TWI529321B - Structure improvement of balance-shaft gear assembly - Google Patents
Structure improvement of balance-shaft gear assembly Download PDFInfo
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- TWI529321B TWI529321B TW104107714A TW104107714A TWI529321B TW I529321 B TWI529321 B TW I529321B TW 104107714 A TW104107714 A TW 104107714A TW 104107714 A TW104107714 A TW 104107714A TW I529321 B TWI529321 B TW I529321B
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Description
本發明係關於一種平衡軸齒輪組之改良結構，尤指一種適用於機車引擎之平衡軸齒輪組之改良結構。 The present invention relates to an improved structure of a balance shaft gear set, and more particularly to an improved structure of a balance shaft gear set suitable for a locomotive engine.
習知技術如圖8及圖9所示，係習知平衡軸齒輪組之引擎配置圖及立體圖。平衡軸齒輪組91位於一引擎90內，包括有一驅動齒輪92、一被驅動主齒輪93及一被驅動副齒輪94，其中，驅動齒輪92固設於一曲軸920上；被驅動主齒輪93與被驅動副齒輪94係為同軸，設置於一平衡軸930上，且與驅動齒輪92相嚙合轉動；此外，一彈性件96設置於被驅動主齒輪93與被驅動副齒輪94之間，當被驅動主齒輪93之齒部931與被驅動副齒輪94之齒部941對齊時，可額外藉由彈性件96所提供之一夾持力夾住驅動齒輪92之齒部921，可有效消除齒背隙，用以降低齒輪運轉時之嚙合噪音。 As shown in FIGS. 8 and 9, the prior art is an engine configuration diagram and a perspective view of a conventional balance shaft gear set. The balance shaft gear set 91 is located in an engine 90 and includes a drive gear 92, a driven main gear 93 and a driven sub-gear 94. The drive gear 92 is fixed on a crankshaft 920; the driven main gear 93 is driven The driven auxiliary gear 94 is coaxially disposed on a balance shaft 930 and meshed with the drive gear 92. Further, an elastic member 96 is disposed between the driven main gear 93 and the driven auxiliary gear 94. When the tooth portion 931 of the driving main gear 93 is aligned with the tooth portion 941 of the driven sub-gear 94, the tooth portion 921 of the driving gear 92 can be additionally clamped by the clamping force provided by the elastic member 96, thereby effectively eliminating the back of the tooth. Gap, used to reduce the meshing noise when the gear is running.
然而，在實際運轉過程中，夾持力大時雖然可 以消除低轉速時的敲擊音，但卻容易在稍高的引擎轉速以上造成嘯叫音。又，若夾持力小時可以消除稍高引擎轉速以上的嘯叫音，卻容易在低轉速時發生敲擊音。主要原因在於在此種設計使得敲擊音與嘯叫音於特性上係呈現相反現象，因此設計出於兩者之間取得平衡點之被驅動齒輪組變成一重要的課題。 However, in the actual operation process, although the clamping force is large, In order to eliminate the knocking sound at low speeds, it is easy to cause a howling sound above a slightly higher engine speed. Moreover, if the gripping force is small, the howling sound of a slightly higher engine speed or more can be eliminated, but it is easy to generate a knocking sound at a low rotation speed. The main reason is that in this design, the knocking sound and the howling sound are opposite in characteristics, so designing the driven gear set that balances the two becomes an important issue.
發明人緣因於此，本於積極發明之精神，亟思一種可以解決上述問題之平衡軸齒輪組之改良結構，幾經研究實驗終至完成本發明。 Because of this, in the spirit of active invention, this paper proposes an improved structure of a balanced shaft gear set that can solve the above problems, and has completed the present invention after several research experiments.
本發明之主要目的係在提供一種平衡軸齒輪組之改良結構，可降低引擎平衡軸齒輪組之噪音問題，其問題包括引擎低運轉時產生之敲擊音及高轉速時產生之嘯叫音。因此，如何能同時消除上述兩種擾人之聲響，並在結構上取得平衡點即為一重要的問題。 SUMMARY OF THE INVENTION The main object of the present invention is to provide an improved structure of a balance shaft gear set which can reduce the noise problem of the engine balance shaft gear set, and the problems include the knocking sound generated when the engine is running low and the howling sound generated at high speed. Therefore, how to eliminate the above two disturbing sounds at the same time and achieve a balance point in the structure is an important issue.
為達成上述目的，本發明之平衡軸齒輪組之改良結構，用於同時減低運轉齒輪低速及中高轉速運轉時之噪音，其設置於一具有一曲軸之引擎中，包括有一驅動齒輪、一被驅動主齒輪、一被驅動副齒輪、一離心配重塊以及一彈性件，其中驅動齒輪固設於曲軸上，被驅動主齒輪固設於一具有一減震配重塊之平衡軸上，且與驅動齒輪相 嚙合轉動。被驅動副齒輪套設於平衡軸上，並鄰接被驅動主齒輪。離心配重塊分別連接被驅動主齒輪及被驅動副齒輪，使被驅動主齒輪及被驅動副齒輪可作相對轉動。彈性件之兩端部分別連接被驅動主齒輪及被驅動副齒輪，用以提供一預力。 In order to achieve the above object, the improved structure of the balance shaft gear set of the present invention is used for simultaneously reducing the noise of the running gear at low speed and medium and high speed operation, and is disposed in an engine having a crankshaft including a drive gear and a driven a main gear, a driven auxiliary gear, a centrifugal weight, and an elastic member, wherein the driving gear is fixed on the crankshaft, and the driven main gear is fixed on a balance shaft having a damping weight, and Drive gear phase Engagement rotation. The driven sub-gear is sleeved on the balance shaft and abuts the driven main gear. The centrifugal weights are respectively connected to the driven main gear and the driven auxiliary gear, so that the driven main gear and the driven auxiliary gear can be relatively rotated. Both ends of the elastic member are respectively connected to the driven main gear and the driven auxiliary gear to provide a pre-force.
其中，引擎於一特定轉速以下，預力促使被驅動主齒輪與被驅動副齒輪之齒部夾住該驅動齒輪之齒部；於特定轉速以上，離心配重塊之離心力抵抗預力，被驅動主齒輪與該被驅動副齒輪不夾住驅動齒輪之齒部。藉由上述設計，使得被驅動主齒輪與被驅動副齒輪之齒部之間產生相對運動，藉以提供一夾持力，消除在低轉速運轉時齒輪嚙合之敲擊音，亦可在中高轉速運轉時放鬆該夾持力，降低齒輪摩擦之嘯叫音。 Wherein, the engine is below a certain rotational speed, and the pre-force urges the toothed portion of the driven main gear and the driven auxiliary gear to clamp the tooth portion of the driving gear; above a certain rotational speed, the centrifugal force of the centrifugal weight is resisted by the pre-force and is driven The main gear and the driven auxiliary gear do not sandwich the teeth of the drive gear. With the above design, a relative movement between the driven main gear and the toothed portion of the driven sub-gear is generated, thereby providing a clamping force, eliminating the knocking sound of the gear meshing at low speed operation, and also operating at medium and high speeds. When the clamping force is relaxed, the whistling sound of the gear friction is reduced.
上述離心配重塊係於軸方向上設置於被驅動主齒輪與被驅動副齒輪之間。該離心配重塊在特定轉速以上時可發揮其作用，係以離心配重塊之質量所產生之離心力抵抗彈性件之預力，促使被驅動主齒輪與被驅動副齒輪之齒部不再夾住平衡軸驅動齒輪之齒部。 The centrifugal weight is disposed between the driven main gear and the driven sub gear in the axial direction. The centrifugal weight can play its role above a certain speed, and the centrifugal force generated by the mass of the centrifugal weight resists the pre-stress of the elastic member, so that the toothed portion of the driven main gear and the driven auxiliary gear is no longer clamped. Hold the tooth of the balance shaft drive gear.
上述離心配重塊受離心力及彈性件之預力之交互作用而產生滑移運動。於不同轉速運轉時，所受之離心力與預力之合力皆不相同，藉此，離心配重塊帶動被驅動副齒輪可相對被驅動主齒輪上產生轉動。 The centrifugal weight is subjected to a sliding motion by the interaction of the centrifugal force and the pre-force of the elastic member. When operating at different speeds, the combined force of the centrifugal force and the pre-force are different, whereby the centrifugal weights drive the driven sub-gear to rotate relative to the driven main gear.
其中，上述離心配重塊可更包括二導引溝，分別套設於被驅動主齒輪之二導引銷。藉此，係作為離心配重塊受離心力作用而產生相對滑移之機械結構。 Wherein, the centrifugal weight can further comprise two guiding grooves, which are respectively sleeved on the two guiding pins of the driven main gear. Thereby, it is a mechanical structure in which the centrifugal weight is subjected to centrifugal force to generate relative slip.
再者，本發明另一種設計之離心配重塊可更具有一旋轉中心，受離心力及預力之交互作用可產生旋轉運動。藉此，係作為離心配重塊受離心力作用而產生相對旋轉之機械結構。 Furthermore, the centrifugal weight of another design of the present invention may have a center of rotation, and the interaction of centrifugal force and pre-force may generate a rotary motion. Thereby, it is a mechanical structure in which the centrifugal weight is subjected to centrifugal force to generate relative rotation.
上述離心配重塊可更包括一凸出銷，穿設於被驅動副齒輪之一帶動孔。藉此，離心配重塊之運動可藉由上述凸出銷連帶使被驅動副齒輪轉動，則在特定轉速以上，被驅動副齒輪之齒部外廓可以完全在被動驅動主齒輪之齒部外廓內。 The centrifugal weight may further include a protruding pin that passes through one of the driven auxiliary gears to drive the hole. Thereby, the movement of the centrifugal weight can be rotated by the protruding pin to rotate the driven auxiliary gear, and above the specific rotation speed, the tooth profile of the driven auxiliary gear can be completely outside the tooth of the passive driving main gear. Inside the profile.
上述彈性件可於軸方向上設置於被驅動主齒輪及被驅動副齒輪之間。該彈性件可為一扭轉彈簧，其兩端分別勾設於被驅動主齒輪及被驅動副齒輪，並提供一預力。藉此，該預力可促使被驅動副齒輪轉動以達到被驅動主齒輪與被驅動副齒輪之齒部夾住驅動齒輪之齒部。 The elastic member may be disposed between the driven main gear and the driven sub gear in the axial direction. The elastic member may be a torsion spring, and the two ends thereof are respectively hooked on the driven main gear and the driven auxiliary gear, and provide a pre-force. Thereby, the pre-force can cause the driven sub-gear to rotate to reach the tooth portion of the driven main gear and the driven sub-gear sandwiching the tooth portion of the drive gear.
上述彈性件亦可為一拉伸彈簧，其兩端分別勾設於被驅動主齒輪及離心配重塊，並提供一預力。 The elastic member may also be a tension spring, and the two ends thereof are respectively hooked on the driven main gear and the centrifugal weight, and provide a pre-force.
此外，於軸方向上，離心配重塊之質心和平衡軸之質心之連線通過該平衡軸之中心。藉此，離心配重塊之質量亦可為引擎減震的一部分配重，可以減少減震配重 塊之大小，減少齒輪組之所占體積。 Further, in the axial direction, the line connecting the centroid of the centrifugal weight and the center of mass of the balance shaft passes through the center of the balance shaft. Thereby, the mass of the centrifugal weight can also be part of the counterweight of the engine damping, which can reduce the damping weight. The size of the block reduces the volume of the gear set.
此外，基於上述之離心配重塊之機械結構作用方式，本發明之另一種設計，其設置於一具有一曲軸之引擎中，包括有一驅動主齒輪、一驅動副齒輪、一被驅動齒輪、一離心配重塊以及一彈性件，其中被驅動齒輪固設於一減震配重塊之平衡軸上，驅動主齒輪固設於曲軸上，且與被驅動齒輪相嚙合轉動。驅動副齒輪套設於曲軸上，並鄰接驅動主齒輪。離心配重塊分別連接驅動主齒輪及驅動副齒輪，使驅動主齒輪及驅動副齒輪可作相對轉動。彈性件之兩端部分別連接驅動主齒輪及驅動副齒輪，用以提供一預力。 In addition, based on the mechanical structure of the above-described centrifugal weight, another design of the present invention is provided in an engine having a crankshaft, including a driving main gear, a driving sub gear, a driven gear, and a The centrifugal weight and an elastic member are fixed on the balance shaft of a damping weight, and the driving main gear is fixed on the crankshaft and meshed with the driven gear. The drive sub-gear is sleeved on the crankshaft and abuts the drive main gear. The centrifugal weights are respectively connected to the driving main gear and the driving auxiliary gear, so that the driving main gear and the driving auxiliary gear can be relatively rotated. The two ends of the elastic member are respectively connected to the driving main gear and the driving sub gear to provide a pre-force.
以上概述與接下來的詳細說明皆為示範性質是為了進一步說明本發明的申請專利範圍。而有關本發明的其他目的與優點，將在後續的說明與圖示加以闡述。 The above summary and the following detailed description are exemplary in order to further illustrate the scope of the invention. Other objects and advantages of the present invention will be described in the following description and drawings.
1‧‧‧平衡軸齒輪組 1‧‧‧Balance shaft gear set
10‧‧‧引擎 10‧‧‧ engine
2‧‧‧驅動齒輪 2‧‧‧ drive gear
20‧‧‧曲軸 20‧‧‧ crankshaft
21‧‧‧齒部 21‧‧‧ teeth
3‧‧‧被驅動主齒輪 3‧‧‧Driven main gear
30‧‧‧平衡軸 30‧‧‧Balance shaft
301‧‧‧減震配重塊 301‧‧‧Vibration weights
31‧‧‧齒部 31‧‧‧ teeth
32‧‧‧導引銷 32‧‧‧ Guide pin
33‧‧‧軸管部 33‧‧‧ shaft tube department
4‧‧‧被驅動副齒輪 4‧‧‧Driven auxiliary gear
41‧‧‧齒部 41‧‧‧ teeth
42‧‧‧帶動孔 42‧‧‧Drive holes
5‧‧‧離心配重塊 5‧‧‧ Centrifugal weights
51‧‧‧凸出銷 51‧‧‧ protruding pin
52‧‧‧導引溝 52‧‧‧ Guide groove
6‧‧‧彈性件 6‧‧‧Flexible parts
71‧‧‧旋轉銷 71‧‧‧Rotary pin
72‧‧‧旋轉中心 72‧‧‧ Rotating Center
90‧‧‧引擎 90‧‧‧ engine
91‧‧‧平衡軸齒輪組 91‧‧‧Balance shaft gear set
92‧‧‧驅動齒輪 92‧‧‧ drive gear
920‧‧‧曲軸 920‧‧‧ crankshaft
921‧‧‧齒部 921‧‧‧ teeth
93‧‧‧被驅動主齒輪 93‧‧‧Driven main gear
930‧‧‧平衡軸 930‧‧‧Balance shaft
931‧‧‧齒部 931‧‧‧ teeth
94‧‧‧被驅動副齒輪 94‧‧‧Driven auxiliary gear
941‧‧‧齒部 941‧‧‧ teeth
96‧‧‧彈性件 96‧‧‧Flexible parts
A‧‧‧平衡軸質心位置 A‧‧‧ Balance shaft centroid position
B‧‧‧離心配重塊質心位置 B‧‧‧ Centrifugal weight block centroid position
C‧‧‧平衡軸軸心 C‧‧‧balance shaft axis
圖1係本發明第一實施例之平衡軸齒輪組之改良結構之引擎配置圖。 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an engine configuration of an improved structure of a balance shaft gear set according to a first embodiment of the present invention.
圖2係本發明第一實施例之平衡軸齒輪組之改良結構之分解圖。 Fig. 2 is an exploded view showing the improved structure of the balance shaft gear set of the first embodiment of the present invention.
圖3係本發明第一實施例之被驅動主齒輪及被驅動副 齒輪之組合側視圖。 Figure 3 is a driven main gear and a driven pair of the first embodiment of the present invention; Side view of the combination of gears.
圖4係本發明第一實施例之平衡軸齒輪組之改良結構之特定轉速以下之狀態示意圖。 Fig. 4 is a view showing a state in which the improved structure of the balance shaft gear set of the first embodiment of the present invention is below a specific rotation speed.
圖5係本發明第一實施例之平衡軸齒輪組之改良結構之特定轉速以上之狀態示意圖。 Fig. 5 is a view showing a state in which the modified structure of the balance shaft gear set according to the first embodiment of the present invention has a specific rotational speed or more.
圖6A係本發明第一實施例之平衡軸及其質心狀態之參考圖。 Fig. 6A is a reference diagram of a balance shaft and a center of mass state thereof according to a first embodiment of the present invention.
圖6B係本發明第一實施例之離心配重塊及其質心狀態之參考圖。 Fig. 6B is a reference view of the centrifugal weight of the first embodiment of the present invention and its centroid state.
圖6C係本發明第一實施例之平衡軸與被驅動主齒輪及其組裝後之質心狀態之參考圖。 Fig. 6C is a reference view of the balance shaft and the driven main gear of the first embodiment of the present invention and the state of mass after assembly thereof.
圖7係本發明第二實施例之平衡軸齒輪組之改良結構之分解圖。 Figure 7 is an exploded view of the improved structure of the balance shaft gear set of the second embodiment of the present invention.
圖8係習知平衡軸齒輪組之引擎配置圖。 Figure 8 is an engine configuration diagram of a conventional balance shaft gear set.
圖9係習知平衡軸齒輪組之立體圖。 Figure 9 is a perspective view of a conventional balance shaft gear set.
請參閱圖1，係本發明第一實施例之平衡軸齒輪組之改良結構之引擎配置圖。圖中出示一種平衡軸齒輪組之改良結構，該平衡軸齒輪組1設置於具有一曲軸20及一平衡軸30之引擎10中，其中，本發明之平衡軸齒輪組1主要包括有三個齒輪：固設於曲軸20上之驅動齒輪2、固設於平衡軸30上之被驅動主齒輪3以及套設於平衡軸30 上被驅動副齒輪4。上述驅動齒輪2係與被驅動主齒輪3相互嚙合轉動，上述被驅動副齒輪4可相對被驅動主齒輪3同軸旋轉。 Please refer to FIG. 1, which is an engine configuration diagram of an improved structure of a balance shaft gear set according to a first embodiment of the present invention. The figure shows an improved structure of a balance shaft gear set 1 which is disposed in an engine 10 having a crankshaft 20 and a balance shaft 30, wherein the balance shaft gear set 1 of the present invention mainly comprises three gears: a driving gear 2 fixed to the crankshaft 20, a driven main gear 3 fixed to the balance shaft 30, and a sleeve 30 disposed on the balance shaft 30 The upper auxiliary gear 4 is driven. The drive gear 2 is meshed with the driven main gear 3, and the driven sub-gear 4 is rotatable coaxially with respect to the driven main gear 3.
接者，請參閱圖2及圖3，係本發明第一實施例之平衡軸齒輪組之改良結構之分解圖，以及被驅動主齒輪及被驅動副齒輪之組合側視圖。本發明之平衡軸齒輪組除了前述說明所提及之驅動齒輪2、被驅動主齒輪3、被驅動副齒輪4之外，另包括有一離心配重塊5及一彈性件6。如圖所示，被驅動主齒輪3係以一軸管部33固設於一具有一減震配重塊301之平衡軸30上，同時可與平衡軸30連動，其外周緣設有複數齒部31，並於側面表設有二導引銷32。一彈性件6在本實施例中係為一扭轉彈簧，套設於軸管部33上，該彈性件6之兩端部分別勾設於被驅動主齒輪3及被驅動副齒輪4，用以提供一施加於驅動齒輪2之夾持預力。離心配重塊5在本實施例中係為一弧形質量塊，其包括二導引溝52，分別套設於該被驅動主齒輪3之二導引銷32，其中，導引溝52之溝槽長度略大於導引銷32之外徑，用以提供離心配重塊5之滑移路徑；此外，離心配重塊5更包括一凸出銷51，穿設於被驅動副齒輪4之一帶動孔42，用以帶動被驅動副齒輪4與被驅動主齒輪3產生相對旋轉。前述被驅動副齒輪4係與被驅動主齒輪3同軸套設於平衡軸30上，並鄰接被驅動主齒輪3，因此，在本實施例中， 離心配重塊5及彈性件6係於軸方向上設置於被驅動主齒輪3與被驅動副齒輪4之間。 Referring to Figures 2 and 3, there is shown an exploded view of the improved structure of the balance shaft gear set of the first embodiment of the present invention, and a combined side view of the driven main gear and the driven sub-gear. In addition to the drive gear 2, the driven main gear 3, and the driven sub-gear 4 mentioned in the foregoing description, the balance shaft gear set of the present invention further includes a centrifugal weight 5 and an elastic member 6. As shown in the figure, the driven main gear 3 is fixed on a balance shaft 30 having a damping weight 301 by a shaft tube portion 33, and can be interlocked with the balance shaft 30, and the outer circumference thereof is provided with a plurality of teeth. 31, and two guide pins 32 are provided on the side surface. In this embodiment, an elastic member 6 is a torsion spring which is sleeved on the shaft tube portion 33. The two ends of the elastic member 6 are respectively hooked on the driven main gear 3 and the driven sub-gear 4 for A clamping preload applied to the drive gear 2 is provided. The centrifugal weight 5 is a curved mass in the embodiment, and includes two guiding grooves 52 respectively sleeved on the two guiding pins 32 of the driven main gear 3, wherein the guiding groove 52 The length of the groove is slightly larger than the outer diameter of the guide pin 32 to provide a sliding path of the centrifugal weight 5; further, the centrifugal weight 5 further includes a protruding pin 51 which is disposed through the driven auxiliary gear 4 A driving hole 42 is configured to drive the driven auxiliary gear 4 to rotate relative to the driven main gear 3. The driven auxiliary gear 4 is coaxially sleeved with the driven main gear 3 on the balance shaft 30 and adjacent to the driven main gear 3, and therefore, in the present embodiment, The centrifugal weight 5 and the elastic member 6 are disposed between the driven main gear 3 and the driven sub gear 4 in the axial direction.
請參閱圖4及圖5，係本發明第一實施例之平衡軸齒輪組之改良結構之特定轉速以下之狀態示意圖及特定轉速以上之狀態示意圖。如圖4及圖5所示，係為本發明兩種作動模式，其依據不同的引擎轉速而有相異的齒輪匹配結構。首先，在特定轉速以下，彈性件6所提供之預力促使被驅動主齒輪3與被驅動副齒輪4之齒部31,41夾住驅動齒輪2之齒部21，此時離心配重塊因預力大於離心力而具有向齒輪中心移動之趨向，使得被驅動副齒輪4之齒部41與被驅動主齒輪3之齒部31之間存在齒距差異，而該交錯結構具有抵頂、卡掣之作用，有效消除齒背隙且降低齒輪運轉時之敲擊音。 4 and FIG. 5 are schematic diagrams showing states of the improved structure of the balanced shaft gear set according to the first embodiment of the present invention below a specific rotational speed and states of the specific rotational speed. As shown in FIG. 4 and FIG. 5, the two actuation modes of the present invention have different gear matching structures according to different engine speeds. First, below a certain number of revolutions, the pre-force provided by the elastic member 6 causes the driven main gear 3 and the tooth portions 31, 41 of the driven sub-gear 4 to clamp the tooth portion 21 of the drive gear 2, at which time the centrifugal weight is The pre-force is greater than the centrifugal force and has a tendency to move toward the center of the gear such that there is a difference in pitch between the tooth portion 41 of the driven sub-gear 4 and the tooth portion 31 of the driven main gear 3, and the staggered structure has an abutment and a click. Its role is to effectively eliminate the backlash of the teeth and reduce the knocking sound when the gear is running.
又，在特定轉速以上，離心配重塊5之離心力抵抗彈性件6所提供之預力，使得被驅動主齒輪3與被驅動副齒輪4不夾住驅動齒輪2之齒部21，此時離心配重塊因預力小於離心力而具有從齒輪中心向外移動之趨向，連動被驅動副齒輪4克服彈性件6之預力而產生相對於被驅動主齒輪3之轉動，被驅動副齒輪4之齒部41外廓完全沒入被驅動主齒輪3之齒部31外廓內，以防特定轉速以上時所產生之嘯叫音。 Further, above a certain number of revolutions, the centrifugal force of the centrifugal weight 5 resists the pre-force provided by the elastic member 6, so that the driven main gear 3 and the driven sub-gear 4 do not sandwich the tooth portion 21 of the drive gear 2, at this time The heart weight has a tendency to move outward from the center of the gear due to the pre-force being less than the centrifugal force, and the driven auxiliary gear 4 is driven against the pre-force of the elastic member 6 to generate a rotation relative to the driven main gear 3, and the driven auxiliary gear 4 is driven. The outer contour of the tooth portion 41 is completely immersed in the outer contour of the tooth portion 31 of the driven main gear 3 to prevent the howling sound generated when the specific rotational speed is higher than or equal to.
接著，請參閱圖6A至圖6C，係本發明第一實 施例之平衡軸及其質心狀態之參考圖、離心配重塊及其質心狀態之參考圖以及平衡軸與被驅動主齒輪及其組裝後之質心狀態之參考圖。如圖6A所示，平衡軸30之質心約略於圖中A點之位置；如圖6B所示，離心配重塊5之質心約略於圖中B點之位置；如圖6C所示，被驅動主齒輪3固設於平衡軸30後，組立狀態下之質心係位於圖中A點及B點之連線位置上，並且通過平衡軸30之軸心C。藉此，離心配重塊5之質量亦可為引擎減震的一部分配重，可以減少減震配重塊301之大小。 Next, please refer to FIG. 6A to FIG. 6C, which is the first embodiment of the present invention. A reference diagram of the balance shaft and its centroid state of the embodiment, a reference diagram of the centrifugal weight and its centroid state, and a reference diagram of the balance shaft and the driven main gear and their assembled centroid states. As shown in FIG. 6A, the center of mass of the balance shaft 30 is approximately at the position of point A in the figure; as shown in FIG. 6B, the center of mass of the centrifugal weight 5 is approximately at the position of point B in the figure; as shown in FIG. 6C, After the driven main gear 3 is fixed to the balance shaft 30, the center of mass in the assembled state is located at the line connecting points A and B in the figure, and passes through the axis C of the balance shaft 30. Thereby, the mass of the centrifugal weight 5 can also be a part of the counterweight of the engine damping, and the size of the damping weight 301 can be reduced.
此外，請參閱圖7，係本發明第二實施例之平衡軸齒輪組之改良結構之分解圖。本實施例之基本架構皆與第一實施例相同，包括有驅動齒輪2(參見圖1)、被驅動主齒輪3、被驅動副齒輪4、一離心配重塊5及一彈性件6。如圖所示，被驅動主齒輪3係以一軸管部33固設於一具有一減震配重塊301之平衡軸30上，同時可與平衡軸30連動，其外周緣設有複數齒部31，並於側面表設有一旋轉銷71，一彈性件6在本實施例中係為一扭轉彈簧，套設於軸管部33上，該彈性件6之兩端部分別勾設於被驅動主齒輪3及被驅動副齒輪4，用以提供一施加於驅動齒輪2之夾持預力。離心配重塊5在本實施例中係為一弧形質量塊，其包括一旋轉中心72，套設於該驅動主齒輪3之旋轉銷71內，其中，旋轉銷71係作為一樞轉軸心，可供離心配重塊5沿該軸線 旋轉；此外，離心配重塊5更包括一凸出銷51，穿設於被驅動副齒輪4之一帶動孔42，用以帶動被驅動副齒輪4與被驅動主齒輪3產生相對旋轉。 Further, please refer to Fig. 7, which is an exploded view of the improved structure of the balance shaft gear set of the second embodiment of the present invention. The basic structure of this embodiment is the same as that of the first embodiment, and includes a drive gear 2 (see FIG. 1), a driven main gear 3, a driven sub-gear 4, a centrifugal weight 5, and an elastic member 6. As shown in the figure, the driven main gear 3 is fixed on a balance shaft 30 having a damping weight 301 by a shaft tube portion 33, and can be interlocked with the balance shaft 30, and the outer circumference thereof is provided with a plurality of teeth. 31, and a rotating pin 71 is disposed on the side surface, and an elastic member 6 is a torsion spring in the embodiment, and is sleeved on the shaft tube portion 33. Both ends of the elastic member 6 are respectively hooked on the driven portion. The main gear 3 and the driven sub gear 4 are used to provide a clamping preload applied to the drive gear 2. The centrifugal weight 5 is an arc-shaped mass in the present embodiment, and includes a rotation center 72 which is sleeved in the rotation pin 71 of the driving main gear 3, wherein the rotation pin 71 serves as a pivoting axis. , for the centrifugal weight 5 along the axis In addition, the centrifugal weight 5 further includes a protruding pin 51 that passes through one of the driven auxiliary gears 4 to drive the hole 42 to drive the driven auxiliary gear 4 to rotate relative to the driven main gear 3.
藉由上述設計，提供另一種機械結構，使得離心配重塊受離心力及預力之交互作用可藉由旋轉銷及旋轉中心之配合而產生相對旋轉運動，促使被驅動主齒輪與被驅動副齒輪之齒部在低轉速下夾住該驅動齒輪之齒部；於特定轉速以上，離心配重塊之離心力抵抗預力，被驅動主齒輪與該被驅動副齒輪不夾住驅動齒輪之齒部。 With the above design, another mechanical structure is provided, so that the centrifugal weight and the interaction of the pre-force can generate a relative rotational motion by the cooperation of the rotating pin and the rotating center, and the driven main gear and the driven auxiliary gear are driven. The tooth portion clamps the tooth portion of the drive gear at a low rotation speed; above a specific rotation speed, the centrifugal force of the centrifugal weight block resists the pre-force, and the driven main gear and the driven auxiliary gear do not sandwich the tooth portion of the drive gear.
上述實施例僅係為了方便說明而舉例而已，本發明所主張之權利範圍自應以申請專利範圍所述為準，而非僅限於上述實施例。 The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.
3‧‧‧被驅動主齒輪 3‧‧‧Driven main gear
30‧‧‧平衡軸 30‧‧‧Balance shaft
301‧‧‧減震配重塊 301‧‧‧Vibration weights
31‧‧‧齒部 31‧‧‧ teeth
32‧‧‧導引銷 32‧‧‧ Guide pin
33‧‧‧軸管部 33‧‧‧ shaft tube department
4‧‧‧被驅動副齒輪 4‧‧‧Driven auxiliary gear
41‧‧‧齒部 41‧‧‧ teeth
42‧‧‧帶動孔 42‧‧‧Drive holes
5‧‧‧離心配重塊 5‧‧‧ Centrifugal weights
51‧‧‧凸出銷 51‧‧‧ protruding pin
52‧‧‧導引溝 52‧‧‧ Guide groove
6‧‧‧彈性件 6‧‧‧Flexible parts
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104107714A TWI529321B (en) | 2015-03-11 | 2015-03-11 | Structure improvement of balance-shaft gear assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104107714A TWI529321B (en) | 2015-03-11 | 2015-03-11 | Structure improvement of balance-shaft gear assembly |
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| Publication Number | Publication Date |
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| TWI529321B true TWI529321B (en) | 2016-04-11 |
| TW201632757A TW201632757A (en) | 2016-09-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720518A (en) * | 2019-03-19 | 2020-09-29 | 米巴精密零部件（中国）有限公司 | Gear wheel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720518A (en) * | 2019-03-19 | 2020-09-29 | 米巴精密零部件（中国）有限公司 | Gear wheel |
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