Reciprocating mechanism and compression device

Abstract

The utility model relates to a reciprocating mechanism and a compression device, the reciprocating mechanism comprises a rotary transmission part, a reciprocating body, a first rolling part and a second rolling part, the rotary transmission part is provided with a first guide groove and a second guide groove, and the tracks of the first guide groove and the second guide groove are provided with wave crests and wave troughs which are staggered in the circumferential direction of the rotary transmission part; the reciprocating body is provided with a first mounting part and a second mounting part which are relatively fixed; the first rolling piece is arranged on the first mounting part and is matched with the first guide groove; the second rolling piece is arranged on the second mounting part and is matched with the second guide groove; when the rotating transmission part rotates, the displacement variation of the first rolling part and the displacement variation of the second rolling part in the axial direction of the rotating transmission part are equal. According to the reciprocating mechanism and the compression device, in the rotating process of the rotating transmission part, the first rolling part moving along the first guide groove and the second rolling part moving along the second guide groove can achieve the stable supporting effect at different positions of the peripheral side of the corresponding rotating transmission part correspondingly, so that the movement stability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a reciprocating mechanism and a compression device. Background Art

[0002] A compressor is a driven fluid machine that pumps low-pressure gas to high-pressure gas. A reciprocating mechanism is typically used to achieve the reciprocating motion of the piston within the cylinder. Therefore, the stability of the reciprocating mechanism and the strength of the output axial force both affect the compressor's performance.

[0003] In the related art, the reciprocating mechanism adopted by the compressor has poor stability and is difficult to adapt to the stable working requirements under heavy loads. Summary of the Invention

[0004] Based on this, it is necessary to provide a reciprocating mechanism and a compression device to address the problem of poor stability, so as to improve working stability.

[0005] In one aspect, the present application provides a reciprocating mechanism, comprising:

[0006] A rotary transmission member, wherein a first guide groove and a second guide groove are provided on a circumferential surface of the rotary transmission member, the first guide groove and the second guide groove are spaced apart along the axial direction of the rotary transmission member, and the trajectories of the first guide groove and the second guide groove are both closed curves that encircle the rotary transmission member, the closed curves having peaks and troughs staggered in the axial and circumferential directions of the rotary transmission member, and the peaks in the trajectory of the first guide groove and the peaks in the trajectory of the second guide groove are staggered in the circumferential direction of the rotary transmission member;

[0007] A reciprocating body, wherein the reciprocating body is provided with a first mounting portion and a second mounting portion that are relatively fixed;

[0008] a first rolling element, the first rolling element being disposed on the first mounting portion and cooperating with the first guide groove;

[0009] a second rolling member, the second rolling member being disposed on the second mounting portion and cooperating with the second guide groove;

[0010] When the rotary transmission member rotates, the first rolling member moves along the first guide groove, the second rolling member moves along the second guide groove, and the displacement changes of the first rolling member and the second rolling member in the axial direction of the rotary transmission member are equal.

[0011] In one embodiment, the trajectories of the first guide groove and the second guide groove are both sinusoidal curves with the same amplitude, and the number of peaks and troughs in the trajectories of the first guide groove and the second guide groove are equal. In the axial direction of the rotating transmission member, the peaks in the trajectory of the first guide groove are opposite to the troughs in the trajectory of the second guide groove.

[0012] In one embodiment, the number of the first rolling elements and the number of the second rolling elements are both 2, and the line connecting the two first rolling elements and the line connecting the two second rolling elements both intersect the center line of the rotating transmission element at right angles.

[0013] In one embodiment, the reciprocating mechanism further includes a base, a box and a guide assembly, the box is connected to the base to enclose a movable space, the rotating transmission member, the reciprocating body and the guide assembly are all arranged in the movable space, the rotating transmission member is axially limited to the base, and when the rotating transmission member rotates relative to the base, the reciprocating body reciprocates along the guide assembly in the movable space under the drive of the rotating transmission member.

[0014] In one embodiment, the guide assembly includes at least two guide rods, each of which has two ends connected to the base and the box, and the guide rods are parallel to the axial direction of the rotating transmission member, and the reciprocating body is slidably connected to the guide rods.

[0015] In one embodiment, the guide rod is provided between any adjacent first rolling elements and second rolling elements in the circumferential direction of the rotary transmission element.

[0016] In one embodiment, the base is rotatably provided with a rotating member, the rotating member is connected to the rotating transmission member, and the rotating member is used to drive the rotating transmission member to rotate relative to the base.

[0017] In one embodiment, the base is provided with a first plane bearing, a second plane bearing, a first rolling bearing and a second rolling bearing arranged coaxially, the rotating member includes a rotating disk and a rotating shaft connected coaxially, the first plane bearing and the second plane bearing are axially clamped between the rotating disk and the rotating transmission member, the first rolling bearing is sleeved between the circumferential side wall of the rotating disk and the inner wall of the base, and the second rolling bearing is sleeved between the circumferential side wall of the rotating shaft and the inner wall of the base.

[0018] In one embodiment, a mounting hole and a latching protrusion located on the periphery of the mounting hole are formed at the end of the rotating transmission member facing the rotating disk, an end of the rotating shaft away from the rotating disk is passed through the mounting hole, and the second rolling bearing is sleeved between the outer peripheral wall of the latching protrusion and the inner wall of the base.

[0019] On the other hand, the present application provides a compression device, including a cylinder, a piston and a reciprocating mechanism as described above, wherein the piston is arranged in the cylinder and connected to the reciprocating body. When the rotating transmission member rotates, the piston reciprocates under the drive of the reciprocating body.

[0020] The above-mentioned reciprocating mechanism and compression device adopt a staggered arrangement of the first guide groove and the second guide groove on the rotating transmission member, so that the peaks in the trajectory of the first guide groove and the peaks in the trajectory of the second guide groove are staggered in the axial direction of the rotating transmission member. Therefore, during the rotation of the rotating transmission member, the first rolling member moving along the first guide groove and the second rolling member moving along the second guide groove can respectively play a stabilizing supporting effect at different positions on the circumference of the corresponding rotating transmission member, so that the reciprocating body is more stable in the axial direction under the drive of the first rolling member and the second rolling member; moreover, the displacement changes of the first rolling member and the second rolling member in the axial direction of the rotating transmission member are equal, so that the axial driving pace of the rotating transmission member by the first rolling member and the second rolling member is coordinated and consistent, reducing the probability of the rotating transmission member being stuck, so as to improve the reliability of the reciprocating motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0022] FIG1 is a schematic diagram of the assembly structure of a reciprocating mechanism in one embodiment of the present application.

[0023] FIG2 is a schematic diagram of the exploded structure of the reciprocating mechanism according to one embodiment of the present application.

[0024] FIG3 is a schematic diagram showing the arrangement positions of the first rolling element and the second rolling element relative to the reciprocating body in the reciprocating mechanism according to an embodiment of the present application.

[0025] FIG4 is a schematic structural diagram of a rotating transmission member in a reciprocating mechanism according to an embodiment of the present application.

[0026] FIG5 is a schematic structural diagram of a rotary transmission member of a reciprocating mechanism according to an embodiment of the present application from another perspective.

[0027] FIG6 is a schematic cross-sectional view of a compression device in another embodiment of the present application.

[0028] FIG7 is a schematic structural diagram of the compression device shown in FIG6 when the piston is located at another position.

[0029] Description of Figure Numbers:

[0030] 10. Reciprocating mechanism; 10a. Base; 11. Rotating transmission member; 11a. First guide groove; 11b. Second guide groove; 111. Mounting hole; 112. Clamping protrusion; 12. Reciprocating body; 12a. First mounting portion; 12b. Second mounting portion; 12c. Linear bearing; 121. Mounting groove; 122. Ball sleeve; 123. Ball; 124. Cover; 13. First rolling element; 14. Second rolling element; 14a. First plane bearing; 14b. Two-plane bearing; 14c, first rolling bearing; 14d, second rolling bearing; 141, through hole; 141a, necking section; 141b, first step groove; 141c, second step groove; 15, housing; 15a, shaft hole; 16, guide assembly; 16a, guide rod; 17, rotating part; 171, rotating disk; 172, rotating shaft; 18, bushing; 19, grid ring; 100, compression device; 20, cylinder body; 30, piston; 40, piston rod. DETAILED DESCRIPTION

[0031] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply 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 a limitation on this application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0034] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0037] As shown in Figures 1 and 2, a reciprocating mechanism 10 provided in one embodiment of the present application includes a rotating transmission member 11, a reciprocating body 12, a first rolling member 13 and a second rolling member 14. The circumferential surface of the rotating transmission member 11 is provided with a first guide groove 11a and a second guide groove 11b. The first guide groove 11a and the second guide groove 11b are arranged at intervals along the axial direction of the rotating transmission member 11, and their trajectories are both closed curves that circle the rotating transmission member 11. The reciprocating body 12 is provided with a relatively fixed first mounting portion 12a and a second mounting portion 12b. The first mounting portion 12a and the second mounting portion 12b are used to mount the first rolling member 13 and the second rolling member 14, respectively. It is understandable that the first mounting portion 12a can be multiple, so as to meet the need of mounting multiple first rolling members 13. Correspondingly, the second mounting portion 12b can be multiple, so as to meet the need of mounting multiple second rolling members 14.

[0038] In the embodiment of the present application, the first rolling member 13 is disposed on the first mounting portion 12a and engages with the first guide groove 11a. The second rolling member 14 is disposed on the second mounting portion 12b and engages with the second guide groove 11b. The first rolling member 13 and the first guide groove 11a are engaged in a rolling engagement, while the second rolling member 14 and the second guide groove 11b are engaged in a rolling engagement. This reduces friction when the first rolling member 13 moves along the first guide groove 11a, and reduces friction when the second rolling member 14 moves along the second guide groove 11b, thereby improving the smoothness of the reciprocating motion of the reciprocating member 12 in the reciprocating mechanism 10.

[0039] As shown in Figures 3 and 4 , the closed curve has peaks and troughs that are staggered in the axial and circumferential directions of the rotary transmission member 11. The peaks in the trajectory of the first guide groove 11a and the peaks in the trajectory of the second guide groove 11b are staggered in the circumferential direction of the rotary transmission member 11. Therefore, during the rotation of the rotary transmission member 11, the first rolling member 13 moving along the first guide groove 11a and the second rolling member 14 moving along the second guide groove 11b can provide stable support at different locations on the circumference of the corresponding rotary transmission member 11, thereby ensuring more stable axial movement of the reciprocating member 12 driven by the first and second rolling members 13 and 14.

[0040] It should be noted that in the reciprocating mechanism 10 of the embodiment of the present application, when the rotary transmission member 11 rotates, the first rolling member 13 moves along the first guide groove 11a, and the second rolling member 14 moves along the second guide groove 11b. The first and second rolling members 13, 14 experience equal axial displacement changes in the rotary transmission member 11. This allows the first and second rolling members 13, 14 to drive the rotary transmission member 11 axially in a coordinated and consistent manner, reducing the chance of the rotary transmission member 11 becoming stuck and improving the reliability of the reciprocating motion.

[0041] As shown in Figures 4 and 5, the trajectories of the first guide groove 11a and the second guide groove 11b are both sinusoidal curves with the same amplitude. In this way, the trajectories of the first guide groove 11a and the second guide groove 11b are sinusoidal curves. On the one hand, this arrangement ensures that the first guide groove 11a and the second guide groove 11b respectively guide the periodic movement of the first rolling element 13 and the second rolling element 14 to realize the reciprocating motion of the reciprocating body 12. On the other hand, with this structural design, the trajectories of the first rolling element 13 and the second rolling element 14 when rolling along the first guide groove 11a and the second guide groove 11b respectively are relatively smooth, thereby avoiding situations such as ball jumping or jamming. Since the amplitudes of the sinusoidal curves corresponding to the trajectories of the first guide groove 11a and the second guide groove 11b are the same, it is only necessary to set the first rolling element 13 and the second rolling element 14 at the peak position or the trough position of the first guide groove 11a and the second guide groove 11b respectively, so that when the rotating transmission member 11 rotates, the displacement change of the first rolling element 13 along the first guide groove 11a in the axial direction of the rotating transmission member 11 can be kept consistent with the displacement change of the second rolling element 14 along the second guide groove 11b in the axial direction of the rotating transmission member 11. Therefore, this structural setting is conducive to determining the installation position of the first rolling element 13 and the second rolling element 14 relative to the rotating transmission member 11, making the assembly of the reciprocating mechanism 10 more convenient.

[0042] It should be noted that the number of peaks and troughs in the trajectories of the first guide groove 11a and the second guide groove 11b are equal. Specifically, the number of peaks in the trajectory of the first guide groove 11a is equal to the number of troughs in the trajectory of the first guide groove 11a, and the number of peaks in the trajectory of the second guide groove 11b is the same as the number of troughs in the trajectory of the second guide groove 11b, and is consistent with the number of peaks in the trajectory of the first guide groove. In this embodiment, in the axial direction of the rotating transmission member 11, the peaks in the trajectory of the first guide groove 11a are opposite to the troughs in the trajectory of the second guide groove 11b. In this way, when the first rolling member 13 is located at the trough position of the first guide groove 11a, the second rolling member 14 is located at the trough position of the second guide groove 11b, and the first rolling member 13 and the second rolling member 14 are staggered with each other in the circumferential direction of the rotating transmission member 11.

[0043] In the embodiment of the present application, the first rolling member 13 and the second rolling member 14 are staggered with respect to each other in the circumferential direction of the rotating transmission member 11, which means that the line connecting the first rolling member 13 and the second rolling member 14 is not parallel to the center line of the rotating transmission member 11. In other words, the first rolling member 13 and the second rolling member 14 have different positions in the circumferential direction of the corresponding rotating transmission member 11.

[0044] In some embodiments, the number of the first rolling elements 13 and the second rolling elements 14 are both two, and the line connecting the two first rolling elements 13 and the line connecting the two second rolling elements 14 both intersect perpendicularly with the centerline of the rotating transmission member 11. In this embodiment, the two first rolling elements 13 and the two second rolling elements 14 can support and position the reciprocating body 12 and the rotating transmission member 11 in two perpendicular directions perpendicular to the centerline of the rotating transmission member 11, so that the reciprocating body 12, driven by the rotating transmission member 11, can move smoothly in the axial direction and is less likely to wobble in the radial direction, thereby maintaining good motion stability of the reciprocating body 12 along the axial direction of the rotating transmission member 11.

[0045] Referring again to FIG. 2 , the reciprocating mechanism 10 further includes a base 10a, a housing 15, and a guide assembly 16. The housing 15 is connected to the base 10a to enclose an activity space, and the rotating transmission member 11, the reciprocating body 12, and the guide assembly 16 are all arranged in the activity space. In this embodiment, the activity space enclosed by the housing 15 and the base 10a can provide space for assembly and movement of the rotating transmission member 11, the reciprocating body 12, and the guide assembly 16, thereby improving the assembly stability between these structures. At the same time, under this structural setting, the structural members in the activity space are not easily infiltrated by dust, so that this structural setting of the housing 15 and the base 10a is beneficial to the dustproofing of the reciprocating mechanism 10. In some embodiments, sealing rings, sealing rings, and other structures can also be provided at corresponding positions of the housing 15 and the base 10a for waterproofing.

[0046] The rotating transmission member 11 is axially limited to the base 10a, that is, the rotating transmission member 11 will not move axially relative to the base 10a, so that when the rotating transmission member 11 rotates relative to the base 10a, the rotational energy can be transmitted to the first rolling member 13 and the second rolling member 14 through the first guide groove 11a and the second guide groove 11b as much as possible, thereby maximizing the displacement change of the first rolling member 13 and the second rolling member 14 in the axial direction of the rotating transmission member 11, which is beneficial to maximizing the reciprocating motion stroke of the reciprocating body 12, thereby improving the transmission efficiency of the reciprocating mechanism 10.

[0047] In the above embodiment, when the rotary transmission member 11 rotates relative to the base 10a, the reciprocating body 12 reciprocates within the movable space along the guide assembly 16 driven by the rotary transmission member 11. Since the guide assembly 16 has a guiding and supporting effect on the reciprocating body 12, the stability of the reciprocating mechanism 10 is further improved.

[0048] Continuing to refer to FIG2 , the guide assembly 16 includes at least two guide rods 16a, and the two ends of each guide rod 16a are respectively connected to the base 10a and the box body 15. In this embodiment, the guide rods 16a are parallel to the axial direction of the rotating transmission member 11, and the reciprocating body 12 is slidably connected to the guide rods 16a. In this way, when the rotating transmission member 11 rotates, the reciprocating body 12 slides smoothly along the guide rods 16a. The reciprocating body 12 and the guide rods 16a can be slidably connected through linear bearings 12c, so that the linear bearings 12c are used to reduce the sliding friction between the reciprocating body 12 and the guide rods 16a, reduce the heat loss during the movement of the reciprocating mechanism 10, and improve the energy conversion rate. The reciprocating body 12 is a cavity with an inner cavity, and the rotating transmission member 11 is located in the inner cavity. The side wall of the reciprocating body 12 is provided with a mounting groove 121 that penetrates the inner cavity. The first mounting portion 12a and the second mounting portion 12b both have the mounting groove 121, so as to facilitate the installation of the first rolling element 13 and the second rolling element 14 from the outside of the reciprocating body 12 into the corresponding mounting groove 121, so that the first rolling element 13 and the second rolling element 14 respectively match the first guide groove 11a and the second guide groove 11b.

[0049] As shown in conjunction with Figures 2 and 3 , in some embodiments, multiple balls 123 are disposed within the mounting grooves 121 at the first mounting portion 12a and the second mounting portion 12b, respectively, via ball sleeves 122. The multiple balls 123 disposed on the first mounting portion 12a abut against the first rolling element 13, thereby improving the smoothness of movement of the first rolling element 13 along the first guide groove 11a. Correspondingly, the multiple balls 123 disposed on the second mounting portion 12b abut against the second rolling element 14, thereby improving the smoothness of movement of the second rolling element 14 along the second guide groove 11b. A cover 124 is provided at the mounting groove 121. After the multiple balls 123 are disposed within the corresponding mounting grooves 121 using the ball sleeves 122, the notch of the mounting groove 121 can be sealed 124 with an end cap to prevent the ball sleeves 122 from detaching from the mounting groove 121. Of course, in some embodiments, after the ball sleeve 122 installs the plurality of balls 123 into the installation groove 121 , the ball sleeve 122 can be fixed to the reciprocating body 12 by means of clamping or welding.

[0050] The first rolling element 13 and the second rolling element 14 may be balls. It is understood that the diameter of the balls is larger than the diameter of the rolling balls 123, so that the multiple rolling balls 123 abut against the surface of the balls. In this way, when the balls roll, the rolling balls 123 can reduce the friction between the balls and the reciprocating body 12, thereby reducing the sticking phenomenon.

[0051] A guide rod 16a is provided between any adjacent first and second rolling elements 13, 14 along the circumference of the rotary transmission member 11. In this embodiment, the guide rods 16a are provided in the space created by the staggered arrangement of the first and second rolling elements 13, 14 along the circumference of the rotary transmission member 11, thereby eliminating the need for additional space within the reciprocating mechanism 10. This structural arrangement improves the space utilization of the active space enclosed by the housing 15 and the base 10a, and allows the guide rods 16a to provide support and guidance for the reciprocating member 12, thereby enhancing the stability of the reciprocating member 12's reciprocating motion within the active space.

[0052] In an embodiment where the reciprocating mechanism 10 is provided with two first rolling elements 13 and two second rolling elements 14, the two first rolling elements 13 are spaced 180° apart in the circumferential direction of the rotating transmission member 11, and the two second rolling elements 14 are spaced 180° apart in the circumferential direction of the rotating transmission member 11. Furthermore, any adjacent first rolling elements 13 and second rolling elements 14 are spaced 90° apart in the circumferential direction of the rotating transmission member 11. In this case, the reciprocating element 12 is supported by four supporting forces perpendicular to the axial direction of the rotating transmission member 11, and each supporting force is evenly distributed in the axial direction around the rotating transmission member 11, thereby ensuring good stability in the axial movement of the reciprocating element 12 relative to the rotating transmission member 11.

[0053] Furthermore, the guide rod 16a is disposed midway between the adjacent first and second rolling elements 13, 14 in the circumferential direction of the corresponding reciprocating body 12. That is, in the axial direction of the rotating transmission member 11, the guide rod 16a is spaced 45° apart from the first rolling element 13, and the guide rod 16a is spaced 45° apart from the second rolling element 14. In this manner, the first and second rolling elements 13, 14, and guide rod 16a are all arranged in rotationally symmetrical fashion within the reciprocating mechanism 10 about the axial direction of the rotating transmission member 11. This helps maintain consistent structural weight distribution in all directions of the reciprocating mechanism 10, thereby reducing the occurrence of centrifugal bias during operation of the reciprocating mechanism 10 and, therefore, helps maintain the overall stability of the reciprocating mechanism 10 during operation.

[0054] 6 , in some embodiments, the base 10 a is rotatably provided with a rotating member 17 , which is connected to the rotating transmission member 11 , and is used to drive the rotating transmission member 11 to rotate relative to the base 10 a .

[0055] In this embodiment, since rotating member 17 is rotatably connected to base 10a, thus enabling the rotational motion of rotating transmission member 11, only the connection between rotating transmission member 11 and rotating member 17 needs to be considered. This allows rotating transmission member 11 to be machined separately, facilitating the machining of first guide groove 11a and second guide groove 11b. Accordingly, the rotational coordination of rotating member 17 with base 10a does not require consideration of the structural shape of rotating transmission member 11. During assembly, rotating transmission member 11 and rotating member 17 can be assembled separately, avoiding the inconvenience that can arise when rotating member 17 and rotating transmission member 11 are assembled integrally.

[0056] It should be noted that the rotating member 17 can be the output shaft of the motor, or an intermediate connecting member for linkage with the output shaft of the motor, as long as the rotating member 17 can rotate relative to the base 10a to drive the rotating transmission member 11 to rotate.

[0057] Continuing with FIG6 , in some embodiments, the base 10a is provided with a coaxially arranged first planar bearing 14a, a second planar bearing 14b, a first rolling bearing 14c, and a second rolling bearing 14d. The rotating member 17 includes a coaxially connected rotating disk 171 and a rotating shaft 172. The first planar bearing 14a and the second planar bearing 14b are axially interposed between the rotating disk 171 and the rotating transmission member 11. The first rolling bearing 14c is sleeved between the circumferential sidewall of the rotating disk 171 and the inner wall of the base 10a, while the second rolling bearing 14d is sleeved between the circumferential sidewall of the rotating shaft 172 and the inner wall of the base 10a.

[0058] As shown in Figure 6 , the base 10a is provided with a through hole 141 for mounting the rotating member 17. The through hole 141 has a tapered section 141a, with a first stepped groove 141b and a second stepped groove 141c formed at either end. A first planar bearing 14a is disposed within the first stepped groove 141b. One surface of the first planar bearing 14a axially abuts against the rotating disk 171, while the other surface maintains a clearance between the rotating shaft 172, thereby preventing rotational interference between the rotating shaft 172 and the base 10a. A second planar bearing 14b is disposed within the second stepped groove 141c. One surface of the second planar bearing 14b axially abuts against the rotating transmission member 11, while the other surface maintains a clearance between the rotating shaft 172, thereby preventing rotational interference between the rotating shaft 172 and the base 10a.

[0059] In some embodiments, the end of the rotary transmission member 11 facing the rotating disk 171 is formed with a mounting hole 111 and a latching protrusion 112. The end of the rotating shaft 172 facing away from the rotating disk 171 is inserted into the mounting hole 111. The latching protrusion 112 is located on the periphery of the mounting hole 111. The second rolling bearing 14d is sleeved between the outer peripheral wall of the latching protrusion 112 and the inner wall of the base 10a. In this embodiment, the second rolling bearing 14d enables the rotary transmission member 11 to rotate smoothly relative to the base 10a. In this embodiment, the end surface of the latching protrusion 112 abuts against the second planar bearing 14b.

[0060] The shaft 172 and the mounting hole 111 of the rotating transmission member 11 can be connected by means of clamping or welding, or can be locked by a nut after the shaft 172 passes through the mounting hole 111. The connection method between the shaft 172 and the rotating transmission member 11 is not limited here.

[0061] In conjunction with Figures 6 and 7, based on the reciprocating mechanism 10 of any one of the above-mentioned embodiments, the present application provides a compression device 100. Specifically, the compression device 100 includes a reciprocating mechanism 10, a cylinder body 20, and a piston 30. The piston 30 is arranged in the cylinder body 20, and the piston 30 is connected to the reciprocating body 12. When the rotating transmission member 11 rotates, the piston 30 is driven by the reciprocating body 12 to reciprocate in the cylinder body 20, so that the reciprocating motion of the piston 30 in the cylinder body 20 can be used to pump and compress the fluid such as gas or liquid in the cylinder body 20. In this way, the opening and closing of the fluid inlet and fluid outlet provided on the cylinder body 20 can be coordinated to achieve the effect of continuously compressing and pumping the fluid.

[0062] Since the reciprocating mechanism 10 mentioned above moves stably and reliably, when the compression device 100 using the reciprocating mechanism 10 performs compression operation, the compression device 100 has good stability.

[0063] The compression device 100 also includes a piston rod 40, through which the piston 30 and the reciprocating body 12 can be connected. Specifically, one end of the piston rod 40 is connected to the reciprocating body 12, and the other end of the piston rod 40 is connected to the piston 30. The piston rod 40 and the reciprocating body 12 can be connected by threaded connection, hot melt connection or snap connection, or the piston rod 40 and the reciprocating body 12 can be connected by bolts. The piston 30 can be threadedly connected to the piston rod 40 or can be snap-fitted to the piston rod 40. The connection method between the piston rod 40 and the piston 30, and the connection method between the piston rod 40 and the reciprocating body 12 are not limited here.

[0064] In some embodiments, the housing 15 is provided with an axial hole 15a through which the piston rod 40 extends, and a bushing 18 is provided between the inner wall of the axial hole 15a and the outer wall of the piston rod 40. The bushing 18 seals the gap between the inner wall of the axial hole 15a and the outer wall of the piston rod 40, thereby achieving waterproof and dustproof effects.

[0065] The bushing 18 can be made of wear-resistant materials such as plastic or rubber.

[0066] In some embodiments, a Glyd ring 19 may be further disposed within the shaft hole 15a and sleeved around the piston rod 40 to further enhance the sealing effect. It should be noted that the Glyd ring 19 has low friction, no creeping, low starting force, and is resistant to high pressure. Thus, while the Glyd ring 19 seals the piston rod 40 and the shaft hole 15a, it does not hinder the smooth telescopic movement of the piston rod 40 relative to the housing 15 driven by the reciprocating body 12.

[0067] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the inventive concept of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A reciprocating mechanism, characterized in that: The reciprocating mechanism comprises: A rotary transmission member, wherein a first guide groove and a second guide groove are provided on a circumferential surface of the rotary transmission member, the first guide groove and the second guide groove are arranged at intervals along the axial direction of the rotary transmission member, and the trajectories of the first guide groove and the second guide groove are closed curves that surround the rotary transmission member, the closed curve has crests and troughs that are staggered in the axial direction and circumferential direction of the rotary transmission member, and the crests in the trajectory of the first guide groove and the crests in the trajectory of the second guide groove are staggered in the circumferential direction of the rotary transmission member; A reciprocating body, wherein the reciprocating body is provided with a first mounting portion and a second mounting portion that are relatively fixed; a first rolling member, the first rolling member being disposed on the first mounting portion and cooperating with the first guide groove; a second rolling member, the second rolling member being disposed on the second mounting portion and cooperating with the second guide groove; When the rotating transmission member rotates, the first rolling member moves along the first guide groove, the second rolling member moves along the second guide groove, and the displacement changes of the first rolling member and the second rolling member in the axial direction of the rotating transmission member are equal.

2. The reciprocating mechanism according to claim 1, characterized in that: The trajectories of the first guide groove and the second guide groove are both sinusoidal curves with the same amplitude, and the number of peaks and troughs in the trajectories of the first guide groove and the second guide groove is equal. In the axial direction of the rotating transmission member, the peaks in the trajectory of the first guide groove are opposite to the troughs in the trajectory of the second guide groove.

3. The reciprocating mechanism according to claim 1 or 2, characterized in that: The number of the first rolling elements and the number of the second rolling elements are both 2, and a line connecting the two first rolling elements and a line connecting the two second rolling elements both intersect perpendicularly with a center line of the rotating transmission element.

4. The reciprocating mechanism according to claim 3, characterized in that: The reciprocating mechanism also includes a base, a box and a guide assembly. The box is connected to the base to enclose an activity space. The rotating transmission member, the reciprocating body and the guide assembly are all arranged in the activity space. The axial limit of the rotating transmission member is located at the base, and when the rotating transmission member rotates relative to the base, the reciprocating body reciprocates along the guide assembly in the activity space under the drive of the rotating transmission member.

5. The reciprocating mechanism according to claim 4, characterized in that: The guide assembly includes at least two guide rods, both ends of each guide rod are respectively connected to the base and the box body, and the guide rods are parallel to the axial direction of the rotating transmission member, and the reciprocating body is slidably connected to the guide rods.

6. The reciprocating mechanism according to claim 5, characterized in that: The guide rod is disposed between any adjacent first rolling elements and second rolling elements in the circumferential direction of the rotary transmission element.

7. The reciprocating mechanism according to claim 4, characterized in that: The base is rotatably provided with a rotating member, the rotating member is connected to the rotating transmission member, and the rotating member is used to drive the rotating transmission member to rotate relative to the base.

8. The reciprocating mechanism according to claim 7, characterized in that: The base is provided with a first plane bearing, a second plane bearing, a first rolling bearing and a second rolling bearing which are coaxially arranged; the rotating member includes a rotating disk and a rotating shaft which are coaxially connected; the first plane bearing and the second plane bearing are axially clamped between the rotating disk and the rotating transmission member; the first rolling bearing is sleeved between the circumferential side wall of the rotating disk and the inner wall of the base; and the second rolling bearing is sleeved between the circumferential side wall of the rotating shaft and the inner wall of the base.

9. The reciprocating mechanism according to claim 8, characterized in that: The end of the rotating transmission member facing the rotating disk is formed with a mounting hole and a clamping protrusion located on the periphery of the mounting hole, the end of the rotating shaft away from the rotating disk is passed through the mounting hole, and the second rolling bearing is sleeved between the outer peripheral wall of the clamping protrusion and the inner wall of the base.

10. A compression device, characterized in that: It comprises a cylinder body, a piston and a reciprocating mechanism as described in any one of claims 1 to 9, wherein the piston is arranged in the cylinder body and connected to the reciprocating body, and when the rotating transmission member rotates, the piston performs reciprocating motion driven by the reciprocating body.

Images