear is set to be even, so that the speed change device can realize multi-stage speed change.

[0011] Different from the prior art, the above technical scheme provides a gear relay type rack speed change device, which has the advantages of simple structure and control, no need for electrical devices, low cost, and wide application in various speed change scenes of mechanical transmission on the basis of meeting the speed change precision requirement of the moving parts of the mechanical transmission device. BRIEF DESCRIPTION OF DRAWINGS

[0012] ATTACHED Figure 1 It is a top view of the embodiment of the utility model.

[0013] ATTACHED Figure 2 It is a front view of the embodiment of the utility model.

[0014] ATTACHED Figure 3 It is an attached Figure 1 It is a section view of A-A in the embodiment of the utility model.

[0015] ATTACHED Figure 4 It is a process schematic view of the gear transmitting the rack in the embodiment of the utility model.

[0016] BRIEF DESCRIPTION OF DRAWINGS

[0017] 1. frame 2. bottom plate 3. top plate 4. gear 5. gear shaft 6. driving synchronous wheel 7. driven synchronous wheel 8. synchronous belt 9. rack 10. slider 11. guide rail 12. sliding groove 13. bearing 14. shaft hole DETAILED DESCRIPTION

[0018] In order to describe the technical content, structural features, implementation purposes and effects of the technical scheme in detail, the following will be described in detail in combination with specific embodiments and the drawings.

[0019] In the description of the present application, unless otherwise specified or explained, the term "several" refers to two or more than two; the terms "connection", "fitting", "mounting" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0020] In the description of the present specification, it needs to be understood that the "upper", "lower", "left", "right", "front", "rear" and other directional words described in the embodiments of the present application are described with the angle shown in the drawings, and should not be understood as a limitation on the embodiments of the present application.

[0021] Fig. 1 is a schematic diagram of the rack and pinion mechanism of the present application. Figure 1 and Fig. 2 is a schematic diagram of the rack and pinion mechanism of the present application. Figure 2 As shown in Fig. 1, the gear shaft 5 of the gear 4 is installed in the shaft hole 14 of the bottom plate 2 and the top plate 3 of the rack 1 through the bearing 13, the intermediate transmission mechanism is a synchronous belt wheel mechanism, the driving synchronous wheel 6 and the driven synchronous wheel 7 are installed on the gear shaft 5, the installation positions of the driving synchronous wheel 6 and the driven synchronous wheel 7 on the adjacent two gear shafts 5 are alternately up and down, the synchronous belt 8 as the intermediate transmission member connects the driving synchronous wheel 6 and the driven synchronous wheel 7, the guide rail 11 is arranged in parallel with the rack 1, the opening of the sliding groove 12 is opposite to the gear 4, and the initial installation state of all the gears 4 is that one tooth groove is uniformly upward, and the tooth at the rightmost end of the rack 9 is engaged with the left one of the upward tooth grooves of the left gear 4.

[0022] In the present embodiment, the module of the gear 4 is designed as 16, the number of teeth is 16, the axle distance of the gear shaft 5 is 402.12 mm (equal to half of the pitch circle circumference length 804.24 mm of the gear 4), the number of teeth of the rack 9 is 7, the length is 351.86 mm, and the transmission ratio of the synchronous belt wheel mechanism is 2.

[0023] Fig. 3 is a schematic diagram of the rack and pinion mechanism of the present application. Figure 3 As shown in Fig. 3, the sliding block 10 of the rack 9 is matched in the sliding groove 12 of the guide rail 11.

[0024] Fig. 4 is a schematic diagram of the rack and pinion mechanism of the present application. Figure 4 As shown in Fig. 4, when the left gear 4 shown in Fig. 3 rotates clockwise by 8 teeth, the middle gear 4 rotates clockwise by 4 teeth, and the right gear 4 rotates clockwise by 2 teeth, forming the state shown in Fig. 5. Figure 1 As shown in Fig. 5, all the gears 4 still have one tooth groove upward, the right one of the upward tooth grooves of the left gear 4 is disengaged from the tooth at the leftmost end of the rack 9, and the left one of the upward tooth grooves of the middle gear 4 is engaged with the tooth at the rightmost end of the rack 9. Figure 4 Fig. 6 is a schematic diagram of the rack and pinion mechanism of the present application.

[0025] As shown in Fig. 6, the engagement state of the rack 9 and the middle gear 4 is equivalent to the engagement state of the rack 9 and the left gear 4 shown in Fig. 3, and similarly, when the middle gear 4 rotates clockwise by 8 teeth again, the rack 9 is smoothly transmitted from the middle gear 4 to the right gear 4. Figure 4 Figure 1 Fig. 7 is a schematic diagram of the rack and pinion mechanism of the present application.

[0026] ​In the above transmission process, the running speed of the rack 9 undergoes a two-stage deceleration process, and when the entire device runs in reverse, the rack 9 is transmitted from the right gear 4 to the left gear 4, and the running speed of the rack 9 undergoes a two-stage acceleration process. In summary, the speed of the rack 9 when engaging with the left gear 4 is twice the speed when engaging with the middle gear 4, and four times the speed when engaging with the right gear 4. When the rotational speed of the left gear 4 is set to 30 rpm, the rotational speed of the middle gear 4 is 15 rpm, and the rotational speed of the right gear 4 is 7.5 rpm, the speed of the rack 9 when transmitted from the left gear 4 to the right gear 4 changes from 402.12 mm / s to 100.53 mm / s.

[0027] In other embodiments, the parameters and number of components such as gears 4 and racks 9 can be selected according to actual needs. In addition, the rack 9 is made of elastic material, and the frame 1 and the guide rail 11 are made into a curved shape, combined with the adjustment of the wheelbase of the gear shaft 5, the same relay transmission and speed change effect can be achieved.

[0028] According to the above structure, a gear relay type rack speed change device, by setting appropriate parameters such as the modulus, the number of teeth, the number, the wheelbase of the gears and the racks, and the transmission ratio of the synchronous pulley, can achieve the effect of smooth relay transmission of the rack between several gears and several stages of change in running speed. The entire device has the advantages of simple structure and control, no need for electrical components, and low cost, and can be widely applied to various speed change scenes of mechanical transmission.

[0029] It should be noted that although the above embodiments have been described in this paper, the patent protection scope of the present application is not limited thereby. Therefore, based on the innovative concept of the present application, changes and modifications to the embodiments described in this paper, or equivalent structures or equivalent process transformations made using the contents of the present application specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the protection scope of the present application patent.

Claims

1. A gear-relay rack and pinion speed change device, characterized in that: The device includes a frame, several gears, several intermediate transmission mechanisms, a rack, and a guide rail. The frame includes a base plate and a top plate, and the base plate and the top plate include several shaft holes with opposite positions. The gears include gear shafts. The intermediate transmission mechanisms include a driving wheel, a driven wheel, and an intermediate transmission component. The rack includes several sliders, and the guide rail includes a groove. The gear is mounted in the shaft hole of the base plate and the shaft hole of the top plate through the gear shaft. The driving wheel and the driven wheel are mounted on the gear shaft. The intermediate transmission component connects the driving wheel and the driven wheel on the adjacent gear shaft. The guide rail is arranged parallel to the frame. The slide groove faces the frame. The slider is engaged in the slide groove. The rack meshes with the gear.

2. The gear relay rack and pinion speed change device according to claim 1, characterized in that; The intermediate transmission mechanism is a meshing transmission mechanism.

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