Refrigerating unit

Abstract

The utility model provides a refrigerating unit. The refrigerating unit comprises an internal combustion engine, a motor, a belt and a connecting assembly. The internal combustion engine and the motor are vertically arranged. The driving end of the internal combustion engine and the driving end of the motor are arranged on the same side and are in transmission connection through a belt. The internal combustion engine and the motor are fixedly connected through a connecting assembly. The internal combustion engine and the motor are arranged up and down and are fixedly connected through the connecting assembly, so that relative vibration displacement between the internal combustion engine and the motor during operation is avoided, and the operation stability and reliability of the refrigerating unit are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration system, and particularly relates to a refrigeration unit. BACKGROUND

[0002] With the rapid development of cold chain logistics industry, the requirements for the operation reliability and environmental adaptability of refrigeration transport equipment for refrigeration units are increasing. At present, the technical scheme of driving the compressor by dual power sources of internal combustion engine and motor is generally adopted.

[0003] However, the dual power sources generally adopt a separate layout structure. Due to the vibration of the internal combustion engine, the relative distance between the motor and the clutch is in dynamic fluctuation, which causes the driving wheel train to continuously bear the additional alternating radial load caused by vibration, and causes high temperature and ablation of the belt wheel bearing, and even causes fire accidents, which significantly reduces the reliability and service life of the belt wheel train.

[0004] Therefore, it is necessary to design a refrigeration unit to solve the above technical problems. CONTENT OF THE INVENTION

[0005] The present application provides a refrigeration unit, which improves the stability and reliability of the operation of the refrigeration unit.

[0006] According to the embodiments of the present application, a refrigeration unit is provided, which comprises an internal combustion engine, a motor, a belt and a connecting assembly; the internal combustion engine and the motor are arranged in an up-down manner; the driving end of the internal combustion engine and the driving end of the motor are arranged on the same side and are drivingly connected through the belt; and the internal combustion engine and the motor are fixedly connected through the connecting assembly.

[0007] Further, the connecting assembly comprises a driving end support and a non-driving end support, and the driving end support and the non-driving end support are fixedly connected to the left and right sides of the internal combustion engine and the motor.

[0008] Further, the driving end support is provided with a flywheel connecting hole, a damping support, a positioning stop and a plurality of motor connecting holes; the flywheel connecting hole is formed at the top of the driving end support, the damping support is formed at the side of the driving end support, the positioning stop is coaxially arranged with the driving end of the motor, and the plurality of motor connecting holes are uniformly arranged around the positioning stop.

[0009] Further, the non-driving end support comprises a support plate, an upper mounting portion located at the middle of the upper surface of the support plate and a lower mounting portion extending downward from both sides of the lower surface of the support plate, the upper mounting portion is fixed on the internal combustion engine, and the lower mounting portion is fixed on the motor.

[0010] Further, the lower mounting part is formed with locally thickened mounting points, and a plurality of reinforcing ribs are arranged between the mounting points and the support plate, and an opening downwardly curved structure is formed between the two mounting points.

[0011] Further, the inner cavity is formed on one side of the internal combustion engine, and the bottom of the inner cavity is provided with a bottom wall, and the bottom wall is provided with a through hole, and the upper mounting part passes through the through hole and is fixed in the inner cavity by the clamping assembly.

[0012] Further, the maximum radial dimension of the upper mounting part in the through hole is smaller than the radial dimension of the through hole, and the radial dimension of the support plate is greater than the radial dimension of the through hole.

[0013] Further, the clamping assembly comprises a first clamping block, a second clamping block and a locking bolt axially fixed with the first clamping block and the second clamping block, and the upper surfaces of the first clamping block and the second clamping block are provided with downwardly inclined inner tapered surfaces, and the upper mounting part is provided with an outer tapered surface matched with the inner tapered surface.

[0014] Further, a support ring is further included, the bottom wall is provided with a stepped portion, the lower surface of the support ring abuts on the stepped portion, and the upper surface of the support ring is used to support the clamping assembly.

[0015] Further, the cross section of the through hole and the upper mounting part is circular.

[0016] The present application has the following beneficial effects: the internal combustion engine and the motor are arranged above and below, and then fixed and connected by the connecting assembly, so as to avoid the relative vibration displacement between the internal combustion engine and the motor during operation, and improve the stability and reliability of the refrigeration unit during operation.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present specification. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the present specification, and together with the specification, serve to explain the principles of the present specification.

[0019] Figure 1 is a structural schematic view of the refrigeration unit of the present application;

[0020] Figure 2 is a partial sectional view of the internal combustion engine of the present application;

[0021] Figure 3 is a structural schematic view of the drive end support of the present application;

[0022] Figure 4is a structural schematic diagram of the non-driving end support of the present application;

[0023] Figure 5 is a structural schematic diagram of the clamping assembly of the present application;

[0024] Figure 6 is a partial sectional view of the cooperation between the non-driving end support and the clamping assembly of the present application.

[0025] Legend of reference signs:

[0026] 10 - internal combustion engine; 11 - driving end; 12 - cavity; 121 - bottom wall; 122 - through hole; 123 - stepped portion;

[0027] 20 - motor; 21 - driving end;

[0028] 30 - belt;

[0029] 40 - connecting assembly; 41 - driving end support; 411 - flywheel connecting hole; 412 - shock absorbing support; 413 - positioning stop; 414 - motor connecting hole; 42 - non-driving end support; 421 - support plate; 422 - upper mounting portion; 423 - lower mounting portion; 424 - mounting point; 425 - reinforcing rib; 426 - outer conical surface;

[0030] 50 - clamping assembly; 51 - first clamping block; 511 - inner conical surface; 52 - second clamping block; 53 - locking bolt;

[0031] 60 - support ring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments (or, “modes of implementation”) of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0033] If the embodiments of the present application involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships, movement conditions, etc. between the components in a certain specific posture (as shown in the drawings); if the specific posture changes, the directional indications or positional relationships also change accordingly. In addition, the terms “first”, “second”, etc. in the embodiments of the present application are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0034] Next, the embodiments of the present specification will be described in detail.

[0035] Referring toFigure 1 As shown in the drawings, the application discloses a refrigeration unit, which comprises an internal combustion engine 10, an electric motor 20, a belt 30 and a connecting assembly 40. The internal combustion engine 10 and the electric motor 20 are arranged in an up-down manner, the driving end 11 of the internal combustion engine 10 and the driving end 21 of the electric motor 20 are arranged on the same side and are drivingly connected through the belt 30. The internal combustion engine 10 and the electric motor 20 are fixedly connected through the connecting assembly 40.

[0036] Please refer to Figure 2 As shown in the drawings, one side of the internal combustion engine 10 is inwardly recessed to form a cavity 12, the bottom of the cavity 12 is provided with a bottom wall 121, and the bottom wall 121 is provided with a through hole 122. In the embodiment, the cavity 12 and the through hole 122 are formed in the oil pan of the internal combustion engine 10.

[0037] Please refer to Figures 3-4 As shown in the drawings, the connecting assembly 40 comprises a driving end support 41 and a non-driving end support 42. The driving end support 41 is fixedly connected to the side where the driving end 11 (flywheel end) of the internal combustion engine 10 and the driving end 21 of the electric motor 20 are located, and the non-driving end support 42 is fixedly connected to the side where the non-driving end (crank pulley end) of the internal combustion engine 10 and the non-driving end of the electric motor 20 are located.

[0038] In the embodiment, the driving end support 41 and the non-driving end support 42 are independently and rigidly connected, which avoids the relative position change caused by independent fixing of the two supports, and further avoids the additional dynamic load on the transmission belt.

[0039] The driving end support 41 is provided with a flywheel connecting hole 411, a damping support 412, a positioning stop 413 and a plurality of motor connecting holes 414. The flywheel connecting hole 411 is formed at the top of the two ends of the driving end support 41 and is fixed on the internal combustion engine 10. The damping support 412 is formed on the side of the driving end support 41 and is used for being fixed on the frame of the refrigeration unit, so as to position the position of the electric motor 20 in the refrigeration unit. It should be pointed out that the damping support 412 for fixing the electric motor 20 in the refrigeration unit includes but is not limited to this, and two, three or four or the like can also be provided.

[0040] The positioning stop 413 is coaxially arranged with the driving end 21 of the electric motor 20, the driving end 21 of the electric motor 20 passes through the positioning stop 413 and is engaged with the belt 30. The end cover of the electric motor 20 is fixed on the driving end support 41 through the plurality of motor connecting holes 414. The plurality of motor connecting holes 414 are uniformly arranged around the positioning stop 413.

[0041] The non-driving end support 42 comprises a support plate 421, an upper mounting portion 422 extending upwardly from the middle of the upper surface of the support plate 421 and a lower mounting portion 423 extending downwardly from the two sides of the lower surface of the support plate 421. The upper mounting portion 422 is fixed on the internal combustion engine 10, and the lower mounting portion 423 is fixed on the electric motor 20.

[0042] The radial dimension of the support plate 421 is greater than the radial dimension of the through hole 122, so that the part of the non-driving end support 42 entering the through hole 122 is limited. At the same time, the contact area of the support plate 421 with the bottom of the internal combustion engine 10 is increased, the stress concentration is reduced, and the connection stability between the upper mounting portion 422 and the internal combustion engine 10 is improved.

[0043] The upper mounting portion 422 at least includes a first portion, a second portion and a third portion connected in sequence, and the first portion is fixed on the support plate 421. The radial dimension of the first portion gradually decreases towards the end close to the second portion, the radial dimension of the second portion is the same everywhere, and the radial dimension of the third portion is greater than that of the second portion. The connection between the second portion and the third portion forms an outer taper surface 426.

[0044] The maximum radial dimension of the upper mounting portion 422 located in the through hole 122 is less than the radial dimension of the through hole 122, that is, as shown in Figure 6 there is a gap a between the upper mounting portion 422 and the through hole 122. In this way, the dimensional deviation between the two lower mounting portions 423 and the motor 20 during installation can be compensated, and the assembly stress problem caused by axial movement can be solved.

[0045] In order for the upper mounting portion 422 to rotate freely in the through hole 122 in the embodiment, the angle deviation of the motor 20 and the internal combustion engine 10 in the axial direction is fully compensated, and the cross section of the through hole 122 and the upper mounting portion 422 is circular.

[0046] The lower mounting portion 423 is formed with a locally thickened mounting point 424, and a plurality of reinforcing ribs 425 are arranged between the mounting point 424 and the support plate 421. An opening downwardly curved structure is formed between the two mounting points 424, which is further matched with the circular arc-shaped outer contour of the motor 20.

[0047] Please refer to Figures 5-6 The refrigeration unit further includes a clamping assembly 50. The upper mounting portion 422 passes through the through hole 122 and is fixed in the cavity 12 by the clamping assembly 50. Since the cavity 12 in the embodiment is shaped on the side, the operation space is relatively sufficient, and the operation convenience of disassembly and assembly of the upper mounting portion 422 and the clamping assembly 50 is improved.

[0048] The clamping assembly 50 includes a first clamping block 51, a second clamping block 52 and a locking bolt 53, and the locking bolt 53 fixes the first clamping block 51 and the second clamping block 52 in the axial direction. The first clamping block 51 and the second clamping block 52 are arranged in a semicircular shape, and the upper surfaces of the first clamping block 51 and the second clamping block 52 are provided with downwardly inclined inner taper surfaces 511, and the outer taper surface 426 on the upper mounting portion 422 is matched with the inner taper surface 511.

[0049] The application bears the dynamic load generated by the motor 20 itself weight and vibration by the lower bottom surface of the first clamping block 51 and the second clamping block 52 and the step part 123, and only a small horizontal component force is balanced by the locking bolt 53, which significantly reduces the working stress of the locking bolt 53.

[0050] When the upper mounting part 422 penetrates from below through the through hole 122 on the internal combustion engine 10, the inner taper surface 511 on the first clamping block 51 and the second clamping block 52 contacts the outer taper surface 426 of the upper mounting part 422. With the continuous tightening of the locking bolts 53 on both sides, the two clamping blocks continue to approach, and the upper mounting part 422 moves upward under the support of the taper, and when the taper angle is less than the friction angle, self-locking is achieved. The taper angle here refers to the angle between the inner taper surface 511 and the horizontal plane.

[0051] The refrigeration unit also includes a support ring 60, and the bottom wall 121 is provided with a step part 123, the lower surface of the support ring 60 abuts on the step part 123, and the upper surface of the support ring 60 is used to support the clamping assembly 50. In some cases, the height of the first clamping block 51 and the second clamping block 52 can also be increased, so that the lower surface of the first clamping block 51 and the second clamping block 52 directly abuts on the step part 123. In other cases, the height of the bottom wall 121 can also be directly increased, instead of the height of the step part 123 and the support ring 60.

[0052] The application arranges the internal combustion engine 10 and the motor 20 upward and downward, and then fixes and connects them through the connecting assembly 40, which avoids the relative vibration displacement between the internal combustion engine 10 and the motor 20 during operation, and improves the stability and reliability of the refrigeration unit during operation.

[0053] The driving end 21 of the motor 20 is connected with the flywheel housing of the internal combustion engine 10 through the driving end support 41, and the non-driving end is connected with the oil pan hole seat through the non-driving end support 42. In this way, adaptive compensation of size deviation can be realized, and assembly stress and axial movement problems can be effectively eliminated. At the same time, the load state of the clamping assembly 50 is improved by the outer taper surface 426 and the inner taper surface 511, and the reliability of the refrigeration unit during operation is further improved.

[0054] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the application is not limited to the precise structures described in the above embodiments and shown in the drawings; any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. A refrigeration unit, characterized in that, The refrigeration unit comprises an internal combustion engine, an electric motor, a belt and a connecting assembly; the internal combustion engine and the electric motor are arranged in an up-down manner; the driving end of the internal combustion engine and the driving end of the electric motor are arranged on the same side and are connected through the belt transmission; the internal combustion engine and the electric motor are fixedly connected through the connecting assembly.

2. The refrigeration unit according to claim 1, wherein, the connecting assembly comprises a driving end support and a non-driving end support, and the driving end support and the non-driving end support are fixedly connected to the left and right sides of the internal combustion engine and the electric motor.

3. The refrigeration unit according to claim 2, wherein, a flywheel connecting hole, a damping support, a positioning stop and a plurality of motor connecting holes are arranged on the driving end support; the flywheel connecting hole is formed at the top of the driving end support; the damping support is formed on the side of the driving end support; the positioning stop is coaxially arranged with the driving end of the electric motor; and the plurality of motor connecting holes are evenly arranged around the positioning stop.

4. The refrigeration unit according to claim 2, wherein, the non-driving end support comprises a support plate, an upper mounting portion located at the middle of the upper surface of the support plate and a lower mounting portion extending downward from the two sides of the lower surface of the support plate; the upper mounting portion is fixed on the internal combustion engine; and the lower mounting portion is fixed on the electric motor.

5. The refrigeration unit according to claim 4, wherein, the lower mounting portion is formed with locally thickened mounting points, a plurality of reinforcing ribs are arranged between the mounting points and the support plate, and an opening downward arc structure is formed between the two mounting points.

6. The refrigeration unit according to claim 4, further comprising a clamping assembly; one side of the internal combustion engine is recessed inward to form a cavity, a bottom wall is arranged at the bottom of the cavity, a through hole is arranged on the bottom wall, and the upper mounting portion passes through the through hole and is fixed in the cavity through the clamping assembly.

7. The refrigeration unit according to claim 6, wherein, the maximum radial dimension of the upper mounting portion located in the through hole is smaller than the radial dimension of the through hole; and the radial dimension of the support plate is greater than the radial dimension of the through hole.

8. The refrigeration unit according to claim 6, wherein, the clamping assembly comprises a first clamping block, a second clamping block and a locking bolt for fixing the first clamping block and the second clamping block in the axial direction; the upper surfaces of the first clamping block and the second clamping block are provided with downwardly inclined inner tapered surfaces; and the upper mounting portion is provided with an outer tapered surface matched with the inner tapered surfaces.

9. The refrigeration unit according to claim 6, further comprising a support ring; a step portion is arranged on the bottom wall; the lower surface of the support ring abuts on the step portion; and the upper surface of the support ring is used for supporting the clamping assembly.

10. The refrigeration unit according to claim 6, wherein, the cross section of the through hole and the upper mounting portion is circular. ​ ​

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