Belt transmission structure box body

Abstract

The utility model discloses a belt transmission structure box body, which comprises an upper shell, a lower shell, an input shaft, a first bearing, a second bearing, a third bearing, a fourth bearing and an output shaft, the input shaft and the output shaft are rotatably arranged in a containing space defined by the upper shell and the lower shell, the first bearing and the second bearing are respectively sleeved at two ends of the input shaft, and the third bearing is arranged in the containing space. The third bearing and the fourth bearing are arranged at the two ends of the output shaft in a sleeving mode correspondingly, it is guaranteed that the concentricity of the input shaft and the output shaft is good, and the first bearing matching face, the second bearing matching face, the third bearing matching face and the fourth bearing matching face are in interference fit with the first bearing, the second bearing, the third bearing and the fourth bearing correspondingly. The lower shell is in interference fit with the matching surface of the bearing, the magnitude of interference of the plastic part and the magnitude of interference of the metal part are inconsistent, the plastic part is relatively large, the metal part is relatively small, and the risk that the bearing is loosened during operation and noise is generated is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission structures, in particular to a belt transmission structure box. Background Art

[0002] The belt drive on the market is generally divided into an upper shell and a lower shell, each supporting and limiting one end of the shaft. For example, for the same shaft at the input end, the upper shell has a bearing to support one end of the shaft, and the lower shell has a bearing to support the other end of the shaft. In such a structural box, because the upper shell and the lower shell are independent individuals, the error will become larger. The consequence of the increase is that the shaft is not concentric. When the shaft is not concentric, when the shaft is running and driving the belt to run, the noise may become louder. After long-term operation, the noise will become louder and louder. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of the utility model is to provide a belt transmission structure box.

[0004] To solve the above problems, the utility model adopts the following technical solutions.

[0005] A belt drive structure box, comprising an upper shell, a lower shell, an input shaft, a first bearing, a second bearing, a third bearing, a fourth bearing and an output shaft, wherein the input shaft and the output shaft are rotatably arranged in an accommodating space enclosed by the upper shell and the lower shell, the first bearing and the second bearing are respectively sleeved on both ends of the input shaft, the third bearing and the fourth bearing are respectively sleeved on both ends of the output shaft, and the lower shell is provided with a first bearing mating surface, a second bearing mating surface, a third bearing mating surface and a fourth bearing mating surface in sequence, and the first bearing mating surface, the second bearing mating surface, the third bearing mating surface and the fourth bearing mating surface are respectively interference fit with the first bearing, the second bearing, the third bearing and the fourth bearing.

[0006] As a further improvement of the utility model, it also includes a motor, and the motor shaft of the motor is connected to the input shaft.

[0007] As a further improvement of the utility model, a small pulley is sleeved on the first bearing, a large pulley is sleeved on the output shaft, and the small pulley and the large pulley are connected via a belt transmission.

[0008] As a further improvement of the utility model, the upper shell and the lower shell are connected by screws, ultrasonic welding or laser welding.

[0009] Beneficial effects of the utility model

[0010] Compared with the prior art, the advantages of the present invention are:

[0011] The shaft of the utility model has higher concentricity and lower noise during the operation of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 It is a schematic diagram of the structural disassembly of the utility model.

[0014] Figure 3 It is a cross-sectional view of the utility model.

[0015] Figure 4 This is a schematic diagram of the structure of a new lower shell used in this invention. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0017] See also Figures 1 to 4 A belt transmission structure box, comprising an upper shell 1, a lower shell 2, an input shaft 3, a first bearing 11, a second bearing 12, a third bearing 13, a fourth bearing 14 and an output shaft 4, wherein the input shaft 3 and the output shaft 4 are rotatably arranged in a containing space enclosed by the upper shell 1 and the lower shell 2, wherein the first bearing 11 and the second bearing 12 are respectively sleeved at both ends of the input shaft 3, and the third bearing 13 and the fourth bearing 14 are respectively sleeved at both ends of the output shaft 4, ensuring that the input shaft 3 and the output shaft have good concentricity, and the first shaft 11 and the second bearing 12 are respectively sleeved at both ends of the output shaft 4 ... The first bearing fitting surface 21, the second bearing fitting surface 22, the third bearing fitting surface 23, and the fourth bearing fitting surface 24 are respectively interference fit with the first bearing 11, the second bearing 12, the third bearing 13, and the fourth bearing 14. The lower shell 2 and the bearing fitting surfaces are interference fit. The interference amounts of plastic parts and metal parts are inconsistent. The plastic parts are relatively large and the metal parts are relatively small, which avoids the risk of loosening of the bearings during operation and causing noise.

[0018] Furthermore, a motor 5 is included, and a motor 5 shaft of the motor 5 is connected to the input shaft 3, which can be connected by a coupling or a planetary gear train gear box, etc., which is not a mandatory requirement here.

[0019] Further, a small pulley 6 is sleeved on the first bearing 11, a large pulley 7 is sleeved on the output shaft 4, and the small pulley 6 and the large pulley 7 are connected by a belt 8. The input shaft 3 is respectively fitted with the holes of the first bearing 11, the second bearing 12 and the small pulley 6 by interference fit; the output shaft 4 is respectively fitted with the holes of the third bearing 13, the fourth bearing 14 and the large pulley 7 by interference fit, so that the input shaft 3 and the small pulley 6, the output shaft 4 and the large pulley 7 will not fall off or move up and down during transmission, thereby avoiding the generation of noise.

[0020] Furthermore, the upper shell 1 and the lower shell 2 are connected by screws, ultrasonic welding or laser welding.

[0021] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A belt drive structure box, characterized in that: The invention comprises an upper shell, a lower shell, an input shaft, a first bearing, a second bearing, a third bearing, a fourth bearing and an output shaft. The input shaft and the output shaft are rotatably arranged in an accommodation space enclosed by the upper shell and the lower shell. The first bearing and the second bearing are respectively sleeved on both ends of the input shaft. The third bearing and the fourth bearing are respectively sleeved on both ends of the output shaft. A first bearing fitting surface, a second bearing fitting surface, a third bearing fitting surface and a fourth bearing fitting surface are sequentially arranged on the lower shell. The first bearing fitting surface, the second bearing fitting surface, the third bearing fitting surface and the fourth bearing fitting surface are respectively interference fit with the first bearing, the second bearing, the third bearing and the fourth bearing.

2. The belt transmission structure box according to claim 1, characterized in that: A motor is also included, wherein a motor shaft of the motor is connected to the input shaft.

3. The belt transmission structure box according to claim 1, characterized in that: A small pulley is sleeved on the first bearing, a large pulley is sleeved on the output shaft, and the small pulley is connected to the large pulley through a belt transmission.

4. The belt transmission structure box according to claim 1, characterized in that: The upper shell and the lower shell are connected by screws, ultrasonic welding or laser welding.

Images